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2 gm6610x v2.06 gm6610x series 1.0a ultra low dropout voltage regulators www.gammamicro.com.tw application high efficiency linear regulators ideal for 3.0v to 2.5v conversion ideal for 2.5v to 1.8v conversion battery powered equipment automotive electronics post regulators for switching supplies description the gm66100/1/2 series are 1a ultra low-dropout linear voltage regulators t hat provide low-voltage, high output current from an extremely small package. the gm66100/1/2 offers extremely low dropout (typically 410 m v at 1a) and low ground current (typically 12ma at 1a). the gm66100 offers 3 lead packages with a fixed output voltage options while gm66101/2 offer so8 packages for fixed and adjustable output voltages accordingly. the gm66100/1/2 is ideal for pc add-in cards that need to convert from standard 5v to 3.3v, 3.3v to 2.5v or 2.5v to 1.8v. a guaranteed maximum dropout voltage of 630mv over all operating conditions allows the gm66100/1/2 provide 2.5v from a supply as low as 3.13v and 1.8v from a supply as low as 2.43v. the gm66100/1/2 is fully protected with over current limiting, thermal shutdown, and reversed- battery protection. features ? fixed and adjustable output voltages ? typical 410mv dropout voltage @ 1a ? 1a minimum guaranteed output current ? accurate 1% guaranteed tolerance ? current limiting and thermal shutdown ? reverse-battery protection ? reversed leakage protection ? fast transient response typical application circuits gm66100-2.5 v in v out gnd v in 3.3v v out 2.5v 10uf v in v out gnd v in 3.3v v out 2.5v 10uf flag error flag output gm66101-2.5 enable enable shutdown 2.5v/1a regulator 2.5v/1a regulator with error flag 1.5v/1a adjustable regulator gm66102 v in v out gnd v in 2.5v v out 1.5v 10uf enable enable shutdown adj r1 r2
3 gm6610x series 1.0a ultra low dropout voltage regulators gm6610x v2.06 marking information and pin configurations (top view) gm66100 to 252 (d-pak) to 263 (d 2 -pak) to 220 sot223 gm66101 so8 gm66102 so8 gm66100g vvayww 1. v in 2. gnd 3. v out gm66100g vvayww 1. v in 2.gnd 3. v out gm66100g vvayww 1. v in 2. gnd 3. v out gm66100g vvayww 1.v in 2. gnd 3. v out gm66101g vvayww en v in v out flag gnd gnd gnd gnd gm66102g ayww en v in v out adj gnd gnd gnd gnd g: green product vv: fixed output (15 = 1.5v, 25 = 3.3v?) a: assembly / test site code y: year ww: week g: green product vv: fixed output (15 = 1.5v, 25 = 3.3v?) a: assembly / test site code y: year ww: week g: green product a: assembly / test site code y: year ww: w ee k
4 gm6610x v2.06 gm6610x series 1.0a ultra low dropout voltage regulators ordering information ordering number output voltage package shipping gm66100 gm66100-1.8ta3rg 1.8v to-263 800 units / reel gm66100-1.8tb3tg 1.8v to-220 50 units/tube gm66100-1.8tc3tg 1.8v to-252 2,500 units/reel gm66100-1.8st3rg 1.8v sot-223 2,500 units/reel gm66100-2.5ta3rg 2.5v to-263 800 units / reel gm66100-2.5tb3tg 2.5v to-220 50 units/tube gm66100-2.5tc3rg 2.5v to-252 2,500 units / reel gm66100-2.5st3rg 2.5v sot223 2,500 units / reel gm66100-3.3ta3rg 3.3v to-263 800 units / reel gm66100-3.3tb3tg 3.3v to-220 50 units/tube gm66100-3.3tc3tg 3.3v to-252 2,500 units/reel gm66100-3.3st3rg 3.3v sot-223 2,500 units/reel gm66100-5.0ta3rg 5.0v to-263 800 units / reel gm66100-5.0tb3tg 5.0v to-220 50 units/tube gm66100-5.0tc3rg 5.0v to-252 2,500 units / reel gm66100-5.0st3rg 5.0v sot223 2,500 units / reel ordering information (continued) ordering number output voltage package shipping gm66101 gm66101-1.8s8rg 1.8v sop-8 2,500 units/reel gm66101-2.5s8rg 2.5v sop-8 2,500 units/reel gm66101-3.3s8rg 3.3v sop-8 2,500 units/reel ordering information (continued) ordering number output voltage package shipping gm66102 gm66102s8rg adj sop-8 2,500 units/reel
