NO. EA-045-0006
62705608#9)0#67(3083#'&2'&
&219(57(5
5185.
××
4$2
××
4%2
××
5$#6(5,(6
$33/,&$7,21#0$18$/
SOT-23 -5 VFM STEP-UP DC/DC CONV ERTER
5185.××
××××
××4$2××
××××
××4%2××
××××
××5$#6(5,(6
1
OUTLINE
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UHQW#DQG#KLJK#RXWSXW#YROWDJH#DFFXUDF\#E\#&026#SURFHVV1
(DFK#RI#WKH#5185.××4$2××4%#FRQVLVWV#RI#DQ#RVFLOODWRU/#D#9)0#FRQWURO#FLUFXLW/#D#GULYHU#WUDQVLVWRU#WR#KDYH#ORZ#21
UHVLVWDQFH#+/[#VZLWFK,/#D#UHIHUHQFH#YROWDJH#XQLW/#D#KLJK#VSHHG#FRPSDUDWRU/#UHVLVWRUV#IRU#YROWDJH#GHWHFWLRQ/#DQ#/[#VZLWFK
SURWHFWLRQ#FLUFXLW#DQG#DQ#LQWHUQDO#FKLS#HQDEOH#FLUFXLW1##$#ORZ#ULSSOH/#KLJK#HIILFLHQF\#VWHS0XS#'&2'&#FRQYHUWHU#FDQ#EH
FRPSRVHG#RI#WKLV#5185.××4$2××4%#ZLWK#RQO\#WKUHH#H[WHUQDO#FRPSRQHQWV=#DQ#LQGXFWRU/#D#GLRGH#DQG#D#FDSDFLWRU1
7KH#5185.××5$#XVHV#WKH#VDPH#FKLS#DV#ZKDW#LV#HPSOR\HG#LQ#WKH#5185.××4$24%#,&#DQG#KDV#D#GULYH#SLQ#+(;7,#IRU
DQ#H[WHUQDO#WUDQVLVWRU#LQVWHDG#RI#DQ#/[#SLQ1# # $V#LW#LV#SRVVLEOH#WR#ORDG#D#ODUJH#RXWSXW#FXUUHQW#ZLWK#D#SRZHU#WUDQVLVWRU
ZKLFK#KDV#D#ORZ#VDWXUDWLRQ#YROWDJH/#5185.××5$#,&#LV#UHFRPPHQGDEOH#WR#XVHUV#ZKR#QHHG#DQ#RXWSXW#FXUUHQW#DV#ODUJH#DV
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8VLQJ#WKH#FKLS#HQDEOH#IXQFWLRQ/#LW#LV#SRVVLEOH#WR#PDNH#WKH#VXSSO\#FXUUHQW#RQ#VWDQGE\#PLQLPL]HG1
6LQFH#WKH#SDFNDJH#IRU#WKHVH#,&V#DUH#62705608#+0LQL0PROG,/#KLJK#GHQVLW\#PRXQWLQJ#RI#WKH#,&V#RQ#ERDUG#LV#SRVVLEOH1
FEATURES
• 6PDOO#1XPEHU#RI#([WHUQDO#&RPSRQHQWV 111111111111111111111111111 2QO\#DQ#LQGXFWRU/#D#GLRGH#DQG#D#FDSDFLWRU
+5185.××4$2××4%,
• 8OWUD#/RZ#,QSXW#&XUUHQW#RQ#6WDQGE\ 11111111111111111111111111111111 7<31#3—$
• +LJK#2XWSXW#9R O W D J H #$FFXUDF\ 111111111111111111111111111111111111111111 “518(
• /RZ#5LSSOH#DQG#/RZ#1RLVH
• /RZ#6WDUW0XS#9R O W D J H 1111111111111111111111111111111111111111111111111111111111 0$;1#31<9
• +LJK#(IILFLHQF\ 1111111111111111111111111111111111111111111111111111111111111111111 7<31#;3(
• ,QFOXGLQJ#D#'ULYHU#7UDQVLVWRU#ZLWK#/RZ#21#5HVLVWDQFH
• 7Z R #.LQGV#RI#'XW\#5DWLR1111111111111111111111111111111111111111111111111111 ::(#+××4$/#××5$,2#88(#+××4%,
• 2XWSXW#9R O W D J H 11111111111111111111111111111111111111111111111111111111111111111111 6WHSZLVH#VHWWLQJ#ZLWK#D#VWHS#RI#3149#LQ#WKH#UDQJH#RI#5139#WR
