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ame, inc. 1 ame8816 1.5a cmos ldo n n n n n typical application n n n n n functional block diagram (fixed versions) n n n n n features l very low dropout voltage l guaranteed 1.5a output l accurate to within 1.5% l 45 m a quiescent current typically l over-temperature shutdown l current limiting l short circuit current fold-back l noise reduction bypass capacitor (fixed versions) l power-saving shutdown mode l space-saving ddpak-5 package l 6 factory pre-set output voltages l low temperature coefficient l adjustable version n n n n n general description the ame8816 family of positive, linear regulators fea- ture low quiescent current (45 m a typ.) with low dropout voltage, making them ideal for battery applications. output voltages are set at the factory and trimmed to 1.5% accuracy. these rugged devices have both thermal shutdown, and current fold-back to prevent device failure under the "worst" of operating conditions. in applications requiring a low noise, regulated supply, place a 1000pf capacitor between bypass and ground. the ame8816 is stable with an output capacitance of 4.7 m f or greater. n n n n n applications l instrumentation l portable electronics l wireless devices l pc peripherals l battery powered widgets ame8816 out c3 4.7m f c1 1 m f gnd out 5v en byp in c2 1nf in n n n n n functional block diagram (adjustable version) overcurrent shutdown thermal shutdown amp gnd out in r1 r2 1.242v en bypass (external) (external) overcurrent shutdown thermal shutdown amp in 1.242v gnd out r1 r2 en adj
ame, inc. 2 1.5a cmos ldo ame8816 6 7 1 2 3 8 5 4 o n n n n n pin configuration 1. en 2. v in 3. gnd 4. v out 5. byp to-263(ddpak-5) top view 12345 ame8816 aedvxxx yyww 1. byp 2. gnd 3. gnd 4. en 5. v in 6. gnd 7. gnd 8. v out 1. adj 2. gnd 3. gnd 4. en 5. v in 6. gnd 7. gnd 8. v out 8816 aehaxxx yyww so-8 top view 6 7 1 2 3 8 5 4 o 1. en 2. v in 3. gnd 4. v out 5. adj 12345 ame8816 bedvadj yyww 8816 behaadj yyww 6 7 1 2 3 8 5 4 o 8816 cehaadj yyww 1. en 2. v in 3. v out 4. adj 5. gnd 6. gnd 7. gnd 8. gnd
ame, inc. 3 ame8816 1.5a cmos ldo n n n n ame8816 orderin g information ddpak-5 so-8 1.50 ame8816aedv150 ame8816aeha150 1.80 ame8816aedv180 ame8816aeha180 2.50 ame8816aedv250 AME8816AEHA250 3.30 ame8816aedv330 ame8816aeha330 4.75 ame8816aedv475 ame8816aeha475 5.00 ame8816aedv500 ame8816aeha500 adj ame8816bedvadj ame8816behaadj adj ame8816cehaadj please consult ame sales office or authorized rep./distr. for other output voltage and package type or pinout availability. v out package type
ame, inc. 4 1.5a cmos ldo ame8816 n n n n absolute m aximum ratings: parameter maximum unit input voltage 8 v output current p d / (v in - v o ) ma output voltage gnd - 0.3 to v in + 0.3 v esd classification b caution: stress above the listed absolute maximum rating may cause permanent damage to the device. n n n n recommended operating conditions: parameter rating unit ambient temperature range -40 to +85 o c junction temperature -40 to +125 o c n n n n thermal information maximum unit to-263 (ddpak-5) 5 so-8 20** to-263 (ddpak-5) 3.00 so-8 2.50 150 o c 300 o c * assuming a heat sink capable of twice times ( q jc ) ** estimated maximum lead temperature ( 10 sec) parameter thermal resistance ( q jc ) o c / w internal power dissipation (p d ) ( d t = 100 o c)* w maximum junction temperature
