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ame, inc. 1 ame8807 600ma cmos ldo n typical application n functional block diagram l very low dropout voltage l guaranteed 600ma output l accurate to within 1.5% l typical 30 m a ground current l over-temperature shutdown l current limiting l short circuit current fold-back l power-saving shutdown mode l space-saving so-8 package l user adjustable output voltages l low temperature coefficient the ame8807 family of positive, linear regulators fea- ture low ground current (30 m a typ.) with low dropout volt- age, making them ideal for battery applications. the space-saving so-8 package is attractive for "pocket and "hand held" applications. these rugged devices have both thermal shutdown, and current fold-back to prevent device failure under the "worst" of operating conditions. the ame8807 is stable with an output capacitance of 2.2 m f or greater. l instrumentation l portable electronics l wireless devices l cordless phones l pc peripherals l battery powered widgets l electronic scales n general description n features n applications v out = 1.215 ( r1/r2 +1 ) c2 is unnecessary if r1 or r2 < 20 k ohms out in c3 2.2 m m m m f 5v c2 100p r1 r2 c1 1 m m m m f ame8807 in en adj out gnd gnd out in adj overcurrent shutdown thermal shutdown en v ref =1.215v amp
ame, inc. 2 600ma cmos ldo ame8807 n pin configuration ame8807aeha 1. in 2. gnd 3. gnd 4. en 5. adj 6. gnd 7. gnd 8. out so-8 top view so-8 top view n ordering information ame8807beha 1. out 2. adj 3. gnd 4. nc 5. en 6. nc 7. nc 8. in 1 3 24 ame8807 5 6 7 8 1 3 24 ame8807 5 6 7 8 operating temperature range number of pins package type pin configuration special feature ame8807 x x x x x a: 1. in e: -40 o c to 85 o c h: so-8 a: 8 z: lead free 2. gnd 3. gnd 4. en 5. adj 6. gnd 7. gnd 8. out b: 1. out 2. adj 3. gnd 4. nc 5. en 6. nc 7. nv 8. en pin configuration special feature operating temperature range package type number of pins
ame, inc. 3 ame8807 600ma cmos ldo n ordering information (contd.) please consult ame sales office or authorized rep./distributor for other package type availability. part number marking output voltage package operating temp. range ame8807aeha 8807 aeha yyww adjustable so-8 - 40 o c to + 85 o c AME8807AEHAZ 8807 aeha yyww adjustable so-8 - 40 o c to + 85 o c ame8807beha 8807 beha yyww adjustable so-8 - 40 o c to + 85 o c
ame, inc. 4 600ma cmos ldo ame8807 maximum unit 8807aeha 124 8807beha 124 8807aeha 810 8807beha 810 maximum junction temperature 150 o c maximum lead temperature (10 sec) 300 o c o c / w internal power dissipation (p d ) ( d t = 100 o c) mw parameter thermal resistance ( q ja ) parameter rating unit ambient temperature range - 40 to + 85 o c junction temperature - 40 to + 125 o c parameter maximum unit input voltage 8 v output current p d / (v in - v o )a output voltage gnd - 0.3 to v in + 0.3 v esd classification b n absolute maximum ratings n recommended operating conditions n thermal information caution: stress above the listed absolute maximum rating may cause permanent damage to the device
