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september 2011 doc id 022166 rev 2 1/16 16 LDCL015XX LDCL015XX33 150 ma capless ultra low drop linear regulator ics features no input or output capacitor required input voltage from 1.8 v to 5.5 v very low drop: 50 mv at 100 ma load 2% output voltage accuracy output voltage tolerance: 3% low noise 150 ma guaranteed output current available in fixed and adjustable output voltages, from 0.8 v in 100 mv steps internal current and thermal limit operating temperature range: - 40 c to 125 c sot23 5-lead package applications space-sensitive applications battery-powered equipment cordless and mobile phones industrial and medical equipment portable equipment description the ldcl015 provides 150 ma of maximum current from an input voltage ranging from 1.8 v to 5.5 v, with a typical dropout voltage of 50 mv. it is stable with no input or output capacitor. low quiescent current, low noise and capless operation make it suitable for low power battery- powered applications and allows the reduction of board size. typical power supply rejection ratio is 52 db at low frequencies, and starts to roll off at 10 khz. the enable logic control function puts the ldcl015 in shutdown mode, reducing the total current consumption to less than 1 a. the device also includes shor t-circuit constant current limit and thermal protection. typical applications are mobile phones, personal digital assistants and similar battery-powered systems. sot23-5l table 1. device summary part numbers markings order codes output voltages LDCL015XX33 cl33 ldcl015m33r 3.3 v LDCL015XX clad ldcl015mr adjustable from 0.8 www.st.com
contents LDCL015XX, LDCL015XX33 2/16 doc id 022166 rev 2 contents 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 7 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7.1 general operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7.2 thermal and short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7.3 output voltage setting for adj version . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7.4 enable pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
LDCL015XX, LDCL015XX33 block diagram doc id 022166 rev 2 3/16 1 block diagram figure 1. ldcl015 block diagram
pin configuration LDCL015XX, LDCL015XX33 4/16 doc id 022166 rev 2 2 pin configuration figure 2. pin connections (top view) table 2. pin description pin n symbol name and function 1v in input voltage 2 gnd ground 3 en enable pin. the device is in off state when this pin is pulled low 4 adj/nc feedback pin for adjustable version.not connected on fixed version 5v out output voltage
LDCL015XX, LDCL015XX33 typical application doc id 022166 rev 2 5/16 3 typical application figure 3. typical application schematic - adjustable version (LDCL015XX) figure 4. typical application schematic - fixed v out version (LDCL015XX33) note: 1 r1 and r2 are calculated according to the following formula: r1 = r2 x (v out /v adj -1). 2c in and c out are optional. am09 3 60v1 out gnd in en adj on off cin r1 r2 cout ldcl015 am09 3 61v1 out gnd in en cout on off cin cout ldcl015
maximum ratings LDCL015XX, LDCL015XX33 6/16 doc id 022166 rev 2 4 maximum ratings note: absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. table 3. absolute maximum ratings symbol parameter value unit v in input supply voltage -0.3 to +7 v v out output voltage -0.3 to v in +0.3 v i out output current internally limited a en, adj enable and feedback pin voltage -0.3 to +v in +0.3 v p d power dissipation internally limited w esd machine model 300 v human body model 3000 t j-op operating junction temperature -40 to 125 c t j-max maximum junction temperature 150 c t stg storage temperature -65 to 150 c table 4. thermal data symbol parameter value unit r thjc thermal resistance junction-case 255 c/w r thja thermal resistance j unction-ambient 81 c/w