8189#LV#SRVVLEOH#+UHIHU#WR#6HOHFWLRQ#*XLGH,
• /RZ#7HPSHUDWXUH0'ULIW#&RHIILFLHQW#RI#2XWSXW#9R O W D J H 11111 7<31#“433SSP2ƒ&
• 6PDOO#3DFNDJHV 1111111111111111111111111111111111111111111111111111111111111111111 62705608#+0LQL00ROG,
APPLICATIONS
• 3RZHU#VRXUFH#IRU#EDWWHU\0SRZHUHG#HTXLSPHQW1
• 3RZHU#VRXUFH#IRU#FDPHUDV/#FDPFRUGHUV/#9&5V/##DQG#KDQG0KHOG#FRPPXQLFDWLRQ#HTXLSPHQW1
• 3RZHU#VRXUFH#IRU#WKRVH#DSSOLDQFHV#ZKLFK#UHTXLUH#KLJKHU#FHOO#YROWDJH#WKDQ#WKDW#RI#EDWWHULHV1
RN5RK××1A/××1B/××2A
2
BLOCK DIAGRAM
+
2
5
1
Vref V
OUT
GND
CE
-
5
4
V
LX
Limiter
Buffer
VFM Control
OSC 100kHz
Chip Enable
EXT*
Lx*
*) LX pin: only for RN5RK××4$2××4%
SELECTION GUIDE
7KH#RXWSXW#YROWDJH/#WKH#GULYHU#W\SH/#WKH#GXW\#F\FOH#DQG#WKH#WDSLQJ#W\SH#IRU#WKH#,&V#FDQ#EH#VHOHFWHG#DW#WKH#XVHU*V#UH0
TXHVW1
7KH#VHOHFWLRQ#FDQ#EH#PDGH#E\#GHVLJQDWLQJ#WKH#SDUW#QXPEHU#DV#VKRZQ#EHORZ=
5185.#××××0××#←3DUW#1XPEHU
↑↑↑ ↑
DEF G
Code Contents
D6HWWLQJ#2XWSXW#9R O W D J H #+9287,#=
6WHSZLVH#VHWWLQJ#ZLWK#D#VWHS#RI#3149#LQ#WKH#UDQJH#RI#5139#WR#8189#LV#SRVVLEOH1
E
'HVLJQDWLRQ#RI#'ULYHU
4=#,QWHUQDO#/[#7U1#'ULYHU
5=#([WHUQDO#7U1#'ULYHU
F
'HVLJQDWLRQ#RI#'XW\#&\FOH
$=#::(
%=#88(
G'HVLJQDWLRQ#RI#7DSLQJ#W\SH
([1#75/#7/#+UHIHU#WR#7DSLQJ#6SHFLILFDWLRQV/#75#W\SH#LV#SUHVFULEHG#DV#D#VWDQGDUG1,
RN5RK××1A/××1B/××2A
3
PIN CONFIGURATION SOT-23-5
12
3
54
(mark side)
PIN DESCRIPTION
Pin No. Symbol Pin description
4&( &KLS#(QDEOH#3LQ
59287 6WHS0XS#2XWSXW#0RQLWRULQJ#3LQ/#3RZHU#6XSSO\#+IRU#GHYLFH#LWVHOI,
61& 1R#&RQQHFWLRQ
7*1' *URXQG#3LQ
8/;6ZLWFKLQJ#3LQ#+1FK#2SHQ#'UDLQ,
Pin No. Symbol Pin description
4&( &KLS#(QDEOH#3LQ
59287 6WHS0XS#2XWSXW#0RQLWRULQJ#3LQ/#3RZHU#6XSSO\#+IRU#GHYLFH#LWVHOI,
61& 1R#&RQQHFWLRQ
7*1' *URXQG#3LQ
8(;7 ([WHUQDO#7U1#'ULYH#3LQ#+&026#2XWSXW,
RN5RK××1A/××1B/××2A
4
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
9287 6WHS0XS#2XWSXW#3LQ#9R O W D J H <9
9/; /;#3LQ#9R O W D J H <9
9(;7 (;7#3LQ#9R O W D J H ² 316#WR#9287#.316 9
9&( &(#3LQ#9R O W D J H ² 316#WR#9287#.316 9
,/; /[#3LQ#2XWSXW#&XUUHQW 833 P$
,(;7 (;7#3LQ#2XWSXW#&XUUHQW “63 P$
3'3RZHU#'LVVLSDWLRQ 583 P:
