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analog microelectronics, inc. 1 ame1117 1a low dropout positive voltage regulator n n n n n typical application n n n n n general descriptions the ame1117 is a 1a low-dropout positive voltage regu- lator. it is available in fixed and adjustable output voltage versions. overcurrent and thermal protection are integrated onto the chip. output current will limit as while it reaches the pre-set current or temperature limit. the dropout voltage is specified at 1.4v maxi- mum at full rated output current. the ame1117 series provides excellent regulation over line, load and tem- perature variations. n n n n n applications l high efficiency linear regulators l 5v to 3.3v voltage converter l battery charger l post regulators for switching supplies n n n n n functional block diagram figure 1 n n n n n key features l low dropout voltage ..............1.2v at 1a l adjustable or fixed voltages 2.5v, 3.3v, 5.0v l typical line regulation ....... 0.2% l typical load regulation ...... 0.15% l adjust pin current less than 90 m a l overcurrent protection l thermal protection l available in to-220, to-252, sot-223 input range depends on v out please refer to electrical characteristics. figure 2 thermal protection bandgap reference current limiting amplifier input output adj/com error amp. 10 m f tan 4.75v to 12v load 10 m f tan ame1117 gnd
analog microelectronics, inc. 2 ame1117 1a low dropout positive voltage regulator n n n n n pin configuration v in adj/gnd v out ame1117 to-220 front view sot-223 front view 1 2 3 ame 1117 adj/gnd v out v in 1 2 3 ame 1117 adj/gnd v out v in to-252 ( dpak-2) front view to-252 ( dpak-2) front view ame1117 1 2 3 adj/gnd v out v in
analog microelectronics, inc. 3 ame1117 1a low dropout positive voltage regulator n n n n n ordering information part number marking output voltage package ame1117acgt abeyww adj ame1117bcgt akeyww 2.5 ame1117ccgt abfyww 3.3 ame1117dcgt akfyww 5.0 ame1117acct ame1117 acct yyww adj ame1117bcct ame1117 bcct yyww 2.5 AME1117CCCT ame1117 ccct yyww 3.3 ame1117dcct ame1117 dcct yyww 5.0 ame1117acbt ame1117 acbt yyww adj ame1117bcbt ame1117 bcbt yyww 2.5 ame1117ccbt ame1117 ccbt yyww 3.3 ame1117dcbt ame1117 dcbt yyww 5.0 sot-223 to-220 to-252 (dpak-2)
analog microelectronics, inc. 4 ame1117 1a low dropout positive voltage regulator n n n n n absolute maximum ratings n n n n n electrical characteristics ame1117axxx parameter symbol min. typ. max. unit t j = 25 o c 1.238 1.250 1.262 over temp. 1.225 1.250 1.275 t j = 25 o c - 0.05 0.3 over temp. - 0.2 0.4 t j = 25 o c -1.21.4 over temp. - 1.3 - current limit i s v in = 2.75~7v over temp. 1.0 - - a temp. coefficient t c v in = 2.75~7v, i o = 10ma~1a - 0.005 - %/oc t j = 25 o c -55 - over temp. - 90 adjust pin current change temperature stability t s v in = 5v, i o = 100ma, over temp. -0.5 % minimum load current i o v in = 5v -510ma rms output noise v n t j = 25 o c -0.003 - %v o ripple rejection ratio r a v in = 5v, i o = 1a, over temp. 60 72 - db --0.2 dropout voltage v d i o = 10ma~1a, d vo = 1% - reference voltage v ref v adjust pin current i adj line regulation * load regulation % v in = 5v, i o = 10ma~1a test conditions v in = 2.75~7v, i o = 10ma~1a v in = 5v, i o = 10ma d i adj v in = 2.75~7v, i o = 10ma~1a, over temp. reg load reg line v in = 4.75~7v, i o = 10ma t j = 25 o c m a 5 0.2 v symbol maximum unit v in 7v to-220 2.5 to-252 5 sot-223 15 to-220 50 to-252 90 sot-223 160 operating junction temperature range t j 0 to 125 t stg -65 to 150 t lead 260 o c/w thermal resistance (junction to ambient) q ja o c storage temperature range lead temperature (10 sec) parameter input voltage thermal resistance (junction to case) q jc
