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| ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ?d n b y 9 : 1 3 b 0 n b y 9 : 1 3 c? #v?1 ? i 6 1 1 n b|r?
? 2 1 1 l i {r qr ?? 2 7 w s n t zk?1 ?? j q|r? *???? |r?1 x ? w? ?? 2 1 1 n w|r??r1? ? ? zk m e p ???o?? 9 1 b|???? ?? [1?? ?1 <?? 5t j - ??? 52 a 5? (6 [z -? ?? 5 ?t j' r? [?? ?r ) n b y 9 : 1 3 c * n b y 9 : 1 3 b -0 - t f m b [ t f m cr? sr?1??? 2 / 6 w 2 / 9 w 3 / 1 w 3 / 6 w 4 / 1 w 4 / 2 w 4 / 4 w 5 / 7 w t 5 / 8 w n b y 9 : 1 3 c|r?1 -20 -j]|? j1 ??? 1 / 7 w? 6 / 4 w *? ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` b t? n q 4 [#q+? ?c 9 ?# ? h q t#q+t k?? ?? ? ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` v ? 2 / 8 wu 6 / 6 wr??1 *? ? 1 / 7 wu 6 / 4 wr?1 *? ? 2 1 i {u 2 1 1 l i {?rr ? 2 7 w s n t ? 9 1 b ?+? ? 6 l i { ?? : 3 e c ! q t s s ? i? 6 1 1 n br? ? s ?r??? ?+t *?? 2 / 6 &| r?1 t ? 6 1 1 n b ?? 1? ?? 2 1 1 n w ! )"m? * ? ? y+??? = ! 2 b ? 8 1 1 n ba 5? ? ? z -? ? ? r?r? (6? ? ? ? 3 n n ! y ! 3 n n ! y ! 1 / 9 n n ! u e g o v? n b y 9 : 1 3 b 0 n b y 9 : 1 3 c ? 6 1 1 n b ! m e p?1 3 n n ! y ! 3 n n u e g o v? ________________________________________________________________ maxim integrated products 1 19-0990; rev 3; 5/08 ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ? g? ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ?o ?+? 5 , -,?@ o ] s p i t*e| v? ?? hgr a fd| 9[ m 3 n n ! y ! 3 n n ! u e g o v? ?+? . 5 1 du , 2 3 6 d? t *? [ m|??k ?t ?|" ? ta5 n b y j nu+^at ?|ia n b y j ny !i|@?|?j t?%? |g ? ??@ia| -@?a ? t !ig??i?? \$?|eiv?l n b y j n |^at ? ?s ? e- ["d|k ?t ?? 7 n b y j n|? x x x / n b y j n . j d / d p n / d o - ? e? in en out byp on off output 4.6v selb sela outs gnd ep 10 f input 4.7v to 5.5v 0.01 f 10 f maX8902A in en out byp on off output adjustable 0.6v to 5.3v gs pok fb gnd ep 10 f input 1.7v to 5.5v 0.01 f 10 f max8902b r1 r2 logic supply r3 100k to c part features top mark maX8902A ata+ pin-selectable output voltage abg max8902b ata+ adjustable output voltage abh n b y 9 : 1 3 b 0 n b y 9 : 1 3 c ? 6 1 1 n b ! m e p?1 3 n n ! y ! 3 n n u e g o v? 2 _______________________________________________________________________________________ absolute maximum ratings stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. byp, en, in, out, sela, selb, pok to gnd, gs to gnd, fb, outs to gnd .....................................................-0.3v to +6.0v output short-circuit duration.....................................continuous continuous power dissipation (t a = +70c) 8-pin, 2mm x 2mm tdfn (derate 11.9mw/c above +70c) .............................953.5mw operating temperature range .........................-40c to +125c junction temperature range ............................