ame, inc. 5 ame8807 600ma cmos ldo parameter symbol min typ max units input voltage v in note 1 7 v output voltage accuracy v o -1.5 1.5 % 1.5v= 2.0v 0.02 0.1 % load regulation reg load 0.2 1 % over temperature shutdown ots 150 o c over temperature hysterisis oth 30 o c v o temperature coefficient tc 30 ppm/ o c f=1khz 50 f=10khz 20 f=100khz 15 adj reference voltage v ref 1.203 1.215 1.227 v 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 1 m a test condition i o =600ma v o =v o(nom) -2.0% see chart dropout voltage v dropout mv v o >1.2v v o >1.2v v o <0.8v i o =1ma to 600ma en input bias current v en =v in , v in =2.7v to 7v v en =0v, v in =2.7v to 7v power supply rejection i o =100ma c o =2.2 m f line regulation v in =5v, v o =0v, v en ame, inc. 6 600ma cmos ldo ame8807 the ame8807 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 150 o c, or the current exceeds 600ma. during thermal shutdown, the output voltage remains low. normal op- eration is restored when the junction temperature drops below 120 o c. the ame8807 switches from voltage mode to current mode when the load exceeds the rated output current. this prevents over-stress. the ame8807 also incorpo- rates current foldback to reduce power dissipation when the output is short circuited. this feature becomes ac- tive when the output drops below 0.8 volts, and reduces the current flow by 65%. full current is restored when the voltage exceeds 0.8 volts. n detailed description n external capacitors the ame8807 is stable with an output capacitor to ground of 2.2 m f or greater. ceramic capacitors have the lowest esr, and will offer the best ac performance. con- versely, aluminum electrolytic capacitors exhibit the high- est esr, resulting in the poorest ac response. unfortu- nately, large value ceramic capacitors are comparatively expensive. 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 in- put and ground to stabilize vin. the input capacitor should be at least 0.1 m f to have a beneficial effect. 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 enable the enable pin normally floats high. when actively, pulled low, the pmos pass transistor shuts off, and all internal circuits are powered down. in this state, the qui- escent current is less than 1 m a. this pin behaves much like an electronic switch. n adj the adj pin is the positive input to the error amplifier which, due to the pmos pass element inversion, means it is actually the negative input of the ldo feedback loop. the feedback works to keep the voltage at the adj pin 1.215v with respect to ground. since the internal cir- cuitry at the adj pin is essentially an esd protected cmos gate the input current at the adj pin is virtually zero.
