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sot-23-5 vfm step-up dc/dc converter
1 no. ea-045-0204 outline

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rn5rkxx1a/xx1b/xx2a 2 block diagram + 2 5 1 vr e f v out gnd ce - 5 4 v lx limiter buffer vfm control osc 100khz chip enable ext* lx* *) l x pin: only for rn5rkxx
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rn5rkxx1a/xx1b/xx2a 3 pin configuration sot-23-5 12 3 54 (mark side) pin description pin no. symbol pin description
, ,$(a$ !! ! $ $*a$.a'!()-%# (- 6 $$# $ d ?" ?!$a$ / ' #$*a$#$"$ pin no. symbol pin description
, ,$(a$ !! ! $ $*a$.a'!()-%# (- 6 $$# $ d ?" ?!$a$ ,2 , $(+"%a$! !
rn5rkxx1a/xx1b/xx2a 4 absolute maximum ratings symbol item rating unit !! ! a$( * < / a$( * < ,2a$( * e7+6 f7+6 ,a$( * e7+6 f7+6 & / a$! ! !$ 77 0 & ,2a$! ! !$ :67 0 a a'" $ 7 0g $*0 !$* ed7 f= @ * *0 !$* e f
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rn5rkxx1a/xx1b/xx2a 5 electrical characteristics ? rn5rkxx1a/xx1b h@ symbol item conditions min. typ. max. unit ! ! ( *
h 7+i.& h
0 7+<>
+7
&$! ( * = ? ? ! ! ( *0 ! --#$ d7@ =@ :
77 0@ 3( *
h7 7+> 7+<7 ? ? 3( *0 !--#$ d7@ =@
h7
+i 0@ ( 9($( *

h 7 7+> ( 9($( *

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8 # 0!0#(( b!$#) h h 7+77
7 495 ? # ? topt b!$#)0 ! --#$ d7@ =@ 7+d
495 @ "! ) #(( "! ))#(
h h 7+7 >> = ; "! ) #(( "! ))#(
h h 7+ i6 ; / ( */0 h h
+<./ ' # 7+d 7+i 7+= ,j9k&$! ( * h h 7+ +7 +d 7 8 & !()!$
+ +< 67 8
rn5rkxx1a/xx1b/xx2a 6 symbol item conditions min. typ. max. unit & !()!$
6+7 6+d 6 i7 8 & !()!$
6+ 6+< d7 i 8 !()!$
d+7 d+d d > 8 !()!$
d+ d+< 7 =7 8 !()!$
+7 + i7 <7 8 &/ / ' #$*!$ +7 +d./ h7+d =7 0 &/ / ' #$*!$ + +<./ h7+d
77 0 &/ / ' #$*!$ 6+7 6+d./ h7+d
7 0 &/ / ' #$*!$ 6+ 6+<./ h7+d
d7 0 &/ / ' #$*!$ d+7 d+d./ h7+d
i7 0 &/ / ' #$*!$ d+ d+<./ h7+d
=7 0 &/ / ' #$*!$ +7 +./ h7+d 77 0 *1) condition: an output load resistor r l is connected between v out and gnd. note that the resistor r l has a resistance which makes an output current 1ma after step-up operation. *2) the supply current 1 (i dd1 ) for ic itself is measured when the internal oscillator works continuously. if the oscillator works intermittently, the supply current becomes smaller than the value which is written on the above table. measurement condition: v out =v ce =setting output voltage 0.96
rn5rkxx1a/xx1b/xx2a 7 ? rn5rkxx2a h@ symbol item conditions min. typ. max. unit ! ! ( *
h 7+i.& h
0 7+<>
+7
&$! ( * = ? v out ? topt output voltage temperature coefficient d7@ =@ :
77 0@ 3( *
h7 7+> 7+= ? vstart/ ? topt start-up voltage temperature coefficient -40c topt 85c v in =0v 2v
+i 0@ & !()!$ h h f7+ 8 & $) $)!$ hi. h7 7+ 8 # 0!0#(( b!$#) h h 7+77
7 495 ? # ? topt b!$#)0 ! --#$ d7@ =@ 7+d
495@ "! ) #(( "! ))#( h h 7+7 >> = ; ,j9k&$! ( * h h 7+ +7 +<.,2$( 7 d7 8 & !()!$
6+7 6+<.,2$( 7 8 & !()!$
d+7 d+<.,2$( 67 i7 8 & !()!$
+7 +.,2$( 6 >7 8 & ,2j9k! ! ( * +7 +<. h 7+d
+7 0 & ,2j9k! ! ( * 6+7 6+<. h 7+d