analog microelectronics, inc. 5 ame1117 1a low dropout positive voltage regulator *line regulation test circuit ame1117bxxx parameter symbol min. typ. max. unit t j = 25 o c 2.475 2.500 2.525 over temp. 2.450 2.500 2.550 t j = 25 o c - 0.05 0.3 over temp. - 0.2 0.4 t j = 25 o c- 1.21.4 over temp. - 1.3 - current limit i s v in = 4.75~7v, over temp. 1.0 - - a quiescent current i q v in = 5v, i o = 0a~1a, over temp. - 6 13 ma temp. coefficient t c v in = 4.75~7v, i o = 0a~1a - 0.005 - %/oc temperature stability t s v in = 5v, i o = 100ma, over temp. - 0.5 - % rms output noise v n t j = 25 o c - 0.003 - %v o ripple rejection ratio r a v in = 5v, i o = 1a, over temp. 60 72 - db - - 0.2 dropout voltage v d i o = 0a~1a, d vo = 1% reg load v in = 5v, i o = 0a~1a v in = 4.75~7v, i o = 0a t j = 25 o c v test conditions output voltage v o v in = 5v, i o = 0a v line regulation reg line % load regulation ame1117cxxx parameter symbol min. typ. max. unit t j = 25 o c 3.270 3.300 3.330 over temp. 3.234 3.300 3.366 t j = 25 o c - 0.05 0.3 over temp. - 0.2 0.4 t j = 25 o c- 1.21.4 over temp. - 1.3 - current limit i s v in = 4.75~7v, over temp. 1.0 - - a quiescent current i q v in = 5v, i o = 0a~1a, over temp. - 6 13 ma temp. coefficient t c v in = 4.75~7v, i o = 0a~1a - 0.005 - %/oc temperature stability t s v in = 5v, i o = 100ma, over temp. - 0.5 - % rms output noise v n t j = 25 o c - 0.003 - %v o ripple rejection ratio r a v in = 5v, i o = 1a, over temp. 60 72 - db v i o = 0a~1a, d vo = 1% test conditions output voltage v o dropout voltage v d % v v in = 5v, i o = 0a load regulation line regulation v in = 5v, i o = 0a~1a reg line reg load v in = 4.75~7v, i o = 0a t j = 25 o c- - 0.2
analog microelectronics, inc. 6 ame1117 1a low dropout positive voltage regulator figure 3 out adj in v in v out 10 m tan 164 100 10 m tan ame1117dxxx parament symbol min. typ. max. unit t j = 25 o c 4.950 5.000 5.050 over temp. 4.900 5.000 5.100 t j = 25 o c --0.3 over temp. - - 0.4 t j = 25 o c - 0.05 0.3 over temp. - 0.2 0.4 t j = 25 o c- 1.21.4 over temp. - 1.3 - current limit i s v in = 7~10v, over temp. 1.0 - - a quiescent current i q v in = 7v, i o = 0a~1a, over temp. - 6 13 ma temp. coefficient t c v in = 7~10v, i o = 0a~1a - 0.005 - %/oc temperature stability t s v in = 7v, i o = 100ma, over temp. - 0.5 - % rms output noise v n t j = 25 o c - 0.003 - %v o ripple rejection ratio r a v in = 7v, i o = 1a, over temp. 60 72 - db v dropout voltage v d i o = 0a~1a, d vo = 1% test conditions v in = 7v, i o = 0a v in = 7~9v, i o = 0a line regulation reg line % v in = 7v, i o = 0a~1a output voltage v v o load regulation reg load
analog microelectronics, inc. 7 ame1117 1a low dropout positive voltage regulator n n n n n performance characteristics 3. temperature stablilty 2. short circuit current 4. dropout voltage 1. load regulation 0.0 0.5 1.0 1.5 2.0 2.5 3.0 12345678910 input/output differential voltage(v) output short circuit current (a ) 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 0 0.2 0.4 0.6 0.8 1 load current (a) drop-out voltage (v ) -0.25 -0.20 -0.15 -0.10 -0.05 0.00 -50-30-101030507090 temperature ( o c) output voltage deviation (% 1.238 1.240 1.242 1.244 1.246 1.248 1.250 1.252 -50 -25 0 25 50 75 100 125 temperature ( o c) reference voltage (v )