LDCL015XX, LDCL015XX33 electrical characteristics doc id 022166 rev 2 7/16 5 electrical characteristics t j = 25 c, v in = v out + 0.5 v; v out = 1.6 v; c in = c out = 100 nf; i out =1 ma; v en =v in . table 5. electrical characteristics symbol parameter test conditions min. typ. max. unit v in operating input voltage range 1.8 5.5 v v out (1) output voltage accuracy t j =25c -2.0 2.0 % -40c typical performance characteristics LDCL015XX, LDCL015XX33 8/16 doc id 022166 rev 2 6 typical performance characteristics figure 5. output voltage vs. temperature (v in = 3.8 v) figure 6. output voltage vs. temperature (v in = 2 v) figure 7. output voltage vs. temperature (i out = 150 ma) figure 8. output voltage vs. temperature (v out = 0.8 v) figure 9. output voltage vs. input voltage (v out = 0.8 v) figure 10. output voltage vs. input voltage (v out = 3.3 v) 3.16 3.18 3.2 3.22 3.24 3.26 3.28 3.3 3.32 3.34 3.36 3.38 3.4 3.42 3.44 -50 -25 0 25 50 75 100 125 150 v out [v] t [c] v in = 3 . 8 v, i out = 1 ma v out = 3 . 3 v 0.74 0.75 0.76 0.77 0.78 0.79 0.8 0.81 0.82 0.83 0.84 0.85 0.86 -50 -25 0 25 50 75 100 125 150 v out [v] t [c] v in = 2 v, i out = 1 ma v out @0. 8 v 3.16 3.18 3.2 3.22 3.24 3.26 3.28 3.3 3.32 3.34 3.36 3.38 3.4 3.42 3.44 -50 -25 0 25 50 75 100 125 150 v out [v] t [c] v in = 3 . 8 v, i out = 150 ma v out = 3 . 3 v 0.74 0.75 0.76 0.77 0.78 0.79 0.8 0.81 0.82 0.83 0.84 0.85 0.86 -50 -25 0 25 50 75 100 125 150 v out [v] t [c] v in = 2 v, i out = 150 ma v out @0. 8 v 0 0.1 0.2 0. 3 0.4 0.5 0.6 0.7 0. 8 0.9 012 3 456 v out [v] v in [v] v en = v in ; v in = from 0 v to 5.5 v; i out = 1 ma; c in = c out = 0.1 f v out @0. 8 v 0 0.5 1 1.5 2 2.5 3 3 .5 012 3 456 v out [v] v in [v] v out = 3 . 3 v v en = v in ; v in = from 0 v to 5.5 v; i out = 1 ma; c in = c out = 0.1 f
LDCL015XX, LDCL015XX33 typical performance characteristics doc id 022166 rev 2 9/16 figure 11. dropout voltage vs. temperature figure 12. svr vs. frequency (v out = 0.8 v) figure 13. svr vs. frequency figure 14. noise voltage vs. c out figure 15. line transient (rising) v out = 3.3 v figure 16. line transient (falling) v out = 3.3 v v en = v cc = from 3.8 v to 5.5 v; i out = 1 ma; c in = 0.1 f; no c out v en = v cc = from 5.5 v to 3.8 v; i out = 1 ma; c in = 0.1 f; no c out 0 50 100 150 200 250 3 00 -75 -50 -25 0 25 50 75 100 125 150 vdropout [mv] t [c] v out = 3 . 3 v v en = v in ; i out = 150 ma c in = c out = 0.1 f, i out = 10 ma v out @0. 8 v 10 15 20 25 3 0 3 5 40 45 50 55 60 65 70 0.1 1 10 100 1000 s vr [db] f [khz] 10 15 20 25 3 0 3 5 40 45 50 55 60 65 70 0.1 1 10 100 1000 s vr [db] f [khz] c in = 0.1 f, no c out, i out =10 ma v out @0. 8 v 25 27 29 3 1 33 3 5 3 7 3 9 41 4 3 45 0 2000 4000 6000 8 000 10000 noi s e volta g e (mvrm s /v) c out (nf) v out = 1.5 v v out = 3.3 v v out = 3.3 v
typical performance characteristics LDCL015XX, LDCL015XX33 10/16 doc id 022166 rev 2 figure 17. line transient (rising) fi gure 18. line transient (falling) v en = v cc = from 3.8 v to 5.5 v; i out = 1 ma; c in = 0.1 f; c out = 1 f v en = v cc = from 5.5 v to 3.8 v; i out = 1 ma; c in = 0.1 f; c out = 1 f figure 19. load transient figure 20. load transient v out = 3.3 v v en = v in = 3.8 v; i out = from 1 to 150 ma c in = 0.1 f no c out v en = v in = 3.8 v; i out = from 1 to 150 ma c in = 0.1 f c out = 1 f v out = 3.3 v v out = 3.3 v v out = 3.3 v v out = 3.3 v