+ 0
rn5rkxx1a/xx1b/xx2a 8 symbol item conditions min. typ. max. unit & ,2j9k! ! ( * d+7 +. h 7+d +7 0 & ,2j/k! ! ( * +7 +<. h7+d
+7 0 & ,2j/k! ! ( * 6+7 6+<. h7+d
+ 0 & ,2j/k! ! ( * d+7 +. h7+d +7 0 *1) condition: an output load resistor r l is connected between v out and gnd. note that the resistor r l has a resistance which makes an output current 1ma after step-up operation. *2) the supply current 1 (i dd1 ) for ic itself is measured when the internal oscillator works continuously. if the oscillator works intermittently, the supply current becomes smaller than the value which is written on the above table. measurement condition: v out =v ce =setting output voltage 0.96
rn5rkxx1a/xx1b/xx2a 9 test circuits lx sbd c l r l gnd v out l v in ce v c l 1k ? a lx gnd v out ce test circuit 1 test circuit 2 c l oscilloscope lx gnd v out ce test circuit 3 *) when v lx lim and i lx are measured, the 5 ? resistor is used. otherwise 1k ? is used. 0$$ &$!# / 1
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rn5rkxx1a/xx1b/xx2a 10 sbd c l rb cb l v in tr v ext gnd v out ce c l a ext gnd v out ce test circuit 1 test circuit 2 c l ext gnd v out ce oscilloscope c l oscilloscope ext 100 ? gnd v out ce test circuit 3 test circuit 4 0$$ &$!# / 1>89!0,(# #+./ m"
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rn5rkxx1a/xx1b/xx2a 11 typical characteristics ? rn5rkxx1a/b 1) output voltage vs. output current (topt=25c) rn5rk301a rn5rk301a 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 output current i out (ma) output voltage v out (v) 0 204060 160 140 80 100 120 l=100 h 1.0v 1.3v 1.5v 2.0v v in =0.9v 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 output current i out (ma) output voltage v out (v) 0 204060 160 140 80 100 120 l=220 h 1.0v 1.5v 2.0v 1.3v v in =0.9v rn5rk301b rn5rk301b 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 output current i out (ma) output voltage v out (v) 0 102030 50 40 l=100 h 1.5v 2.0v 1.3v v in =1.0v 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 output current i out (ma) output voltage v out (v) 0 102030 50 40 l=220 h 1.5v 2.0v 1.3v v in =1.0v rn5rk501a rn5rk501a 6 5 4 3 2 1 0 output current i out (ma) output voltage v out (v) 0 50 100 150 200 l=100 h 1.5v 2.0v 3.0v 4.0v v in =0.9v 6 5 4 3 2 1 0 output current i out (ma) output voltage v out (v) 0 50 100 150 200 l=220 h 1.5v 2.0v 3.0v 4.0v v in =0.9v
rn5rkxx1a/xx1b/xx2a 12 rn5rk501b rn5rk501b 6 5 4 3 2 1 0 output current i out (ma) output voltage v out (v) 0 50 100 150 200 l=100 h 2.0v 2.5v 3.0v 4.0v v in =1.5v 6 5 4 3 2 1 0 output current i out (ma) output voltage v out (v) 0 50 100 150 200 l=220 h 2.0v 2.5v 3.0v 4.0v v in =1.5v 2) efficiency vs. output current (topt=25 c) rn5rk301a rn5rk301a 100 90 80 70 60 50 40 output current i out (ma) efficiency (%) 0 204060 160 140 80 100 120 l=100 h 1.0v 2.0v v in =0.9v 1.3v 1.5v 100 90 80 70 60 50 40 output current i out (ma) efficiency (%) 0 20 40 60 160 140 80 100 120 l=220 h 1.0v 2.0v v in =0.9v 1.3v 1.5v rn5rk301b rn5rk301b 100 90 80 70 60 50 40 output current i out (ma) efficiency (%) 0 102030 50 40 l=100 h 1.5v 2.0v 1.3v v in =1.0v 100 90 80 70 60 50 output current i out (ma) efficiency (%) 0 102030 50 40 l=220 h 2.0v 1.5v 1.3v v in =1.0v
