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ame 1 ame8831 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application rev.h.05 n typical application l guaranteed 150ma output l dropout voltage typically 150 mv at 150 ma l 17 m a quiescent current l over-temperature shutdown l over-current limitation l noise reduction bypass capacitor l power-saving shutdown mode l space-saving sot-25 package l factory pre-set output voltages l enable pin option l enb active low enable l en active high enable l all ame' s lead free products meet rohs standards the ame8831 family of positive, linear regulators fea- ture low quiescent current (17 m a typ.) with low dropout voltage, making them ideal for battery applications. the space-saving sot-25 package is attractive for ? pocket ? and ? hand held ? applications. these rugged devices have both thermal shutdown, and current limitation to prevent device failure under the ? worst ? of operating conditions. in applications requires a low noise regulated supply. the ame8831 family uses the sr pin to program the output voltage ? s slew rate to control the in-rush current. this is specifically used in the usb application where large load capacitance is present at start-up. the ame8831 also features a logic-enabled sleep mode to shutdown the regulator, reducing quiescent current to 1 m a typical at t a = 25 o c. the ame8831 is stable with an output capacitance of 4.7 m f or larger. n general description n features n applications l instrumentation l portable electronics l wireless devices l cordless phones l pc peripherals l battery powered widgets l electronic scales n function block diagram * ame8831a: enb, ame8831b: en amp current limit / thermal protection 10 k gnd sr v in v out v ref r1 r2 * enb or en 4.7 m f + 1 m f ame8831a gnd out in enb sr 0.01 m f v in 1 m f ame8831b gnd out in en sr 4.7 m f + 0.01 m f v in
ame 2 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application ame8831 rev.h.05 n pin configuration 1 3 2 5 4 ame8831 sot-25 top view ame8831a 1. in 2. gnd 3. enb 4. sr 5. out * die attach: conductive epoxy n pin description sot-25 top view 1 3 2 5 4 ame8831 ame8831b 1. in 2. gnd 3. en 4. sr 5. out * die attach: conductive epoxy pin number pin name pin description 1 in input voltage pin. it should be decoupled with 1 m f or greater capacitor. 2 gnd ground connection pin. en enable pin. when pulled low, the pmos pass transistor turns off, current consuming less than 1a. enb enable bar pin. when pulled high, the pmos pass transistor turns off, current consuming less than 1a. 4 sr the sr(slew rate) terminal is used to control the v out in-rush current. 5 out ldo voltage regulator output pin. it should be decoupled with a 1f or greater value low esr ceramic capacitor. 3
ame 3 ame8831 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application rev.h.05 n ordering information operating ambient temperature range number of pins package type pin configuration special feature ame8831 x x x x xxx x voltage a: 1. in e: -40 o c to +85 o c e: sot-2x v: 5 180: v=1.8v y: lead free & low profile (sot-25) 2. gnd 250: v=2.5v z: lead free 3. enb 285: v=2.85v 4. sr 300: v=3.0v 5. out 330: v=3.3v b: 1. in (sot-25) 2. gnd 3. en 4. sr 5. out special feature pin configuration output voltage operating ambient temperature range package type number of pins