-40c to +150c storage temperature range .............................-65c to +150c lead temperature (soldering, 10s) .................................+300c electrical characteristics (v in = v en = 5v, outs = out, circuit of figure 2 (maX8902A) and figure 3 (max8902b), t a = -40c to +125c, unless otherwise noted.) (note 1) parameter conditions min typ max units in input voltage range 1.7 5.5 v input undervoltage lockout v in rising, 100mv typical hysteresis 1.5 1.6 1.7 v out output voltage range v in v out + 0.1v 0.6 5.3 v output voltage accuracy v in = 1.7v to 5.5v for v out 1.4v, v in = (v out + 0.3v) to 5.5v for v out > 1.4v, i out = 0.1ma to 500ma -1.5 +1.5 % load regulation i out = 0.1ma to 500ma 0.02 % line regulation v in = 1.7v to 5.5v for v out 1.4v, v in = (v out + 0.3v) to 5.5v for v out > 1.4v, i out = 200ma 0.04 % v in 3.6v, t a +85c 50 100 v in 3.6v, t a +125c 120 dropout voltage (note 2) i out = 500ma v in = 1.7v 150 mv current limit v out = 95% of regulation, v in = v out + 0.5v 600 700 800 ma output noise i out = 100ma, f = 10hz to 100khz, c byp = 0.01f 16 v rms f = 5khz 92 f = 10khz 85 power-supply rejection ratio i out = 10ma f = 100khz 62 db outs ( maX8902A only) outs input bias current in regulation 0.5 7.0 a fb ( max8902b only) fb threshold accuracy v in = 1.7v to 5.5v, i out = 0.1ma to 500ma 0.591 0.600 0.609 v t a = +25c -0.1 0.02 +0.1 fb input bias current v fb = 0.6v t a = -40c 0.03 a byp byp capacitor range regulator remains stable 1 100 nf byp startup current from byp to gnd during startup 50 a n b y 9 : 1 3 b 0 n b y 9 : 1 3 c ? 6 1 1 n b ! m e p?1 3 n n ! y ! 3 n n u e g o v? _______________________________________________________________________________________ 3 electrical characteristics (continued) (v in = v en = 5v, outs = out, circuit of figure 2 (maX8902A) and figure 3 (max8902b), t a = -40c to +125c, unless otherwise noted.) (note 1) parameter conditions min typ max units gnd t a < +85c 80 120 gnd supply current i out = 0ma t a < +125c 160 a t a = +25c 0.001 +1 gnd shutdown current v in = 5.5v, en = 0v t a = +85c 0.01 a sela/selb ( maX8902A only) when shorted to gnd or v in 500 select input resistance when open 1 m select input capacitance when open 10 pf en en rising 0.8 1.2 en falling, t a < +85c 0.4 0.7 enable input threshold v in = 1.7v to 5.5v en falling, t a < +125c 0.38 0.7 v t a = +25c -1 0.001 +1 enable input bias current v en = 0v to 5.5v t a = +85c 0.01 a pok (max8902b only) out rising 88 91 94 % pok threshold out voltage when pok switches out falling 88 % pok voltage, low i pok = 1ma 10 100 mv t a = +25c -1 0.001 +1 pok leakage current pok = 5.5v, v en = 0v t a = +85c 0.01 a thermal shutdown t j rising 165 thermal shutdown threshold t