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step-down dc/dc converter controller with voltage detector 1 no. ea-066-0204 outline ! "#$# % & '( " #" ( ! #" ( " ( #" #" )* #" #" ( !%+ "!(($ ( '$(# , " " # " % ## !( # $# ! % )* #" # " # )* ( # $" ( (($ # % +)* # " ( " ##% '( ( , # #$$- " # -% $( (#% $ #" - , *& -! % ( " ( ' #" ! " ' % $ #" - ( # , # #$$ %& ( # ! $# . /#% features ? !('#) !%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %0)0%) ? 1# ( *# ( *#23 $ $4 ? ( * /#$%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 055-67"855-67 ? 6!&(($ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% $%95: ? $# %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% $%5 + ? !##) ! %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% ! (5%) ! (%8) 8%5) ? 6!+# $##) !%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %5: ? ! ) !%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% ! (5%) !(%) ;%8) ? 6!+# $ ) ! %%%%%%%%%%%%%%%%%%%% %5: ? 3 # ((((##) !%%%% $%<55 = applications ? # ( # /# " " # # )" % ? # ( $ /# % ? # ( # % r1221n 2 block diagram pwm/vfm control soft start chip enable osc vref vref protection v in v out ce gnd ext vd out selection guide ' "## !" " ( /#$" (#" !$( ' # . /#% $! ! # > ,,,, code contents !##) !2) 4? ! (5%) !(%8)8%5)% ! 2) 4 ! (5%) !(%);%8)% +?0%5) ! ( * /#$ *# +?055-67" )* #"3 $ 1?855-67" )* #"3 $ ?055-67"# )* #"3 $ ?855-67"# )* #"3 $ &?055-67" )* #"$ *?855-67" )* #"$ @?055-67"# )* #"$ 6?855-67"# )* #"$ r1221n 3 pin configuration sot-23-6w 5 64 v out gnd ce (mark side) 123 ext vd out v in pin description pin no. symbol description &a &, 2##$> 4 ) ) ! ##2##$> 4 0) #$ ; & & 8 @ @ # b) ( !##) ! absolute maximum rating symbol item rating unit ) ) #$) ! 8 ) ) &a##) ! 5%0 ) c5%0 ) ) &'#) ! 5%0 ) c5%0 ) ) ) ##) ! 5%0 8 ) ) ) '#) ! 5%0 ) c5%0 ) ' &a'# ### <8 + 85 ! # ! ;5 cd8 = ! ! # ! 8 8 c8 = r1221n 4 electrical characteristics ? r1221nxxxa (c,e,g) output voltage : vo, detector threshold : v d 2e8=4 symbol item conditions min. typ. max. note* unit ) !'#) ! %0 0% ) ) ##) ! ) e) e)c%)"' e5 + ) 5%9d ) ) %5 +) ? ) ? ##) ! # (( ;5= d8= <55 = ( * /#$ ) e) e)c%)"' e55 + ;5 055 0b5 + -67 ? ( ? * /#$ # (( ;5= d8= <5%0 := ' #$# ) e0%)") e0%)") e0%) 55 b5 1 f+ ' $# ) e0%)") e5)") e5) 5%5 5%8 f+ ' &ag6h### ) ed)") ei%9)") ed)") ed) 5 b + ' &ag3h### ) ed)") e5%)") e5)") e5) 5 5 + ' &g6h'## ) e0%)") e0%)") e0%) 5%5 5%8 & f+ ' &g3h'## ) e0%)") e5)") e0%) 5%8 5%5 & f+ ) &g6h'#) ! ) ed)") e5) %8) 5%d % * ) ) &g3h'#) ! ) ed)") e%8) 5) 5%0 5%d * ) ,$ , # #$ $ 55 : )*$ )*#$$ +1 * $ 8 : $ $ ( (# ) e)c%)") e5) ) c % ) ( d5:( !! 85b* $ ( # ) e)c%)") e)c%) 5) 08@ ' ) ##3 - ! # ) e) e) e) ed) 5%5 5%8 ' f+ ' ) g3h### ) e) e%0)") e5)") e5%) 5%8 %5 ' + ) ) eb)") eb)") e) %) 5) ) 5%9d ) ) %5 j) ) ## $ ( ) ! ) eb)") eb)") e5) ) %) ( d5:( !! 85j ) 6$ ) eb)") eb)") e5) ) %) ) 5%5 ) 5%50 ) 5%58 j ) ? ) ? # (( ;5= d8= <55 = ?( # r1221n 5 ? r1221nxxxb (d,f,h) output voltage : vo, detector threshold : v d 2e8=4 symbol item conditions min. typ. max. note* unit ) !'