ame, inc. 7 ame8807 600ma cmos ldo ground current vs. input voltage load step (1ma-600ma) drop out voltage vs. output voltage power supply rejection ratio safe operating area noise measurement 10 100 600 0.1 1.0 8.0 output current (ma) input-output voltage differential (v) 8807aeha 8807beha time (20ms/div) vo (1mv div) c l =2.2 m f no filter ground current ( m m m m a) input voltage (v) 0 5 10 15 20 25 30 35 40 45 012345678 85 o c 25 o c psrr (db) 100ma 10ma 1ma 100 m a 100ma 100 m a c l =2.2 m f tantalum c byp =0 -80 -70 -60 -50 -40 -30 -20 -10 0 10 1k 100k frequency (hz) 10m time ( 20ms/div) i l (200ma/div) vo(10mv/div) i load out put c l =2. 2 m f ci n=2. 2 m f 0 0 200 400 600 800 1000 1200 12 34 5 6 i load =600ma drop out voltage (v) output voltage (v)
ame, inc. 8 600ma cmos ldo ame8807 short circuit response overtemperature shutdown current limit response chip enable transient response line transient response v out (1v/div) i out (200ma/div) time (0.5sec/div) 0 0 r load =6.6 w i out (200ma/div) v out (1v/div) tim e (2ms/div) c load =2.2 m f c in =1.0 m f r load =3.3 w v outnom =3.3v tim e (2ms/div) c load =2.2 m f c in =1 m f r load <100m w v out (1v/div) i out (200mv/div) 0 0 time ( 1ms/div) c l =2 m f r l =10 w output (1v/div) enable (2v/div) v out (10mv/div) v in (1v/div) c load =2.2 m f i load =1ma v outdc =3.3v v indc =4.5v time (200ms/div)
ame, inc. 9 ame8807 600ma cmos ldo n external resistor divider table r1 (k ohm) 12345678910 vout 1.30 14.29 28.59 42.88 57.18 71.47 85.76 100.06 114.35 128.65 142.94 1.35 9.00 18.00 27.00 36.00 45.00 54.00 63.00 72.00 81.00 90.00 1.40 6.57 13.14 19.70 26.27 32.84 39.41 45.97 52.54 59.11 65.68 1.45 5.17 10.34 15.51 20.68 25.85 31.02 36.19 41.36 46.53 51.70 1.50 4.26 8.53 12.79 17.05 21.32 25.58 29.84 34.11 38.37 42.63 1.55 3.63 7.25 10.88 14.51 18.13 21.76 25.39 29.01 32.64 36.27 1.60 3.16 6.31 9.47 12.62 15.78 18.94 22.09 25.25 28.40 31.56 1.65 2.79 5.59 8.38 11.17 13.97 16.76 19.55 22.34 25.14 27.93 1.70 2.51 5.01 7.52 10.02 12.53 15.03 17.54 20.04 22.55 25.05 1.75 2.27 4.54 6.81 9.08 11.36 13.63 15.90 18.17 20.44 22.71 1.80 2.08 4.15 6.23 8.31 10.38 12.46 14.54 16.62 18.69 20.77 1.85 1.91 3.83 5.74 7.65 9.57 11.48 13.39 15.31 17.22 19.13 1.90 1.77 3.55 5.32 7.09 8.87 10.64 12.42 14.19 15.96 17.74 1.95 1.65 3.31 4.96 6.61 8.27 9.92 11.57 13.22 14.88 16.53 2.00 1.55 3.10 4.64 6.19 7.74 9.29 10.83 12.38 13.93 15.48 2.05 1.46 2.91 4.37 5.82 7.28 8.73 10.19 11.64 13.10 14.55 2.10 1.37 2.75 4.12 5.49 6.86 8.24 9.61 10.98 12.36 13.73 2.15 1.30 2.60 3.90 5.20 6.50 7.80 9.10 10.40 11.70 12.99 2.20 1.23 2.47 3.70 4.93 6.17 7.40 8.63 9.87 11.10 12.34 2.25 1.17 2.35 3.52 4.70 5.87 7.04 8.22 9.39 10.57 11.74 2.30 1.12 2.24 3.36 4.48 5.60 6.72 7.84 8.96 10.08 11.20 2.35 1.07 2.14 3.21 4.28 5.35 6.42 7.49 8.56 9.63 10.70 2.40 1.03 2.05 3.08 4.10 5.13 6.15 7.18 8.20 9.23 10.25 2.45 0.98 1.97 2.95 3.94 4.92 5.90 6.89 7.87 8.85 9.84 2.50 0.95 1.89 2.84 3.78 4.73 5.67 6.62 7.56 8.51 9.46 2.55 0.91 1.82 2.73 3.64 4.55 5.46 6.37 7.28 8.19 9.10 2.60 0.88 1.75 2.63 3.51 4.39 5.26 6.14 7.02 7.90 8.77 2.65 0.85 1.69 2.54 3.39 4.23 5.08 5.93 6.77 7.62 8.47 2.70 0.82 1.64 2.45 3.27 4.09 4.91 5.73 6.55 7.36 8.18 2.75 0.79 1.58 2.37 3.17 3.96 4.75 5.54 6.33 7.12 7.92 2.80 0.77 1.53 2.30 3.07 3.83 4.60 5.37 6.13 6.90 7.67 2.85 0.74 1.49 2.23 2.97 3.72 4.46 5.20 5.94 6.69 7.43 2.90 0.72 1.44 2.16 2.88 3.61 4.33 5.05 5.77 6.49 7.21 2.95 0.70 1.40 2.10 2.80 3.50 4.20 4.90 5.60 6.30 7.00 3.00 0.68 1.36 2.04 2.72 3.40 4.08 4.76 5.45 6.13 6.81 3.05 0.66 1.32 1.99 2.65 3.31 3.97 4.63 5.30 5.96 6.62 3.10 0.64 1.29 1.93 2.58 3.22 3.87 4.51 5.16 5.80 6.45 r2(k ohm)=(1.215*r1(k ohm))/(vout-1.215)