7RSW 2SHUDWLQJ#7HPSHUDWXUH#5DQJH ²73#WR#.;8 ƒ&
7V W J 6 W R U D J H #7HPSHUDWXUH#5DQJH ²88#WR#.458 ƒ&
ABSOLUTE MAXIMUM RATINGS
$EVROXWH#0D[LPXP#UDWLQJV#DUH#WKUHVKROG#OLPLW##YDOXHV#WKDW#PXVW#QRW#EH#H[FHHGHG#HYHQ#IRU#DQ#LQVWDQW#XQGHU#DQ\#FRQ0
GLWLRQV1#0RUHRYHU/#VXFK#YDOXHV#IRU#DQ\#WZR#LWHPV#PXVW#QRW#EH#UHDFKHG#VLPXOWDQHRXVO\1#2SHUDWLRQ#DERYH#WKHVH#DEVR0
OXWH#PD[LPXP#UDWLQJV#PD\#FDXVH#GHJUDGDWLRQ#RU#SHUPDQHQW#GDPDJH#WR#WKH#GHYLFH1#7KHVH#DUH#VWUHVV#UDWLQJV#RQO\#DQG
GR#QRW#QHFHVVDULO\#LPSO\#IXQFWLRQDO#RSHUDWLRQ#EHORZ#WKHVH#OLPLWV1
RN5RK××1A/××1B/××2A
5
ELECTRICAL CHARACTERISTICS
• RN5RK 1A/ 1B 7R S W 58ƒ&
Symbol Item Conditions MIN. TYP. MAX. Unit
9287 2XWSXW#9R O W D J H 9 ,1 VHW#9287×319/#,287 4P$ ×31<:8 ×41358 9
9,1 ,QSXW#9R O W D J H ;9
∆92872∆7R S W 2XWSXW#9R O W D J H #7HPSHUDWXUH
&RHIILFLHQW 073ƒ&≤7R S W ≤;8ƒ& “433 SSP2ƒ&
9VWDUW 6WDUW08S#9R O W D J H 9 ,1 39→59-4 31:8 31< 9
∆9VWDUW2∆7R S W 6WDUW08S#9R O W D J H #7H P S H U D 0
WXUH#&RHIILFLHQW
073ƒ&≤7R S W ≤;8ƒ&
9,1 39→59-40419 P92ƒ&
9KROG +ROG0RQ#9R O W D J H #+××4$,9,1 59→39-431: 9
9KROG +ROG0RQ#9R O W D J H #+××4%,9,1 59→39-431< 9
,''56XSSO\#&XUUHQW59287 9&( VHW#9287.318958—$
,VWDQE\ 6WDQGE\#&XUUHQW 9287 99/#9&( 39318 —$
,/;OHDN /[#/HDNDJH#&XUUHQW 9287 9/; ;94—$
IRVF 0D[LPXP#2VFLOODWRU#)UH0
TXHQF\ 9287 9&( VHW#9287×31<9 ;3 433 453 N+]
∆IRVF2∆Topt )UHTXHQF\#7HPSHUDWXUH#&R0
HIILFLHQW 073ƒ&≤7R S W ≤;8ƒ& 3174 N+]2
ƒ&
'XW\ 2VFLOODWRU#'XW\#&\FOH#+××4$,9287 9&( VHW#9287×31<9/#21
+9/;#´/µ#VLGH,:3 :: ;8 (
'XW\ 2VFLOODWRU#'XW\#&\FOH#+××4%,9287 9&( VHW#9287×31<9/#21
+9/;#´/µ#VLGH,7: 88 96 (
9O[OLP 9/[#9R O W D J H #/LPLW 9287 9&( 41<89/#/[#6ZLWFK
21 317 319 31; 9
9&(+ &(#´+µ#,QSXW#9R O W D J H
9287 9&( VHW#9287×31<9/
-XGJPHQW#LV#PDGH#E\#WKH#/[
ZDYHIRUP
31< 9
9&(/ &(#´/µ#,QSXW#9R O W D J H
9287 9&( VHW#9287×31<9/
-XGJPHQW#LV#PDGH#E\#WKH#/[
ZDYHIRUP
316 9
,&(+ &(#´+µ#,QSXW#&XUUHQW 9287 9139/#9&( 91390318 3 318 —$
,&(/ &(#´/µ#,QSXW#&XUUHQW 9287 9139/#9&( 31390318 3 318 —$
,''46XSSO\#&XUUHQW4#-5 5139≤9287≤517958 83 —$
,''46XSSO\#&XUUHQW4#-5 5189≤9287≤51<963 88 —$
RN5RK××1A/××1B/××2A
6
Symbol Item Conditions MIN. TYP. MAX. Unit
,''46XSSO\#&XUUHQW4#-5 6139≤9287≤617968 93 —$
