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| !" atc # ! ? ? ? ? !"#! $$!# ? % ? & ? '()*"#"!*"+$!*"", ! ! ', #, - * - - ./ $$ - ', & ', ( "# $$ 0 0 - ! ? ? !" atc ! 3 thermal shutdown 1 2 vout adj 1.25v + + current limit vin + + ! to263 3 2 1 vin vout adj tab is vout front view to252 3 2 1 vin vout adj tab is vout front view to220 tab is vout 3 vin 2 1 vout adj front view ! $ % % & ' % # (% % !" atc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atc ! 0 ;($ 1 ) ,1)&- < 3 3% 0 ;( & % % # < ' < # %= 4!/ % 3 0 ;( # &' ( ( 0 ;( 3% 3% < > vout = vref (1+ r2/r1) +iadj *r2 , where vref = 1.25 typically, iadj = 55ua typically r1&r2 as shown at below ap1084 vin vout vref adj r1 r2 iadj=55ua 0 ;(? 3% $ @ ) a 3% b a + a 0 ;( ? a #$ 33 a ' < % 7 ? 7 ? ) 9 * + (' + 0 ;( / % # / ? b ,' 0 ;( a a ? ' ' "- ' . ( 0 ;( $ < < $ $ 150 o c ? < $ ? * % # 0* % a < 3!" atc ! # temperature ( o c) percent change in output voltage vs temperature output voltage change (%) -50 -25 0 25 50 75 100 125 150 - 2 -1.5 - 1 -0.5 0 0. 5 1 1.5 2 input voltage (v) line regulation output voltage deviation (%) 0 0.2 0.4 0.6 0.8 1 24 6 8 10 12 time (us) line transient response output voltage deviation (mv) input voltage (v) -40 -20 0 20 40 5.5 6.5 7.5 cin=1uf cout=10uf tantalum 0 20 40 60 80 100 120 140 160 180 200 time (us) load transient response load current (a) output voltage deviation (mv) 010 20 30 40 50 60 70 80 90 100 0 2 4 6 -40 -20 0 20 40 60 cin=1uf cout=10uf tantalum preload=100ma output current (a) dropout voltage vs output current dropout voltage (v) 0 0. 2 0. 4 0. 6 0. 8 1. 0 1. 2 1. 4 1. 6 1. 8 2. 0 0 1234 tj = 125 o c tj = 25 o c 5 temperature ( o c) load regulation vs temperature output voltage deviation (%) -25 0 25 50 75 100 125 - 1 -0.80 -0.40 -0.20 0 0.20 i load=1.5a 2!" atc ! 6 > c% ,) + - 12*"+$$3 e e a l2 c2 c l b b2 d l3 l /!0* ! ! 2 d @ d @ (3 33 * 3e0 * (3 33 ) ( ; = ; ( 3 @+* 1 3"3 2 3 1 d 1 3 1 3 " 1"2*"#"$3 b2 e e b l2 e1 d l1 a c1 c a1 h seating plane see note2 /!0* ! ! ;2 d( ( 3 (e0 3 3 * ; * ; ) = 3 23 d @+* ; @+* f " ( 1 g 1 3 ( 1 2 ; &=+> 5=)=*&61#=>&/ 3 @ :#1++6hh=+=)'&0&+##%=*&*:&6#h "!" atc 1$2*"",$3 /!0* ! ! ( d (3 " (3 * (3 ) 32 23 = ; ( d d ' 33 f " 5 ; 3 1 3 3; i0 d 2 j 3 d q e l1 l b e e1 b1 a j1 f c p seating plane |
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