? 2004 california micro devices corp. all rights reserved. 01/14/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 1 cmpwr130 300ma smartor tm regulator with v aux switch features ? automatic detection of v cc input supply glitch-free output during supply transitions built-in hysteresis during supply selection 300ma output maximum load current overload current protection short circuit current protection operates from either v cc or v out 8-pin soic package lead-free version available applications pci adapter cards network interface cards (nics) dual power systems systems with standby capabilities product description the smartor tm cmpwr130 is a low dropout regula- tor that delivers up to 300ma of load current at a fixed 3.3v output. an internal threshold level (typ 4.1v) is used to prevent the regulator from being operated below dropout voltage. the device continuously moni- tors the input supply and will automatically disable the regulator when v cc falls below the threshold level. when the regulator is disabled, the drive control sig- nal (active low) is enabled, which allows an external pmos switch to power the load from an auxiliary 3.3v supply. when v cc is restored to a level above the select threshold, the control signal for the external pmos switch is disabled and the regulator is once again enabled. all the necessary control circuitry needed to provide a smooth and automatic transition between the supplies has been incorporated. this allows v cc to be dynami- cally switched without loss of output voltage. the cmpwr130 is housed in a 8-pin soic package and is available with optional lead-free finishing. simplified electrical schematic typical application circuit v out gnd v out cmpwr130 v cc 4 f 5v v cc c out + gnd 1 f c in + 3.3v 300ma drive v aux 3.3v mgsf1po2elt1 + v cc gnd v out - + enable - v ref 4.1v v deselect 3.3v drive 3.3v 300ma
? 2004 california micro devices corp. all rights reserved. 2 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 01/14/04 cmpwr130 pin descriptions pin(s) name description 1v cc v cc is the power source for the internal regulator and is monitored continuously by an internal controller circuit. whenever v cc exceeds v ccsel (4.30v typ), the internal regulator (300ma max) will be enabled and deliver a fixed 3.3v at v out . when v cc falls below v ccdes (4.10v typ) the regulator will be dis- abled. internal loading on this pin is typically 0.6ma when the regulator is enabled, which reduces to 0.2ma whenever the regulator is disabled. if v cc falls below the voltage on the v out pin the v cc loading will further reduce to only a few microamperes. during a v cc power up sequence, there will be an effec- tive step increase in v cc line current when the regulator is enabled. the amplitude of this step increase will depend on the dc load current and any necessary current required for charging/discharging the load capacitance. this line current transient will cause a voltage disturbance at the v cc pin. the magnitude of the disturbance will be directly proportional to the effective power supply source impedance being deliv- ered to the v cc input. to prevent chatter during select and deselect transitions, a built-in hysteresis voltage of 200mv has been incorporated. it is recommended that the power supply connected to the v cc input should have a source resistance of less than 0.25 ? to minimize the event of chatter during the enabling/disabling of the regulator. an input filter capacitor in close proximity to the v cc pin will reduce the effective source impedance and help minimize any disturbances. if the v cc pin is within a few inches of the main input filter, a capacitor may not be necessary. otherwise an input filter capacitor in the range of 1f to 10f will ensure ade- quate filtering. 2 - 3, 5 nc nc pins are electrically isolated from the internal circuitry. these pins can be connected to any external voltage level without impacting the device functionality. 4 gnd gnd is the negative reference for all voltages. the current that flows in the ground connection is very low (typically 550 a) and has minimal variation over all load conditions. 