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november 2016 docid2143 rev 34 1 / 54 this is information on a product in full production. www.st.com L78 positive voltage regulator ics datasheet - production data features ? output current up to 1.5 a ? output voltages of 5; 6; 8; 8.5; 9; 12; 15; 18; 24 v ? thermal overload protection ? short circuit protection ? output transition soa protection ? 2 % output voltage tolerance (a version) ? guaranteed in extended temperature range (a version) description the L78 series of three - terminal positive regulators is available in to - 220, to - 220fp, d2pak and dpak packages and several fixed output voltages, making it useful in a wide range of applic ations. these regulators can provide local on - card regulation, eliminating the distribution problems associated with single point regulation. each type embeds internal current limiting, thermal shut - down and safe area protection, making it essentially inde structible. if adequate heat sinking is provided, they can deliver over 1 a output current. although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltage and currents.
contents L78 2 / 54 docid2143 rev 34 contents 1 diagram ................................ ................................ ............................ 3 2 pin configuration ................................ ................................ ............. 4 3 maximum ratings ................................ ................................ ............. 5 4 test circuits ................................ ................................ ..................... 6 5 electrical characteristics ................................ ................................ 7 6 application information ................................ ................................ 23 6.1 design consideration ................................ ................................ ....... 23 7 typical performance ................................ ................................ ..... 31 8 package information ................................ ................................ ..... 33 8.1 to - 220 (dual gauge) package information ................................ ...... 34 8.2 to - 22 0 (single gauge) package information ................................ ... 36 8.3 to - 220fp package information ................................ ...................... 38 8.4 to - 220 packing information ................................ ............................ 40 8.5 dpak package information ................................ ............................. 41 8.6 d2pak (smd 2l std - st) type a package information ................... 44 8.7 d2pak (smd 2l wooseok - subcon.) package information .............. 46 8.8 d2pak and dpak packing information ................................ ........... 49 9 ordering information ................................ ................................ ..... 52 10 revision history ................................ ................................ ............ 53
L78 diagram docid2143 rev 34 3 / 54 1 diagram figure 1 : block diagram
pin configuration L78 4 / 54 docid2143 rev 34 2 pin configuration figure 2 : pin connections (top view) figure 3 : schematic diagram
L78 maximum ratings docid2143 rev 34 5 / 54 3 maximum ratings table 1: absolute maximum ratings symbol parameter value unit v i dc input voltage for v o = 5 to 18 v 35 v for v o = 20, 24 v 40 i o output current internally limited p d power dissipation internally limited t stg storage temperature range - 65 to 150 c t op operating junction temperature range for L78xxc, L78xxac 0 to 125 c for L78xxab - 40 to 125 absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. table 2: thermal data symbol parameter d2pak dpak to - 220 to - 220fp unit r thjc thermal resistance junction - case 3 8 5 5 c/w r thja thermal resistance junction - ambient 62.5 100 50 60 c/w figure 4 : application circuits
test circuits L78 6 / 54 docid2143 rev 34 4 test circuits figure 5 : dc parameter figure 6 : load regulation figure 7 : ripple rejection
L78 electrical characteristics docid2143 rev 34 7 / 54 5 electrical characteristi cs v i = 10 v, i o = 1 a, t j = 0 to 125 c (L7805ac), t j = - 40 to 125 c (L7805ab), unless otherwise specified a table 3: electrical characteristics of L7805a symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 4.9 5 5.1 v v o output voltage i o = 5 ma to 1 a, v i = 7.5 to 18 v 4.8 5 5.2 v v o output voltage i o = 1 a, v i = 18 to 20 v, t j = 25 c 4.8 5 5.2 v ?v o (1) line regulation v i = 7.5 to 25 v, i o = 500 ma, t j = 25 c 7 50 mv v i = 8 to 12 v 10 50 mv v i = 8 to 12 v, t j = 25 c 2 25 mv v i = 7.3 to 20 v, t j = 25 c 7 50 mv ?v o (1) load regulation i o = 5 ma to 1 a 25 100 mv i o = 5 ma to 1.5 a, t j = 25 c 30 100 i o = 250 to 750 ma 8 50 i q quiescent current t j = 25 c 4.3 6 ma 6 ma ?i q quiescent current change v i = 8 to 23 v, i o = 500 ma 0.8 ma v i = 7.5 to 20 v, t j = 25 c 0.8 ma i o = 5 ma to 1 a 0.5 ma svr supply voltage rejection v i = 8 to 18 v, f = 120 hz, i o = 500 ma 68 db v d dropout voltage i o = 1 a, t j = 25 c 2 v en output noise voltage t a = 25 c, b =10 hz to 100 khz 10 v/v o r o output resistance f = 1 khz 17 m? i sc short circuit current v i = 35 v, t a = 25 c 0.2 a i scp short circuit peak current t j = 25 c 2.2 a ?v o /?t output voltage drift - 1.1 mv/c notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