ame 4 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application ame8831 rev.h.05 n ordering information note: ww represents the date code and pls refer to the date code rule before package dimension. * a line on top of the first character represents lead free plating such as bdvww. please consult ame sales office or authorized rep./distributor for output voltage and package type availability. part number marking* output voltage package operating ambient temperature range ame8831aeev180z bikww 1.8v sot-25 - 40 o c to +85 o c AME8831AEEV180Y bikww 1.8v tsot-25 - 40 o c to +85 o c ame8831aeev250z bilww 2.5v sot-25 - 40 o c to +85 o c ame8831aeev250y bilww 2.5v tsot-25 - 40 o c to +85 o c ame8831aeev285z bihww 2.85v sot-25 - 40 o c to +85 o c ame8831aeev285y bihww 2.85v tsot-25 - 40 o c to +85 o c ame8831aeev300z bimww 3.0v sot-25 - 40 o c to +85 o c ame8831aeev300y bimww 3.0v tsot-25 - 40 o c to +85 o c ame8831aeev330z bdvww 3.3v sot-25 - 40 o c to +85 o c ame8831aeev330y bdvww 3.3v tsot-25 - 40 o c to +85 o c ame8831beev180z beyww 1.8v sot-25 - 40 o c to +85 o c ame8831beev180y beyww 1.8v tsot-25 - 40 o c to +85 o c ame8831beev250z bfjww 2.5v sot-25 - 40 o c to +85 o c ame8831beev250y bfjww 2.5v tsot-25 - 40 o c to +85 o c ame8831beev285z bezww 2.85v sot-25 - 40 o c to +85 o c ame8831beev285y bezww 2.85v tsot-25 - 40 o c to +85 o c ame8831beev300z bfaww 3.0v sot-25 - 40 o c to +85 o c ame8831beev300y bfaww 3.0v tsot-25 - 40 o c to +85 o c ame8831beev330z bfbww 3.3v sot-25 - 40 o c to +85 o c ame8831beev330y bfbww 3.3v tsot-25 - 40 o c to +85 o c
ame 5 ame8831 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application rev.h.05 n absolute maximum ratings n recommended operating conditions caution: stress above the listed absolute maximum rating may cause permanent damage to the device *hbm c: 4000v+ parameter maximum unit input voltage 6 v output current p d / (v in - v out ) ma output voltage gnd-0.3 to v in +0.3 v esd classification c* parameter symbol rating unit ambient temperature range t a - 40 to +85 junction temperature range t j - 40 to +125 storage temperature range t stg -65 to +150 o c * measure q jc on center of molding compound if ic has no tab. ** mil-std-202g 210f n thermal information parameter package die attach symbol maximum unit thermal resistance* (junction to case) q jc 81 thermal resistance (junction to ambient) q ja 260 internal power dissipation p d 400 mw 150 o c 350 o c conductive epoxy maximum junction temperature solder iron (10 sec)** o c / w sot-25
ame 6 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application ame8831 rev.h.05 n electrical specifications note1 : v in(min) = v out + v dropout(max) note2 : continuous output current and operating junction temperature are limited by internal protection circuitry, but it is not recommended that the device operate under conditions beyond those specified in this table for extended periods of time. over operating temperature range(t j =-40 o c to +125 o c), v in =v out(nom) + 1v, or v in =v in(min) whichever is greater, i out =1ma, v en =v in (v enb =0), and c out =4.7uf, c in =1uf unless otherwise noted. typical values are at t a =25 o c. parameter symbol min typ max units input voltage v in note1 5.5 v -1.5 1.5 -3 3 -0.30 0.2 0.3 -0.40 0.4 -0.25 0.15 0.25 -0.35 0.35 -0.25 0.15 0.25 -0.35 0.35 -0.25 0.15 0.25 -0.35 0.35 -0.2 0.1 0.2 -0.3 0.3 output current i out 150 ma output current limit i lim 200 350 750 ma 17 25 30 load regulation = v out(nom) output voltage accuracy reg load 10 m a<=i out <=150ma quiescent current i q t a =25 o c m a v out =0v t a =25 o c 10 m a ame 7 ame8831 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application rev.h.05 n electrical specifications (contd.) parameter symbol min typ max units 800 850 900 450 500 550 350 400 450 250 350 400 150 250 300 over temerature shutdown