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1 gm 660 3 3 .0a low dropout precision regulator gm660 3 v 2.0 2 application s ? microprocessor supply ? post regulators for switching supplies ? telecommunication systems ? printer supplies ? motherboards typical application circuit fixed output voltage version adjustable output voltage version notes: 1 . c in neede d i f devic e i s fa r fro m filte r capacitors 2 . c out minimu m valu e require d fo r stability description g m660 3 series of positive adjustable and fixed regulators is designed to provide 3 a output current with low dropout voltage performance. on - chip trimming adjusts the reference voltage with an accuracy of 2%. besides the f eatures mentioned, gm660 3 work s well in post regulators or micro - processor power supplies where low voltage operation and fast transient r esponse are required. gm660 3 includes over current protection and thermal shutdown protection as well. gm6605 is avail able in to - 220 and surface - mount to - 252 and to - 2 63 packages. features ? adjustable or fixed output ? output current of 3.0 a ? low dropout, 1. 1 5v max at 3 a output current ? 0.04% line regulation ? 0.2 % load regulation ? current limit protection ? 100% thermal limit bur n - in ? fast transient response v in > 4.75v gm660 3 - 3.3 v out = 3 .3v 3 .0a c in 10 f c out 10 f gm660 3 - adj r1 133 1% r2 232 1% 3 v in 2 v out 1 gnd v in > 4.75v 3 v in 2 v out 1 adj v out = 3.45v 3 .0a c in 10 f c out 10 f
2 gm 660 3 v 2.0 2 gm 660 3 3 .0a low dropout precision regulator marking information and pin configurations (top view) C pb free product to 220 to 263 (d 2 - pak) to 252 (d - pak) marking information and pin configurations (top view) C green product to 220 to 263 (d 2 - pak) to 252 (d - pak) gm 6603 g vv ayww gm 6603 g vv ayww gm 6603 g vv ayww 1. gnd/adj 2 v out 3 . v in 1. gnd/adj 2 . v out 3 . v in 1. gnd/adj 2 . v out 3 . v in g: green product vv: output voltage codes (05: 5.0v, a: adj) a: assembly/test site code y: year ww: week gm 6603 vv ayww gm 6603 vv ayww gm 6603 vv ayww 1. gnd/adj 2 v out 3 . v in 1. gnd/adj 2 . v out 3 . v in 1. gnd/adj 2 . v out 3 . v in vv: output voltage codes (05: 5.0v, a: adj) a: assembly/test site code y: year ww: week
3 gm 660 3 3 .0a low dropout precision regulator gm660 3 v 2.0 2 ordering information C pb free product ordering n u mber v out packa g e shipping gm 6603 - ata3t adj to - 263 50 units/tube gm 6603 - ata3r to - 263 800 units / reel gm 6603 - atb3t to - 220 50 units/tube gm 6603 - atc3t to - 2 52 80 units/tube gm 6603 - atc3r to - 252 2,500 units / reel gm 6603 - 1.8ta3t 1.8v to - 263 50 units/tube gm 6603 - 1.8ta3r to - 263 800 units / reel gm 6603 - 1.8tb3t to - 220 50 units/tube gm 6603 - 1.8tc3t to - 252 80 units/tube gm 6603 - 1.8tc3r to - 252 2,500 units / r eel gm 6603 - 2.5ta3t 2.5v to - 263 50 units/tube gm 6603 - 2.5ta3r to - 263 800 units / reel gm 6603 - 2.5tb3t to - 220 50 units/tube gm 6603 - 2.5tc3t to - 252 80 units/tube gm 6603 - 2.5tc3r to - 252 2,500 units / reel gm 6603 - 3.3ta3t 3.3v to - 263 50 units/tube gm 6603 - 3.3ta3r to - 263 800 units / reel gm 6603 - 3.3tb3t to - 220 50 units/tube gm 6603 - 3.3tc3t to - 252 80 units/tube gm 6603 - 3.3tc3r to - 252 2,500 units / reel gm 6603 - 5.0ta3t 5.0v to - 263 50 units/tube gm 6603 - 5.0ta3r to - 263 800 units / reel gm 6603 - 5.0tb3t to - 2 20 50 units/tube gm 6603 - 5.0tc3t to - 252 80 units/tube gm 6603 - 5.0tc3r to - 252 2,500 units / reel
