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analog microelectronics, inc. 1 ame1084 5a low dropout positive voltage regulator n n n n n functional block diagram n n n n n general description the ame1084 is a 5a low-dropout positive voltage regu- lator. it is available in fixed and adjustable output volt- age versions. overcurrent and thermal protection are integrated onto the chip. output current will limit as it reaches the pre-set current or temperature limit. at full rated output current the dropout voltage is 1.4v (max.). ame1084 series regulators provide excellent regulation over line, load and temperature variations. n n n n n key features l low dropout voltage ? 1.4v at 5a l l l l l adjustable or 3.3v fixed voltage l l l l l line regulation typically 0.015% l l l l l load regulation typically 0.05% l l l l l adjust pin (adj) current less than 90 m a l l l l l overcurrent protection l l l l l thermal protection l l l l l available in to-220, to-263, to-252 n n n n n applications l l l l l high efficiency linear regulators l l l l l post regulators for switching supplies l l l l l 5v to 3.3v voltage converter l l l l l battery charger figure 1 thermal protection bandgap reference current limiting amplifier input output adj/gnd error amp. figure 2 n n n n n typical application ame1084 load 10 m f tan 10 m f tan 4.75v to 5.25v v in gnd v out
analog microelectronics, inc. 2 ame1084 5a low dropout positive voltage regulator to-220 front view to-263-3 front view n n n n n pin configuration v in adj/gnd v out ame1084 1 2 3 ame 1084 adj/gnd v out v in 1 2 3 ame 1084 adj/gnd v out v in to-263-2 front view 1 2 3 ame 1084 adj/gnd v out v in to-252 front view
analog microelectronics, inc. 3 ame1084 5a low dropout positive voltage regulator part num ber marking output voltage package ame1084acbt ame1084 acbt yyww adj to-220 ame1084bcbt ame1084 bcbt yyww 1.5 to-220 ame1084ccbt ame1084 ccbt yyww 2.5 to-220 ame1084dcbt ame1084 dcbt yyww 3.3 to-220 ame1084acdt-3 ame1084 acdt-3 yyww adj to-263-3 ame1084bcdt-3 ame1084 bcdt-3 yyww 1.5 to-263-3 AME1084CCDT-3 ame1084 ccdt-3 yyww 2.5 to-263-3 ame1084dcdt-3 ame1084 dcdt-3 yyww 3.3 to-263-3 ame1084acdt ame1084 acdt yyww adj to-263-2 ame1084bcdt ame1084 bcdt yyww 1.5 to-263-2 AME1084CCDT ame1084 ccdt yyww 2.5 to-263-2 ame1084dcdt ame1084 dcdt yyww 3.3 to-263-2 ame1084accs ame1084 accs yyww adj to-252 ame1084bccs ame1084 bccs yyww 1.5 to-252 ame1084cccs ame1084 cccs yyww 2.5 to-252 ame1084dccs ame1084 dccs yyww 3.3 to-252 n n n n n ordering information
analog microelectronics, inc. 4 ame1084 5a low dropout positive voltage regulator n n n n n absolute maximum ratings symbol maximum unit v in 7v to-220 3 to-252 5 to-263 3 to-220 50 to-252 90 to-263 50 operating junction temperature range t j 0 to 125 storage temperature range t stg -65 to 150 lead temperature (10 sec) t lead 260 parameter input voltage o c thermal resistance (junction to case) thermal resistance (junction to ambient) q jc q ja o c/w
analog microelectronics, inc. 5 ame1084 5a low dropout positive voltage regulator n n n n n electrical characteristics 1. 1084axxx 2. 1084dxxx parameter symbol min. typ. max. units reference voltage v in = 5v t j =25 o c 1.238 1.262 (adjustable voltage) i o = 10ma over temp. 1.225 1.275 v in = 2.75 - 7v t j =25 o c-0.0150.2 i o = 10ma over temp. - 0.035 0.2 v in = 5v t j =25 o c - 0.05 0.3 i o = 10ma - 5a over temp. - 0.2 0.4 dropout voltage v in = 2.75 - 7v t j =25 o c-1.21.4 d v out , d v ref = 1% i o = 10ma - 5a over temp. - 1.3 - current limit i s v in = 2.75 - 7v, over temp. 5.0 - - a temperature coefficient t c v in = 2.75 - 7v, i o = 10ma - 5a - 0.005 - %/ o c v in = 2.75 - 7v t j = 25 o c- 55 - i o = 10ma - 5a over temp. - - 90 v in = 2.75 - 7v, i o = 10ma - 5a over temp. temperature stability t s v in = 5v, i o = 500ma, over temp. 0.5 0.5 - % minimum load current i o v in = 5v - 5 10 ma rms output noise v n t j = 25 o c-0.003-%v o ripple rejection ratio r a v in = 5v, i o = 5a, over temp. 60 72 - db test conditions v d d i adj i adj line regulation load regulation reg line v ref reg load adjust pin current adjust pin current change 0.2 5 - m a 1.250 v v % % parameter symbol min. typ. max. units output voltage v in = 5v t j =25 o c 3.267 3.333 (fixed voltage) i o = 0a over temp. 3.234 3.366 v in = 4.5 - 7v t j =25 o c-0.0150.2 i o = 0a over temp. - 0.035 0.2 v in = 5v t j =25 o c - 0.05 0.3 i o = 0a - 5a over temp. - 0.2 0.4 dropout voltage v in = 4.5 - 7v t j =25 o c-1.21.4 d v out , d v ref = 1% i o = 0a - 5a over temp. - 1.3 - current limit i s v in = 4.5 - 7v, over temp. 5.0 - - a quiescent current (fixed model) temperature coefficient t c v in = 4.5 - 7v, i o = 0a - 5a - 0.005 - %/ 0 c temperature stability t s v in = 5v, i o = 500ma, over temp. 0.5 0.5 - % rms output noise v n - 0.003 - %v o ripple rejection ratio r a v in = 5v, i o = 5a, over temp. 60 72 - db line regulation reg line % test conditions vo 3.300 load regulation reg load % v d v t j = 25 o c i q v in =5v, io=0-5a, over temp. - 13 ma 12 v
analog microelectronics, inc. 6 ame1084 5a low dropout positive voltage regulator n n n n n application description 1. output voltage adjustment like most regulators, the ame1084 regulates the output by comparing the output voltage to an internally generated reference voltage. on the adjustable version, the v ref is available ex- ternally 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: v out = v ref ( 1 + ) + i adj x r2 on fixed versions of ame1084, the voltage di- vider is provided internally. r2 r1 figure 3 3. current limit protection ame1084 is protected against overload conditions. current protection is triggered at typical 7.5a. 4. stability and load regulation ame1084 requires a capacitor from v out to gnd t o provide compensation feedback to the internal gain stage. this is to ensure stability at the output termi- nal. typically, a 10 m f tantalum or 50 m f aluminum electrolytic is sufficient. note: it is important that the esr for this capacitor does not exceed 0.5 w . the output capacitor dose not have a theoretical upper limit and increasing its value will increase stability. c out = 100 m f or more is typical for high cur- rent regulator design. for the adjustable version, the best load regulation is accomplished when the top of the resistor divider (r1) is connected directly to the output pin of the ame1084. when so connected, r p is not multiplied by the divider ratio. for fixed output versions, the top of r1 is internally connected to the output. the ground pin can be con- nected to low side of the load to eliminate ground loop errors. 2. thermal protection ame1084 has thermal protection which limits junction temperature to 150 o c. however, de- vice functionality is only guaranteed to a maxi- mum junction temperature of +125 o c. the power dissipation and junction tempera- ture for ame1084 in to-220 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 figure 4 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 c 1 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. 7 ame1084 5a low dropout positive voltage regulator 5. thermal consideration the ame1084 series contain thermal limiting circuitry designed to protect itself for over- temperature conditions. even for normal load conditions, maximum junction temperature ratings must not be exceed. as mention in thermal protection section, we need to con- sider all sources of thermal resistance be- tween junction and ambient. it includes junc- tion-to-case, case-to-heat-sink interface and heat sink thermal resistance itself. junction-to-case thermal resistance is speci- fied from the ic junction to the bottom of the case directly below the die. proper mounting is required to ensure the best possible ther- mal flow from this area of the package to the heat sink. the case of all devices in this se- ries is electrically connected to the output. therefore, if the case of the device must be electrically isolated, a thermally conductive spacer is recommended.