LDCL015XX, LDCL015XX33 application information doc id 022166 rev 2 11/16 7 application information 7.1 general operation the main feature of the ldcl015 is its capability to operate wit h or without input and output capacitors. to achieve this goal, the ldo architecture is based on a robust operational amplifier which has sufficient phase margin over all positions of the output capacitor pole. the ldcl015 can operate with a 100 nf output capacitor, but also without an output capacitor, showing in both configurations good supply voltage rejectio n, stability and dynamic performance. 7.2 thermal and short-circuit protection the ldcl015 is self-protected from short-circuit condition and overtemperature. when the output load is higher than that supported by the device, the output current is increased until the limit of 220 ma (typ) is reached, at which point the current is kept constant even when the load impedance is zero. thermal protection acts when the junction temperature reaches 170 c. at this point the ic is completely shut down. as soon as the junction temperature falls back below 150 c, the device begins operating again. to calculate the maximum power that the device can dissipate while keeping the junction temperature below the t j-op , the following formula is used: equation 1 p dmax = (125-t amb ) / r thja 7.3 output voltage setting for adj version in the adjustable version, the output voltage can be set from 0.8 v up to the input voltage, minus the voltage drop across the pass transistor (dropout voltage), by connecting a resistor divider between the adj pin and the output, thus allowing remote voltage sensing. the resistor divider should be selected using the following equation: equation 2 v out = v adj (1 + r1 / r2), with v adj = 0.8 v (typ.) it is recommended to use resistors with values in the range of 10 k to 50 k . lower values can also be suitable, but will increase current consumption. 7.4 enable pin the ldcl015 features an enable function. when the en voltage is higher than 2 v, the device is on; if it is lower than 0.8 v, the device is off. in shutdown mode, the current consumption is lower than 1 a. the en pin does not have an internal pull-up, which means that it cannot be left floating if it is not used.
package mechanical data LDCL015XX, LDCL015XX33 12/16 doc id 022166 rev 2 8 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark.
LDCL015XX, LDCL015XX33 package mechanical data doc id 022166 rev 2 13/16 dim. mm. mil s . min. typ. max. min. typ. max. a0. 9 0 1.45 3 5.4 57.1 a1 0.00 0.10 0.0 3 . 9 a2 0. 9 01. 3 0 3 5.4 51.2 b 0. 3 5 0.50 1 3 .7 1 9 .7 c0.0 9 0.20 3 .5 7. 8 d2. 8 0 3 .00 110.2 11 8 .1 e 1.50 1.75 5 9 .0 6 8 . 8 e0. 9 5 3 7.4 h 2.60 3 .00 102. 3 11 8 .1 l 0.10 0.60 3 . 9 2 3 .6 s ot2 3 -5l mechanical data 704 9 676d
package mechanical data LDCL015XX, LDCL015XX33 14/16 doc id 022166 rev 2 dim. mm. inch. min. typ. max. min. typ. max. a1 8 0 7.0 8 6 c 12. 8 1 3 .0 1 3 .2 0.504 0.512 0.51 9 d 20.2 0.7 9 5 n60 2. 3 62 t 14.4 0.567 ao 3 .1 33 .2 33 . 33 0.12 3 0.127 0.1 3 1 bo 3 .07 3 .17 3 .27 0.120 0.124 0.12 8 ko 1.27 1. 3 7 1.47 0.050 0.054 0.0.5 8 po 3 . 9 4.0 4.1 0.15 3 0.157 0.161 p 3 . 9 4.0 4.1 0.15 3 0.157 0.161 tape & reel s ot2 3 -xl mechanical data
LDCL015XX, LDCL015XX33 revision history doc id 022166 rev 2 15/16 9 revision history table 6. document revision history date revision changes 05-sep-2011 1 first release. 15-sep-2011 2 added part number LDCL015XX to document heading and ta b l e 1 . modified document title. removed section 8: other output volta ge versions of the ldcl015 available on request.
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