4 gm 660 3 v 2.0 2 gm 660 3 3 .0a low dropout precision regulator ordering information C green product ordering n u mber v out packa g e shipping gm6603 - ata3tg adj to - 263 50 units/tube gm6603 - ata3rg to - 263 800 units / r eel gm6603 - atb3tg to - 220 50 units/tube gm6603 - atc3tg to - 252 80 units/tube gm6603 - atc3rg to - 252 2,500 units / reel gm6603 - 1.8ta3tg 1.8v to - 263 50 units/tube gm6603 - 1.8ta3rg to - 263 800 units / reel gm6603 - 1.8tb3tg to - 220 50 units/tube gm6603 - 1.8t c3tg to - 252 80 units/tube gm6603 - 1.8tc3rg to - 252 2,500 units / reel gm6603 - 2.5ta3tg 2.5v to - 263 50 units/tube gm6603 - 2.5ta3rg to - 263 800 units / reel gm6603 - 2.5tb3tg to - 220 50 units/tube gm6603 - 2.5tc3tg to - 252 80 units/tube gm6603 - 2.5tc3rg to - 2 52 2,500 units / reel gm6603 - 3.3ta3tg 3.3v to - 263 50 units/tube gm6603 - 3.3ta3rg to - 263 800 units / reel gm6603 - 3.3tb3tg to - 220 50 units/tube gm6603 - 3.3tc3tg to - 252 80 units/tube gm6603 - 3.3tc3rg to - 252 2,500 units / reel gm6603 - 5.0ta3tg 5.0v to - 26 3 50 units/tube gm6603 - 5.0ta3rg to - 263 800 units / reel gm6603 - 5.0tb3tg to - 220 50 units/tube gm6603 - 5.0tc3tg to - 252 80 units/tube gm6603 - 5.0tc3rg to - 252 2,500 units / reel
5 gm 660 3 3 .0a low dropout precision regulator gm660 3 v 2.0 2 absolute maximum ratings parameter symbol ratings units input voltag e v i 15 v power dissipation p d internally limited w operating junction temperature t j - 4 0 to 125 c storage temperature t stg - 6 0 to 1 50 c lead temperature 1.6mm (1/6 inch) from case for 10 seconds 260 c block diagram v out v in adj gnd for fixed output options
6 gm 660 3 v 2.0 2 gm 660 3 3 .0a low dropout precision regulator electrical characteristics ( t i = 25 c , i nless otherwise noted) parameter symbol test condition m in t yp m ax u nit reference voltage gm 6603 - a v ref i out = 10ma, v in = 5.0 v 1.238 1.250 1.262 v 10ma i out 3 a , 1.5 v v in C v out 10 v 1.2 25 1.250 1.27 5 output voltage gm 6603 - 1.8 v o i out = 10ma, v in = 3.3v 1.782 1.800 1.818 v 10ma i out 3 a, 1.5v v in C v out 10v 1.764 1.800 1.836 gm 6603 - 2.5 i out = 10ma, v in = 4v 2.475 2.500 2.525 1 0ma i out 3 a, 1.5v v in C v out 10v 2.460 2.500 2.540 gm 6603 - 3.3 i out = 10ma, v in = 4.8v 3.267 3.300 3.333 10ma i out 3 a, 1.5v v in C v out 10v 3.247 3.300 3.353 gm 6603 - 5.0 i out = 10ma, v in = 6.5v 4.950 5.000 5.050 10ma i out 3 a, 1.5v v in C v out 10v 4.920 5.000 5.080 line regulation gm 6603 - a ? v oi i out = 10ma 0.04 0.20 % gm 6603 - 1.8 i out = 10ma, 3.3v v in 10 v gm 6603 - 2.5 i out = 10ma, 4v v in 10 v gm 6603 - 3.3 i out = 10ma, 4.8v v in 10 v gm 6603 - 5.0 i o ut = 10ma, 6.5v v in 10 v load regulation gm 6603 - a ? v ol v in C v out =1.5v, 10ma i out 3 a 0. 2 0.40 % gm 6603 - 1.8 v in = 3.3 v, 10ma i out 3 a gm 6603 - 2.5 v in = 4.0 v, 10ma i out 3 a gm 6603 - 3.3 v in = 4.8 v, 10ma i out 3 a gm 6603 - 5.0 v in = 6.5 v, 10ma i out 3 a dropout voltage v d i out = 3 a 1.15 1.3 v current limit i cl v in C v out =3v 3 4.5 a minimum load current i o(min) v in = 5.0v 3 7 ma quiescent current gm 6603 - 1.8 i q v in = 3.3v, 10ma i out 3 a 7 10 ma gm 6603 - 2.5 v in = 4.0v, 10ma i out 3 a gm 6603 - 3.3 v in = 4,8v, 10ma i out 3 a gm 6603 - 5.0 v in = 6.5v, 10ma i out 3 a adjust pin current gm 6603 - a i adj i out = 10ma, 1.5 v v in C v out 10 v 40 90 a temperature coefficient i out = 10ma, v in C v o ut = 1.5v 0.005 % / c ripple rejection r a i out = 3 a, v in C v out = 1.5v 60 80 db