6 - 7 v out v out is the regulator output voltage connection used to power the load. an output capacitor of 4.7f is used to provide the necessary phase compensation, thereby preventing oscillation. the capacitor also helps to minimize the peak output disturbance during power supply changeover. when v cc falls below v out , then v out will be used to provide the necessary quiescent current for the internal reference circuits. this ensures excellent start-up characteristics for the regulator. 8 drive drive is an active low logic output intended to be used as the control signal for driving an external pfet whenever the regulator is disabled. this will allow the voltage at v out to be powered from an aux- iliary supply voltage (3.3v). the drive pin is pulled high to v cc whenever the regulator is enabled, this ensures the auxiliary remains isolated during normal regulator operation. the output current sinking abil- ity of this logic signal is equivalent to a 100 ? resistor. the current sourcing ability is equivalent to a 4k ? resistor. package / pinout diagram note: this drawing is not to scale. 8-pin soic 1 2 3 4 8 7 6 5 v cc nc nc gnd drive v out v out nc top view
? 2004 california micro devices corp. all rights reserved. 01/14/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 3 cmpwr130 ordering information note 1: parts are shipped in tape & reel form unless otherwise specified. specifications note 1: the power rating is based on a printed circuit board heat spreading capability equivalent to 2 square inches of copper c on- nected to the gnd pins. typical multi-layer boards using power plane construction will provide this heat spreading ability without the need for additional dedicated copper area. (please consult with factory for thermal evaluation assistance). part numbering information pins package standard finish lead-free finish ordering part number 1 part marking ordering part number 1 part marking 8 power soic cmpwr130s cmpwr130s CMPWR130R CMPWR130R absolute maximum ratings parameter rating units esd protection (hbm) + 2000 v pin input voltages v cc v out drive [gnd - 0.5] to +6.0 [gnd - 0.5] to +6.0 [gnd - 0.5] to [v cc + 0.5] v v v storage temperature range -40 to +150 c operating temperature range ambient junction 0 to +70 0 to +125 c c power dissipation (see note 1) 0.6 w standard operating conditions parameter valu e units v cc 5.0 + 0.5 v ambient operating temperature range 0 to +70 c load current 0 to 300 ma c ext 4.7 + 20% f
? 2004 california micro devices corp. all rights reserved. 4 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 01/14/04 cmpwr130 note 1: operating characteristics are over standard operating conditions unless otherwise specified. note 2: the hysteresis defines the maximum level of acceptable disturbance on v cc during switching. it is recommended that the v cc source impedance be kept below 0.25 ? to ensure the switching disturbance remains below the hysteresis during select/deselect transitions. an input capacitor may be required to help minimize the switching transient. note 3: ground pin current consists of controller current (0.15ma) and regulator current if enabled. the controller always draws 0.15ma from either v cc or v out , whichever is greater. all regulator current is supplied exclusively from v cc . at high load currents a small increase occurs due to current limit protection circuitry. electrical operating characteristics (see note 1) symbol parameter conditions min typ max units v out regulator output voltage 0ma < i load < 300ma 3.10 3.300 3.50 v v ccsel v cc select voltage regulator enabled 4.30 4.45 v v ccdes v cc deselect voltage regulator disabled 3.90 4.10 v v cchyst hysteresis voltage see note 2 0.20 v i sc short circuit output current v cc = 5v, v out = 0v 310 ma v r load load regulation v cc =5v, 30ma < i load < 300ma 50 mv v r line line regulation xx i load = 5ma; 4.5v < v cc < to 5.5v 50 mv i rcc v cc pin reverse leakage v out = 3.3v, v cc = 0v 2 50 a i cc quiescent supply current v cc > v ccsel , i load = 0ma v ccdes > v cc > v out v out > v cc 0.60 0.20 0.01 0.80 0.02 ma ma ma i gnd ground current (see note 3) v ccsel > v cc (regulator disabled) v cc = 5v, i load = 5ma v cc = 5v, i load = 300ma 0.20 0.60 0.70 0.40 0.80 1.40 ma ma ma r oh drive pull-up resistance r pullup to v cc , v cc > v ccsel 4.0 8.0 k ? r ol drive pull-down resistance r pulldown to gnd, v ccdes > v cc 0.1 0.4 k ?
