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analog microelectronics, inc. 1 ame8801/8812/8840 300ma cmos ldo n n n n n typical application n n n n n functional block diagram n n n n n features l very low dropout voltage l guaranteed 300ma output l accurate to within 1.5% l 30 m a quiescent current l over-temperature shutdown l current limiting l short circuit current fold-back l noise reduction bypass capacitor l power-saving shutdown mode l space-saving sot-25 (sot-23-5) package l factory pre-set output voltages l low temperature coefficient n n n n n general description the ame8801/8840 family of positive, linear regulators feature low quiescent current (30 m a typ.) with low drop- out voltage, making them ideal for battery applications. the space-saving sot-23-5 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. in applications requiring a low noise, regulated supply, place a 1000 pf capacitor between bypass and ground. the ame8801 is stable with an output capacitance of 2.2 m f or greater. n n n n n applications l instrumentation l portable electronics l wireless devices l cordless phones l pc peripherals l battery powered widgets l electronic scales amp gnd out in r1 r2 v ref =1.215v byp overcurrent shutdown thermal shutdown en ame8801 output input c3 2.2 m f c1 1 m f gnd out 5v en byp in c2 1nf
analog microelectronics, inc. 2 300ma cmos ldo ame8801/8812/8840 n n n n n pin configuration 1. v in 4. byp 2. gnd 5. out 3. en n n n n n ordering information ame8801 sot-25 top view 13 2 5 4 ame8840 sot-25 top view 13 2 5 4 1. en 4. out 2. gnd 5. v in 3. byp ame8812 sot-25 top view 13 2 5 4 1. en 4. out 2. gnd 5. byp 3. v in ame8801 sot-26 top view 13 2 6 4 5 1. out _ 14.en 2. gnd 5. v in 3. byp 6. out_2 part number marking output voltage package operating temp. range ame8801aeev aafww 3.3v sot-25 -40 o c to +85 o c ame8801beev aagww 3.0v sot-25 -40 o c to +85 o c ame8801ceev aahww 2.8v sot-25 -40 o c to +85 o c ame8801deev aaiww 2.5v sot-25 -40 o c to +85 o c ame8801eeev aajww 3.8v sot-25 -40 o c to +85 o c ame8801feev aboww 3.6v sot-25 -40 o c to +85 o c ame8801geev acfww 3.5v sot-25 -40 o c to +85 o c ame8801heev aegww 2.7v sot-25 -40 o c to +85 o c ame8801ieev aeoww 3.4v sot-25 -40 o c to +85 o c ame8801jeev agqww 2.85v sot-25 -40 o c to +85 o c ame8801keev ahsww 3.7v sot-25 -40 o c to +85 o c ame8801leev ajoww 1.5v sot-25 -40 o c to +85 o c ame8801meev ajpww 1.8v sot-25 -40 o c to +85 o c ame8801neev akoww 2.9v sot-25 -40 o c to +85 o c ame8801oeev akpww 3.1v sot-25 -40 o c to +85 o c ame8801seev aqxww 5.0v sot-25 -40 o c to +85 o c ame8801jeey aruww 2.85v sot-26 -40 o c to +85 o c please consult ame sales office or authorized rep./distributor for other output voltage and package type availability.
analog microelectronics, inc. 3 ame8801/8812/8840 300ma cmos ldo part number output voltage package operating temp. range ame8812 aeev 3.3v sot-25 -40 o c to +85 o c ame8812 beev 3.0v sot-25 -40 o c to +85 o c AME8812CEEV 2.8v sot-25 -40 o c to +85 o c ame8812deev 2.5v sot-25 -40 o c to +85 o c ame8812 eeev 3.8v sot-25 -40 o c to +85 o c ame8812feev 3.6v sot-25 -40 o c to +85 o c ame8812geev 3.5v sot-25 -40 o c to +85 o c ame8812heev 2.7v sot-25 -40 o c to +85 o c ame8812ieev 3.4v sot-25 -40 o c to +85 o c ame8812jeev 2.85v sot-25 -40 o c to +85 o c ame8812 keev 3.7v sot-25 -40 o c to +85 o c ame8812leev 1.5v sot-25 -40 o c to +85 o c ame8812meev 1.8v sot-25 -40 o c to +85 o c ame8812neev 2.9v sot-25 -40 o c to +85 o c ame8812oeev 3.1v sot-25 -40 o c to +85 o c please consult ame sales office or authorized rep./distributor for other output voltage and package type availability. n n n n n ordering information
analog microelectronics, inc. 4 300ma cmos ldo ame8801/8812/8840 n n n n n ordering information part number marking output voltage package operating temp. range ame8840aeev alcww 3.3v sot-25 -40 o c to +85 o c ame8840beev aldww 3.0v sot-25 -40 o c to +85 o c ame8840ceev aleww 2.8v sot-25 -40 o c to +85 o c ame8840deev alfww 2.5v sot-25 -40 o c to +85 o c ame8840eeev algww 3.8v sot-25 -40 o c to +85 o c ame8840feev alhww 3.6v sot-25 -40 o c to +85 o c ame8840geev aliww 3.5v sot-25 -40 o c to +85 o c ame8840heev aljww 2.7v sot-25 -40 o c to +85 o c ame8840ieev alkww 3.4v sot-25 -40 o c to +85 o c ame8840jeev allww 2.85v sot-25 -40 o c to +85 o c ame8840keev almww 3.7v sot-25 -40 o c to +85 o c ame8840leev alnww 1.5v sot-25 -40 o c to +85 o c ame8840meev aloww 1.8v sot-25 -40 o c to +85 o c ame8840neev alpww 2.9v sot-25 -40 o c to +85 o c ame8840oeev alqww 3.1v sot-25 -40 o c to +85 o c please consult ame sales office or authorized rep./distributor for other output voltage and package type availability.