ots 150 over temerature hysterisis oth 20 v out temperature coefficient tc 30 ppm en or enb input bias current i en 0.1 1 m a shutdown current i sd 1 2 m a 20 200 450 65 v in =2.5v to 5.5v 1.4 0 t a =25 o c thermal shutdown increasing t a =25 o c t j =-40 o c to +125 o c t a =25 o c t j =-40 o c to +125 o c enb=v in , en=0 v in =2.5v to 5.5v v out =3.3v, f=1 khz, i out = 100ma c out =10 m f c (sr) =0.01 m f enb=0, en=v in v in =2.5v to 5.5v t a =25 o c bw=200hz to 100khz i out =150ma c out =10 m f, c (sr) =0.47 m f ms start up time t str v out =3.3v r load =22 w c out =10 m f c sr =0.01 m f c sr =0.1 m f c sr =0.22 m f t a =25 o c v m vrms d b v in 0.3 o c 100 test condition t j =-40 o c to +125 o c mv t a =25 o c t j =-40 o c to +125 o c t a =25 o c enb and en input threshold power supply ripple rejection psrr output voltage noise v enbh v enh v enbl v enl e n v do dropout voltage @ v out = v out (nom)-2%v out (nom) v out(nom) =2.5v i out =150ma v out(nom) =2.85v i out =150ma v out(nom) =3v i out =150ma v out(nom) =3.3v i out =150ma v out(nom) =1.8v i out =150ma t j =-40 o c to +125 o c t a =25 o c
ame 8 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application ame8831 rev.h.05 n detail description the ame8831 family of cmos regulators contain a pmos pass transistor, voltage reference, error ampli- fier, over-current protection, and thermal shutdown func- tion. the p-channel pass transistor receives data from the error amplifier, over-current limit, and thermal pro- tection circuits. during normal operation, the error amplifier compares the output voltage to a precision reference. over-current and thermal shutdown circuits become active when the junction temperature exceeds 150 o c, or the current exceeds about 350ma. during thermal shutdown, the output voltage remains low. normal operation is restored when the junction tem- perature drops below 120 o c. the ame8831 switches from voltage mode to cur- rent mode when the load exceeds the rated output current. this prevents over-stress. n external capacitors the ame8831 is stable with an output capacitor to ground of 4.7 m f or greater. ceramic capacitors have the lower esr, and will offer the best ac performance. conversely, aluminum electrolytic capacitors exhibit the higher esr, resulting in the poor 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 overall cost. a second capacitor is recommended between the input and ground to stabilize v in . 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 is optional. en for active high en- able, enb for active low enable. when disable the enable pin en=0, enb=v in , the pmos pass transis- tor shuts off, and all internal circuits are powered down. in this state, the standby current is less than 1 m a.
ame 9 ame8831 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application rev.h.05 dropout voltage vs. temperature quiescent current vs temperature output impedance vs frequency output voltage vs load current 3.19 3.2 3.21 3.22 3.23 3.24 3.25 3.26 0 15 30 45 60 75 90 105 120 135 150 load current (ma) o u t p u t v o l t a g e ( v ) v in =4.3v t j =25 j 0 5 10 15 20 25 30 -40 -20 -5 25 55 85 125 temperature ( o c) q u i e s c e n t c u r r e n t ( u a ) i o =1ma i o =150ma 0.1 1 10 100 1000 10000 100000 frequency (hz) n o i s e ( m v / ?? h z ) i o =1ma i o =150ma v in =4.3v c out =4.7 m f c (sr) =0.47 m f output noise spectral density 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 100 1000 10000 100000 1000000 frequency (hz) o u t p u t i m p e d a n c e i o =50ma i o =150ma v in =4.3v c o =4.7 m f ripple rejection vs frequency 0 20 40 60 80 100 120 100 1000 10000 100000 1000000 frequency (hz) r i p p l e r e j e c t i o n ( d b ) i o =1ma i o =150ma v in =4.3v v out =3.3v c out =10 m f c (sr) =0.47 m f 0 50 100 150 200 250 300 -40 -20 25 85 125 temperature ( o c) d r o p o u t v o l t a g e ( m v ) i o =150ma v in =4.3v