ame, inc. 5 ame8816 1.5a cmos ldo n n n n n electrical specifications param eter symbol min typ max units input voltage v in note 1 7 v output voltage accuracy v o -1.5 1.5 % 1.5v v o >= 2.0v -0.1 0.02 0.1 % 4.0v <= v o -0.4 0.4 % load regulation reg load -1 0.2 1 % over temerature shutdown ots 150 o c over temerature hysterisis oth 30 o c v o temperature coefficient tc 30 ppm/ o c adj input bias current i adj 1 m a adj reference voltage v ref 1.223 1.242 1.261 v f=1khz 50 psrr f=10khz 20 db f=100khz 15 f=1khz 75 psrr f=10khz 55 db f=100khz 30 v eh 2.0 vin v v el 00.4v i eh 0.1 m a i el 0.5 m a shutdown supply current i sd 0.5 2 m a note1.v in(min) =v out +v dropout note2.v o(nom) : nominal output voltage of fixed version v in = 5v , v o =0v, v en =0v co=4.7 m f30 co=4.7 m f30 en input threshold en input bias current v in = 7v v en =0v, v in = 7v output voltage noise en f=10hz to 100khz i o =10ma,c by p =0.01 m f m vrms output voltage noise en f=10hz to 100khz i o =10ma,c by p =0 m f m vrms power supply rejection i o =100ma c o =4.7 m f ceramic power supply rejection i o =100ma c o =4.7 m f ceramic c by p =0.01 m f v in = 5v , v adj = 1.242v i o =1ma to 1.5a line regulation reg line i o =1ma v in =v o +1 to v o +2 v o >1.2v v o <0.4v i o =0ma i o =1ma to 1.5a i o =1.5a v o =v onom -2.0% see chart mv v o >1.2v test condition v en = v eh min, i o =1ma v in = v o(nom) +2v, v en = v in , ta = 25 o c unless otherwise noted
ame, inc. 6 1.5a cmos ldo ame8816 n n n n n detailed description the ame8816 family of cmos regulators contain a pmos pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown. the p-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal pro- tection circuits. during normal operation, the error am- plifier compares the output voltage to a precision refer- ence. over-current and thermal shutdown circuits be- come active when the junction temperature exceeds 140 o c, or the current exceeds 2.2a. during thermal shutdown, the output voltage remains low. normal op- eration is restored when the junction temperature drops below 120 o c. the ame8816 behaves like a current source when the load reaches 2.2a. however, if the load impedance drops below 0.3 ohms, the current drops back to 600ma to prevent excessive power dissipation. normal op- eration is restored when the load resistance exceeds 0.75 ohms. all capacitors should be placed in close proximity to the pins. a "quiet" ground termination is desirable. this can be achieved with a "star" connection. n n n n n external capacitors the ame8816 is stable with an output capacitor to ground of 4.7 m f or greater. ceramic capacitors have the lowest esr, and will offer the best ac performance. conversely, aluminum electrolytic capacitors exhibit the highest esr, resulting in the poorest ac response. unfortunately, large value ceramic capacitors are comparatively expen- sive. one option is to parallel a 0.1 m f ceramic capacitor with a 10 m f aluminum electrolytic. the benefit is low esr, high capacitance, and low overall cost. a second capacitor is recommended between the input and ground to stabilize vin. the input capacitor should be at least 0.1 m f to have a beneficial effect. a third capacitor can be connected between the by- pass pin and gnd. this capacitor can be a low cost polyester film variety between the value of 0.001 ~ 0.01 m f. a larger capacitor improves the ac ripple re- jection, but also makes the output come up slowly. this "soft" turn-on is desirable in some applications to limit turn-on surges. n n n n n enable when pulled low, the pmos pass transistor shuts off, and all internal circuits are powered down. in this state, the quiescent current is less than 1 m a. this pin behaves much like an electronic switch. 