analog microelectronics, inc. 8 ame1084 5a low dropout positive voltage regulator n n n n n advanced applications * v o = v ref (1 + ) + i adj x r2 ** optional for improved ripple rejection figure 5 adjustable output voltage * 20mw is ballast resistance the inter - connection of #18 wire could act as ballast resistance figure 6 paralleling regulators r2 r1 ame1084 v in = 5v r1 r2 10 m f 10 m f 2k 1k 10 m f ** * v o = 1.5 - 3.45v v out v in adj ame1084 v in r1 r2 10 m f v o ame1084 10 m f i o = 0 to 10a * 20m w * 20m w v out v in gnd v out v in gnd
analog microelectronics, inc. 9 ame1084 5a low dropout positive voltage regulator n n n n n advanced applications (cont.) * v o = v ref + v z (v z : breakdown voltage of zener diode) ** optional for improved ripple rejection figure 7 regulator with reference figure 8 regulator with reverse diode protection * v o ame1084 v in 10 m f 10 m f 1k 10 m f ** zener diode or voltage reference v in v out gnd ame1084 10 m f 100 m f v o * v in v out gnd
analog microelectronics, inc. 10 ame1084 5a low dropout positive voltage regulator n n n n n performance characteristics drop-out voltage vs. load current minimum operation current vs input/output differential voltage output short circuit current vs input/output differential voltage 0 1 2 3 4 5 6 7 0123456789 input/output differential voltage(v) minimum operation current (ma) 0 1 2 3 4 5 6 7 8 9 123456789 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 1.30 012345 load current (a) drop-out volatge (v)
analog microelectronics, inc. 11 ame1084 5a low dropout positive voltage regulator n n n n n external resistor divider table for customized voltage r1(ohm) 100 102 105 107 110 113 115 118 121 124 vo u t 1.25 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.30 3.984 4.063 4.182 4.262 4.381 4.500 4.579 4.698 4.817 4.936 1.35 7.968 8.127 8.365 8.524 8.761 8.999 9.158 9.396 9.633 9.871 1.40 11.95 12.19 12.55 12.79 13.14 13.50 13.74 14.09 14.45 14.81 1.45 15.94 16.25 16.73 17.05 17.52 18.00 18.32 18.79 19.27 19.74 1.50 19.92 20.32 20.91 21.31 21.90 22.50 22.89 23.49 24.08 24.68 1.55 23.90 24.38 25.09 25.57 26.28 27.00 27.47 28.19 28.90 29.61 1.60 27.89 28.44 29.28 29.83 30.67 31.50 32.05 32.88 33.72 34.55 1.65 31.87 32.51 33.46 34.09 35.05 36.00 36.63 37.58 38.53 39.48 1.70 35.86 36.57 37.64 38.36 39.43 40.50 41.21 42.28 43.35 44.42 1.75 39.84 40.63 41.82 42.62 43.81 45.00 45.79 46.98 48.17 49.36 1.80 43.82 44.70 46.01 46.88 48.19 49.50 50.37 51.68 52.98 54.29 1.85 47.81 48.76 50.19 51.14 52.57 54.00 54.95 56.37 57.80 59.23 1.90 51.79 52.82 54.37 55.40 56.95 58.50 59.53 61.07 62.62 64.16 1.95 55.78 56.89 58.55 59.66 61.33 63.00 64.11 65.77 67.43 69.10 2.00 59.76 60.95 62.74 63.93 65.71 67.49 68.68 70.47 72.25 74.03 2.05 63.75 65.01 66.92 68.19 70.09 71.99 73.26 75.17 77.07 78.97 2.10 67.73 69.08 71.10 72.45 74.47 76.49 77.84 79.86 81.88 83.90 2.15 71.71 73.14 75.28 76.71 78.85 80.99 82.42 84.56 86.70 88.84 2.20 75.70 77.21 79.47 80.97 83.23 85.49 87.00 89.26 91.52 93.77 2.25 