? 2004 california micro devices corp. all rights reserved. 01/14/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 5 cmpwr130 performance information cmpwr130 typical dc characteristics (nominal conditions unless specified otherwise) 0 100 200 300 400 500 600 0 1.0 2.0 3.0 4.0 5.0 6.0 v cc (v) v aux = 3.3v v aux = 0v supply current (a) figure 1. supply current vs voltage (v aux = 3.3v) 520 540 560 580 600 620 640 660 0 100 200 300 load current (ma) ground current (a) figure 2. ground current vs output load figure 3. load regulation figure 4. line regulation 3.20 3.25 3.30 3.35 3.40 0 100 200 300 400 load current (ma) v out (v) 3.15 3.20 3.25 3.30 3.35 3.5 4.0 4.5 5.0 v cc (v) 5ma load 300ma load v out (v)
? 2004 california micro devices corp. all rights reserved. 6 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 01/14/04 cmpwr130 performance information (cont?d) cmpwr130 transient characteristics (nominal conditions unless specified otherwise) (supply source resistance set to 0.2 ? ) 3.06v drive (300ma load) v cc v out m 1ms 1v ch1 ch2 5v 2 ch3 1v tek run: 50ks/s sample ch2 figure 5. v cc cold start power up (v aux = 0v) figure 6. v cc complete power down (v aux = 0v) figure 8. v cc power down (v aux = 3.3v) figure 7. v cc power up (v aux = 3.3v) figure 10. line transient (1v pp ) step response figure 9. load transient (10% to 90%) step response 3.06v drive (300ma load) v cc v out m 1ms 1v 5v 2 ch3 ch1 ch2 1v 50ks/s tek 1 acqs ch2 2.32v v cc (offset = 4.2v) drive v out (offset = 3.3v) (300ma load) m 10? 100mv ch1 5v 3 1 ch3 2v 2.5ms/s tek 5 acqs ch3 2.1v v cc (offset = 4.2v) drive v out (offset = 3.3v) (300ma load) m 20? 100mv ch1 5v ch3 3 1 100mv teck run: 2.5ms/s sample ch3 ch2 2.32v load 275ma 25ma v out (offset = 3.3v) m 10? 100mv ch1 1 2 2v 5ms/s tek 3 acqs ch2 5v v cc v out (offset = 3.3v) m 100? 20mv ch2 ch1 500mv 500ks/s tek 2 acqs ch2 4.5v 5.5v 2
? 2004 california micro devices corp. all rights reserved. 01/14/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 7 cmpwr130 performance information (cont ? d) cmpwr130 typical thermal characteristics the overall junction to ambient thermal resistance ( ja ) for device power dissipation (p d ) consists prima- rily of two paths in series. the first path is the junction to the case ( jc ) which is defined by the package style, and the second path is case to ambient ( ca ) thermal resistance which is dependent on board layout. the final operating junction temperature for any set of con- ditions can be estimated by the following thermal equa- tion: t junc = t amb + p d ( jc ) + p d ( ca ) = t amb + p d ( ja ) the cmpwr130 uses a standard soic package. when this package is mounted on a double-sided printed circuit board with two square inches of copper allocated for "heat spreading", the resulting ja is 85 c/w. based on a maximum power dissipation of 0.51w (1.7v x 300ma) with an ambient of 70 c, the resulting junction temperature will be: t junc = t amb + p d ( ja ) = 70 c + 0.51w (85 c/w) = 70 c + 43 c = 113 c thermal characteristics were measured using a dou- ble-sided board with two square inches of copper area connected to the gnd pin for "heat spreading". measurements showing performance up to junction temperature of 125 c were performed under light load conditions (5ma). this allows the ambient temperature to be representative of the internal junction tempera- ture. note: the use of multi-layer board construction with separate ground and power planes will further enhance the overall thermal performance. in the event of no copper area being dedicated for heat spreading, a multi-layer board construction, using only the minimum size pad layout, will provide the cmpwr130 with an overall ja of 100 c/w which allows up to 550mw to be safely dissipated. figure 11. regulator v out vs t amb (300ma load) figure 12. select and deselect threshold vs t junc 25 35 45 55 65 75 ambient temperature ( ? c) 3.24 3.26 3.28 3.30 3.32 3.34 v out (v) 3.9 4.0 4.1 4.2 4.3 4.4 4.5 25 50 75 100 125 junction temperature ( c) v deselect v select threshold (v)
? 2004 california micro devices corp. all rights reserved. 8 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 01/14/04 cmpwr130 mechanical details soic-8 mechanical specifications dimensions for cmpwr130 devices packaged in 8-pin soic packages are presented below. for complete information on the soic-8 package, see the california micro devices soic package informa- tion document. * this is an approximate number which may vary. package dimensions for soic-8 package dimensions package soic pins 8 dimensions millimeters inches min max min max a 1.35 1.75 0.053 0.069 a 1 0.10 0.25 0.004 0.010 b 0.33 0.51 0.013 0.020 c 0.19 0.25 0.007 0.010 d 4.80 5.00 0.189 0.197 e 3.80 4.19 0.150 0.165 e 1.27 bsc 0.050 bsc h 5.80 6.20 0.228 0.244 l 0.40 1.27 0.016 0.050 # per tube 100 pieces* # per tape and reel 2500 pieces controlling dimension: inches mechanical package diagrams e d h top view l end view c e b a a 1 seating plane side view 1234 8765 pin 1 marking
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