rn5rkxx1a/xx1b/xx2a 13 rn5rk501a rn5rk501a 100 90 80 70 60 50 40 output current i out (ma) efficiency (%) 0 50 100 150 200 l=100 h 1.5v 2.0v 3.0v 4.0v v in =0.9v 100 90 80 70 60 50 40 output current i out (ma) efficiency (%) 0 50 100 150 200 l=220 h 1.5v 2.0v 3.0v 4.0v v in =0.9v rn5rk501b rn5rk501b 100 90 80 70 60 50 40 output current i out (ma) efficiency (%) 0 50 100 150 200 l=100 h 2.0v 2.5v v in =1.5v 4.0v 3.0v 100 90 80 70 60 50 40 output current i out (ma) efficiency (%) 0 50 100 150 200 l=220 h 2.0v 2.5v v in =1.5v 4.0v 3.0v 3) ripple voltage vs. output current (topt=25 c) rn5rk301a rn5rk301a 140 120 100 80 60 40 20 0 output current i out (ma) ripple voltage vr(mvp-p) 0 20 40 60 160 140 80 100 120 l=100 h 1.5v 2.0v v in =0.9v 1.0v 1.3v 160 140 120 100 80 60 40 20 0 output current i out (ma) ripple voltage vr(mvp-p) 040 20 80 60 100 160 140 120 l=220 h 2.0v v in =0.9v 1.0v 1.3v 1.5v
rn5rkxx1a/xx1b/xx2a 14 rn5rk301b rn5rk301b 45 40 35 30 25 20 15 10 5 0 output current i out (ma) ripple voltage vr(mvp-p) 0 102030 50 40 l=100 h 2.0v v in =1.0v 1.3v 1.5v 45 40 35 30 25 20 15 10 5 0 output current i out (ma) ripple voltage vr(mvp-p) 0 102030 50 40 l=220 h 2.0v 1.3v 1.0v 1.5v rn5rk501a rn5rk501a 200 150 100 50 0 output current i out (ma) ripple voltage vr(mvp-p) 0 50 100 150 200 l=100 h 2.0v 4.0v 3.0v 1.5v v in =0.9v 200 150 100 50 0 output current i out (ma) ripple voltage vr(mvp-p) 0 50 100 150 200 l=220 h 2.0v 4.0v 3.0v 1.5v v in =0.9v rn5rk501b rn5rk501b 140 120 100 80 60 40 20 0 output current i out (ma) ripple voltage vr(mvp-p) 0 50 100 150 200 l=100 h 4.0v 2.0v 3.0v 2.5v v in =1.5v 140 120 100 80 60 40 20 0 output current i out (ma) ripple voltage vr(mvp-p) 0 50 100 150 200 l=220 h 4.0v 3.0v 2.5v v in =1.5v
rn5rkxx1a/xx1b/xx2a 15 4) start-up/hold-on voltage vs. output current (topt=25 c) rn5rk301a rn5rk501a 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 output current i out (ma) start-up/hold-on voltage vstart/vhold(v) 015 10 5 l=100 h vstart vhold 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 output current i out (ma) start-up/hold-on voltage vstart/vhold(v) 015 10 5 l=100 h vhold vstart rn5rk301b rn5rk501b 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 output current i out (ma) start-up/hold-on voltage vstart/vhold(v) 015 10 5 l=100 h vstart vhold 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 output current i out (ma) start-up/hold-on voltage vstart/vhold(v) 015 10 5 l=100 h vstart vhold 5) output voltage vs. temperature rn5rk301a rn5rk501a 3.10 3.05 3.00 2.95 2.90 temperature topt( ) output voltage v out (v) -50 -25 100 75 02550 v in =1.5v,l=100 h i out =0 m a i out =10 m a i out =30 m a 5.10 5.05 5.00 4.95 4.90 temperature topt( ) output voltage v out (v) -50 -25 100 75 02550 v in =3.0v,l=100 h i out =30 m a i out =0 m a i out =10 m a