ame 10 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application ame8831 rev.h.05 time (20 m s/div) 5.3 4.3 i n p u t v o l t a g e ( v ) o u t p u t v o l t a g e ( m v ) line transient response time (20 m s/div) 200 100 0 0 -50 o u t p u t c u r r e n t ( m a ) o u t p u t v o l t a g e ( m v ) v in =4.3v v out =3.3v c o =10 m f t j =25 o c load transient response output voltage, enable voltage vs time (start-up) e n a b l e v o l t a g e ( v ) o u t p u t v o l t a g e ( v ) v in =4.3v v out =3.3v i o =150ma c (sr) =0.22 m f c o =10 m f t j =25 o c time (10m s/div) 5 0 3 2 1 0 3.18 3.20 3.22 3.24 3.26 3.28 -40 -20 25 55 85 125 temperature ( o c) v o u t ( v ) v in =4.3v i out =1ma i out =150ma v out vs temperature e n a b l e v o l t a g e ( v ) o u t p u t v o l t a g e ( v ) c (sr) =0.01 m f c (sr) =0.1 m f v in =4.3v v out =3.3v i o =150ma c o =10 m f t j =25 o c time (10m s/div) 5 0 3 2 1 0 output voltage, enable voltage vs time (start-up) 0.1 1 10 100 0 60 90 120 150 i load (ma) e s r ( w ) stable region unstable region untested region v in =4.3v v out =3.3v c l =1 m f stability vs esr vs i load
ame 11 ame8831 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application rev.h.05 stability vs esr vs i load 0.1 1 10 100 0 60 90 120 150 i load (ma) e s r ( w ) stable region unstable region untested region v in =4.3v v out =3.3v c l =10 m f
ame 12 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application ame8831 rev.h.05 year a a a w w xxx0 a a a w w xxx1 a a a w w xxx2 a a a w w xxx3 a a a w w xxx4 a a a w w xxx5 a a a w w xxx6 a a a w w xxx7 a a a w w xxx8 a a a w w xxx9 marking date code n date code rule n tape and reel dimension package carrier width (w) pitch (p) part per full reel reel size sot-25 8.00.1 mm 4.00.1 mm 3000pcs 1801 mm carrier tape, number of components per reel and reel size sot-25 w p ame ame pin 1
ame 13 ame8831 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application rev.h.05 n tape and reel dimension carrier tape, number of components per reel and reel size w p ame ame pin 1 package carrier width (w) pitch (p) part per full reel reel size tsot-25 8.00.1 mm 4.00.1 mm 3000pcs 1801 mm tsot-25
ame 14 150ma hi-psrr, low-quiescent ldo with in-rush current control for usb application ame8831 rev.h.05 n package dimension sot-25 tsot-25 min max min max a a 1 0.00 0.15 0.0000 0.0059 b 0.30 0.55 0.0118 0.0217 d 2.70 3.10 0.1063 0.1220 e 1.40 1.80 0.0551 0.0709 e h 2.60 3.00 0.10236 0.11811 l q 1 0 o 10 o 0 o 10 o s 1 0.37bsc 0.0146bsc 0.95bsc 0.0374bsc 1.90 bsc 0.07480 bsc symbols millimeters inches 1.20ref 0.0472ref l top view side view front view c1 d s1 e e h a 1 b a l top view side view front view c1 d s1 e e h a 1 b a min max min max a+a 1 0.90 1.25 0.0354 0.0492 b 0.30 0.50 0.0118 0.0197 c 0.09 0.25 0.0035 0.0098 d 2.70 3.10 0.1063 0.1220 e 1.40 1.80 0.0551 0.0709 e h 2.40 3.00 0.09449 0.11811 l q 1 0 o 10 o 0 o 10 o s 1 1.90 bsc 0.07480 bsc symbols millimeters inches 0.35bsc 0.0138bsc 0.95bsc 0.0374bsc
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 2008 document: 1009-ds8831-h.05 corporate headquarter ame, inc. 2f, 302 rui-guang road, nei-hu district taipei 114, taiwan. tel: 886 2 2627-8687 fax: 886 2 2659-2989 www.ame.com.tw e-mail: sales@ame.com.tw

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