100kohm resistor is necessary between v en source and en pin when v en is higher than v in. note: there is no internal pull-up for en pin. n n n n n adjustable version the adjustable version uses external feedback resistors to generate an output voltage anywhere from 1.5v to 5.0v. vadj is trimmed to 1.242v and vout is given by the equation: vout = vadj ( 1 + r1 / r2 ) feedback resistors r1 and r2 should be high enough to keep quiescent current low, but increasing r1 + r2 will reduce stability. in general, r1 and r2 in the 10s of k w will produce adequate stability, given reasonable lay- out precautions. to improve stability characteristics, keep
ame, inc. 7 ame8816 1.5a cmos ldo 34.5 35 35.5 36 36.5 37 37.5 38 38.5 0 0.25 0.5 0.75 1 1.25 1.5 ground current vs. load current ground current ( m m m m a) load current (ma) v in = 2.5v v out = 1.5v 10 15 20 25 30 35 40 45 50 2345678 ground current vs. v in ground current ( m m m m a) v in (v) i out = 140ma v out = 1.5v 0 0.2 0.4 0.6 0.8 1 1.2 0 0.3 0.6 0.9 1.2 1.5 1.8 dropout voltage vs. i load dropout voltage (v) i load (a) 1.8 1.5 2.0 2.1 2.8 3.3 v out = 0 0.2 0.4 0.6 0.8 1 02468 dropout voltage vs. v out dropout voltage (v) v out (v) i load =1.5a i load =1.0a i load =0.5a 25 27 29 31 33 35 37 39 41 -45 -5 25 55 85 115 temperature ( 0 c) quiescent current @ 5v (ua) quiescent current vs. temperature
ame, inc. 8 1.5a cmos ldo ame8816 2.475 2.480 2.485 2.490 2.495 2.500 -45-525 5585115 temperature ( 0 c) output voltage (v) v out vs. temperature (2.5v) 0.00 0.05 0.10 0.15 0.20 0.25 0.30 -45 -5 25 55 85 115 temperature ( 0 c) load regulation (%) load regulation vs. temperature 0 50 100 150 200 250 300 350 400 0.3 0.6 0.9 1.2 1.5 load current (a) dropout voltage @ 1.5a (mv) dropout voltage vs. load current (2.5v) 115 0 c 85 0 c 55 0 c 25 0 c -5 0 c -45 0 c 1.235 1.236 1.237 1.238 1.239 1.240 1.241 1.242 1.243 1.244 -45 -5 25 55 85 115 temperature ( 0 c) vadj (v) ame8816beha vadj vs temperature
ame, inc. 9 ame8816 1.5a cmos ldo 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 2345678 short circuit current vs. v in short circuit current (a) v in (v) c in = 4.7 m f c out = 4.7 m f overtemperature shutdown v out 1v/div i out 1a/div time 100ms/div 0v 0a v in = 4v c in = 4.7 m f c out = 4.7 m f 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 2345678 current limit vs. v in current limit (a) v in (v) c in = 4.7 m f c out = 4.7 m f v out = 1.8v current limit response i load 1a/div v out 1v/div time 1ms/div i lim i sc 0a 0v v in = 5v c in = 4.7 m f c out = 4.7 m f transient line response v out (50mv/div) v in (2v/div) time (20 m m m m s/div) c in = 4.7 m f c out = 4.7 m f t r = t f = 1 m s vout = 1.5v 0v load step 40ma to 1.5a i load 1a/div v out 10mv/div time 500 m m m m s/div 0a c in = 4.7 m f c out = 4.7 m f v in = 4.0v v out = 1.8v
