? 2004 california micro devices corp. all rights reserved. 01/10/05 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 1 cm3004 preliminary 1.0 amp dual mode low-dropout cmos regulator features ? internally fixed or adjustable output modes ? 250mv dropout at 1.0a load current ? operates from 1.7v to 5.5v input supply ? low ground current (330 a at 1.0a load) ? minimal output capacitance required ? stable with low esr ce ramic output capacitors ? current limit protection ? thermal overload protection ? reverse current protection in shutdown ? thermally enhanced 8-lead soic package ? lead-free version available applications ? low-voltage "core" processors ? set top boxes ? dvd players ? personal video recorders ? graphics cards ? gigabit nic cards ? pc motherboards ? notebooks product description the cm3004 is a very-low-dropout regulator that offers both fixed output and fixed/adjustable operating modes. when the adjust control pin (adj) is grounded, this device automatically enters a fixed voltage mode delivering 2.5v out at 1.0a. when the adjust pin is con- nected to an external resistor network the device auto- matically operates as an adjustable regulator. the adjust pin can also be tied directly to the out pin which configures the cm3004 as a 1.2v regulator. an enable control pin (en) allows the device to be placed in a low-current mode. the cm3004 is fully protecte d, offering both overload current limiting, short-circuit protection and high-tem- perature thermal shutdown. the cm3004 also includes protection against output to input current flow while in shutdown. the cm3004 is supplied in a space-saving, 8-lead power soic package which has been thermally enhanced via an integral leadframe to ensure maxi- mum junction-to-ambient power dissipation. the cm3004 is also available wit h optional lead-free finish- ing. simplified electrical schematic typical application circuits 10 f 100 n f v out gnd cm3004 v in 3.3v 10 f 2.5v/1.0a in en out gnd adj 10 f 100 n f v out gnd cm3004 v in 1.8v 10 f 1.2v/1.0a in en out gnd adj en 1.2v reference voltage + in gnd en adj over current short circuit over temp - 1.7v-5.5v controller 2.5v output when adj = gnd out automatically selects adjustable output (when external resistors are present) fixed adj 1.0 amp
? 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 01/10/05 cm3004 preliminary ordering information note 1: parts are shipped in tape & reel form unless otherwise specified. pin descriptions lead(s) name description 1 en enable/shutdown input. when en is asserted high (v en 1.2v), the regulator is enabled. when en is asserted low (v en 0.4v), the regulator is shut down. 2 in positive input voltage for the regul ator. if this input pin is greater than 2 inches from the main input filter, a 10 f ceramic capacitor is recommended for adequate filtering. 3 out the regulated voltage output. an output capacitor of 10 f is recommended to minimize any tran- sient load disturbances under normal operating cond itions. additional output capacitance can be used to further improve transient load response. 4 adj feedback input. when adj is grounded, the device enters fixed voltage mode. when adj is con- nected to an external resistor network, the dev ice operates as an adjustable regulator. the adjust pin can also be tied directly to the out pin which configures the cm3004 as a 1.2v regulator. 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-lead power soic 1 2 3 4 8 7 6 5 en in out adj gnd gnd gnd gnd top view part numbering information leads package standard finish lead-free finish ordering part number 1 part marking ordering part number 1 part marking 8 soic-8 cm3004-25sa cm3004 25sa CM3004-25SF cm3004 25sf
? 2005 california micro devices corp. all rights reserved. 01/10/05 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 3 cm3004 preliminary specifications note 1: the soic package used is thermally enhanced through the us e of a fused integral leadframe. the power rating is based on a printed circuit board heat spreading capabili ty equivalent to 2 square inches of co pper connected to the gnd pins. typical multi-layer boards using power plane constr uction will provide this heat spreading ability without the need for additional ded- icated copper area. (please consult with factory for thermal evaluation assistance) absolute maximum ratings parameter rating units esd protection (hbm) 2000 v pin voltages in, out, adj, en [gnd - 0.4] to +6.0 v storage temperature range -40 to +150 c operating temperature range junction -40 to +150 c power dissipation (see note 1) internally limited w standard operat ing conditions parameter value units v in 1.7 to 5.5 v ambient operating temperature range -40 to +85 c load current 0 to 1000 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 01/10/05 cm3004 preliminary specifications (cont?d) enable pin input adjust pin input (output set by external resistors) note 1: operating characteristics are over standard operating condit ions unless otherwise specified. electrical operat ing characteristics (see note 1) symbol parameter conditions min typ max units v out regulator output voltage 0ma < i load < 1.0a, v in =3.3v, v adj =0v 2.40 2.50 2.60 v 0ma < i