j falling 150 c output transient load transient i out = 50ma to 500ma to 50ma, t rise = t fall = 1s 25 mv/ p-p line transient v in = 4v to 5v to 4v, t rise = t fall = 5s, i out = 500ma 3 mv/ p-p in-to-out reverse voltage turnoff threshold in falling below out 10 mv note 1: all devices are production tested at t a = +25c. specifications over the operating temperature range are guaranteed by design and characterization. note 2: the dropout voltage is defined v in - v out , when v out is 5% lower than the value of v out when v in = v out + 0.5v. n b y 9 : 1 3 b 0 n b y 9 : 1 3 c ? 6 1 1 n b ! m e p?1 3 n n ! y ! 3 n n u e g o v? 4 _______________________________________________________________________________________ ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ?o ?+v (maX8902A, v in = 3.6v, v out = 2.5v, t a = +25c, unless otherwise noted.) 0 40 20 80 60 120 100 140 023 145 quiescent current en = high, no load maX8902A/02b toc01 input voltage (v) input current ( a) 2.500 2.502 2.501 2.504 2.503 2.505 2.506 0 200 100 300 400 500 load regulation maX8902A/02b toc02 load current (ma) output voltage (v) 3.6v input 2.490 2.496 2.494 2.492 2.498 2.500 2.502 2.504 2.506 2.508 2.510 1.5 2.5 3.5 4.5 5.5 line regulation maX8902A/02b toc03 input voltage (v) output voltage (v) 200ma load 40ms/div load transient response 50ma to 500ma to 50ma v out 100mv/div 200ma/div maX8902A/02b toc04 i out t rise = t fall = 1 s 10 s/div line transient response v in 2v/div 2mv/div maX8902A/02b toc05 v out 2.5v output 5 load 5v 4v 5v 100 s/div startup waveform v en 500mv/div 2v/div 200ma/div maX8902A/02b toc06 i in v out 5 load c byp = 0.01 f 0 10 20 30 40 50 60 70 80 0 100 200 300 400 500 dropout voltage vs. load current maX8902A/02b toc07 load current (ma) dropout voltage (mv) 3.6v input, 4.6v output preset the slope of the line indicates a 129m on-resistance in dropout psrr vs. frequency maX8902A/02b toc08 10k 1k 100 10 100k frequency (hz) 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 psrr (db) maX8902A ldo output-noise spectral density vs. frequency maX8902A/02b toc09 frequency (hz) 100k 10k 1k 100 100e+0 1e+3 10e+3 10e+0 10 1m noise density (nv hz) ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` .? n b y 9 : 1 3 b 0 n b y 9 : 1 3 c? ?1?#v?1 ? i 6 1 1 n b|r? ? 2 1 1 l i {r qr ?? 2 7 w s n t zk?1 ?? j q|r? *??? 1r x ? ?? 2 1 1 n w|r??r1?? ? n b y 9 : 1 3 ???o?? 9 1 b|??? ?? [ 1?? ?1| <?? 5t j - ??? 52 a 5 (6? [z -? ? ?t j?' r? [?? ?r ) pok * ! ) n b y 9 : 1 3 c * < ? ? vd ?d 2?, n b y 9 : 1 3 b -0 - t f m b [ t f m cr? sr?1??? 2 / 6 w 2 / 9 w 3 / 1 w 3 / 6 w 4 / 1 w 4 / 2 w 4 / 4 w 5 / 7 w t 5 / 8 w n b y 9 : 1 3 c|r?1 -20 -j]|? j1 ??? 