#) ! %0 0% ) ) ##) ! ) e) e)c%)"' e5 + ) 5%9d ) ) %5 +) ? ) ? ##) ! # (( ;5= d8= <55 = ( * /#$ ) e) e)c%)"' e55 + ;55 855 b55 + -67 ? ( ? * /#$ # (( ;5= d8= <5%0 := ' #$# ) e0%)") e0%)" ) e0%) ;5 55 1 f+ ' $# ) e0%)") e5)") e5) 5%5 5%8 f+ ' &ag6h### ) ed)") ei%9)") ed)" ) ed) 5 b + ' &ag3h### ) ed)") e5%)") e5)" ) e5) 5 5 + ' &g6h'## ) e0%)") e0%)" ) e0%) 5%5 5%8 & f+ ' &g3h'## ) e0%)") e5)") e0%) 5%8 5%5 & f+ ) &g6h'#) ! ) ed)") e5) %8) 5%d % * ) ) &g3h'#) ! ) ed)") e%8) 5) 5%0 5%d * ) ,$ , # #$ $ 55 : )*$ )*#$$ +1 * $ 8 : $ $ ( (# ) e)c%)") e5) ) c % ) ( d5:( !! 0b5* $ ( # ) e)c%)") e)c%) 5);@ ' ) ##3 - ! # ) e) e) e) ed) 5%5 5%8 ' f+ ' ) g3h### ) e) e%0)") e5)" ) e5%) 5%8 %5 ' + ) ) eb)") eb)" ) e) %) 5) ) 5%9d ) ) %5 j) ) ## $ ( ) ! ) eb)") eb)" ) e5) ) %) ( d5:( !! %8 0%8 b%5 j ) 6$ ) eb)") eb)" ) e5) ) %) ) 5%5 ) 5%50 ) 5%58 j ) ? ) ? # (( ;5= d8= <55 = ?( # r1221n 6 test circuits a) sd c l pmos v in c in 3 l oscilloscope 42 6 1 5 v d) v in v out v ext 425 316 a b) c in v in 3 4 6 1 5 2 a e) v in 316 425 a c) v in 36 1 45 2 a f) sd c l pmos v in c in 316 425 l oscilloscope v g) v in v out 316 425 oscilloscope i) a vd out v in 316 425 h) v in 36 1 45 2 a v out j) v out v in 316 425 oscilloscope r '# 3?if62 # & "5;4 ?1;92 " -$$4 ?;if*2 # $4 ?f*2 # $4 ?6+5526 4 ?55- ? r1221n 7 typical applications and application hints r1 sd1 c out pmos cpu ce control c in v in l ce v out vd out ext gnd v cc reset/ ?6+5526 4" 0;;0)2 ,4 3 ?582 # "if64 ?1;92 4 ?;if*2 # $4 ?5f*2 # $4 ?55- ? r1221n 8 $##'" (!#> ? +- ! " ( " (( ( # " ( ## $%$# &$ #$" -g6h !() % ? $ 0 ( !%2% " ,%8 4 ? ! ! !## !( % ) !( # ## !( % 2 ) ! %5ik##) !( 5%9d ? ,,,, $ "## !() @" ( (## ( ) ## #$" #(# ! #! % ? ( $ # (> , # #$$#! $ ( #"2( & 4 # -#, ! % ( ### !(( " # $ - # % " ( ' #" ! " ' %6 " ( !' " ( #$# (("( #( ! " !( ) ( "' ! ( % '( ! (#$ !" /# ( ) ! # # !( ! ( ! # $ ( #" # -( ) ! ##) !( % " -' 2&eg3h4( "( ) !" ( ) ! /# ) " -' 2&eg6h4% ? , ' 7 '%' # " #) # %+ -#(( ! #! ( #$!%+ !!# ( #!( #$" # () %'( ( #$!" !( #$( '(## !# % $ ## ('% ? l $(f* ( ) " !!( /#$ # # % $## ! # !## !% # $ - ! !! $ # , ((% ? # #(($ ! # ! # %+( #(# ( # , $ "' $, # , # ! , # !% l # # % ? l ( -$$!!" $ # $% ? #'# ) ! # ! !% r1221n 9 ? ( ( # # #! ' , $ # #% $ ( #%' # "! # $ ## !"# " ( "1 ', #% operation of step-down dc/dc converter and output current ! !$# 3, " ! !$( # 3, ** !$" ## ! # ! % , ( (! ! ? sd v in lxtr c l v out i out l # # '32e4(" !$ !3%+ "'3 ( '3 2e54 '3 , 24(3a % ?3, # ((" -$2 4# 3 '3 '3 ," # '32e4 (% 0?'3 ! # $ '3 ( (" # ((" ## " , $ ( '3 5 # (( #!% ' " '3 # ( '3 2m54% ' ( $ "## ! $ ! 24" ( /#$2(4! % ? discontinuous conduction mode and continuous conduction mode , # #2'3 ,4 # #2'3 4(# ( #!# 3, **% (( '3 , '3 " $ ? '> ? 'e'3 ,'3 e) 3e2) ) 4 3%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% &/# r1221n 10 e(ec(( #$2:4e 55e ( 55 (( '&/# ") 3 2) ) 4 3 $ ! ( # " !(# **% ### 2' 4 $ "k(( # ! %' " !$ !# # ! ( ! $# ! (((" ( '3 7 2'3 e54%' ! # $ "# $" ((2e((4" ' (# "'3 ! 7 2'3 m54%( ( ## ( ## % '## "&/# ( # #" e ) ) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%% &/# k" ## " e" ## % output current and selection of external components 3, ? 2 "# # ' " (3a # (# %4 ) e) c2 c 4 ' c3 ' %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% &/# 0 3, **? 