ame, inc. 1 ame1505 high power bipolar linear ldo n typical application n functional block diagram l low dropout voltage --- 750mv at 5a l adjustable or 1.25~3.7v fixed voltage l line regulation 3 mv maximum l load regulation 5mv maximum l adjust pin (adj) current less than 120 m a l dual voltage supplies is recommended l overcurrent protection l available in to-220-5, to-263-5 the ame1505 is a 5a low-dropout positive voltage regu- lator. the dropout voltage of ame1505 is 750mv at maxi- mum output current. the output voltage is preset at fac- tory. it is available in fixed and adjustable output voltage versions. the fixed voltage range could expand from 1.25v to 3.7v, where 5v and 3.3v voltage supplies are avail- able. ame1505 has 2 new features: first, a remote sense pin is wired out to eliminate output voltage variation due to load changes. secondly, an extra control pin is avail- able to effectively decrease vin to vo drop. it greatly improves the power dissipation. overcurrent and thermal protection are integrated onto the chip. output current will limit as it reaches the pre- set current. ame1505 series have excellent regulation over line, load and temperature variations. l vga card supplies l post regulators for switching supplies l microprocessor supply l chipset supplies l lcd monitor power n general description n features n applications thermal protection bandgap reference current limiting amplifier v control output adj/gnd error amp. sense v power 2.5v ame1505 v power adj v out v control v sense v ref 3.3v 5.0v gnd 100 ohm 100 ohm
ame, inc. 2 high power bipolar linear ldo ame1505 n pin configuration ame1505acdvxxx 1. sense 2. adj / gnd 3. output 4. v control 5. v power to-220-5 front view to-263-5 front view ame1505acbvxxx 1. sense 2. adj / gnd 3. output 4. v control 5. v power n ordering information amexxxx ame1505 35 12 4 please consult ame sales office or authorized rep./distributor for other voltage accuracy and package type avail- ability. 13 2 ame1505 45 part number marking output voltage package operating temp. range AME1505ACBVADJ ame1505 acbvadj yyww adj to-220-5 0 o to 70 o c ame1505acbv150 ame1505 acbv150 yyww 1.5 to-220-5 0 o to 70 o c ame1505acbv250 ame1505 acbv250 yyww 2.5 to-220-5 0 o to 70 o c ame1505acbv330 ame1505 acbv330 yyww 3.3 to-220-5 0 o to 70 o c ame1505acdvadj ame1505 acdvadj yyww adj to-263-5 0 o to 70 o c ame1505acdv150 ame1505 acdv150 yyww 1.5 to-263-5 0 o to 70 o c ame1505acdv250 ame1505 acdv250 yyww 2.5 to-263-5 0 o to 70 o c ame1505acdv330 ame1505 acdv330 yyww 3.3 to-263-5 0 o to 70 o c
ame, inc. 3 ame1505 high power bipolar linear ldo symbol maximum unit v power 7 v control 13 to-220-5 3 to-263-5 3 to-220-5 50 to-263-5 62.5 t j 0 to 125 t stg - 65 to 150 t lead 260 v parameter thermal resistance (junction to case) input voltage q jc o c/w thermal resistance (junction to ambient) q ja o c operating junction temperature range storage temperature range lead temperature (10 sec) n absolute maximum ratings caution: stress above the listed absolute maximum rating may cause permanent damage to the device
ame, inc. 4 high power bipolar linear ldo ame1505 parameter symbol min typ max units 1.238 1.262 1.225 1.275 1.485 1.515 1.470 1.530 2.475 2.525 2.450 2.550 3.267 3.333 3.234 3.366 line regulation reg line 15mv load regulation reg load 15mv control dropout ( v control - vo ) 1.30 1.45 power dropout ( v power - vo ) 0.45 0.75 minimum load current (adj only) imin 5 10 ma control pin current 50 85 ma ground pin current 610 ma adj pin current 50 120 m a current limit i s 5.0 7.5 - a temperature coefficient t c -0.005- %/ o c temperature stability t s 0.5 0.5 - % ripple rejection ratio r a 60 80 - db v v control = 4.8v, vpower=4.1v, io= 10ma ~ 5a v ref 1.250 v 1.5v v control = 2.75v, vpower=2v, io=10ma 1.500 v control = 3v, vpower=2.3v, io= 10ma ~ 5a v control = 5v, vpower=3.3v, io=10ma v control = v power = vo + 2.5v, v ripple = 1v p-p , io =2a test condition v d 2.5v 3.3v reference voltage (adjustable voltage) v control = 2.75 ~ 12v, vpower=3.3 ~ 5.5v, io=10ma ~ 5a output voltage v control = 4v, vpower=3.3v, io=10ma 2.500 v control = 4v, vpower=3.3v, io= 10ma ~ 5a v control = 5.8v, vpower=3.8v, io=10ma 3.300 io=10ma, 1.5v<= (v control -v out ) =< 12v, 0.8v<= (v power -v out ) =< 5.5v v control =vout +2.5v, v power = v out +0.8v io=10 ma ~ 5a v power = vo + 0.8v, io=5a v v control = vo + 2.5v, io=5a v in - vo = 5v v in = 2.75 - 7v, i o = 10ma - 5a v in = 5v, i o = 500ma, over temp. v control = 5v, v power = 3.3v, v adj = 0v v control = vo + 2.5v, v power = vo + 0.8v, io = 10ma ~ 5a v control = vo + 2.5v, v power = vo + 0.8v, io = 10ma ~ 5a v control = 2.75v, v power = 2.05v, io =10ma n electrical specifications electrical characteristics at i o =0ma, and tj=25 o c unless otherwise specified