ame, inc. 10 1.5a cmos ldo ame8816 0.01 0.1 1 10 100 1000 10000 0 250 500 750 1000 1250 1500 c l esr ( w w w w ) stable region untested region unstable region iload (ma) c l =5 m f stability vs. esr vs i load 0.01 0.1 1 10 100 1000 10000 0 250 500 750 1000 1250 1500 iload (ma) stable region untested region unstable region c l esr ( w w w w ) c l =2 m f stability vs. esr vs i load 0.001 0.01 0.1 1 10 100 1000 10000 0 250 500 750 1000 1250 1500 stable region untested region unstable region iload (ma) c l esr ( w w w w ) c l =10 m f stability vs. esr vs i load
ame, inc. 11 ame8816 1.5a cmos ldo r1(kohm) 1.00 2.00 5.00 10.00 20.00 50.00 100.00 200.00 500.00 1000.00 vout 1.30 21.41 42.83 107.07 214.14 428.28 1070.69 1.35 11.50 23.00 57.50 115.00 230.00 575.00 1.40 7.86 15.72 39.30 78.61 157.22 393.04 1.45 5.97 11.94 29.86 59.71 119.42 298.56 597.55 1.50 4.81 9.63 24.07 48.14 96.28 240.70 481.68 962.79 1.55 4.03 8.06 20.16 40.32 80.65 201.62 403.44 806.49 1.60 3.47 6.94 17.35 34.69 69.39 173.46 347.07 693.85 1.65 3.04 6.09 15.22 30.44 60.88 152.21 304.52 608.82 1.70 2.71 5.42 13.56 27.12 54.24 135.59 271.27 542.36 1.75 2.44 4.89 12.22 24.45 48.90 122.24 244.56 488.98 1.80 2.23 4.45 11.13 22.26 44.52 111.29 222.64 445.16 1.85 2.04 4.09 10.21 20.43 40.86 102.14 204.33 408.55 1.90 1.89 3.78 9.44 18.88 37.75 94.38 188.80 377.51 1.95 1.75 3.51 8.77 17.54 35.08 87.71 175.46 350.85 877.12 2.00 1.64 3.28 8.19 16.39 32.77 81.93 163.88 327.70 819.26 2.05 1.54 3.07 7.69 15.37 30.74 76.86 153.74 307.43 768.56 2.10 1.45 2.90 7.24 14.48 28.95 72.38 144.78 289.51 723.78 2.15 1.37 2.74 6.84 13.68 27.36 68.39 136.81 273.57 683.92 2.20 1.30 2.59 6.48 12.96 25.93 64.82 129.67 259.29 648.23 2.25 1.23 2.46 6.16 12.32 24.64 61.61 123.23 246.43 616.07 2.30 1.17 2.35 5.87 11.74 23.48 58.70 117.41 234.78 586.96 2.35 1.12 2.24 5.60 11.21 22.42 56.05 112.11 224.19 560.47 2.40 1.07 2.15 5.36 10.73 21.45 53.63 107.27 214.51 536.27 2.45 1.03 2.06 5.14 10.28 20.56 51.41 102.83 205.63 514.07 2.50 0.99 1.97 4.94 9.87 19.75 49.36 98.74 197.46 493.64 2.55 0.95 1.90 4.75 9.50 18.99 47.48 94.97 189.91 474.77 2.60 0.91 1.83 4.57 9.15 18.29 45.73 91.47 182.92 457.29 914.58 2.65 0.88 1.76 4.41 8.82 17.64 44.11 88.22 176.42 441.05 882.10 2.70 0.85 1.70 4.26 8.52 17.04 42.59 85.19 170.37 425.93 851.85 2.75 0.82 1.65 4.12 8.24 16.47 41.18 82.37 164.72 411.80 823.61 2.80 0.80 1.59 3.99 7.97 15.94 39.86 79.73 159.44 398.59 797.18 2.85 0.77 1.54 3.86 7.72 15.45 38.62 77.25 154.48 386.19 772.39 2.90 0.75 1.50 3.75 7.49 14.98 37.45 74.92 149.82 374.55 749.10 2.95 0.73 1.45 3.64 7.27 14.54 36.36 72.72 145.43 363.58 727.17 3.00 0.71 1.41 3.53 7.06 14.13 35.32 70.65 141.30 353.24 706.48 3.05 0.69 1.37 3.43 6.87 13.74 34.35 68.70 137.39 343.47 686.95 3.10 0.67 1.34 3.34 6.68 13.37 33.42 66.85 133.69 334.23 668.46 r2(kohm)=(1.242*r1(kohm))/(vout-1.242) n n n n n external resistor divider table
ame, inc. 12 1.5a cmos ldo ame8816 n n n n n external resistor divider table (contd.) r1(kohm) 1.00 2.00 5.00 10.00 20.00 50.00 100.00 200.00 500.00 1000.00 vout 3.15 0.65 1.30 3.25 6.51 13.02 32.55 65.09 130.19 325.47 650.94 3.20 0.63 1.27 3.17 6.34 12.69 31.72 63.43 126.86 317.16 634.32 3.25 0.62 1.24 3.09 6.19 12.37 30.93 61.85 123.71 309.26 618.53 3.30 0.60 1.21 3.02 6.03 12.07 30.17 60.35 120.70 301.75 603.50 3.35 0.59 1.18 2.95 5.89 11.78 29.46 58.92 117.84 294.59 589.18 3.40 0.58 1.15 2.88 5.76 11.51 28.78 57.55 115.11 287.77 575.53 3.45 0.56 1.13 2.81 5.63 11.25 28.13 56.25 112.50 