1 / 7 w? 6 / 4 w *? ' ) f o * n b y 9 : 1 3 b 0 n b y 9 : 1 3 ct : 'r? f o s f o o? ??3 -2 ?r s f oq?? ?3 -2'r ? +y? ? s f o {? j o n b y 9 : 1 3 b 0 n b y 9 : 1 3 c ? 6 1 1 n b ! m e p?1 3 n n ! y ! 3 n n u e g o v? _______________________________________________________________________________________ 5 ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` [ m? maX8902A max8902b 1in in 2 gnd gnd 3en en sela 4 gs selb 5 pok outs 6 fb 7 byp byp 8 out out ep ep [ m a ? ?1??r? s j o {u 2 / 8 w? 6 / 6 w *?|??0 - 2 1 g?#?? s j ol 5? h o e ? 'r? ] ??3 sr0 - 4 l ? o???3??? ]? 2 b2q?? ] ?3 t { j o u? ?+ r?1? r? t f m b -2 {u h o e j o t? 9?1 g t f m b [ t f m c| ??m- 3??r?1 ]' s h t {u h o e r?1? r? t f m c -2 {u h o e j o t? 9?1 g t f m b [ t f m c| ??m- 3??r?1 ?? ?ririu*a?1?| : 2 &2? ' ? 5r$?i? 5 ? t r???1? pok ? ? r 6?r?? i ?r?1 s p v u t {u ? e ? { s p v u t {? p v u ( cr? s g c {u p v u [ h o e? .|? j1|f?? v??r?1 w g c ?? 1 / 7 w l 5r?? c z q [ p v u? . { 1 / 1 2 g?#??2iu 2 7 w s n t |r ?* ???? -2 <?? -|r? h ? h > ! ) 6 w ! 0 ! n t * ! y ! ) 1 / 1 2 g ! 0 ! d c z q * ?1r??z?1r| -2 6 1 1 n b? 0 - 2 1 g?? ) f t sc? 1 / 1 4 * l 5u h o e a fd {???2 2z n b y 9 : 1 3 b 0 n b y 9 : 1 3 c l 5 ) c z q * {? c z q [ p v u? .|?? ? i ?e ( c? [ ?1r?| ( c0 5 -?i ~?0b 1 / 1 2 g|?? ?? 4 3 i { ? *q ?r? ? 5?e .r?1? h? c z q??i?? 1 / 1 2 g |?? ? s? h??? 6 w 0 n tz?? h ?? -|2 6 1 n b|s h-r?ac? @6 2 1 gr ??? ? 6 1 1 n b ! m e p?1 3 n n ! y ! 3 n n u e g o v? 6 _______________________________________________________________________________________ d 2 / ! < ? ? vd voltage select sela selb 990k outs ea byp out gnd ref 0.6v byp maX8902A only fb control en thermal protection pok in current limit reverse current protection max8902b only 0.54v maX8902A max8902b -2? 1 / 1 1 2 g? 1 / 2 g *?? c z q?? ? ?+ ? $? -|? h? ?? h > ! ) 6 w ! 0 ! n t * ! y ! ) 1 / 1 2 g ! 0 ! d c z q * ??@|5z ? h?+?? ?? 5-a 5 ? a ? ? hm?? 6 1 1? ??@|5+? ?? if ?? c z q '? w e c z q '? ? 2 1 o b s?r? y - ? r|?bi ? ? ? ? n b y 9 : 1 3 b 0 n b y 9 : 1 3 c0 -" [z -? 5?ra 5 r?|? ?e? +ra 5u h o er ? s"?? 8 1 1 n b )?o? *z?= z ht ?? i ?iu , 2 7 6 d z"?? 5 s ? hri ? ]?u , 2 6 1 d ?d r?b p a??|r?1? g?? .r? s? ??0? ?? , 2 6 1 d [ , 2 7 6 d? .?? ir?1 ?r??1 n b y 9 : 1 3 b 0 n b y 9 : 1 3 c ? (6? ? +r' ? j|?? ;|?1?r???~ .0? ? wm| (6? n b y 9 : 1 3 b 0 n b y 9 : 1 3 ct : (6?1 6?i j o? 1?? p v u?1 2 1 n w s? ? 6?? 5- ?? q n p t ? | { 4?? q 2z e n b y 9 : 1 3 b 0 n b y 9 : 1 3 c 9[ m 3 n n y 3 n n u e g o v? r? a fd a fd5 j d2z|f ?? s {ur?2z - ;|??2 h|z ? j d v?| zv?*?- 2?, ? r?1 ) n b y 9 : 1 3 b * n b y 9 : 1 3 b -20 -a 5 t 5 t f m b [ t f m cr? sr ??? :??1??- 3?, t f m b [ t f m cb {u h o e j o t? 9 -20 -j] ] q?? ? 3??3 t 5c t f m b [ t f m c|? ???? g -20 - s f o t j o~ . { h o e ? ??1|? 