3 ' ((e) c) c ' %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% &/# ; #&/# ;&/# 0 ( #$"2((c4e " e2) c) c ' 42) c) ' 4 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% &/# 8 # (> ' e2) ) ' ' 4 (3%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% &/# b " -# ( #!3"3, " (> '3 ,e' c' %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%% &/# i r1221n 11 '3 ,"(# ## , % , # ## % external components 1. inductor # -# ,'3 ,%'( ! # # (" ! # # - ( (($ % # " #(3#" ! # % # ! # " ( "( !### " (($ #! # ! #(3 " 2diode l ) 2 -$$ %4 !!% ! !# ) # !#/# '3 ,% 0% t +( "# & 2&/# 4 $( 5f*( % # (##) !" ( ;i55f* # $ % 4. lx transistor *& /# ( '% ' - !! # # (! # !% ' (# !"# *& $" *& !% '( ! # $( $# " *& ( !(($% '( # $ $( $# " *&! $( ! (($% , # ## # ( *&# ! -# "'3 ,% r1221n 12 typical characteristcs 1) output voltage vs. output current l=27 m h 3.200 3.220 3.240 3.260 3.280 3.300 3.320 3.340 3.360 3.380 3.400 output current i out (a) 12v 8v 4.5v 1e-05 0.0001 0.001 0.01 0.1 1 output voltage v out (v) r1221n33ah l=27 h 1.480 1.520 1.515 1.510 1.505 1.500 1.495 1.490 1.485 output current i out (a) 13.2v 8v 5v 2.3v 1e-05 0.0001 0.001 0.01 0.1 1 output voltage v out (v) r1221n15xh 2) efficiency vs. output current cd104-27 h si3443dv 0 10 20 30 40 50 60 70 80 90 100 output current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n33aa(v in =4.5v) cd104-27 h si3443dv 0 10 20 30 40 50 60 70 80 90 100 output current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n33aa(v in =12v) cd104-27 h si3443dv 0 20 40 60 80 100 output current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n33ac(v in =4.5v) cd104-27 h si3443dv 0 20 40 60 80 100 output current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n33ab(v in =12v) r1221n 13 cd104-27 h si3443dv 0 10 20 30 40 50 60 70 80 90 100 output current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n33ac(v in =4.5v) cd104-27 h si3443dv 0 10 20 30 40 50 60 70 80 90 100 output current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n33ac(v in =12v) cd104-27 h si3443dv 0 20 40 60 80 100 output current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n50xa(v in =6.0v) cd104-27 h si3443dv 0 20 40 60 80 100 output current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n50xa(v in =12v) cd104-27 h si3443dv 0 20 40 60 80 100 output current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n50xb(v in =6.0v) cd104-27 h si3443dv 0 20 40 60 80 100 output current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n50xb(v in =12v) r1221n 14 cd104-27 h si3443dv 0 20 40 60 80 100 outpur current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n50xc(v in =6.0v) cd104-27 h si3443dv 0 20 40 60 80 100 outpur current i out (ma) 0.1 1 10 100 1000 efficiency (%) r1221n50xc(v in =12v) 3) ripple voltage vs. output current l=27 h c=47 f(ta) 0 20 40 60 80 100 120 140 160 180 200 output current i out (ma) v in =4.5v v in =8v v in =12v 1 10 100 1000 ripple voltage v rpp (mv) r1221n33aa l=27 h c=47 f(ta) 0 20 40 60 80 100 120 140 160 180 200 output current i out (ma) v in =6v v in =8v v in =12v 1 10 100 1000 ripple voltage v rpp (mv) r1221n33aa l=27 h c=47 f(ta) 0 20 40 60 80 100 120 140 160 180 200 output current i out (ma) v in =4.5v v in =8v v in =12v 1 10 100 