7 gm 660 3 3 .0a low dropout precision regulator gm660 3 v 2.0 2 r2 r1 gm660 3 - ad j a dj v out c out 150 f v in 1n4002 c adj 10 f application information gm 6603 series linear regulators provide fixed and ad justable output voltages at currents up to 3.0 a. these regulators are protected against ove r - current conditions and include thermal shutdown protection. the gm 6603 has a composite pnp - npn output transistor and require an output capacitor for stability. a detailed procedure for selecting this capacitor is as below: stability considerations the ci rcuit design used in the gm6603 series requires the use of an output capacitor as part of the device frequency compensation. the addition of 150f aluminum electrolytic or a 22f solid tantalum on the output will ensure stability for all operating conditio ns. when the adjustment terminal is bypassed with a capacitor to improve the ripple rejection, the requirement for an output capacitor increases. the value of 22f tantalum or 150f aluminum covers all cases of bypassing the adjustment terminal. without by passing the adjustment terminal smaller capacitors can be used with equally good results. to ensure good transient response with heavy load current changes capacitor values on the order of 100f are used in the output of many regulators. to further improve stability and transient response of these devices larger values of output capacitor can be used. protection diodes unlike older regulators, the gm6603 family does not need any protection diodes between the adjustment pin and the output and from the output to the input to prevent over stressing the die. internal resistors are limiting the internal current paths on the gm6603 adjustment pin, therefore even with capacitors on the adjustment pin no protection diode is needed to ensure device safety under short - circuit conditions. microsecond surge currents of 50a to 100a can be handled by the internal diode between the input and output pins of the device. in normal operations it is difficult to get those values of surge currents even with the use of large outpu t capacitances. if high value output capacitors are used, such as 1000f to 5000f a t the input pin , is instantaneously shorted to ground, damage can occur. a diode from output to input is recommended, when a crowbar circuit at the input of the gm6603 is u sed. normal power supply cycling or even plugging and unplugging in the system will not generate current large enough to do any damage. the adjustment pin can be driven on a transient basis 25v, with respect to the output without any device degradation. a s with any ic regulator, none the protection circuitry will be functional and the internal transistors will break down if the maximum input to output voltage differential is exceeded. r ipple rejectio n the ripple rejection values are measur ed with the adjustment pin bypassed. the impedance of the adjust pin capacitor at the ripple frequency should be less than the value of r1 (normally 100 . to 120 . ) for a proper bypassing and ripple rejection approaching the values shown. the size of the req uired adjust pin capacitor is a function of the input ripple frequency. if r1=100 . at 120hz the adjust pin capacitor should be 25f. at 10khz only 0.22f is needed. the ripple rejection will be a function of output voltage, in circuits without an adjust pi n bypass capacitor. the output ripple will increase directly as a ratio of the output voltage to the reference voltage (v out / v ref ). diodes between the input and output are not usually needed.