1?? ??r?1 ) n b y 9 : 1 3 c * n b y 9 : 1 3 c 0 -j] ( c? ???1r?1?d 4 ?,r -2??? 1 / 7 w? 6 / 4 w? . s?| ( c ? ) s 3 *??? 2 3 1 l t ?c?' g cr???? ? "cm ??+ | ( c? ) s 2 *? | w g c 5 1 / 7 w ( c ??1 ?? ? ) n b y 9 : 1 3 c * n b y 9 : 1 3 ct : j| 'r pok o???3 -,r?1/ 3iu?1 *? -| pok ? @??ur?1 ??1?| : 2 &? +r - tr ? pok ? ? rr v v out fb 12 1 = ? ? ? ? ? ? ? n b y 9 : 1 3 b 0 n b y 9 : 1 3 c ? 6 1 1 n b ! m e p?1 3 n n ! y ! 3 n n u e g o v? _______________________________________________________________________________________ 7 continuous power dissipation 953.5mw derate 11.9mw/c above +70c ja * 83.9c/w jc 36.6c/w - 2 / ! 3 n n ! y ! 3 n n ! u e g o v?zv?* * k b ?*5?m k f t e 6 2*e?c| h????? q d c output voltage (v) sela state selb state 1.5 in unconnected 1.8 unconnected gnd 2.0 unconnected in 2.5 unconnected unconnected 3.0 gnd gnd 3.1 gnd in 3.3 gnd unconnected 4.6 in gnd 4.7 in in - 3 / ! n b y 9 : 1 3 br?1 n b y 9 : 1 3 b 0 n b y 9 : 1 3 c r??? n @?r?' 2 1 g?#??? ??s ?+ t [? ?? *?????|?? ?? y 6 s t y 8 stv|??0? ??z q| ?+ r?? p v u? "c 2 1 g|??2i???v? ??s ?+t [? ?? *?????|?# ?? ?? y 6 s t y 8 stv|??0? ??z q | ?+ ? 6 1 1 n b ! m e p?1 3 n n ! y ! 3 n n u e g o v? 8 _______________________________________________________________________________________ in en out byp on off output 4.6v selb sela outs gnd ep 10 f input 4.7v to 5.5v 0.01 f 10 f maX8902A d 3 / ! n b y 9 : 1 3 b ?rb? 5 in en out byp on off output adjustable 0.6v to 5.3v gs pok fb gnd ep 10 f input 1.7v to 5.5v 0.01 f 10 f max8902b r1 r2 logic supply r3 100k to c d 4 / ! n b y 9 : 1 3 c - ?rb? 5 ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` `g? process: bicmos tdfn-ep 2mm x 2mm top view 1 2 8 7 3 4 6 5 outs selb sela out byp gnd en in maX8902A tdfn-ep 2mm x 2mm 1 2 8 7 3 4 6 5 fb pok gs out byp gnd en in max8902b ep + ep + ep = exposed paddle. ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` [ m|? ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` v?g? ??" | v?jpg? [ fdz ?? www.maxim-ic.com.cn/packages v? o v? i am s 8 tdfn t822-1 21-0168 n b y 9 : 1 3 b 0 n b y 9 : 1 3 c ? 6 1 1 n b ! m e p?1 3 n n ! y ! 3 n n u e g o v? n b y j n ? ?0 ? 9 4 3 9g( ?v i 2 1 1 1 9 4 ? e? ?? 9 1 1 ! 9 2 1 ! 1 4 2 1 ? ?? 1 2 1 . 7 3 2 2 6 2 : : ^? 1 2 1 . 7 3 2 2 6 3 : : n b y j ny n b y j n?-2j|? \? 5' ? y ?? - n b y j n? ?? \ . ??? \0| ? ??- t ? [ ?|z ? maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 _______________________ 9 ? 2008 maxim integrated products 5 n b y j n ! j o u f h s b u f e ! q s p e v d u t - ! j o d / |?* ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ?? ?% 0 9/07 1 1/08 1, 5, 8 2 2/08 2, 4C8 3 5/08 4 ??(k ???e ? ? ? "?t sr????? 5 / 8 g ?? 2 1 g s c q ?? c z q ?d ? ?o ?+v |d 6|* |
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