analog microelectronics, inc. 8 ame1117 1a low dropout positive voltage regulator 5. adjust pin current 7. load transient response 6. minimum operating current 8. line transient response time ( m s) 0 1 2 3 4 5 6 7 0123456789 input/output differential voltage(v) minimum operation current (m a 0 5 10 15 20 25 30 35 40 45 -50 -25 0 25 50 75 100 125 temperature( o c) adjust pin current ( m a)
analog microelectronics, inc. 9 ame1117 1a low dropout positive voltage regulator n n n n n application descriptions like most regulators, the ame1117 regulates the output by comparing the output voltage to an inter- nally generated reference voltage. on the adjust- able version, the v ref is available externally as 1.25v between v out and adj. the voltage ratio formed by r1 and r2 should be set to conduct 10ma (minimum output load). the output voltage is given by the following equation: 1. output voltage adjustment v out = v ref (1+ r2 r1 ) + i ad j x r2 on fixed versions of ame1117, the voltage divider is provided internally. figure 4 2. thermal protection ame1117 has thermal protection which limits junction temperature to 150 o c. however, device functionality is only guaranteed to a maximum junction temperature of +125 o c. the power dissipation and junction temperature for ame1117 in dpak package are given by p d = (v in - v out ) x i out t junction = t ambient + ( p d x q ja ) note: t junction must not exceed 125 o c 3. current limit protection ame1117 is protected against overload conditions. current protection is triggered at typically 1.5a. ame1117 requires a capacitor from v out to gnd to provide compensation feedback to the internal gain stage. this is to ensure stability at the output terminal. typically, a 10 m f tantalum or 50 m f alu- minum electrolytic is sufficient. note: it is important that the esr for this capacitor does not exceed 0.5 w . the output capacitor does not have a theoretical upper limit and increasing its value will increase stability. c out = 100 m f or more is typical for high current regulator design. for the adjustable version, the best load regulation is accomplished when the top of the resistor di- vider (r1) is connected directly to the output pin of the ame1117. when so connected, r p is not mul- tiplied by the divider ratio. for fixed output versions, the top of r1 is internally connected to the output. the ground pin can be connected to the low side of the load in order to eliminate ground loop errors. 4. stability and load regulation figure 5 c 1 v out = v ref (1+ r2 r1 ) + i adj x r2 out adj in v ref i adj 50 m a v in v out r1 r2 out adj in v in r1 r2 r l r p parasitic line resistance connect r2 to load (connect r1 to case)
analog microelectronics, inc. 10 ame1117 1a low dropout positive voltage regulator 5. thermal consideration the ame1117 series contain thermal limiting cir- cuitry designed to protect itself from over-tem- perature conditions. even for normal load condi- tions, maximum junction temperature ratings must not be exceeded. as mentioned in thermal protec- tion section, we need to consider all sources of thermal resistance between junction and ambient. it includes junction-to-case, case-to-heat-sink in- terface and heat sink thermal resistance itself. junction-to-case thermal resistance is specified from the ic junction to the bottom of the case di- rectly below the die. proper mounting is required to ensure the best possible thermal flow from this area of the package to the heat sink. the case of all devices in this product series is electrically con- nected to the output. therefore, if the case of the device must be electrically isolated, a thermally con- ductive spacer is recommended.