8 gm 660 3 v 2.0 2 gm 660 3 3 .0a low dropout precision regulator (a) fixed version (b) adjustable version condu c tor paras i t i c res i stan c e r c v in v out gm660 3 - 3.3 gnd r load condu c tor paras i t i c res i stan c e r c v in v out gm660 3 - a adj r load r 1 r 2 output voltage sensing gm 6603 ser i es i s a three - term i nal regulator, so it cannot prov i de true remote load sens i ng. lo ad regulat i on is l i m i ted by the res i stan c e of the c ondu c tors c onne c t i ng the regulator to the load. for best results, g m 6603 should be c onne c ted as shown 1n f1gure 2. calculating power dissipation and heat sink requirements gm 660 3 ser i es i n c lude ther mal shutdown and c urrent l i m i t ci r c u i try to prote c t the dev ic es. h owever, h i gh power regulators normally oper ate at h i gh jun c t i on temperatures so i t i s i mportant to c al c ulate the power d i ss i pat i on and jun c t i on tempera tures a cc urately t o be sure to use an adequate heat s i nk. the c ase i s c onne c ted to v out on gm 6603 , so ele c tr ic al i solat i on may be requ i red for some appl ic at1ons. thermal c ompound should always be used w i th h i gh c urrent regulators l i ke gm 6603 . the thermal c hara c ter i st ic s of an ic depend on four fa c tors: 1. max i mum amb i ent temperature t a (c) 2. power d i ss i pat i on p d (watts) 3. max i mum jun c t i on temperature t j (c) 4. thermal res i stan c e jun cti on to amb1ent ? ja the relat i onsh i p of these four fa c tors i s expressed by equat i on (1): t j = t a + p d x ? ja max i mum amb i ent temperature and power d i ss i pat i on are determ1ned by the des i gn wh i le the max i mum jun c t i on temperature and thermal res i stan c e depend on the manufa c turer and the pa c kage type. the max i mum power d i ss i pat i on for a regulator i s ex pressed by equat i on (2): p d(max) = (v in(max) C v out(m in ) ) x i out(min) + v in(min) x i q where: v in( max ) i s the max i mum i nput voltage, v out( min ) i s the m i n i mum output voltage, i out( max ) i s the max i mum output c urrent i q i s the max1mum qu i es c ent c urrent at i out( max ) . a heat s i nk effe c t1vely i n c reases the surfa c e area of the pa c kage to i mprove the flow of heat away from the ic i nto the a i r. ea c h mater i al i n the heat flow path between the ic and the env i ronment has a thermal res i stan c e. l i ke ser i es ele c tr ic al res i stan c es , these res i stan c e are summed to determ i ne ? ja , the total thermal resistance between the junction and the air. this is expressed by equation (3): ? ja = ? jc + ? cs + ? sa where: ? jc i s the thermal resistance of junction to case , ? cs i s the thermal resistance of case to heat sink , ? sa i s the thermal resistance of heat sink to ambient air. the value for ? ja is calculated using e quation (3) and the result can be s ubstitut ed in equation (1). the value for ? cs is 3.5c/w for a given package typed based on an avera ge d1ie size. for a h i gh current regulator such as gm 6603 , the majority of the heat i s generated i n the power trans i stor se c t1on. figure 1 . conductor parasitic r esistance effects are minimized by this grounding scheme .