ame, inc. 10 600ma cmos ldo ame8807 n external resistor divider table r1 (k ohm) 12345678910 vout 3.15 0.63 1.26 1.88 2.51 3.14 3.77 4.40 5.02 5.65 6.28 3.20 0.61 1.22 1.84 2.45 3.06 3.67 4.28 4.90 5.51 6.12 3.25 0.60 1.19 1.79 2.39 2.99 3.58 4.18 4.78 5.37 5.97 3.30 0.58 1.17 1.75 2.33 2.91 3.50 4.08 4.66 5.24 5.83 3.35 0.57 1.14 1.71 2.28 2.85 3.41 3.98 4.55 5.12 5.69 3.40 0.56 1.11 1.67 2.22 2.78 3.34 3.89 4.45 5.00 5.56 3.45 0.54 1.09 1.63 2.17 2.72 3.26 3.81 4.35 4.89 5.44 3.50 0.53 1.06 1.60 2.13 2.66 3.19 3.72 4.25 4.79 5.32 3.55 0.52 1.04 1.56 2.08 2.60 3.12 3.64 4.16 4.68 5.20 3.60 0.51 1.02 1.53 2.04 2.55 3.06 3.57 4.08 4.58 5.09 3.65 0.50 1.00 1.50 2.00 2.49 2.99 3.49 3.99 4.49 4.99 3.70 0.49 0.98 1.47 1.96 2.44 2.93 3.42 3.91 4.40 4.89 3.75 0.48 0.96 1.44 1.92 2.40 2.88 3.36 3.83 4.31 4.79 3.80 0.47 0.94 1.41 1.88 2.35 2.82 3.29 3.76 4.23 4.70 3.85 0.46 0.92 1.38 1.84 2.31 2.77 3.23 3.69 4.15 4.61 3.90 0.45 0.91 1.36 1.81 2.26 2.72 3.17 3.62 4.07 4.53 3.95 0.44 0.89 1.33 1.78 2.22 2.67 3.11 3.55 4.00 4.44 4.00 0.44 0.87 1.31 1.75 2.18 2.62 3.05 3.49 3.93 4.36 4.05 0.43 0.86 1.29 1.71 2.14 2.57 3.00 3.43 3.86 4.29 4.10 0.42 0.84 1.26 1.68 2.11 2.53 2.95 3.37 3.79 4.21 4.15 0.41 0.83 1.24 1.66 2.07 2.48 2.90 3.31 3.73 4.14 4.20 0.41 0.81 1.22 1.63 2.04 2.44 2.85 3.26 3.66 4.07 4.25 0.40 0.80 1.20 1.60 2.00 2.40 2.80 3.20 3.60 4.00 4.30 0.39 0.79 1.18 1.58 1.97 2.36 2.76 3.15 3.54 3.94 4.35 0.39 0.78 1.16 1.55 1.94 2.33 2.71 3.10 3.49 3.88 4.40 0.38 0.76 1.14 1.53 1.91 2.29 2.67 3.05 3.43 3.81 4.45 0.38 0.75 1.13 1.50 1.88 2.25 2.63 3.00 3.38 3.76 4.50 0.37 0.74 1.11 1.48 1.85 2.22 2.59 2.96 3.33 3.70 4.55 0.36 0.73 1.09 1.46 1.82 2.19 2.55 2.91 3.28 3.64 4.60 0.36 0.72 1.08 1.44 1.79 2.15 2.51 2.87 3.23 3.59 4.65 0.35 0.71 1.06 1.41 1.77 2.12 2.48 2.83 3.18 3.54 4.70 0.35 0.70 1.05 1.39 1.74 2.09 2.44 2.79 3.14 3.49 4.75 0.34 0.69 1.03 1.37 1.72 2.06 2.41 2.75 3.09 3.44 4.80 0.34 0.68 1.02 1.36 1.69 2.03 2.37 2.71 3.05 3.39 4.85 0.33 0.67 1.00 1.34 1.67 2.01 2.34 2.67 3.01 3.34 4.90 0.33 0.66 0.99 1.32 1.65 1.98 2.31 2.64 2.97 3.30 4.95 0.33 0.65 0.98 1.30 1.63 1.95 2.28 2.60 2.93 3.25 5.00 0.32 0.64 0.96 1.28 1.61 1.93 2.25 2.57 2.89 3.21 r2(k ohm)=(1.215*r1(k ohm))/(vout-1.215)
ame, inc. 11 ame8807 600ma cmos ldo n package dimension so-8 min max min max a 1.35 1.75 0.05315 0.0689 a 1 0.10 0.25 0.00394 0.00984 a2 b 0.33 0.51 0.01299 0.02008 c 0.19 0.25 0.00748 0.00984 d 4.80 5.00 0.18898 0.19685 e 3.80 4.00 0.14961 0.15748 e l 0.40 1.27 0.01575 0.05 y - 0.10 - 0.004 0 o 8 o 0 o 8 o 1.473 ref 0.058 ref 1.27 bsc 0.050 bsc symbols millimeters inches 7 o (4x) c top view side view front view d e l a a2 a1 e b c
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. , november 2003 document: 2006-ds8807-j 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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