? 2004 california micro devices corp. all rights reserved. 01/27/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 1 cmpwr330 400ma smartor tm regulator with v aux switch features ? continuous 3.3v output from three inputs complete power management solution v cc , v sby regulator supplies 400ma output built-in hysteresis when selecting input supplies integrated switch has very low r ds(on) resistance of 0.25 ? (typ) foldback current limiting protection thermal overload shutdown protection 8-pin power soic package lead-free version available applications pci adapter cards with wake-on-lan network interface cards (nics) multiple power systems systems with standby capabilities product description the cmpwr330 is a dual input regulator with a fully integrated v aux switch capable of delivering up to 400ma continuously at 3.3v. the input is taken from three independent voltage sources on a prioritized basis. power is always taken in priority using the order of v cc , v sby , and v aux . when v cc (5v) or v sby is present, the device auto- matically enables the regulator and produces a stable 3.3v output at v out . when only v aux (3.3v) is present, the device provides a low impedance direct connection (0.25 ? typ.) from v aux to v out . all the necessary control circuitry needed to provide a smooth and automatic transition between all three sup- plies has been incorporated. this allows the v cc input supply to be dynamically switched without loss of out- put voltage. the cmpwr330 is housed in an 8-pin soic package and is available with optional lead-free finishing. simplified electrical schematic typical application circuit + v sby gnd v out - + enable - controller a ux s w 3.3v 4.2v v deselect a ux s w 0.25 ? regulator amp v aux select (v cc /v sby ) v cc v ref v cc v sby 3.3v 400ma v aux v out gnd cmpwr330 v cc 10 f + - 5v v cc v aux 3.3v c ext + gnd 1 f + 3.3v/400ma v sby 5v 1 f + v sby gnd v out
? 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 01/27/04 cmpwr330 ordering information note 1: parts are shipped in tape & reel form unless otherwise specified. pin descriptions pin(s) name description 1v sby v sby is the standby input supply (5v), which is used to power the regulator whenever v cc is below the deselect level (4.2v). if the v sby connection is made within a few inches of the main input filter, a bypass capacitor may not be necessary. otherwise a bypass filter capacitor in the range of 1f to 10f will ensure adequate filtering. 2v cc v cc is a positive input supply for the voltage regulator. whenever this supply voltage exceeds the v ccsel level (4.4v), it will be given priority and be used to power the regulator output. if this supply voltage falls below the v ccdes level (4.2v) it will immediately be deselected and no longer provide power for the regulator output. an internal hysteresis voltage of 0.2v is used to prevent any chatter during selection and deselection of v cc . the effective source impedance of v cc should be kept below 0.3 ? to ensure changeover disturbances do not exceed the hysteresis level. if the connection to v cc is made within a few inches of the main input filter, a bypass capacitor may not be necessary. otherwise a bypass filter capacitor in the range of 1f to 10f will ensure ade- quate filtering. 3v out v out is the output voltage. power is provided from the regulator or via the low impedance auxiliary switch. this output requires a capacitance of 10f to ensure regulator stab ility and minimize the peak output disturbance during power supply changeover. 4v aux v aux is the auxiliary voltage power source. this supply is selected only when v cc falls below 4.2v and the v sby is not present. under these conditions an internal switch is enabled and provides a very low impedance connection directly between v aux and v out . 5-8 gnd the negative reference for all voltages. also functions as a thermal path for heat dissipation. package / pinout diagram note: this drawing is not to scale. 8-pin power soic 1 2 3 4 8 7 6 5 v sby v cc v out v aux gnd gnd gnd gnd top view 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 cmpwr330sa cmpwr330sa CMPWR330SF CMPWR330SF