electrical chara cteristics L78 8 / 54 docid2143 rev 34 v i = 11 v, i o = 1 a, t j = 0 to 125 c (L7806ac), t j = - 40 to 125 c (L7806ab), unless otherwise specified a t able 4: electrical characteristics of L7806a symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 5.88 6 6.12 v v o output voltage i o = 5 ma to 1 a, v i = 8.6 to 19 v 5.76 6 6.24 v v o output voltage i o = 1 a, v i = 19 to 21 v, t j = 25 c 5.76 6 6.24 v ?v o (1) line regulation v i = 8.6 to 25 v, i o = 500 ma, t j = 25 c 9 60 mv v i = 9 to 13 v 11 60 mv v i = 9 to 13 v, t j = 25 c 3 30 mv v i = 8.3 to 21 v, t j = 25 c 9 60 mv ?v o (1) load regulation i o = 5 ma to 1 a 25 100 mv i o = 5 ma to 1.5 a, t j = 25 c 30 100 i o = 250 to 750 ma 10 50 i q quiescent current t j = 25 c 4.3 6 ma 6 ma ?i q quiescent current change v i = 9 to 24 v, i o = 500 ma 0.8 ma v i = 8.6 to 21 v, t j = 25 c 0.8 ma i o = 5 ma to 1 a 0.5 ma svr supply voltage rejection v i = 9 to 19 v, f = 120 hz, i o = 500 ma 65 db v d dropout voltage i o = 1 a, t j = 25 c 2 v en output noise voltage t a = 25 c, b =10 hz to 100 khz 10 v/v o r o output resistance f = 1 khz 17 m? i sc short circuit current v i = 35 v, t a = 25 c 0.2 a i scp short circuit peak current t j = 25 c 2.2 a ?v o /?t output voltage drift - 0.8 mv/c notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
L78 electrical characteristics docid2143 rev 34 9 / 54 v i = 14 v, i o = 1 a, t j = 0 to 125 c (L7808ac), t j = - 40 to 125 c (L7808ab), unless otherwise specified a table 5: electrical characteristics of L7808a symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 7.84 8 8.16 v v o output voltage i o = 5 ma to 1 a, v i = 10.6 to 21 v 7.7 8 8.3 v v o output voltage i o = 1 a, v i = 21 to 23 v, t j = 25 c 7.7 8 8.3 v ?v o (1) line regulation v i = 10.6 to 25 v, i o = 500 ma, t j = 25 c 12 80 mv v i = 11 to 17 v 15 80 mv v i = 11 to 17 v, t j = 25 c 5 40 mv v i = 10.4 to 23 v, t j = 25 c 12 80 mv ?v o (1) load regulation i o = 5 ma to 1 a 25 100 mv i o = 5 ma to 1.5 a, t j = 25 c 30 100 i o = 250 to 750 ma 10 50 i q quiescent current t j = 25 c 4.3 6 ma 6 ma ?i q quiescent current change v i = 11 to 23 v, i o = 500 ma 0.8 ma v i = 10.6 to 23 v, t j = 25 c 0.8 ma i o = 5 ma to 1 a 0.5 ma svr supply voltage rejection v i = 11.5 to 21.5 v, f = 120 hz, i o = 500 ma 62 db v d dropout voltage i o = 1 a, t j = 25 c 2 v en output noise voltage t a = 25 c, b =10 hz to 100 khz 10 v/v o r o output resistance f = 1 khz 18 m? i sc short circuit current v i = 35 v, t a = 25 c 0.2 a i scp short circuit peak current t j = 25 c 2.2 a ?v o /?t output voltage drift - 0.8 mv/c notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
electrical characteristics L78 10 / 54 docid2143 rev 34 v i = 15 v, i o = 1 a, t j = 0 to 125 c (L7809ac), t j = - 40 to 125 c (L7809ab), unless otherwise specified a table 6: electrical characteristics of L7809a symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 8.82 9 9.18 v v o output voltage i o = 5 ma to 1 a, v i = 10.6 to 22 v 8.65 9 9.35 v v o output voltage i o = 1 a, v i = 22 to 24 v, t j = 25 c 8.65 9 9.35 v ?v o (1) line regulation v i = 10.6 to 25 v, i o = 500 ma, t j = 25 c 12 90 mv v i = 11 to 17 v 15 90 mv v i = 11 to 17 v, t j = 25 c 5 45 mv v i = 11.4 to 23 v, t j = 25 c 12 90 mv ?v o (1) load regulation i o = 5 ma to 1 a 25 100 mv i o = 5 ma to 1.5 a, t j = 25 c 30 100 i o = 250 to 750 ma 10 50 i q quiescent current t j = 25 c 4.3 6 ma 6 ma ?i q quiescent current change v i = 11 to 25 v, i o = 500 ma 0.8 ma v i = 10.6 to 23 v, t j = 25 c 0.8 ma i o = 5 ma to 1 a 0.5 ma svr supply voltage rejection v i = 11.5 to 21.5 v, f = 120 hz, i o = 500 ma 61 db v d dropout voltage i o = 1 a, t j = 25 c 2 v en output noise voltage t a = 25 c, b =10 hz to 100 khz 10 v/v o r o output resistance f = 1 khz 18 m? i sc short circuit current v i = 35 v, t a = 25 c 0.2 a i scp short circuit peak current t j = 25 c 2.2 a ?v o /?t output voltage drift - 0.8 mv/c notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