9 gm 660 3 3 .0a low dropout precision regulator gm660 3 v 2.0 2 o utput current(a) figure 1 . dropout voltage vs. output current dropout voltage (v) 2.70 2.40 2.10 1.80 1.50 1.20 0.90 0.60 3.00 0 0.30 t case = 0 c t case = 25 c t case = 125 c 1.12 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 0.75 t j ( c) figure 2 . bandgap reference voltage deviation vs. temperature 90 60 120 30 0 reference voltage deviation ( % ) +0.3 + 0.2 +0.1 0 - 0.1 - 0.2 - 0.3 frequency (hz ) figure 3 . ripple rejection vs. frequency 10 4 10 3 10 5 10 2 10 1 ripple rejection ( db ) 70 60 90 40 30 20 10 10 6 8 0 50 t case = 0 c t case = 25 c t case = 125 c 0.65 0.60 0.55 0.50 0.45 0.40 mi nimum load current ( ma) v in - v out (v) figure 4 . minimum load current vs. v in - v out 4 3 5 2 1 7 6 8 typical performance characteristics
10 gm 660 3 v 2.0 2 gm 660 3 3 .0a low dropout precision regulator unit: mm 3 3 2 - r 0.3 10.00 0.20 8.0 7.0 0.9 7.0 4.50 0.20 1.30 +0.1 - 0.05 3 3 3 3 - r0.2 2.40 0.20 9.90 0.20 3.60 0.20 2.80 0.10 1.30 0.10 2.54 typ (2.54 0.20) 13.08 0.20 9.20 0.20 15.90 0.20 18.95 max 10.08 0.30 8.70 1.70 1.50 dp0.20 3.70 0.20 4.6 0 8.40 1.46 1.00 1.27 0.10 45 3.00 0.80 0.10 1.52 0.10 0.50 +0.1 - 0.05 package outline dimensions C to263 package outline dimensions C to220 0.045 - 0.055 (1.143 - 1.397) 0.050 +/- 0.012 (1.270 +/- 0.305) 0.090 - 0.110 (2.286 - 2.794) 0.143 + 0.012 0.143 - 0.002 (3.632 + 0305) (3.362 - 0.508) 0.050 (1.270) 0.013 - 0.023 (0.330 - 0.584) typ 0.059 (1.499) 0.020 - 0.039 (0.510 - 0.990) 0.330 - 0.370 (8.382 - 9.398) 0.060 (1.524) typ 0.390 - 0.415 (9.906 - 10.541) typ 15 0.105 - 0.180 (4.191 - 4.572)
11 gm 660 3 3 .0a low dropout precision regulator gm660 3 v 2.0 2 package outline dimensions C to252 0.370 C 0.410 (9.400 C 10.420) 0.205 C 0.215 (5.21 0 C 5.460) 0.210 C 0.228 (5.33 0 C 5.800) 0.055 C 0.080 (1.400 C 2.030) 0.018 C 0.023 (0.460 C 0.580) 0.030 C 0.045 (0.760 C 1.140) 0.180 (4.570) typ 0.090 (2.285) typ 0.045 C 0.060 (1.150 C 1.520) 0.039 C 0.050 (1.020 C 1.270) 0.018 C 0.023 (0.460 C 0.580) 0.020 (0.510) min note: pb - f ree products : ? rohs compliant and compatible with the current require - ments of ipc/jedec j - std - 020. ? suitable for use in pb - free soldering processes with 100% matte tin (sn) plating. green products : ? l ead - free (rohs compliant) ? h alogen free(br or cl do es not exceed 900ppm by weight in homogeneous material and total of br and cl does not exceed 1500ppm by weight) seating plan
12 gm 660 3 v 2.0 2 gm 660 3 3 .0a low dropout precision regulator 6 8 10 o rdering number g m 6603 - 1.8 ta3 t g a p m g a m m a m i c r o c i r c u i t t yp e o u t p u t v o l t a g e s p a c k a g e t yp e s h i p p i n g t yp e a : a d j 1.8: 1.8 v 2.5: 2.5v 3.3: 3.3v 5.0: 5.0v t a 3 : t o 2 6 3 t b 3 : t o 2 2 0 t c 3 : t o 2 5 2 t : tube r: t ape & reel b l a n k : pb - f r e e g : g r e e n note: pb - free products : ? rohs compliant and compatible with th e current require - ments of ipc/jedec j - std - 020. ? suitable for use in pb - free soldering processes with 100% matte tin (sn) plating. green products : ? l ead - free (rohs compliant) ? h alogen free(br or cl does not exceed 900ppm by weight in homogeneous material and total of br and cl does not exceed 1500ppm by weight)

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