rn5rkxx1a/xx1b/xx2a 16 6) start-up voltage vs. temperature rn5rk501a rn5rk501b 1 0.8 0.6 0.4 0 0.2 temperature topt( ) start-up voltage vstart(v) -50 -25 100 75 02550 l=100 h 1 0.8 0.6 0.4 0 0.2 temperature topt( ) start-up voltage vstart(v) -50 -25 100 75 02550 l=100 h 7) hold-on voltage vs. temperature rn5rk501a rn5rk501b 1 0.8 0.6 0.4 0 0.2 temperature topt( ) hold-on voltage vhold(v) -50 -25 100 75 02550 l=100 h 1 0.8 0.6 0.4 0 0.2 temperature topt( ) hold-on voltage vhold(v) -50 -25 100 75 02550 l=100 h 8) lx switching current vs. temperature rn5rk301a rn5rk501a 500 400 300 200 0 100 temperature topt( ) lx switching current ilx(ma) -50 -25 100 75 02550 500 400 300 200 0 100 temperature topt( ) lx switching current ilx(ma) -50 -25 100 75 02550
rn5rkxx1a/xx1b/xx2a 17 9) supply current 1 vs. temperature rn5rk301a rn5rk501a 50 40 30 20 10 temperature topt( ) supply current 1 i dd1 ( a) -50 -25 100 75 02550 80 70 60 50 30 40 temperature topt( ) supply current 1 i dd1 ( a) -50 -25 100 75 02550 10) supply current 2 vs. temperature 11) standby current 3 vs. temperature rn5rk301a rn5rk301a 5 4 3 2 0 1 temperature topt( ) supply current 2 i dd2 ( a) -50 -25 100 75 02550 1 0.8 0.6 0.4 0 0.2 temperature topt( ) supply current 3 istandby( a) -50 -25 100 75 02550 12) oscillator duty cycle vs. temperature rn5rk301a rn5rk301b 85 80 75 70 temperature topt( ) oscullator duty cycle maxduty( % ) -50 -25 100 75 02550 60 58 56 54 50 52 temperature topt( ) oscullator duty cycle maxduty( % ) -50 -25 100 75 02550
rn5rkxx1a/xx1b/xx2a 18 13) ce ? h ? input voltage vs. temperature 14) ce ? l ? input voltage vs. temperature rn5rk301a rn5rk301a 1 0.8 0.6 0.4 0 0.2 temperature topt( ) ce h input voltage v ceh ( v ) -50 -25 100 75 02550 1 0.8 0.6 0.4 0 0.2 temperature topt( ) ce l input voltage v cel ( v ) -50 -25 100 75 02550 15) maximum oscillator frequency vs. temperature 16) vlx voltage limit vs. temperature rn5rk301a rn5rk301a 120 110 100 90 80 70 60 50 temperature topt( ) maximum oscillator frequency f osc (khz) -50 -25 100 75 02550 0.8 0.7 0.6 0.5 0.4 temperature topt( ) v lx voltage limit v lx (v) -50 -25 100 75 02550
rn5rkxx1a/xx1b/xx2a 19 ? rn5rkxx2a 1) output voltage vs. output current (topt=25 c) rn5rk302a rn5rk502a 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 output current i out (ma) output voltage v out (v) 0 200 400 600 800 l=27 h 2.0v 1.0v 1.5v 1.3v v in =0.9v 6.0 5.0 4.0 3.0 2.0 1.0 0.0 output current i out (ma) output voltage v out (v) 0 200 400 600 800 l=27 h 1.5v 2.0v 3.0v v in =1.0v 2) efficiency vs. output current (topt=25 c) rn5rk302a rn5rk502a 100 90 80 70 60 50 40 output current i out (ma) efficiency (%) 0 200 400 600 800 l=27 h 1.0v 2.0v v in =0.9v 1.3v 1.5v 100 90 80 70 60 50 30 40 output current i out (ma) efficiency (%) 0 200 400 600 800 l=27 h 3.0v 1.5v 2.0v v in =1.0v 3) ripple voltage vs. output current (topt=25 c) rn5rk302a rn5rk502a 250 200 150 100 50 0 output current i out (ma) ripple voltage vr(mvp-p) 0 200 400 600 800 l=27 h 2.0v 1.5v 1.3v 1.0v v in =0.9v 300 250 200 150 100 50 0 output current i out (ma) ripple voltage vr(mvp-p) 0 200 400 600 800 l=27 h 3.0v 2.0v 1.5v v in =1.0v