5 gm6610x series 1.0a ultra low dropout voltage regulators gm6610x v2.06 absolute maximum ratings ( note 1 ) rating symbol value unit supply voltage v in -20 to +20 v enable voltage v en +20 v storage temperature range t stg - 65 to 150 c lead temperature (soldering, 10 sec) + 260 c esd note 3 operating ratings ( note 2 ) rating symbol value unit supply voltage v in 2.25 to 16 v enable voltage v en 2.25 to 16 v maximum power dissipation p d(max) note 4 junction temperature range t j -40 to 125 c sot223 15 c/w package thermal resistances so8 jc 20 c/w
6 gm6610x v2.06 gm6610x series 1.0a ultra low dropout voltage regulators block diagram gm66100 fixed regulator block diagram gm66101 fixed regulator with flag and enable block diagram gm66102 adjustable regulator with enable block diagram v in v out gnd ref 1.24v thermal shut down 18v v in v out gnd ref 1.24v thermal shut down 18v flag en v in v out gnd ref 1.24v thermal shut down 18v en adj
7 gm6610x series 1.0a ultra low dropout voltage regulators gm6610x v2.06 electrical characteristics: (v in = v out + 1v, v en = 2.25v,unless otherwise specified: t j = 25c, bold values are guaranteed across the full operating temperature range) parameter condition symbol min typ max unit i o = 10ma -1 1 output voltage 10ma < i o < 1a, v out + 1v < v in < 8v v out -2 -2 % line regulation i o = 10ma, v out + 1v < v in < 16v v oi 0.06 0.5 % load regulation v in = v out + 1v, 10ma < i o < 1a v ol 0.2 1.0 % output temperature coefficient note 5 v out / t 40 100 ppm/ c 150 200 i o = 100ma, v oi = -1% 250 i o = 500ma, v oi = -1% 275 i o = 750ma, v oi = -1% 330 500 410 550 dropout voltage, note 6 i o = 1a, v oi = -1% v do 630 mv i o = 100ma, v in = v out + 1v 700 a i o = 500ma, v in = v out + 1v 4 i o = 750ma, v in = v out + 1v 7 ground current note 7 i o = 1a, v in = v out + 1v i gnd 12 20 ma current limit v out = 0v, v in = v out + 1v i cl 1.8 2.5 a enable input parameter condition symbol min typ max unit logic low (off) v en(low) 08 v enable input voltage logic high (on) v en(high) 2.25 1 15 30 v en = 2.25v i en(low) 75 2 enable input current v en = 0.8v i en(high) 4 a
8 gm6610x v2.06 gm6610x series 1.0a ultra low dropout voltage regulators flag output parameter condition symbol min typ max unit 0.01 1 output leakage current v oh = 16v i flg(leak) 2 a 240 300 output low voltage note 8 vi n = 0.9v+v out nominal, i cl =250 a v flg (do) 400 mv low threshold % of v out 93 high threshold % of v out 99.2 hysteresis 1 % 1 15 30 i en(low) 75 2 enable input current v en = 0.8v i en(high) 4 a gm66102 only parameter condition symbol min typ max unit 1.228 1.24 1.252 1.215 1.265 reference voltage note 9 v ref 1.203 1.277 v 40 80 adjust pin bias current i adj 120 a reference voltage temp coefficient note 5 v ref / t 20 ppm/c adjust pin bias current temp coefficient i adj / t 0.1 99.2 na/c note 1: exceeding the absolute ma ximum ratings may damage the device. note 2: the device is not guaranteed to function outside its operating rating. note 3: devices are esd sensitive. handling precautions is recommended. note 4: p d(max) = (t j(max) ? t a )/ ja , where ja is junction to ambient thermal resistance note 5: output voltage temperature coefficient is v out(worst case) /(t j(max) -t j(min) ), where t j(max) is 125c and t j(min) is 0c note 6: v do = v in ? v out when v out decreases to 99% of its nominal output voltage with v in = v out + 1v. for output voltage below 2.25v, dropout voltage is the input-to-output voltage differential with the minimum input voltage being 2.25v. minimum input operating voltage is 2.25v. note 7: i gnd is the quiescent current. i in = i gnd + i out note 8: for adjustable device and fixed device with v out > 2.5v note 9: v ref v out (v in ? 1v), 2.25v v in 16v, 10ma i l 1a