79.68 81.27 83.65 85.24 87.61 89.99 91.58 93.96 96.33 98.71 2.30 83.67 85.33 87.83 89.50 92.00 94.49 96.16 98.65 101.2 103.6 2.35 87.65 89.40 92.01 93.76 96.38 98.99 100.7 103.4 106.0 108.6 2.40 91.63 93.46 96.20 98.02 100.8 103.5 105.3 108.1 110.8 113.5 2.45 95.62 97.52 100.4 102.3 105.1 108.0 109.9 112.7 115.6 118.5 2.50 99.60 101.6 104.6 106.5 109.5 112.5 114.5 117.4 120.4 123.4 2.55 103.6 105.6 108.7 110.8 113.9 117.0 119.1 122.1 125.2 128.3 2.60 107.6 109.7 112.9 115.1 118.3 121.5 123.6 126.8 130.1 133.3 2.65 111.6 113.8 117.1 119.3 122.7 126.0 128.2 131.5 134.9 138.2 2.70 115.5 117.8 121.3 123.6 127.0 130.5 132.8 136.2 139.7 143.1 2.75 119.5 121.9 125.5 127.9 131.4 135.0 137.4 140.9 144.5 148.1 2.80 123.5 126.0 129.7 132.1 135.8 139.5 141.9 145.6 149.3 153.0 2.85 127.5 130.0 133.8 136.4 140.2 144.0 146.5 150.3 154.1 157.9 2.90 131.5 134.1 138.0 140.6 144.6 148.5 151.1 155.0 159.0 162.9 2.95 135.5 138.2 142.2 144.9 148.9 153.0 155.7 159.7 163.8 167.8 3.00 139.4 142.2 146.4 149.2 153.3 157.5 160.3 164.4 168.6 172.7 3.05 143.4 146.3 150.6 153.4 157.7 162.0 164.8 169.1 173.4 177.7 3.10 147.4 150.3 154.8 157.7 162.1 166.5 169.4 173.8 178.2 182.6 r2(ohm)=(vout-1.25)*r1/(1.25+50u*r1)
analog microelectronics, inc. 12 ame1084 5a low dropout positive voltage regulator n n n n n external resistor divider table for customized voltage r1(ohm) 100 102 105 107 110 113 115 118 121 124 vo u t 3.15 151.4 154.4 158.9 161.9 166.5 171.0 174.0 178.5 183.0 187.5 3.20 155.4 158.5 163.1 166.2 170.8 175.5 178.6 183.2 187.9 192.5 3.25 159.4 162.5 167.3 170.5 175.2 180.0 183.2 187.9 192.7 197.4 3.30 163.3 166.6 171.5 174.7 179.6 184.5 187.7 192.6 197.5 202.4 3.35 167.3 170.7 175.7 179.0 184.0 189.0 192.3 197.3 202.3 207.3 3.40 171.3 174.7 179.8 183.3 188.4 193.5 196.9 202.0 207.1 212.2 3.45 175.3 178.8 184.0 187.5 192.8 198.0 201.5 206.7 211.9 217.2 3.50 179.3 182.9 188.2 191.8 197.1 202.5 206.1 211.4 216.8 222.1 3.55 183.3 186.9 192.4 196.0 201.5 207.0 210.6 216.1 221.6 227.0 3.60 187.3 191.0 196.6 200.3 205.9 211.5 215.2 220.8 226.4 232.0 3.65 191.2 195.0 200.8 204.6 210.3 216.0 219.8 225.5 231.2 236.9 3.70 195.2 199.1 204.9 208.8 214.7 220.5 224.4 230.2 236.0 241.8 3.75 199.2 203.2 209.1 213.1 219.0 225.0 228.9 234.9 240.8 246.8 3.80 203.2 207.2 213.3 217.3 223.4 229.5 233.5 239.6 245.7 251.7 3.85 207.2 211.3 217.5 221.6 227.8 234.0 238.1 244.3 250.5 256.6 3.90 211.2 215.4 221.7 225.9 232.2 238.5 242.7 249.0 255.3 261.6 3.95 215.1 219.4 225.9 230.1 236.6 243.0 247.3 253.7 260.1 266.5 4.00 219.1 223.5 230.0 234.4 240.9 247.5 251.8 258.4 264.9 271.5 4.05 223.1 227.6 234.2 238.7 245.3 252.0 256.4 263.1 269.7 276.4 4.10 227.1 231.6 238.4 242.9 249.7 256.5 261.0 267.8 274.6 281.3 4.15 231.1 235.7 242.6 247.2 254.1 261.0 265.6 272.5 279.4 286.3 4.20 235.1 239.7 246.8 251.4 258.5 265.5 270.2 277.2 284.2 291.2 4.25 239.0 243.8 250.9 255.7 262.8 270.0 274.7 281.9 289.0 296.1 4.30 243.0 247.9 255.1 260.0 267.2 274.5 279.3 286.6 293.8 301.1 4.35 247.0 251.9 259.3 264.2 271.6 279.0 283.9 