load < 1.0a, v in =1.8v, v adj =v out 1.15 1.20 1.25 v i lim overload current limit v in =3.3v,v out = 2.5v 2.2 3.0 3.8 a i sc short circuit current limit v out < 0.2v 0.5 1.2 1.8 a v r load load regulation v in =3.3v,v out = 2.5v, 100ma < i load < 1.0a 5 20 mv v in =1.8v,v out = 1.2v, 100ma < i load < 1.0a 5 20 mv v r line line regulation xx 3.0v < v in < to 5.0v, v out = 2.5v, i load = 5ma 5 20 mv 1.7v < v in < to 3.5v, v out = 1.2v, i load = 5ma 5 20 mv v dropout dropout voltage i load = 100ma i load = 1.0a 25 250 45 450 mv mv i gnd ground current en tied to gnd, v in =3.3v en=v in =3.3v, v out = 2.5v, i load = 0ma en=v in =3.3v, v out = 2.5v, i load = 1.0a 5 325 330 30 500 550 a a a i rout output reverse leakage v out =3.3v; v in = 0v 30 100 a t disable t hyst shutdown temperature thermal hysteresis 160 25 c c v en_th en input threshold voltage regulator enabled 0.4 0.8 1.2 v i en enable input leakage current 0v < v en < 5.5v 0.1 5 a v adj_th adj input threshold voltage 0.1 0.2 0.3 v i adj adj input leakage current v adj > 1.1v 0.1 1 a
? 2005 california micro devices corp. all rights reserved. 01/10/05 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 5 cm3004 preliminary performance information typical dc characteristics nominal c onditions unless specified otherwise) nominal conditions: c in = 10f, c out = 10f figure 1. line regulation, (i load =5ma) figure 2. load regulation (v in = 1.8v) figure 3. operating voltage range (v out = 1.2v) figure 4. line regulation, (i load =5ma) figure 5. load regulation (v in = 3.3v) figure 6. operating voltage range (v out = 2.5v) 1.15 1.20 1.25 1.7 1.8 2.0 2.5 3.0 3.3 3.5 input voltage (v) output voltage (v) 1.15 1.2 1.25 0.0 0.5 1.0 load current (a) output voltage (v) .2 . . . 1 1.2 1. .511.522.5.5.555.5 input voltage (v) output voltage (v) 2. 2.5 2.5 2.55 2. . . 5. input voltage (v) output voltage (v) 2. 2.5 2.5 2.55 2. .51. load current (a) output voltage (v) .5 1 1.5 2 2.5 .5 1 1.5 2 2.5 .5 .5 5 5.5 input voltage (v) output voltage (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 01/10/05 cm3004 preliminary performance information (cont?d) typical transient characteristics (nomin al conditions unless specified otherwise) nominal conditions: c in = 10f, c out = 10f figure 7. load transient step response figure 8. enable/disable response figure 9. enable/disable response figure 10. load transient step response figure 11. enable/disable response figure 12. enable/disable response v in =1.8v, v out =1.2v c in =10 f ceramic, c out =10 f ceramic 10ma 1.0a i out v out i out =10ma, c in =10 f cer., c out =10 f cer. en=1.8v=v in en=0v v out =1.2v v out =0v i out =1.0a, c in =10 f cer., c out =10 f cer. en=1.8v=v in en=0v v out =1.2v v out =0v v in =3.3v, v out =2.5v c in =10 f ceramic, c out =10 f ceramic 10ma 1.0a i out v out i out =10ma, c in =10 f cer., c out =10 f cer. en=3.3v=v in en=0v v out =2.5v v out =0v i out =1.0a, c in =10 f cer., c out =10 f cer. en=3.3v=v in en=0v v out =2.5v v out =0v
? 2005 california micro devices corp. all rights reserved. 01/10/05 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 7 cm3004 preliminary performance information (cont?d) cm3004 typical thermal characteristics the overall junction to ambient thermal resistance ( ja ) for device power dissipat ion (pd) 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 lay- out. the final operating junction temperature for any set of conditions can be estimated by the following thermal equation: t junc = t amb + p d ( jc ) + p d ( ca ) = t amb + p d ( ja ) the cm3004 uses a thermally enhanced package where all the gnd 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 50c/w. based on a typical operating power dissipation of 1.0w with an ambient of 85c, the resulting junction temper- ature will be: t junc = t amb + p d ( ja ) = 85c + 1.0w (50c/w) = 85c + 50c = 135c thermal characteristics were measured using a double sided board with two square inches of copper area connected to the gnd pins for "heat spreading". mea- surement was performed under light load conditions (5ma). temperature vs. output voltage (1.2v) 1.15 1.17 1.19 1.21 1.23 1.25 -40 25 85 temperature ('c) output voltage (v) temperature vs. output voltage ( 2.5v ) 2.40 2.45 2.50 2.55 2.60 -40 -25 0 25 50 75 85 100 125 150 temperature ('c) output voltage (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 01/10/05 cm3004 preliminary application information figure 13. application circuit for adjustable output operation. output voltage = 1.20 (r1+r2) / r2 [volts] cm3004 in en out gnd 10 f 100 n f v out gnd adj v in 3.3v 10 f 1.0a r2 r1
? 2005 california micro devices corp. all rights reserved. 01/10/05 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 9 cm3004 preliminary mechanical details soic-8 mechanical specifications dimensions for the cm3004 supplied in an 8-lead soic package are presented below. for complete information on the soic-8 package, see the california micro device s soic package informa- tion document. * this is an approximate number which may vary. package dimensions for soic-8 package dimensions package soic lead 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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