rn5rkxx1a/xx1b/xx2a 20 4) start-up/hold-on voltage vs. output current (topt=25 c) rn5rk302a rn5rk502a 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 output current i out (ma) start-up/hold-on voltage vstart/vhold(v) 0 200 150 100 50 l=27 h v hold v start 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.4 0.2 0.6 0.0 output current i out (ma) start-up/hold-on voltage vstart/vhold(v) 0 200 150 100 50 l=27 h vstart,vhold 5) output voltage vs. temperature rn5rk302a rn5rk502a 3.10 3.00 2.90 3.05 2.95 2.85 2.80 temperature topt( ) output voltage v out (v) -50 -25 100 75 02550 v in =1.2v,l=27 h i out =0 m a i out =50 m a i out =100 m a 5.10 5.00 5.05 4.95 4.90 temperature topt( ) output voltage v out (v) -50 -25 100 75 02550 v in =3.0v,l=27 h i out =0 m a i out =50 m a i out =100 m a 6) ext ? h ? output current vs. temperature rn5rk302a rn5rk502a 10 9 8 7 6 5 4 0 3 2 1 temperature topt( ) ext h output current i exth (ma) -50 -25 100 75 02550 10 9 8 7 6 5 4 0 3 2 1 temperature topt( ) ext h output current i exth (ma) -50 -25 100 75 02550
rn5rkxx1a/xx1b/xx2a 21 7) ext ? l ? output current vs. temperature rn5rk302a rn5rk502a 20 18 16 14 12 10 8 0 6 4 2 temperature topt( ) ext l output current i extl (ma) -50 -25 100 75 02550 20 18 16 14 12 10 8 0 6 4 2 temperature topt( ) ext l output current i extl (ma) -50 -25 100 75 02550 8) supply current 1 vs. temperature rn5rk302a rn5rk502a 50 40 30 20 0 10 temperature topt( ) supply current 1 i dd1 ( a) -50 -25 100 75 02550 50 40 30 20 0 10 temperature topt( ) supply current 1 i dd1 ( a) -50 -25 100 75 02550 9) supply current 2 vs. temperature 10) standby current vs. temperature rn5rk302a rn5rk302a 5 4 3 2 0 1 temperature topt( ) supply current 2 i dd2 ( a) -50 -25 100 75 02550 1 0.8 0.6 0.4 0 0.2 temperature topt( ) supply current 3 istandby( a) -50 -25 100 75 02550
rn5rkxx1a/xx1b/xx2a 22 11) oscillator duty cycle vs. temperature 12) maximum oscillator frequency vs. temperature rn5rk302a rn5rk302a 85 80 75 70 temperature topt( ) oscullator duty cycle maxduty( % ) -50 -25 100 75 02550 120 110 100 90 80 70 60 50 temperature topt( ) maximum oscillator frequency f osc (khz) -50 -25 100 75 02550 13) ce ? h ? input voltage vs. temperature 14) ce ? l ? input voltage vs. temperature rn5rk302a rn5rk302a 1 0.8 0.6 0.4 0 0.2 temperature topt( ) ce h input voltage v ceh ( v ) -50 -25 100 75 02550 1 0.8 0.6 0.4 0 0.2 temperature topt( ) ce l input voltage v cel ( v ) -50 -25 100 75 02550

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