L78 electrical characteristics docid2143 rev 34 11 / 54 v i = 19 v, i o = 1 a, t j = 0 to 125 c (L7812ac), t j = - 40 to 125 c (L7812ab), unless otherwise specified a table 7: electrical characteristics of L7812a symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 11.75 12 12.25 v v o output voltage i o = 5 ma to 1 a, v i = 14.8 to 25 v 11.5 12 12.5 v v o output voltage i o = 1 a, v i = 25 to 27 v, t j = 25 c 11.5 12 12.5 v ?v o (1) line regulation v i = 14.8 to 30 v, i o = 500 ma, t j = 25 c 13 120 mv v i = 16 to 12 v 16 120 mv v i = 16 to 12 v, t j = 25 c 6 60 mv v i = 14.5 to 27 v, t j = 25 c 13 120 mv ?v o (1) load regulation i o = 5 ma to 1 a 25 100 mv i o = 5 ma to 1.5 a, t j = 25 c 30 100 i o = 250 to 750 ma 10 50 i q quiescent current t j = 25 c 4.4 6 ma 6 ma di q quiescent current change v i = 15 to 30 v, i o = 500 ma 0.8 ma v i = 14.8 to 27 v, t j = 25 c 0.8 ma i o = 5 ma to 1 a 0.5 ma svr supply voltage rejection v i = 15 to 25 v, f = 120 hz, i o = 500 ma 60 db v d dropout voltage i o = 1 a, t j = 25 c 2 v en output noise voltage t a = 25 c, b = 10 hz to 100 khz 10 v/v o r o output resistance f = 1 khz 18 m? i sc short circuit current v i = 35 v, t a = 25 c 0.2 a i scp short circuit peak current t j = 25 c 2.2 a ?v o /?t output voltage drift - 1 mv/c notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
electr ical characteristics L78 12 / 54 docid2143 rev 34 v i = 23 v, i o = 1 a, t j = 0 to 125 c (L7815ac), t j = - 40 to 125 c (L7815ab), unless otherwise specified a table 8: electrical characteristics of L7815a symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 14.7 15 15.3 v v o output voltage i o = 5 ma to 1 a, v i = 17.9 to 28 v 14.4 15 15.6 v v o output voltage i o = 1 a, v i = 28 to 30 v, t j = 25 c 14.4 15 15.6 v ?v o (1) line regulation v i = 17.9 to 30 v, i o = 500 ma, t j = 25 c 13 150 mv v i = 20 to 26 v 16 150 mv v i = 20 to 26 v, t j = 25 c 6 75 mv v i = 17.5 to 30 v, t j = 25 c 13 150 mv ?v o (1) load regulation i o = 5 ma to 1 a 25 100 mv i o = 5 ma to 1.5 a, t j = 25 c 30 100 i o = 250 to 750 ma 10 50 i q quiescent current t j = 25 c 4.4 6 ma 6 ma ?i q quiescent current change v i = 17.5 to 30 v, i o = 500 ma 0.8 ma v i = 17.5 to 30 v, t j = 25 c 0.8 ma i o = 5 ma to 1 a 0.5 ma svr supply voltage rejection v i = 18.5 to 28.5 v, f = 120 hz, i o = 500 ma 58 db v d dropout voltage i o = 1 a, t j = 25 c 2 v en output noise voltage t a = 25 c, b = 10hz to 100 khz 10 v/v o r o output resistance f = 1 khz 19 m? i sc short circuit current v i = 35 v, t a = 25 c 0.2 a i scp short circuit peak current t j = 25 c 2.2 a ?v o /?t output voltage drift - 1 mv/c notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
L78 electrical characteristics docid2143 rev 34 13 / 54 v i = 33 v, i o = 1 a, t j = 0 to 125 c (L7824ac), t j = - 40 to 125 c (L7824ab), unless otherwise specified a table 9: electrical characteristics of L7824a symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 23.5 24 24.5 v v o output voltage i o = 5 ma to 1 a, v i = 27.3 to 37 v 23 24 25 v v o output voltage i o = 1 a, v i = 37 to 38 v, t j = 25 c 23 24 25 v ?v o (1) line regulation v i = 27 to 38 v, i o = 500 ma, t j = 25 c 31 240 mv v i = 30 to 36 v 35 200 mv v i = 30 to 36 v, t j = 25 c 14 120 mv v i = 26.7 to 38 v, t j = 25 c 31 240 mv ?v o (1) load regulation i o = 5 ma to 1 a 25 100 mv i o = 5 ma to 1.5 a, t j = 25 c 30 100 i o = 250 to 750 ma 10 50 i q quiescent current t j = 25 c 4.6 6 ma 6 ma ?i q quiescent current change v i = 27.3 to 38 v, i o = 500 ma 0.8 ma v i = 27.3 to 38 v, t j = 25 c 0.8 ma i o = 5 ma to 1 a 0.5 ma svr supply voltage rejection v i = 28 to 38 v, f = 120 hz, i o = 500 ma 54 db v d dropout voltage i o = 1 a, t j = 25 c 2 v en output noise voltage t a = 25 c, b = 10 hz to 100 khz 10 v/v o r o output resistance f = 1 khz 20 m i sc short circuit current v i = 35 v, t a = 25 c 0.2 a i scp short circuit peak current t j = 25 c 2.2 a ?v o /?t output voltage drift - 1.5 mv/c notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
electrical characteristics L78 14 / 54 docid2143 rev 34 refer to the test circuits, t j = 0 to 125 c, v i = 10 v, i o = 500 ma, c i = 0.33 f, c o = 0.1 f unless otherwise specified a table 10: electrical characteristics of L7805c symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 4.8 5 5.2 v v o output voltage i o = 5 ma to 1 a, v i = 7 to 18 v 4.75 5 5.25 v v o output voltage i o = 1 a, v i = 18 to 20v, t j = 25 c 4.75 5 5.25 v ?v o (1) line regulation v i = 7 to 25 v, t j = 25 c 3 100 mv v i = 8 to 12 v, t j = 25 c 1 50 ?v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25 c 100 mv i o = 250 to 750 ma, t j = 25 c 50 i d quiescent current t j = 25 c 8 ma ?i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = 7 to 23 v 0.8 ?v o /?t output voltage drift i o = 5 ma - 1.1 mv/c en output noise voltage b = 10 hz to 100 khz, t j = 25 c 40 v/v o svr supply voltage rejection v i = 8 to 18 v, f = 120 hz 62 db v d dropout voltage i o = 1 a, t j = 25 c 2 v r o output resistance f = 1 khz 17 m? i sc short circuit current v i = 35 v, t j = 25 c 0.75 a i scp short circuit peak current t j = 25 c 2.2 a notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