? 2004 california micro devices corp. all rights reserved. 01/27/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 3 cmpwr330 specifications note 1: at rated load, the power dissipation will be 0.68w (1.7v x 0.4a). under these conditions, (in a 70c ambient), the therm al resistance from junction to ambient ( ja ) must not exceed 80c/w. this is typically achieved with 2 square inches of copper printed circuit board area connected to the gnd pins for heat spreading, or equivalent. absolute maximum ratings parameter rating units esd protection (hbm) + 2000 v pin input voltages v cc , v sby v aux [gnd - 0.5] to +6.0 [gnd - 0.5] to +4.0 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) internally limited w standard operating conditions parameter valu e units v cc , v sby 5.0 + 0.25 v v aux 3.3 + 0.3 v ambient operating temperature range 0 to +70 c load current 0 to 400 ma c ext 10 + 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 01/27/04 cmpwr330 specifications (cont?d) note 1: operating characteristics are over standard operating conditions unless otherwise specified. note 2: the disturbance on v cc during supply changeover should be kept below the hysteresis voltage to prevent any chatter. the source resistance on the v cc supply should be kept to less than 0.3 ohms to ensure precise switching. electrical operating characteristics (see note 1) symbol parameter conditions min typ max units v out regulator output voltage 0ma < i load < 400ma 3.135 3.300 3.465 v i lim regulator current limit v out > 1v 500 ma i s/c short circuit current v cc/sby = 5v, v out = 0v 150 ma v r load load regulation v cc = 5v, 5ma < i load < 400ma 20 mv v r line line regulation xx i load = 5ma; 4.5v < v in < to 5.5v 2 mv v ccsel v cc select voltage v sby or v aux present 4.40 4.60 v v ccdes v cc deselect voltage v sby or v aux present 4.00 4.20 v v hyst hysteresis voltage v sby or v aux present; see note 2 0.20 v r sw v aux switch resistance 0.25 0.40 ? i rcc i rsby i raux v cc reverse leakage v sby reverse leakage v aux reverse leakage one supply input taken to gnd while the others remain at nominal voltage. 5100 a i cc v cc supply current v cc > v ccsel , i load = 0ma 0.8 1.5 ma i sby v sby supply current v cc < v ccsel , i load = 0ma 0.8 1.5 ma i aux v aux supply current v aux is selected, i load = 0ma 0.20 0.30 ma i gnd ground current v aux is selected, (v cc/sby = 0v) v cc/sby = 5v, i load = 0ma v cc/sby = 5v, i load = 400ma 0.20 0.80 1.00 0.30 1.50 2.00 ma ma ma t disable t hyst shutdown temperature thermal hysteresis 160 20 c c
? 2004 california micro devices corp. all rights reserved. 01/27/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 5 cmpwr330 performance information cmpwr330 typical dc characteristics (nominal conditions unless specified otherwise) figure 1. v cc supply current vs voltage figure 2. v sby supply current vs voltage figure 3. v aux supply current vs voltage figure 4. gr ound current vs output load 0123456 v cc input voltage (v) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 supply current (ma) 0123456 v sby input voltage (v) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 supply current (ma) 3.5 4 4.5 5 5.5 6 line voltage (v) 3.0 3.1 3.2 3.3 3.4 regulator output voltage (v) 3.5 4 4.5 5 5.5 6 line voltage (v) 3.0 3.1 3.2 3.3 3.4 regulator output voltage (v) 0 100 200 300 400 load current (ma) 0.6 0.7 0.8 0.9 1.0 1.1 1.2 ground current (ma) 01234 v aux input voltage (v) 0.0 0.1 0.2 0.3 0.4 0.5 supply current (ma)
? 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 01/27/04 cmpwr330 performance information (cont ? d) cmpwr330 typical dc characteristics (cont ? d, nominal conditions unless specified otherwise) figure 7. load regulation (5v supply) figure 8. foldback current limit protection figure 9. regulator dropout characteristics figure 10. switch resistance vs v aux supply 0 100 200 300 400 500 600 load current (ma) 3.15 3.20 3.25 3.30 3.35 3.40 3.45 regulator output voltage (v) 0 100 200 300 400 load current (ma) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 dropout voltage (v) 3.0 3.1 3.2 3.3 3.4 3.5 3.6 v aux input voltage (v) 0.20 0.25 0.30 0.35 0.40 on resisitance ( ? ) 0 100 200 300 400 500 600 output current (ma) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 regulator output voltage (v)