ame, inc. 5 ame1505 high power bipolar linear ldo 1. output voltage adjustment like most regulators, the ame1505 regulates the out- put by comparing the output voltage to an internally gen- erated reference voltage. on the adjustable 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: v out = v ref ( 1 + ) + i adj x r2 on fixed versions of ame1505, the voltage divider is factory-preset internally. n application description r2 r1 2. current limit protection ame1505 is protected against overload conditions. cur- rent protection is triggered at typical 7.5a. 3. stability and load regulation ame1505 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. typi- cally, 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 ex- ceed 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 current regulator de- sign. 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 ame1505. 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. r1 r2 r l r p parasitic line resistance connect r2 to load (connect r1 to case) sense adj v power out v control v power v control v out = v ref (1+ r2 r1 ) + i adj x r2 adj v ref i adj v in r1 r2 c 1 sense v power out v control
ame, inc. 6 high power bipolar linear ldo ame1505 4. thermal consideration the ame1505 series contain thermal limiting circuitry designed to protect itself for over-temperature conditions. even for normal load conditions, maximum junction tem- perature ratings must not be exceeded. as mention in thermal protection section, we need to consider all sources of thermal resistance between junction and am- bient. 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 directly 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 series is electrically connected to the output. therefore, if the case of the device must be electrically isolated, a ther- mally conductive spacer is recommended.
ame, inc. 7 ame1505 high power bipolar linear ldo n external resistor divider table for customized voltage r1 (ohm) 100 102 105 107 110 113 115 118 121 124 vout 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)
ame, inc. 8 high power bipolar linear ldo ame1505 n external resistor divider table for customized voltage (contd.) r1 (ohm) 100 102 105 107 110 113 115 118 121 124 vout 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)
ame, inc. 9 ame1505 high power bipolar linear ldo n package dimension to-263-5 min max min max a 10.050 10.668 0.396 0.420 b 8.280 9.169 0.326 0.361 c 4.310 4.597 0.170 0.181 d 0.660 0.910 0.026 0.036 e 1.140 1.400 0.045 0.055 g h 14.605 15.875 0.575 0.625 k 1.143 1.680 0.045 0.066 l 0.000 0.305 0.000 0.012 n 0.330 0.580 0.013 0.023 p 2.280 2.800 0.090 0.110 r 0 o 8 o 0 o 8 o w 1.70ref 0.067 ref 0.25ref 0.01ref symbols millimeters inches d front view w top view side view c g h a b k r e p n min max min max a 2.616 ref 2.870 ref 0.103 ref 0.113 ref b 10.160 10.668 0.400 0.420 c 3.708 3.962 0.146 0.156 d 8.915 9.169 0.351 0.361 e 12.700 14.732 0.500 0.580 f 1.575 1.829 0.062 0.072 g 0.711 0.965 0.028 0.038 h 4.343 4.597 0.171 0.181 i 1.143 1.397 0.045 0.055 j 14.859 15.113 0.585 0.595 k 2.032 3.048 0.080 0.120 l 0.305 0.457 0.012 0.018 symbols millimeters inches to-220-5 a b c d e f g top view side view h i j k l
life support policy: these products of ame, inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of ame, inc. ame, 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. ? ame, inc. , january 2004 document: 2039-ds1505-e corporate headquarter u.s.a. (subsidiary) ame, inc. analog microelectronics, inc. 2f, 189 kang chien road, nei-hu district 3100 de la cruz blvd., suite 201 taipei 114, taiwan, r.o.c. santa clara, ca. 95054-2046 tel : 886 2 2627-8687 tel : (408) 988-2388 fax: 886 2 2659-2989 fax: (408) 988-2489 www.ame.com.tw e-mail: sales@ame.com.tw
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