L78 electrical characteristics docid2143 rev 34 15 / 54 refer to the test circuits, t j = 0 to 125 c, v i = 11 v, i o = 500 ma, c i = 0.33 f, c o = 0.1 f unless otherwise specified a table 11: electrical characteristics of L7806c symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 5.75 6 6.25 v v o output voltage i o = 5 ma to 1 a, v i = 8 to 19 v 5.7 6 6.3 v v o output voltage i o = 1 a, v i = 19 to 21 v, t j = 25 c 5.7 6 6.3 v ?v o (1) line regulation v i = 8 to 25 v, t j = 25 c 120 mv v i = 9 to 13 v, t j = 25 c 60 ?v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25 c 120 mv i o = 250 to 750 ma, t j = 25 c 60 i d quiescent current t j = 25 c 8 ma di d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = 8 to 24 v 1.3 ?v o /?t output voltage drift i o = 5 ma - 0.8 mv/c en output noise voltage b = 10 hz to 100 khz, t j = 25 c 45 v/v o svr supply voltage rejection v i = 9 to 19 v, f = 120 hz 59 db v d dropout voltage i o = 1 a, t j = 25 c 2 v r o output resistance f = 1 khz 19 m? i sc short circuit current v i = 35 v, t j = 25 c 0.55 a i scp short circuit peak current t j = 25 c 2.2 a notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
electrical characteristics L78 16 / 54 docid2143 rev 34 refer to the test circuits, t j = 0 to 125 c, v i = 14 v, i o = 500 ma, c i = 0.33 f, c o = 0.1 f unless otherwise specified a table 12: electrical characteristics of L7808c symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 7.7 8 8.3 v v o output voltage i o = 5 ma to 1 a, v i = 10.5 to 21 v 7.6 8 8.4 v v o output voltage i o = 1 a, v i = 21 to 25 v, t j = 25 c 7.6 8 8.4 v ?v o (1) line regulation v i = 10.5 to 25 v, t j = 25 c 160 mv v i = 11 to 17 v, t j = 25 c 80 ?v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25 c 160 mv i o = 250 to 750 ma, t j = 25 c 80 i d quiescent current t j = 25 c 8 ma ?i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = 10.5 to 25 v 1 ?v o /?t output voltage drift i o = 5 ma - 0.8 mv/c en output noise voltage b = 10 hz to 100 khz, t j = 25 c 52 v/v o svr supply voltage rejection v i = 11.5 to 21.5 v, f = 120 hz 56 db v d dropout voltage i o = 1 a, t j = 25 c 2 v r o output resistance f = 1 khz 16 m? i sc short circuit current v i = 35 v, t j = 25 c 0.45 a i scp short circuit peak current t j = 25 c 2.2 a notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
L78 electrical characteristics docid2143 rev 34 17 / 54 refer to the test circuits, t j = 0 to 125 c, v i = 14.5 v, i o = 500 ma, c i = 0.33 f, c o = 0.1 f unless otherwise specified a table 13: electrical characteristics of L7885c symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 8.2 8.5 8.8 v v o output voltage i o = 5 ma to 1 a, v i = 11 to 21.5 v 8.1 8.5 8.9 v v o output voltage i o = 1 a, v i = 21.5 to 26 v, t j = 25 c 8.1 8.5 8.9 v ?v o (1) line regulation v i = 11 to 27 v, t j = 25 c 160 mv v i = 11.5 to 17.5 v, t j = 25 c 80 ?v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25 c 160 mv i o = 250 to 750 ma, t j = 25 c 80 i d quiescent current t j = 25 c 8 ma ?i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = 11 to 26 v 1 ?v o /?t output voltage drift i o = 5 ma - 0.8 mv/c en output noise voltage b = 10 hz to 100 khz, t j = 25 c 55 v/v o svr supply voltage rejection v i = 12 to 22 v, f = 120 hz 56 db v d dropout voltage i o = 1 a, t j = 25 c 2 v r o output resistance f = 1 khz 16 m? i sc short circuit current v i = 35 v, t j = 25 c 0.45 a i scp short circuit peak current t j = 25 c 2.2 a notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
electrical characteristics L78 18 / 54 docid2143 rev 34 refer to the test circuits, t j = 0 to 125 c, v i = 15 v, i o = 500 ma, c i = 0.33 f, c o = 0.1 f unless otherwise specified a table 14: electrical characteristics of L7809c symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 8.64 9 9.36 v v o output voltage i o = 5 ma to 1 a, v i = 11.5 to 22 v 8.55 9 9.45 v v o output voltage i o = 1 a, v i = 22 to 26 v, t j = 25 c 8.55 9 9.45 v ?v o (1) line regulation v i = 11.5 to 26 v, t j = 25 c 180 mv v i = 12 to 18 v, t j = 25 c 90 ?v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25 c 180 mv i o = 250 to 750 ma, t j = 25 c 90 i d quiescent current t j = 25 c 8 ma ?i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = 11.5 to 26 v 1 ?v o /?t output voltage drift i o = 5 ma - 1 mv/c en output noise voltage b = 10 hz to 100 khz, t j = 25 c 70 v/v o svr supply voltage rejection v i = 12 to 23 v, f = 120 hz 55 db v d dropout voltage i o = 1 a, t j = 25 c 2 v r o output resistance f = 1 khz 17 m? i sc short circuit current v i = 35 v, t j = 25 c 0.40 a i scp short circuit peak current t j = 25 c 2.2 a notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