? 2004 california micro devices corp. all rights reserved. 01/27/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 7 cmpwr330 performance information (cont ? d) cmpwr330 transient characteristics (nominal conditions unless specified otherwise) (v cc source resistance set to 0.2 ? ) figure 11. v cc cold start (load = 400ma) figure 12. v cc full power down (load = 400ma) figure 13. v sby cold start (load = 400ma) figure 14. v sby full power down (load = 400ma) figure 15. v aux cold start (load = 400ma) figure 16. v aux full power down (load = 400ma) 4.48v v cc v out m 2ms 1v ch1 1v tek run: 25ks/s sample ch2 v cc v out 25ks/s tek 1 acqs 1.44v m 2ms 1v ch1 1v ch2 1.02v v syb v out m 2ms 1v ch1 1v tek run: 25ks/s sample ch1 v sby v out tek run: 25ks/s sample 3.56v m 2ms 1v ch1 1v ch2 1.26v v aux v out 1 m 2ms 1v ch1 1v tek run: 25ks/s sample ch1 2.60v v aux v out 1 m 2ms 1v ch1 1v tek run: 25ks/s sample ch1
? 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 01/27/04 cmpwr330 performance information (cont ? d) cmpwr330 transient characteristics (cont ? d; nominal conditions unless specified otherwise) (v cc source resistance set to 0.2 ? ) figure 17. v cc power up (v sby = 5v, load = 300ma) figure 18. v cc power down (v sby = 5v, load = 300ma) figure 19. v cc power up (v aux = 3.3v, load = 300ma) figure 20. v cc power down (v aux = 3.3v, load = 300ma) figure 21. load transient response (10% - 90% rated) figure 22. line transient (1v pp ) response 4.46v v cc (offset = 4.5v) v sby (offset = 5v) v out (offset = 3.3v) m 20? 100mv ch1 100mv 3 1 ch3 100mv tek run: 2.5ms/s sample ch2 4.32v v cc (offset = 4.5v) v sby (offset = 5v) v out (offset = 3.3v) m 20? 100mv ch1 100mv ch3 3 1 100mv tek run: 2.5ms/s sample ch2 4.44v v cc (offset = 4.5v) v out (offset = 3.3v) m 20? 100mv ch1 1 100mv tek run: 2.5ms/s sample ch2 4.31v v cc (offset = 4.5v) v out (offset = 3.3v) m 20? 100mv ch1 2 100mv tek run: 2.5ms/s sample ch2 3.50v load 360ma 40ma v out (offset = 3.3v) m 5? 50mv ch1 1 2v 10ms/s tek 2 acqs ch3 5v v cc v out (offset = 3.3v) m 100? 20mv ch2 2 500mv tek run: 500ks/s sample ch2 4.5v 5.5v (5ma load)
? 2004 california micro devices corp. all rights reserved. 01/27/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 9 cmpwr330 performance information (cont ? d) cmpwr330 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 j = t a + (p d )( jc ) + (p d )( ca ) = t a + (p d )( ja ) the cmpwr330 uses a thermally enhanced package where all the gnd leads (pins 5 through 8) are integral to the leadframe. 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 about 50 c/w. based on a typical operating power dissipation of 0.7w (1.75v x 0.4a) with an ambient of 70 c, the resulting junction temperature will be: t j = t a + (p d )( ja ) = 70 c + 0.7w x (50 c/w) = 70 c + 35 c = 105 c the thermal characteristics were measured using a double-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 cmpwr330 with an overall ja of 70 c/w which allows up to 780mw to be safely dissipated for the maximum junction tempera- ture. figure 23. v out variation with t amb (400ma load) t figure 25. v aux switch resistance vs t amb figure 24. select/deselect threshold variation with t junc 20 30 40 50 60 70 temperature ( ? c) 3.28 3.29 3.30 3.31 3.32 regulator output voltage (v) 25 50 75 100 125 150 temperature ( ? c) v select v deselect 4.20 4.25 4.30 4.35 4.40 4.45 4.50 4.55 threshold voltage (v) 20 30 40 50 60 70 temperature ( ? c) 0.25 0.27 0.29 0.31 0.35 0.33 0.37 on resistance ( ? )
? 2004 california micro devices corp. all rights reserved. 10 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 01/27/04 cmpwr330 mechanical details soic-8 mechanical specifications dimensions for cmpwr330 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
|