1000 ripple voltage v rpp (mv) r1221n33ab l=27 h c=47 f(ta) 0 20 40 60 80 100 120 140 160 180 200 output current i out (ma) v in =6v v in =8v v in =12v 1 10 100 1000 ripple voltage v rpp (mv) r1221n50xb r1221n 15 l=27 h c=47 f(ta) 0 20 40 60 80 100 120 140 160 180 200 output current i out (ma) v in =4.5v v in =8v v in =12v 1 10 100 1000 ripple voltage v rpp (mv) r1221n33ac l=27 h c=47 f(ta) 0 20 40 60 80 100 120 140 160 180 200 output current i out (ma) v in =6v v in =8v v in =12v 1 10 100 1000 ripple voltage v rpp (mv) r1221n50xc 4) oscillator frequency vs. input voltage l=27 h 0 100 200 300 400 500 600 input voltage v in (v) 0 5 10 15 oscillator frequency fosc(khz) r1221n15xb l=27 h 0 100 200 300 400 500 600 input voltage v in (v) 0 5 10 15 oscillator frequency fosc(khz) r1221n15xa 5) output voltage vs. input voltage l=27 h 1.47 1.48 1.49 1.50 1.51 1.52 1.53 input voltage v in (v) 0 5 10 15 output voltage v out (v) r1221n15xb l=27 h 1.47 1.48 1.49 1.50 1.51 1.52 1.53 input voltage v in (v) 0 5 10 15 output voltage v out (v) r1221n15xa r1221n 16 l=27 h 3.24 3.26 3.28 3.30 3.32 3.34 3.36 input voltage v in (v) 0 5 10 15 output voltage v out (v) r1221n33ab l=27 h 3.24 3.26 3.28 3.30 3.32 3.34 3.36 input voltage v in (v) 0 5 10 15 output voltage v out (v) r1221n33aa 6) output voltage vs. temperature l=27 h 3.27 3.28 3.29 3.30 3.31 temperature topt ( c) -50 0 50 100 output voltage v out (v) r1221n33ah l=27 h v in =2.7v 1.47 1.48 1.49 1.50 1.51 temperature topt ( c) -50 0 50 100 output voltage v out (v) r1221n15xb 7) detector threshold vs. temperature temperature topt ( c) -50 0 50 100 1.97 1.98 1.99 2.00 2.01 detector threshold vd out (v) v in =6v r1221n25xa(vd=2.0v) temperature topt ( c) -50 0 50 100 1.18 1.19 1.20 1.21 1.22 detector threshold vd out (v) v in =6v r1221n15xb(vd=1.2v) r1221n 17 temperature topt ( c) -50 0 50 100 2.94 2.96 2.98 3.00 3.04 3.02 3.06 detector threshold vd out (v) v in =6v r1221n33ab(vd=3.0v) 8) oscillator frequency vs. temperature temperature topt ( c) -50 0 50 100 400 450 500 550 600 oscillator frequency fosc(khz) l=27 h v in =4.5v r1221n33ab l=27 h v in =3.7v temperature topt ( c) -50 0 50 100 240 260 280 300 340 320 360 oscillator frequency fosc(khz) r1221n25xa 9) supply current vs. temperature temperature topt ( c) -50 0 50 100 90 95 105 100 110 115 120 130 125 135 supply current1 ( a) r1221n33ah v in =15v v in =13.2v v in =8v temperature topt ( c) -50 0 50 100 50 60 70 80 90 100 supply current1 ( a) r1221n33ag v in =15v v in =13.2v v in =8v r1221n 18 10) soft-start time vs. temperature temperature topt ( c) -50 0 50 100 0 2 4 6 8 10 r1221n33ab soft-start time (msec) l=27 h v in =4.5v temperature topt ( c) -50 0 50 100 2 4 6 8 10 12 r1221n25xa soft-start time (msec) l=27 h v in =3.7v 11) delay time for latch-type protection vs. temperature temperature topt ( c) -50 0 50 100 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 delay time for latch-type protection (msec) v in =4.5v r1221n33ab temperature topt ( c) -50 0 50 100 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 delay time for latch-type protection (msec) v in =3.7v r1221n25xa 12) delay time for reset-type protection