281.25 562.50 3.50 0.55 1.10 2.75 5.50 11.00 27.50 55.00 110.01 275.02 550.04 3.55 0.54 1.08 2.69 5.38 10.76 26.91 53.81 107.63 269.06 538.13 3.60 0.53 1.05 2.63 5.27 10.53 26.34 52.67 105.34 263.36 526.72 3.65 0.52 1.03 2.58 5.16 10.32 25.79 51.58 103.16 257.89 515.78 3.70 0.51 1.01 2.53 5.05 10.11 25.26 50.53 101.06 252.64 505.29 3.75 0.50 0.99 2.48 4.95 9.90 24.76 49.52 99.04 247.61 495.22 3.80 0.49 0.97 2.43 4.86 9.71 24.28 48.55 97.11 242.77 485.54 3.85 0.48 0.95 2.38 4.76 9.52 23.81 47.62 95.25 238.11 476.23 3.90 0.47 0.93 2.34 4.67 9.35 23.36 46.73 93.45 233.63 467.27 3.95 0.46 0.92 2.29 4.59 9.17 22.93 45.86 91.73 229.32 458.64 4.00 0.45 0.90 2.25 4.50 9.01 22.52 45.03 90.07 225.16 450.33 4.05 0.44 0.88 2.21 4.42 8.85 22.12 44.23 88.46 221.15 442.31 4.10 0.43 0.87 2.17 4.35 8.69 21.73 43.46 86.91 217.28 434.57 4.15 0.43 0.85 2.14 4.27 8.54 21.35 42.71 85.42 213.55 427.10 4.20 0.42 0.84 2.10 4.20 8.40 20.99 41.99 83.98 209.94 419.88 4.25 0.41 0.83 2.06 4.13 8.26 20.64 41.29 82.58 206.45 412.90 4.30 0.41 0.81 2.03 4.06 8.12 20.31 40.61 81.23 203.07 406.15 4.35 0.40 0.80 2.00 4.00 7.99 19.98 39.96 79.92 199.81 399.61 4.40 0.39 0.79 1.97 3.93 7.87 19.66 39.33 78.66 196.64 393.29 4.45 0.39 0.77 1.94 3.87 7.74 19.36 38.72 77.43 193.58 387.16 4.50 0.38 0.76 1.91 3.81 7.62 19.06 38.12 76.24 190.61 381.22 4.55 0.38 0.75 1.88 3.75 7.51 18.77 37.55 75.09 187.73 375.45 4.60 0.37 0.74 1.85 3.70 7.40 18.49 36.99 73.97 184.93 369.86 4.65 0.36 0.73 1.82 3.64 7.29 18.22 36.44 72.89 182.22 364.44 4.70 0.36 0.72 1.80 3.59 7.18 17.96 35.92 71.83 179.58 359.17 4.75 0.35 0.71 1.77 3.54 7.08 17.70 35.40 70.81 177.02 354.05 4.80 0.35 0.70 1.75 3.49 6.98 17.45 34.91 69.81 174.54 349.07 4.85 0.34 0.69 1.72 3.44 6.88 17.21 34.42 68.85 172.12 344.24 4.90 0.34 0.68 1.70 3.40 6.79 16.98 33.95 67.91 169.76 339.53 4.95 0.33 0.67 1.67 3.35 6.70 16.75 33.50 66.99 167.48 334.95 5.00 0.33 0.66 1.65 3.30 6.61 16.52 33.05 66.10 165.25 330.49 r2(kohm)=(1.242*r1(kohm))/(vout-1.242) note: small load(greater than 2 ma) is necessary as r1 or r2 is larger than 50 kohm. otherwise, output voltage probably cannot be pulled down to 0 v on disable mode.
ame, inc. 13 ame8816 1.5a cmos ldo n n n n n package dimension to-263 (ddpak-5) so-8 front view top view side view min max min max a 10.05 10.31 0.396 0.406 b 8.28 8.53 0.326 0.336 c 4.31 4.57 0.170 0.180 d 0.66 0.91 0.026 0.036 e 1.14 1.40 0.045 0.055 g h 14.73 15.75 0.580 0.620 k 1.40 1.68 0.000 0.066 l 0.00 0.25 0.055 0.010 m 2.49 2.74 0.000 0.108 n 0.43 0.58 0.098 0.023 p 2.29 2.79 0.017 0.110 r 0 o 8 o 0 o 8 o s 2.41 2.67 0.095 0.105 w symbols mi lli meters i nches 1.70 ref 0.067 ref 0.25 0.01 min max min max a 1.35 1.75 0.053 0.069 a 1 0.10 0.25 0.004 0.010 a2 b 0.33 0.51 0.013 0.020 c 0.19 0.25 0.007 0.010 d 4.80 5.00 0.189 0.1970 e 3.80 4.00 0.150 0.157 e h 5.80 6.20 0.228 0.244 l 0.40 1.27 0.016 0.050 y - 0.10 - 0.004 q q q q 0 o 8 o 0 o 8 o 1.45 ref 0.057 ref 1.27 bsc 0.050 bsc symbols mi lli meters i nches q top view side view front view
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 2002 document: 2013-ds8816-c u.s. headquarters corporate headquarters analog microelectronics, inc. ame, inc. 3100 de la cruz blvd. suite 201 2f, 189 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.ame.com.tw e-mail: info@ame.com.tw

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