analog microelectronics, inc. 11 ame1117 1a low dropout positive voltage regulator n n n n n advanced applications adjustable output voltage paralleling regulators * v o = vref (1 + r2/r1) + iadj x r2 ** optional for improved ripple rejection ame1117 10 m f v in = 5v 10 m f 10 m f * v o = 1.5 ~ 3.45v r1 2k ** r2 1k v in v out adj * 20m w is ballast resistance the inter-connection of #18 wire could act as ballast resistance. ame1117 10 m f v in 10 m f v o ame1117 * 20m w * 20m w i o = 0 to 2a v in v out gnd v in v out gnd
analog microelectronics, inc. 12 ame1117 1a low dropout positive voltage regulator regulator with reference regulator with reverse diode protection ame1117 10 m f v in 100 m f * v o v out v in gnd * v o = vref + v z (v z is breakdown voltage of zener diode) ** optional for improved ripple rejection ame1117 10 m f v in 10 m f 10 m f * v o zener diode or voltage reference ** 1k v in v out adj
analog microelectronics, inc. 13 ame1117 1a low dropout positive voltage regulator n n n n n package dimension to-220 sot-223 min max min max a 4.06 4.83 0.160 0.190 b 0.63 1.02 0.025 0.040 c1 0.35 0.60 0.0138 0.0236 d 14.22 14.99 0.056 0.590 e 9.66 10.54 0.385 0.415 e - 2.79 - 0.110 e1 4.83 5.33 0.190 0.210 e3 1.14 1.40 0.045 0.055 f 1.14 1.40 0.045 0.055 h1 5.94 6.55 0.234 0.258 k 2.29 2.92 0.090 0.115 cp 3.71 3.96 0.146 0.156 q 2.62 2.87 0.103 0.113 l 12.70 14.27 0.500 0.5618 a 3d7d3d7d b1 1.14 1.52 0.0449 0.06 r notes : 1. dime ns ion c1 apply for tin plate finis h. 2. for s olde r dip le ad finis h dime ns ion c1 s hould be 0.015"-0.027" (0.38-0.69) 6.17 ref. 0.243 ref. symbols millimeters inches min max min max a 1.50 1.80 0.0591 0.0709 a 1 0.02 0.10 0.0008 0.0039 b 0.60 0.838 0.0236 0.033 b 1 2.895 3.15 0.1140 0.1240 c 0.24 0.381 0.0094 0.0150 d 6.299 6.706 0.2480 0.2640 e 3.30 3.708 0.1299 0.1460 e e 1 h 6.70 7.30 0.2638 0.2874 l l 1 l 2 a 0 ? 10 ? 0 ? 10 ? 0.91 min 0.0360 min 2.00 max 0.06 bsc 0.0024 bsc 0.0787 max 2.30 bsc 4.60 bsc 0.090 bsc 0.181 bsc millimeters inches symbols a
analog microelectronics, inc. 14 ame1117 1a low dropout positive voltage regulator to-252 (dpak) n n n n n package dimension to-252 (dpak) min max min max a 0.45 0.58 0.0177 0.023 b 1.60 1.95 0.06 0.0768 c 0.51 - 0.02 - d 0.45 0.60 0.0177 0.0236 e 6.40 6.80 0.252 0.2677 f 5.40 5.80 0.2126 0.2283 g 2.20 2.85 0.0866 0.1122 h - * 2.30 - * 0.0906 i - 0.90 - 0.0354 j - 0.97 - 0.038 k 5.20 5.50 0.20 0.22 l 0.89 2.03 0.035 0.08 * : typical value notes : 1. controlling dimension : millimeters. 2. maximum lead thickness includes lead finish thickness minimum lead thickness is the minimum thickness of base material. symbols millimeters inches min max min max a 0.45 0.58 0.0177 0.023 b 1.60 1.95 0.06 0.0768 c 0.51 - 0.02 - d 0.45 0.60 0.0177 0.0236 e 6.40 6.80 0.252 0.2677 f 5.40 5.80 0.2126 0.2283 g 2.20 2.85 0.0866 0.1122 h - * 2.30 - * 0.0906 i - 0.90 - 0.0354 j - 0.97 - 0.038 k 5.20 5.50 0.20 0.22 l 0.89 2.03 0.035 0.08 * : typical value notes : 1. controlling dimension : millimeters. 2. maximum lead thickness includes lead finish thickness minimum lead thickness is the minimum thickness of base material. symbols millimeters inches
life support policy: these products of analog microelectronics, inc. are not authorized for use as critical components in life- support devices or systems, without the express written approval of the president of analog microelectronics, inc. analog microelectronics, inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. ? analog microelectronics, inc. , december, 2001 document: 1014-ds1117-c corporate headquarters asia pacific headquarters analog microelectronics, inc. ame, inc. 3100 de la cruz blvd. suite 201 2f, 187 kang-chien road, nei-hu dist., santa clara, ca. 95054-2046 taipei 114 taiwan, r.o.c. tel : (408) 988-2388 tel : 886 2 2627-8687 fax: (408) 988-2489 fax : 886 2 2659-2989 www.analogmicro.com e-mail: info@analogmicro.com

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