291.3 298.6 306.0 4.40 251.0 256.0 263.5 268.5 276.0 283.5 288.5 296.0 303.5 310.9 4.45 255.0 260.1 267.7 272.8 280.4 288.0 293.1 300.7 308.3 315.9 4.50 259.0 264.1 271.9 277.0 284.7 292.5 297.6 305.4 313.1 320.8 4.55 262.9 268.2 276.0 281.3 289.1 297.0 302.2 310.1 317.9 325.7 4.60 266.9 272.2 280.2 285.5 293.5 301.5 306.8 314.8 322.7 330.7 4.65 270.9 276.3 284.4 289.8 297.9 306.0 311.4 319.5 327.5 335.6 4.70 274.9 280.4 288.6 294.1 302.3 310.5 315.9 324.2 332.4 340.6 4.75 278.9 284.4 292.8 298.3 306.7 315.0 320.5 328.8 337.2 345.5 4.80 282.9 288.5 297.0 302.6 311.0 319.5 325.1 333.5 342.0 350.4 4.85 286.9 292.6 301.1 306.8 315.4 324.0 329.7 338.2 346.8 355.4 4.90 290.8 296.6 305.3 311.1 319.8 328.5 334.3 342.9 351.6 360.3 4.95 294.8 300.7 309.5 315.4 324.2 333.0 338.8 347.6 356.4 365.2 5.00 298.8 304.8 313.7 319.6 328.6 337.5 343.4 352.3 361.3 370.2 r2(ohm)=(vout-1.25)*r1/(1.25+50u*r1)
analog microelectronics, inc. 13 ame1084 5a low dropout positive voltage regulator n n n n n package dimension to-220 to-263-3 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 9.65 10.41 0.380 0.410 b 8.28 9.65 0.326 0.380 c 4.06 4.83 0.160 0.190 d 0.51 1.02 0.020 0.040 e 1.14 1.40 0.045 0.055 g h 14.61 15.88 0.575 0.625 k 1.02 1.68 0.040 0.066 l 0.00 0.97 0.000 0.038 m 2.49 2.74 0.098 0.108 n 0.43 0.58 0.017 0.023 p 2.29 2.79 0.090 0.110 r 0 o 8 ? 0 o 8 ? s 2.41 2.67 0.095 0.105 w 0.254 0.508 0.010 0.020 * : typical value notes : 1. controlling dim ension : m illim eters. 2m axim um lead thickness includes lead finish thickness minimum lead thickness is the minimum thickness of base m ateria. * 2.54 * 0.100 symbols m illim eters inches
analog microelectronics, inc. 14 ame1084 5a low dropout positive voltage regulator n n n n n package dimension to-263-2 min max min max a 9.65 10.41 0.380 0.410 b 8.28 9.65 0.326 0.380 c 4.06 4.83 0.160 0.190 d 0.51 1.02 0.020 0.040 e 1.14 1.40 0.045 0.055 g h 14.61 15.88 0.575 0.625 k 1.02 1.68 0.040 0.066 l 0.00 0.97 0.000 0.038 m 2.49 2.74 0.098 0.108 n 0.43 0.58 0.017 0.023 p 2.29 2.79 0.090 0.110 r 0 o 8 ? 0 o 8 ? s 2.41 2.67 0.095 0.105 w 0.254 0.508 0.010 0.020 * : typical value notes : 1. controlling dimension : millimeters. 2maximum lead thickness includes lead finish thickness minimum lead thickness is the minimum thickness of base materia. * 2.54 * 0.100 symbols millimeters inches
analog microelectronics, inc. 15 ame1084 5a low dropout positive voltage regulator 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 m illim eters inches min max min max a 0.45 0.58 0.0177 0.023 b 1.60 1.95 0.06 0.0768 c0.51 - 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 to-252 (dpak)
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. , july 2001 document: 1012-doc-b-0704 corporate headquarters asia pacific headquarters analog microelectronics, inc. ame, inc. 3100 de la cruz blvd. suite 201 2f, 187 ,kang-chien rd, nei-hu district 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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