L78 electrical characteristics docid2143 rev 34 19 / 54 refer to the test circuits, t j = 0 to 125 c, v i = 19 v, i o = 500 ma, c i = 0.33 f, c o = 0.1 f unless otherwise specified a table 15: electrical characteristics of L7812c symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 11 .5 12 12.5 v v o output voltage i o = 5 ma to 1 a, v i = 14.5 to 25 v 11.4 12 12.6 v v o output voltage i o = 1 a, v i = 25 to 27 v, t j = 25 c 11.4 12 12.6 v ?v o (1) line regulation v i = 14.5 to 30 v, t j = 25 c 240 mv v i = 16 to 22 v, t j = 25 c 120 ?v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25 c 240 mv i o = 250 to 750 ma, t j = 25 c 120 i d quiescent current t j = 25 c 8 ma ?i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = 14.5 to 30 v 1 ?v o /?t output voltage drift i o = 5 ma - 1 mv/c en output noise voltage b = 10 hz to 100 khz, t j = 25 c 75 v/v o svr supply voltage rejection v i = 15 to 25 v, f = 120 hz 55 db v d dropout voltage i o = 1 a, t j = 25 c 2 v r o output resistance f = 1 khz 18 m? i sc short circuit current v i = 35 v, t j = 25 c 0.35 a i scp short circuit peak current t j = 25 c 2.2 a notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
electrical characteristics L78 20 / 54 docid2143 rev 34 refer to the test circuits, t j = 0 to 125 c, v i = 23 v, i o = 500 ma, c i = 0.33 f, c o = 0.1 f unless otherwise specified a table 16: electrical characteristics of L7815c symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 14.4 15 15.6 v v o output voltage i o = 5 ma to 1 a, v i = 17.5 to 28 v 14.25 15 15.75 v v o output voltage i o = 1 a, v i = 28 to 30 v, t j = 25 c 14.25 15 15.75 v ?v o (1) line regulation v i = 17.5 to 30 v, t j = 25 c 300 mv v i = 20 to 26 v, t j = 25 c 150 ?v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25 c 300 mv i o = 250 to 750 ma, t j = 25 c 150 i d quiescent current t j = 25 c 8 ma ?i d quiescent current change i o = 5 ma to 1a 0.5 ma v i = 17.5 to 30 v 1 ?v o /?t output voltage drift i o = 5 ma - 1 mv/c en output noise voltage b = 10 hz to 100khz, t j = 25 c 90 v/v o svr supply voltage rejection v i = 18.5 to 28.5 v, f = 120 hz 54 db v d dropout voltage i o = 1 a, t j = 25 c 2 v r o output resistance f = 1 khz 19 m? i sc short circuit current v i = 35 v, t j = 25 c 0.23 a i scp short circuit peak current t j = 25 c 2.2 a notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
L78 electrical characteristics docid2143 rev 34 21 / 54 refer to the test circuits, t j = 0 to 125 c, v i = 26 v, i o = 500 ma, c i = 0.33 f, c o = 0.1 f unless otherwise specified a table 17: electrical characteristics of L7818c symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 17.3 18 18.7 v v o output voltage i o = 5 ma to 1 a, v i = 21 to 31 v 17.1 18 18.9 v v o output voltage i o = 1 a, v i = 31 to 33 v, t j = 25 c 17.1 18 18.9 v ?v o (1) line regulation v i = 21 to 33 v, t j = 25 c 360 mv v i = 24 to 30 v, t j = 25 c 180 ?v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25 c 360 mv i o = 250 to 750 ma, t j = 25 c 180 i d quiescent current t j = 25 c 8 ma ?i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = 21 to 33 v 1 ?v o /?t output voltage drift i o = 5 ma - 1 mv/c en output noise voltage b = 10 hz to 100 khz, t j = 25 c 110 v/v o svr supply voltage rejection v i = 22 to 32 v, f = 120 hz 53 db v d dropout voltage i o = 1 a, t j = 25 c 2 v r o output resistance f = 1 khz 22 m? i sc short circuit current v i = 35 v, t j = 25 c 0.20 a i scp short circuit peak current t j = 25 c 2.1 a notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
electrical characteristics L78 22 / 54 docid2143 rev 34 refer to the test circuits, t j = 0 to 125 c, v i = 33 v, i o = 500 ma, c i = 0.33 f, c o = 0.1 f unless otherwise specified a table 18: electrical characteristics of L7824c symbol parameter test conditions min. typ. max. unit v o output voltage t j = 25 c 23 24 25 v v o output voltage i o = 5 ma to 1 a, v i = 27 to 37 v 22.8 24 25.2 v v o output voltage i o = 1 a, v i = 37 to 38 v, t j = 25 c 22.8 24 25.2 v ?v o (1) line regulation v i = 27 to 38 v, t j = 25 c 480 mv v i = 30 to 36 v, t j = 25 c 240 ?v o (1) load regulation i o = 5 ma to 1.5 a, t j = 25 c 480 mv i o = 250 to 750 ma, t j = 25 c 240 i d quiescent current t j = 25 c 8 ma ?i d quiescent current change i o = 5 ma to 1 a 0.5 ma v i = 27 to 38 v 1 ?v o /?t output voltage drift i o = 5 ma - 1.5 mv/c en output noise voltage b = 10 hz to 100 khz, t j = 25 c 170 v/v o svr supply voltage rejection v i = 28 to 38 v, f = 120 hz 50 db v d dropout voltage i o = 1 a, t j = 25 c 2 v r o output resistance f = 1 khz 28 m? i sc short circuit current v i = 35 v, t j = 25 c 0.15 a i scp short circuit peak current t j = 25 c 2.1 a notes: (1) load and line regulation are specified at constant junction temperature. changes in v o due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. a minimum load current for regulation is 5 ma.