vs. temperature temperature topt ( c) -50 0 50 100 0 1 2 3 4 5 delay time for reset-type protection (msec) v in =4.5v r1221n33ah temperature topt ( c) -50 0 50 100 0 1 2 3 4 5 delay time for reset-type protection (msec) v in =4.5v r1221n33ag r1221n 19 13) vd output delay time vs. temperature v in =8.0v temperature topt ( c) -50 0 50 100 0 1 2 3 4 5 6 vd output delay time (msec) r1221n33ab v in =8.0v temperature topt ( c) -50 0 50 100 0 1 2 3 4 5 6 vd output delay time (msec) r1221n25xa 14) ext"h" output current vs. temperature temperature topt ( c) -50 0 50 100 0 2 4 6 8 10 12 14 16 ext"h"output current (ma) r1221n33ab 15) ext "l" output current vs. temperature temperature topt ( c) -50 0 50 100 0 5 10 15 20 25 30 ext"l" output current (ma) r1221n33ab r1221n 20 16) vd out "l" output current vs. temperature temperature topt ( c) -50 0 50 100 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 vdlc (ma) r1221n33ad 17) load transient response time (sec) 0 0.0005 0.001 0.1 500 3 3.2 3.4 output voltage v out (v) r1221n33aa v in =5v l=27 h output current i out (ma) time (sec) 0 0.05 0.1 0.1 500 3.3 3.4 3.5 3.6 output voltage v out (v) r1221n33aa v in =5v l=27 h output current i out (ma) time (sec) 0 0.0005 0.001 0.1 500 3 3.1 3.2 3.3 3.4 output voltage v out (v) r1221n33ab v in =5v l=27 h output current i out (ma) time (sec) 0 0.05 0.1 0.1 500 3.3 3.4 3.5 3.6 output voltage v out (v) r1221n33ab v in =5v l=27 h output current i out (ma) r1221n 21 time (sec) 0 0.0005 0.001 0.1 500 2.8 2.9 3 3.1 3.2 3.3 3.4 output voltage v out (v) r1221n33ac v in =5v l=27 h output current i out (ma) time (sec) 0 0.05 0.1 0.1 500 3.3 3.4 3.5 3.6 output voltage v out (v) r1221n33ac v in =5v l=27 h output current i out (ma) time (sec) 0 0.0005 0.001 0.1 500 2.9 3 3.1 3.2 3.3 3.4 output voltage v out (v) r1221n33ad v in =5v l=27 h output current i out (ma) time (sec) 0 0.05 0.1 0.1 500 3.3 3.4 3.5 3.6 output voltage v out (v) r1221n33ad v in =5v l=27 h output current i out (ma) 18) turn-on waveform time (sec) -0.01 0 0.01 0.02 0 10 0 0.5 1 1.5 2 2.5 3 3.5 output voltage v out (v) r1221n33aa (v in =10v,i out =0ma) l=27 h ce voltage(v) time (sec) -0.01 0 0.01 0.02 0 5 0 0.5 1 1.5 2 2.5 3 3.5 output voltage v out (v) r1221n33aa (v in =5v,i out =0ma) l=27 h ce voltage (v) r1221n 22 time (sec) -0.01 0 0.01 0.02 0 10 0 0.5 1 1.5 2 2.5 3 3.5 output voltage v out (v) r1221n33ab (v in =10v,i out =0ma) l=27 h ce voltage(v) time (sec) -0.01 0 0.01 0.02 0 5 0 0.5 1 1.5 2 2.5 3 3.5 output voltage v out (v) r1221n33ab (v in =5v,i out =0ma) l=27 h ce voltage(v) time (sec) -0.01 0 0.01 0.02 0 10 0 0.5 1 1.5 2 2.5 3 3.5 output voltage v out (v) r1221n33aa (v in =10v,i out =100ma) l=27 h ce voltage(v) time (sec) -0.01 0 0.01 0.02 0 5 0 0.5 1 1.5 2 2.5 3 3.5 output voltage v out (v) r1221n33aa (v in =5v,i out =100ma) l=27 h ce voltage(v) time (sec) -0.01 0 0.01 0.02 0 10 0 0.5 1 1.5 2 2.5 3 3.5 output voltage v out (v) r1221n33ab (v in =10v,i out =100ma) l=27 h ce voltage(v) time (sec) -0.01 0 0.01 0.02 0 5 0 0.5 1 1.5 2 2.5 3 3.5 output voltage v out (v) r1221n33ab (v in =5v,i out =100ma) l=27 h ce voltage(v) |
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