analog microelectronics, inc. 5 ame8801/8812/8840 300ma cmos ldo n n n n n absolute maximum ratings n n n n n recommended operating conditions n n n n n thermal information caution: stress above the listed absolute rating may cause permanent damage to the device maximum unit thermal resistance (q ja )sot-25260 o c / w internal power dissipation (p d ) (dt = 100 o c) sot-25 380 mw thermal resistance (q ja )sot-26260 o c / w internal power dissipation (p d ) (dt = 100 o c) sot-26 380 mw 150 o c maximum junction temperature param ete r 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 parameter rating unit ambient temperature range -40 to +85 o c junction temperature -40 to +125 o c
analog microelectronics, inc. 6 300ma cmos ldo ame8801/8812/8840 n n n n n electronic specifications parameter symbol min typ max units input voltage v in note 1 7 v output voltage accuracy v o -1.5 1.5 % 1.2v1.2v v o >1.2v i o =300ma v o =v onom -2.0% i o =1ma to 300ma m vrms power supply rejection i o =100ma c o =2.2 m f output voltage noise en f=10hz to 100khz i o =10ma co=2.2 m f v in =5v, v o =0v, v en analog microelectronics, inc. 7 ame8801/8812/8840 300ma cmos ldo n n n n n detailed description the ame8801/8840 family of cmos regulators contain a pmos pass transistor, voltage reference, error ampli- fier, 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 300ma. during thermal shutdown, the output voltage remains low. normal op- eration is restored when the junction temperature drops below 120 o c. the ame8801/8840 switches from voltage mode to cur- rent mode when the load exceeds the rated output cur- rent. this prevents over-stress. the ame8801/8840 also incorporates current foldback to reduce power dis- sipation when the output is short circuited. this feature becomes active when the output drops below 0.8volts, and reduces the current flow by 65%. full current is restored when the voltage exceeds 0.8 volts. 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. 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 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 quiescent current is less than 1 m a. this pin behaves much like an electronic switch. n n n n n external capacitors the ame8801/8840 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. conversely, aluminum electrolytic capacitors exhibit the highest esr, resulting in the poorest ac response. unfortunately, large value ceramic capacitors are com- paratively 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 over- all 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.
analog microelectronics, inc. 8 300ma cmos ldo ame8801/8812/8840 0 50 100 150 200 250 300 2.5 2.75 3 3.25 3.5 3.75 4 drop out voltage vs output voltage output voltage (v) drop out voltage (mv) i load =300ma i load =200ma i load =100ma 0 50 100 150 200 250 0 50 100 150 200 250 300 drop out voltage vs load current load current (ma) dropout voltage (mv) top to bottom v out =2.5v v out =2.8v v out =3.0v v out =3.3v v out =3.5v v out =3.8v chip enable transient response output (1v/div) enable (2v/div) time ( 1ms/div) c l =2 m f r l =10 w c byp =1000pf 0 0 0 0 chip enable transient response time ( 1ms/div) c l =2 m f r l =10 w output (1v/div) enable (2v/div) 0 5 10 15 20 25 30 35 40 45 012345678 ground current vs. input voltage ground current ( m m m m a) input voltage (v) 85 o c 25 o c load step ( 1ma-300ma) i l (200ma/div) vo(5mv/div) time( 20ms/div) c l =2.2 m f c in =2.2 m f output i load 0