9 gm6610x series 1.0a ultra low dropout voltage regulators gm6610x v2.06 application information the gm66100/1/2 is a low dropout voltage regulator suitable for applications which ultra low dropout performance is needed. unlike older npn-pass transist or designs, where the minimum dropout voltage is limited by the base-to-emitter voltage drop and collector-to-emitter saturation voltage, dropout performance of the pnp output of these devices is limited only by the low v ce saturation voltage. the gm66100/1/2 regulator is fully protected from damage due to fault conditions. linear current limiting is provided. output current during overload conditions is constant. t hermal shutdown disables the device when the die temperature exceeds the maximum safe operating temperature. trans ient protection allows device (and load) survival even when the input voltage spikes above and below nominal. the output structure of these regulators allows voltages in ex cess of the desired output voltage to be applied without reverse current flow. output capacitor an output capacitor is required for the gm66100/1/2 to maintain stability and improve transient response. proper capacitor selection is important to ensure pr oper operation. the output capacitor selection is dependent upon the esr (equivalent series resistance ) of the output capacitor to maintain stability. when the output capacitor is 10 f or greater, the esr value of the output capacitor should be less than 2 ? for the purpose of transient re sponse improvement as well as st ability. ultra-low-esr capacitors (<100m ? ), such as ceramic chip ca pacitors, may promote instabilit y. a low-esr solid tantalum capacitor works extremely well and provides good tr ansient response and stability over temperature. aluminum electrolytes can also be used, as long as the esr of the capacitor is <2 ? . the value of the output capacitor can be increased without limit. higher capacitance values help to improve transient response and ripple rejection and reduce output noise. input capacitor an input capacitor of 1 f or greater is recommended when the device is more than 4 inches away from the bulk ac supply capacitance or when the supply is a battery. small, surface mount, ceramic chip capacitors can be used for bypassing. larger values will help to improve ripple rejection by bypassing the input to the regulator, further impr oving the integrity of the output voltage. error flag the gm66101 features an error flag (flg), which monitors the output voltage and sends out an error signal when the output voltage drops 5% below its ex pected value. the error flag is an open-collector output that pulls low under fault conditions and ma y sink up to 10ma. low output voltage signifies a number of possible problems, including an over current fault (the device is in current limit) or low input voltage. the flag output is inoperative during over tem perature conditions. a pull-up resistor from flg to either v !n or v out is required for proper operation. for information regarding the minimum and maximum values of pull-up resistance, refer to the graph in the typical characteristics section of the data sheet. fi g ure 1. ca p acitor re q uirements gm66100-x.x v in v out in out gnd c in c out
10 gm6610x v2.06 gm6610x series 1.0a ultra low dropout voltage regulators enable input the gm66101 and gm66102 feature an active-high enable input (en) which allows on-off control of the regulator. the en input has ttl/cmos compatible th resholds for simple logic interfacing. en may be directly tied to v in and pulled up to the maximum supply voltage. transient response and 3.3v to 2.5v or 2.5v to 1.8v conversion the gm66100 series has excellent transient response to variations input voltage and load current. the device has been designed to respond quickly to load current variations and input voltage variations. large output capacitors are not required to obtain this performance. a standard 10 f output capacitor, preferably tantalum, is all