L78 application information docid2143 rev 34 23 / 54 6 application information 6.1 design consideration the L78 series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short - circuit protection that limits the maximum current the circuit will pass, and output transistor safe - area compensation that reduces the output short - circuit current as the voltage across the pass transistor is increased. in many low current applications, compensation capacitors are not required. however, it is recommended that the regulator input be bypassed with capacitor if the regulator is connected to the power supply filter with long lengths, or if the output load capacitance is large. a n input bypass capacitor should be selected to provide good high frequency characteristics to insure stable operation under all load conditions. a 0.33 f or larger tantalum, mylar or other capacitor having low internal impedance at high frequencies should be chosen. the bypass capacitor should be mounted with the shortest possible leads directly across the regulators input terminals. normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead. the addition of an operational amplifier allows adjustment to higher or intermediate values while retaining regulation characteristics. the minimum voltage obtained with the arrangement is 2 v greater than the regulator voltage. the circuit of figure 13: "high current voltage regulator" can be modified to provide supply protection against short circuit by adding a short circuit sense resistor, rsc, and an additional pnp transistor. the current sen sing pnp must be able to handle the short circuit current of the three terminal regulator therefore a four ampere plastic power transistor is specified. figure 8 : fixed output regulator 1. although no output capacitor is need for st ability, it does improve transient response. 2. required if regulator is located an appreciable distance from power supply filter.
application information L78 24 / 54 docid2143 rev 34 figure 9 : current regulator figure 10 : circuit for increasing output voltage figure 11 : adjustable output regulator (7 to 30 v)
L78 application information docid2143 rev 34 25 / 54 figure 12 : 0.5 to 10 v regulator figure 13 : high current voltage regulator figure 14 : high outp ut current with short circuit protection
application information L78 26 / 54 docid2143 rev 34 figure 15 : tracking voltage regulator figure 16 : split power supply ( 15 v - 1 a) * against potential latch - up problems.
L78 application information docid2143 rev 34 27 / 54 figure 17 : negative output voltage circuit figure 18 : switching regulator figure 19 : high input voltage circuit (configuration 1)
application information L78 28 / 54 docid2143 rev 34 figure 20 : high input voltage circuit (configuration 2) figure 21 : high input and output voltage figure 22 : reducing power dissipation with dropping resistor
L78 application information docid2143 rev 34 29 / 54 figure 23 : remote shutdown figure 24 : power am modulator (unity voltage gain, io 0.5) the circuit performs well up to 100 khz.
application information L78 30 / 54 docid2143 rev 34 figure 25 : adjustable output voltage with temperature compensation q 2 is connected as a diode in order to compensate the variation of the q 1 v be with the temperature. c allows a slow rise time of the v o . figure 26 : light controllers (vo(min) = vxx + vbe) figure 27 : prote ction against input short - circuit with high capacitance loads application with high capacitance loads and an output voltage greater than 6 volts need an external diode (see figure 22: "reducing power dissipation with dropping resistor" ) to protect the device against input short circuit. in this case the input voltage falls rapidly while the output voltage decrease slowly. the capacitance discharges by means of the base - emitter junction of the series pass transistor in the regulator. if the energy is sufficiently high, the transistor may be destroyed. the external diode by - passes the current from the ic to ground.
L78 typical performance docid2143 rev 34 31 / 54 7 typical performance figur e 28 : dropout voltage vs junction temperature figure 29 : peak output current vs input/output differential voltage figure 30 : supply voltage rejection vs frequency figure 31 : output voltage vs junction temperature
typical performance L78 32 / 54 docid2143 rev 34 figure 32 : output impedance vs frequency figure 33 : quiescent current vs junction temp. figure 34 : load transient response figure 35 : line transient response figure 36 : quiescent current vs. input voltage
L78 package information docid2143 rev 34 33 / 54 8 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? speci fications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark.