analog microelectronics, inc. 9 ame8801/8812/8840 300ma cmos ldo overtemperature shutdown v out (1v/div) i out (200ma/div) time (0.5sec/div) r load =6.6 w 0 0 -80 -70 -60 -50 -40 -30 -20 -10 1.0e+01 1.0e+02 1.0e+03 1.0e+04 1.0e+05 1.0e+06 psrr ( db) power supply rejection ratio frequency (hz) c l = 10 m f tantalum i l = 100 ma c byp = 0 c byp = 100 pf c byp = 1 nf c byp = 10 nf -80 -70 -60 -50 -40 -30 -20 -10 1.0e+01 1.0e+02 1.0e+03 1.0e+04 1.0e+05 psrr ( db) power supply rejection ratio frequency (hz) c l = 5.6 m f ceramic i l = 100 ma c byp = 0 c byp = 100 pf c byp = 1 nf c byp = 10 nf -80 -70 -60 -50 -40 -30 -20 1.0e+01 1.0e+03 1.0e+05 1.0e+07 power supply rejection ratio psrr (db) frequency (hz) c l =2.2 m f tantalum c byp =1000pf 100ma 100 m a 1ma 10ma 100ma 100 m a -80 -70 -60 -50 -40 -30 -20 -10 0 1.0e+01 1.0e+03 1.0e+05 1.0e+07 power supply rejection ratio psrr (db) frequency (hz) 100ma 10ma 1ma 100 m a 100ma 100 m a c l =2.2 m f tantalum c byp =0 short circuit response time (2ms/div) v out (1v/div) i load (400ma/div) r load =100 w r short =0.1 w 0 0
analog microelectronics, inc. 10 300ma cmos ldo ame8801/8812/8840 noise measurement time (20ms/div) vo (1mv/ div) transient line response time (2ms/div) v o (1mv/div) v in (1v/div) c l = 2.2 m f v in dc = 5.0v c l = 2.2 m f no filter current limit response v out (1v/div) i out (200ma/div) time (2ms/div) r load =3.3 w 0 0 10 100 300 0.1 1.0 8.0 sot-23-5 safe operating area output current (ma) input-output voltage differential (v)
analog microelectronics, inc. 11 ame8801/8812/8840 300ma cmos ldo 0.01 0.1 1 10 100 1000 10000 0 50 100 150 200 esr ( w w w w ) stable region untested region unstable region iload (ma) c l =1 m f stability vs. esr vs i load 0.01 0.1 1 10 100 1000 10000 0 50 100 150 200 iload (ma) stable region untested region unstable region esr ( w w w w ) c l =2 m f stability vs. esr vs i load 0.01 0.1 1 10 100 1000 10000 0 50 100 150 200 stable region untested region unstable region iload (ma) esr ( w w w w ) c l =3 m f stability vs. esr vs i load 0.001 0.01 0.1 1 10 100 1000 10000 0 50 100 150 200 stable region untested region unstable region iload (ma) esr ( w w w w ) c l =10 m f stability vs. esr vs i load
analog microelectronics, inc. 12 300ma cmos ldo ame8801/8812/8840 quiescent current vs.temp. 27 28 29 30 31 32 33 34 35 -45 -5 25 55 85 temperature ( 0 c) quiescent current @ 5v (ua) load regulation vs. temp. 0.40 0.42 0.44 0.46 0.48 0.50 0.52 0.54 0.56 0.58 -45-5 255585 temperature ( 0 c) load regulation (%) shut down current vs. temp. 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -45 -5 25 55 85 temperature ( 0 c) shut down current (ua) dropout voltage vs. temp. 150 160 170 180 190 200 210 220 -45 -5 25 55 85 temperature ( 0 c) dropout voltage @ 300ma (mv) v out =3v -0.50 -0.45 -0.40 -0.35 -0.30 -0.25 -0.20 -45 -5 25 55 85 temperature ( 0 c) en pin lo bias current (ua) en pin lo bias current vs. temp.
analog microelectronics, inc. 13 ame8801/8812/8840 300ma cmos ldo n n n n n package dimension sot-25 sot-26 min max min max a 1.00 1.45 0.0394 0.0571 a 1 0.00 0.15 0.0000 0.0591 a2 0.70 1.25 0.0276 0.0492 b 0.35 0.55 0.0138 0.0217 c 0.08 0.25 0.0031 0.0098 d 2.70 3.10 0.1063 0.1220 e 1.40 1.80 0.0551 0.0709 e h 2.60 3.00 0.1024 0.1181 l 0.30 - 0.0118 - q1 q1 q1 q1 0 10 0 10 s 1 0.85 1.05 0.0335 0.0413 1.90 bsc 0.07480 bsc symbols millimeters inches min max min max a 1.00 1.40 0.0394 0.0551 a 1 0.00 0.15 0.0000 0.0591 a2 0.70 1.25 0.0276 0.0492 b 0.35 0.50 0.0138 0.0197 c 0.08 0.25 0.0031 0.0098 d 2.70 3.10 0.1063 0.1220 e 1.40 1.80 0.0551 0.0709 e h 2.60 3.00 0.1024 0.1181 l 0.35 - 0.0138 - q q q q 1 0 9 0 9 s 1 0.85 1.05 0.0335 0.0413 1.90 bsc 0.0748 bsc 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. , august 2001 document: 2006-ds8801/8812/8840-e corporate headquarters asia pacific headquarters analog microelectronics, inc. ame, inc. 3100 de la cruz blvd. suite 201 2f, 187 kang-chien road, 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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