that is required. larger values help to improve performance even further. by virtue of its low-dropout voltage, this device does not saturate into dropout as readily as similar npn- based designs. when converting from 3.3v to 2.5v or 2.5v to 1.8v, the npn based regulators are already operating in dropout, with typical dropout re quirements of 1.2v or greater. to convert down to 2.5v or 1.8v without operating in dropout, npn based regulators require an input voltage of 3.7v at the very least. the gm66100 regulator will provide excellent perfor mance with an input as low as 3.0v or 2.5v respectively. this gives the pnp based regulators a distinct advantage over older, npn based linear regulators. minimum load current the gm66100/1/2 regulator is specified between finite loads. if the output current is too small, leakage currents dominate and the output voltage rises. a 10 ma minimum load current is necessary for proper regulation. adjustable regulator design the gm66102 allows programming the output volt age anywhere between 1.24v and the 16v maximum operating rating of the family. two resistors are used. the resistor values are calculated by: r1 = r2 x (v out /1.24 - 1) where v out is the desired output voltage. figure 2 shows component definiti on. applications with widely varying load currents may scale the resistors to draw the minimum load current required for proper operation (see above). gm66102 v in v out gnd v in v out c out enable enable shutdown adj r1 r2 figure 2. adjustable regulator with resistors v out = 1.24v x (1+ r1/r2)
11 gm6610x series 1.0a ultra low dropout voltage regulators gm6610x v2.06 package outline dimensions ? sot223 0.248 - 0.264 (6.30 - 6.71) 0.116 - 0.124 (2.95 - 3.15) nom 0.090 (2.29) 0.264 - 0.287 (6.71 - 7.29) 0.130 - 0.146 (3.30 - 3.71) 0.033 - 0.041 (0.84 - 1.04) nom 10 - 16 10 - 16 (0.31) 0.012 max 10 min 0.0008 - 0.0040 (0.0203 - 0.1016) 0.010 - 0.014 (0.25 - 0.36) 0.81 (4.6) 0.025 - 0.033 (0.64 - 0.84) nom max 0.071 (1.8) package outline dimensions ? to252 seating plan 0.370 ? 0.410 (9.400 ? 10.420) 0.205 ? 0.215 (5.210 ? 5.460) 0.210 ? 0.228 (5.330 ? 5.800) 0.055 ? 0.080 (1.400 ? 2.030) 0.018 ? 0.023 (0.460 ? 0.580) 0.030 ? 0.045 (0.760 ? 1.140) 0.180 (4.570) typ 0.090 (2.285) typ 0.045 ? 0.060 (1.150 ? 1.520) 0.039 ? 0.050 (1.020 ? 1.270) 0.018 ? 0.023 (0.460 ? 0.580) 0.020 (0.510) min
12 gm6610x v2.06 gm6610x series 1.0a ultra low dropout voltage regulators package outline dimensions ? to263 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) package outline dimensions ? so 8 (0.356 - 0.508) (0.406 - 0.270) 0.016 - 0.050 d 0.189 - 0.197 (4.800 - 5.004) seating plan 0.014 - 0.020 0.150 - 0.157 (3.810 - 3.988) 0.008 - 0.010 (0.203 - 0.254) 8.0 max 0.053 - 0.059 (1.346 - 1.753) 0.004 - 0.010 0.228 - 0.244 (5.791 - 6.198) 0.050 (1.270) typ (0.012 - 0.254)
1 gm6610x series 1.0a ultra low dropout voltage regulators gm6610x v2.06 6 8 10 ordering number g m 66100 -1.8 ta3 r g output voltage package type shipping type apm gamma micro circuit type 1.8 = 1.8v 2.5 = 2.5v 3.3 = 3.3v 5.0 = 5.0v ta3: to263 tb3: to220 tc3: to252 st3: sot223 r:taping& reel t: tube blank: pb-free g:green g m 66101 -1.8 s8 r g output voltage package type shipping type apm gamma micro circuit type 1.8 = 1.8v 2.5 = 2.5v 3.3 = 3.3v 5.0 = 5.0v s8: sop-8 r:taping& reel t:tube blank: pb-free g:green g m 66102 s8 r g output voltage package type shipping type apm gamma micro circuit type adj s8: sop-8 r:taping& reel t:tube blank: pb-free g:green note: pb-free products: ? rohs compliant and compatible with the cu rrent require-ments of ipc/jedec j-std-020. ? suitable for use in pb-free soldering processes with 100% matte tin (sn) plating. green products: ? lead-free (rohs compliant) ? halogen 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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