package information L78 34 / 54 docid2143 rev 34 8.1 to - 220 (dual gauge) package information figure 37 : to - 220 (dual gauge) package outline
L78 package information docid2143 rev 34 35 / 54 table 19: to - 220 (dual gauge) mechanical data dim. mm min. typ. max. a 4.40 4.60 b 0.61 0.88 b1 1.14 1.70 c 0.48 0.70 d 15.25 15.75 d1 1.27 e 10 10.40 e 2.40 2.70 e1 4.95 5.15 f 1.23 1.32 h1 6.20 6.60 j1 2.40 2.72 l 13 14 l1 3.50 3.93 l20 16.40 l30 28.90 ? p 3.75 3.85 q 2.65 2.95
package information L78 36 / 54 docid2143 rev 34 8.2 to - 220 (single gauge) package information figure 38 : to - 220 (single gauge) package outline
L78 package information docid2143 rev 34 37 / 54 table 20: to - 220 (single gauge) mechanical data dim. mm min. typ. max. a 4.40 4.60 b 0.61 0.88 b1 1.14 1.70 c 0.48 0.70 d 15.25 15.75 e 10.00 10.40 e 2.40 2.70 e1 4.95 5.15 f 0.51 0.60 h1 6.20 6.60 j1 2.40 2.72 l 13.00 14.00 l1 3.50 3.93 l20 16.40 l30 28.90 ? p 3.75 3.85 q 2.65 2.95
package information L78 38 / 54 docid2143 rev 34 8.3 to - 220fp package information figure 39 : to - 220fp package outline
L78 package information docid2143 rev 34 39 / 54 table 21: to - 220fp package mechanical data dim. mm min. typ. max. a 4.4 4.6 b 2.5 2.7 d 2.5 2.75 e 0.45 0.7 f 0.75 1 f1 1.15 1.70 f2 1.15 1.70 g 4.95 5.2 g1 2.4 2.7 h 10 10.4 l2 16 l3 28.6 30.6 l4 9.8 10.6 l5 2.9 3.6 l6 15.9 16.4 l7 9 9.3 dia 3 3.2
package information L78 40 / 54 docid2143 rev 34 8.4 to - 220 packing information figure 4 0 : tube for to - 220 (dual gauge) (mm.) figure 41 : tube for to - 220 (single gauge) (mm.)
L78 package infor mation docid2143 rev 34 41 / 54 8.5 dpak package information figure 42 : dpak package outline 0068772_a_21
package information L78 42 / 54 docid2143 rev 34 table 22: dpak mechanical data dim. mm min. typ. max. a 2.20 2.40 a1 0.90 1.10 a2 0.03 0.23 b 0.64 0.90 b4 5.20 5.40 c 0.45 0.60 c2 0.48 0.60 d 6.00 6.20 d1 5.10 e 6.40 6.60 e1 4.70 e 2.28 e1 4.40 4.60 h 9.35 10.10 l 1.00 1.50 (l1) 2.80 l2 0.80 l4 0.60 1.00 r 0.20 v2 0 8
L78 package information docid2143 rev 34 43 / 54 figure 43 : dpak recommended footprint (dimensions are in mm)
package information L78 44 / 54 docid2143 rev 34 8.6 d2pak (smd 2l std - st) type a package information figure 44 : d2pak (smd 2l std - st) type a package outline
L78 package information docid2143 rev 34 45 / 54 table 23: d2pak (smd 2l std - st) mechanical data dim. mm min. typ. max. a 4.40 4.60 a1 0.03 0.23 b 0.70 0.93 b2 1.14 1.70 c 0.45 0.60 c2 1.23 1.36 d 8.95 9.35 d1 7.50 7.75 8.00 d2 1.10 1.30 1.50 e 10 10.40 e1 8.50 8.70 8.90 e2 6.85 7.05 7.25 e 2.54 e1 4.88 5.28 h 15 15.85 j1 2.49 2.69 l 2.29 2.79 l1 1.27 1.40 l2 1.30 1.75 r 0.4 v2 0 8
package information L78 46 / 54 docid2143 rev 34 8.7 d2pak (smd 2l wooseok - subcon.) package information figure 45 : d2pak (smd 2l wooseok - subcon.) package outline
L78 package information docid2143 rev 34 47 / 54 table 24: d2pak (smd 2l wooseok - subcon.) mechanical data dim. mm min. typ. max. a 4.30 4.70 a1 0 0.20 b 0.70 0.90 b2 1.17 1.37 c 0.45 0.50 0.60 c2 1.25 1.30 1.40 d 9 9.20 9.40 d1 7.50 e 9.80 10.20 e1 7.50 e 2.54 e1 5.08 h 15 15.30 15.60 j1 2.20 2.60 l 1.79 2.79 l1 1 1.40 l2 1.20 1.60 r 0.30 v2 0 3
package information L78 48 / 54 docid2143 rev 34 figure 46 : d2pak (smd 2l wooseok - subcon.) recommended footprint
L78 package information docid2143 rev 34 49 / 54 8.8 d2pak and dpak packing information figure 47 : tape outline
package information L78 50 / 54 docid2143 rev 34 figure 48 : reel outline table 25: d2pak tape and reel mechanical data tape reel dim. mm dim. mm min. max. min. max. a0 10.5 10.7 a 330 b0 15.7 15.9 b 1.5 d 1.5 1.6 c 12.8 13.2 d1 1.59 1.61 d 20.2 e 1.65 1.85 g 24.4 26.4 f 11.4 11.6 n 100 k0 4.8 5.0 t 30.4 p0 3.9 4.1 p1 11.9 12.1 base quantity 1000 p2 1.9 2.1 bulk quantity 1000 r 50 t 0.25 0.35 w 23.7 24.3
L78 package information docid2143 rev 34 51 / 54 table 26: dpak tape and reel mechanical data tape reel dim. mm dim. mm min. max. min. max. a0 6.8 7 a 330 b0 10.4 10.6 b 1.5 b1 12.1 c 12.8 13.2 d 1.5 1.6 d 20.2 d1 1.5 g 16.4 18.4 e 1.65 1.85 n 50 f 7.4 7.6 t 22.4 k0 2.55 2.75 p0 3.9 4.1 base qty. 2500 p1 7.9 8.1 bulk qty. 2500 p2 1.9 2.1 r 40 t 0.25 0.35 w 15.7 16.3
ordering information L78 52 / 54 docid2143 rev 34 9 ordering information table 27: order codes part number order codes to - 220 (single gauge) to - 220 (dual gauge) dpak d2pak to - 220fp output voltages L7805c L7805cv L7805cv - dg L7805cdt - tr L7805cd2t - tr L7805cp 5 v L7805ab L7805abv L7805abv - dg L7805abd2t - tr L7805abp 5 v L7805ac L7805acv L7805acv - dg L7805acd2t - tr L7805acp 5 v L7806c L7806cv L7806cv - dg L7806cd2t - tr 6 v L7806ab L7806abv L7806abv - dg L7806abd2t - tr 6 v L7806ac L7806acv L7806acv - dg 6 v L7808c L7808cv L7808cv - dg L7808cd2t - tr 8 v L7808ab L7808abv L7808abv - dg L7808abd2t - tr 8 v L7808ac L7808acv L7808acv - dg 8 v L7885c L7885cv 8.5 v L7809c L7809cv L7809cv - dg L7809cd2t - tr L7809cp 9 v L7809ab L7809abv L7809abv - dg L7809abd2t - tr 9 v L7809ac L7809acv 9 v L7812c L7812cv L7812cv - dg L7812cd2t - tr L7812cp 12 v L7812ab L7812abv L7812abv - dg L7812abd2t - tr 12 v L7812ac L7812acv L7812acv - dg L7812acd2t - tr 12 v L7815c L7815cv L7815cv - dg L7815cd2t - tr L7815cp 15 v L7815ab L7815abv L7815abv - dg L7815abd2t - tr 15 v L7815ac L7815acv L7815acv - dg L7815acd2t - tr 15 v L7818c L7818cv L7818cv - dg 18 v L7824c L7824cv L7824cv - dg L7824cd2t - tr L7824cp 24 v L7824ab L7824abv L7824abv - dg 24 v L7824ac L7824acv L7824acv - dg 24 v
L78 revision history docid2143 rev 34 53 / 54 10 revision history table 28: document revision history date revision changes 21 - jun - 2004 12 document updating. 03 - aug - 2006 13 order codes has been updated and new template. 19 - jan - 2007 14 d2pak mechanical data has been updated and add footprint data. 31 - may - 2007 15 order codes has been updated. 29 - aug - 2007 16 added table 1 in cover page. 11 - dec - 2007 17 modified: table 27. 06 - feb - 2008 18 added: to - 220 mechanical data figure 38 on page 38 , figure 39 on page 39, and table 23 on page 37. modified: table 27 on page 58. 18 - mar - 2008 19 added: table 29: dpak mechanical data on page 50, table 30: tape and reel dpak mechanical data on page 52. modified: table 27 on page 58. 26 - jan - 2010 20 modified table 1 on page 1 and table 23 on page 37, added: figure 38 on page 38 and figure 39 on page 39, figure 40 on page 45 and figure 41 on page 45. 04 - mar - 2010 21 added notes figure 38 on page 38. 08 - sep - 2010 22 modified table 27 on page 58. 23 - nov - 2010 23 added: tj = 25 c test condition in dvo on table 3, 4, 5, 6, 7, 8 and table 9. 16 - sep - 2011 24 modified title on page 1. 30 - nov - 2011 25 added: order codes L7805cv - dg, L7806cv - dg, L7808abv - dg, L7812cv - dg and L7815cv - dg table 27 on page 58. 08 - feb - 2012 26 added: order codes L7805acv - dg, L7805abv - dg, L7806abv - dg, L7808cv - dg, L7809cv - dg, L7812acv - dg, L7818cv - dg, L7824cv - dg table 27 on page 58. 27 - mar - 2012 27 added: order codes L7812abv - dg, L7815abv - dg table 27 on page 58. 27 - apr - 2012 28 modified: vi = 10.4 to 23 v ==> vi = 11.4 to 23 v test conditon value line regulation table 6 on page 13. 10 - may - 2012 29 added: order codes L7806acv - dg, L7808acv - dg, L7815acv - dg, L7824abv - dg and L7824acv - dg table 27 on page 58. 19 - sep - 2012 30 modified load regulation units from v to mv in table 3 to table 9. 12 - mar - 2013 31 modified: vo output voltage at 25 c min. value 14.4 v table 16 on page 23. 04 - ma r - 2014 32 part numbers L78xx, L78xxc, L78xxab, L78xxac changed to L78. removed to - 3 package. updated the description in cover page, section 2: pin configuration, section 3: maximum ratings, section 4: test circuits, section 5: electrical characteristics, s ection 6: application information, section 8: package information and table 27: order codes. added section 9: packaging mechanical data. minor text changes. 26 - feb - 2016 33 updated section 8: package information . minor text changes. 28 - nov - 2016 34 updated section 9: "ordering information" . minor text changes.
L78 54 / 54 docid2143 rev 34 important notice C please read carefully stmicroelectronics nv and its subsidiaries (st) reserve the right to make changes, corrections, enhancements, modifications , and improvements to st products and/or to this document at any time without notice. purchasers should obtain the latest relevant information on st products before placing orders. st products are sold pursuant to sts terms and conditions of sale in place at the time of or der acknowledgement. purchasers are solely responsible for the choice, selection, and use of st products and st assumes no liability for application assistance or the design of purchasers products. no license, express or implied, to any intellectual property right is granted by st herein. resale of st products with provisions different from the information s et forth herein shall void any warranty granted by st for such product. st and the st logo are trademarks of st. all other product or service names are the property of their respective owners. information in this document supersedes and replaces information previously supplied in any prior versions of this document. ? 2016 stmicroelectronics C all rights reserved

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