,''46XSSO\#&XUUHQW4#-5 6189≤9287≤61<973 98 —$
,''46XSSO\#&XUUHQW4#-57139≤9287≤717978 :8 —$
,''46XSSO\#&XUUHQW4#-57189≤9287≤71<983 ;3 —$
,''46XSSO\#&XUUHQW4#-58139≤9287≤818993 <3 —$
,/;/[#6ZLWFKLQJ#&XUUHQW 5139≤9287≤5179/#9/; 3179;3 P$
,/;/[#6ZLWFKLQJ#&XUUHQW 5189≤9287≤51<9/#9/; 3179433 P$
,/;/[#6ZLWFKLQJ#&XUUHQW 6139≤9287≤6179/#9/; 3179453 P$
,/;/[#6ZLWFKLQJ#&XUUHQW 6189≤9287≤61<9/#9/; 3179473 P$
,/;/[#6ZLWFKLQJ#&XUUHQW 7139≤9287≤7179/#9/; 3179493 P$
,/;/[#6ZLWFKLQJ#&XUUHQW 7189≤9287≤71<9/#9/; 31794;3 P$
,/;/[#6ZLWFKLQJ#&XUUHQW 8139≤9287≤8189/#9/; 3179533 P$
*1) Condition: An Output load resistor RL is connected betw een VOUT and GND.
Note that the resistor RL has a resistance which makes an output current 1mA after step-up operation.
*2) The Supply Current 1 (IDD1) 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: VOUT=VCE=Setting Output Voltage ×0.96
RN5RK××1A/××1B/××2A
7
• RN5RK××
××××
××2A
7R S W 58ƒ&
Symbol Item Conditions MIN. TYP. MAX. Unit
9287 2XWSXW#9R O W D J H 9 ,1 VHW#9287×319/#,287 4P$ ×31<:8 ×41358 9
9,1 ,QSXW#9R O W D J H ;9
∆VOUT2∆Topt Output Voltage Temperature
Coefficient 073ƒ&≤7R S W ≤;8ƒ& “433 SSP2ƒ&
9VWDUW 6WDUW08S#9R O W D J H 9 ,1 39→59-4 31: 31; 9
∆Vstart/∆Topt Start-Up Voltage Temperature
Coefficient
-40°C≤Topt≤85°C
VIN=0V→2V*10419 P92ƒ&
,''56XSSO\#&XUUHQW59287 9&( VHW#9287.318958—$
,VWDQE\ 6WDQGE\#&XUUHQW 9287 99/#9&( 39318 —$
)RVF 0D[LPXP#2VFLOODWRU#)UH0
TXHQF\ 9287 9&( VHW#9287×31<9 ;3 433 453 N+]
∆IRVF2∆Topt )UHTXHQF\#7HPSHUDWXUH#&R0
HIILFLHQW 073ƒ&≤7R S W ≤;8ƒ& 3174 N+]2ƒ&
'XW\ 2VFLOODWRU#'XW\#&\FOH 9287 9&( VHW#9287×31<9/
21#+9(;7#´+µ#VLGH,:3 :: ;8 (
9&(+ &(#´+µ#,QSXW#9R O W D J H
9287 9&( VHW#9287×31<9/
-XGJPHQW#LV#PDGH#E\#WKH#(;7
ZDYHIRUP
31< 9
9&(/ &(#´/µ#,QSXW#9R O W D J H
9287 9&( VHW#9287×31<9
-XGJPHQW#LV#PDGH#E\#WKH#(;7
ZDYHIRUP
316 9
,&(+ &(#´+µ#,QSXW#&XUUHQW 9287 9139/#9&( 91390318 3 318 —$
,&(/ &(#´/µ#,QSXW#&XUUHQW 9287 9139/#9&( 31390318 3 318 —$
,''46XSSO\#&XUUHQW4 5139≤9287≤51<9/#(;7#QR#ORDG-553 73 —$
,''46XSSO\#&XUUHQW4 6139≤9287≤61<9/#(;7#QR#ORDG-558 83 —$
,''46XSSO\#&XUUHQW4 7139≤9287≤71<9/#(;7#QR#ORDG-563 93 —$
,''46XSSO\#&XUUHQW4 8139≤9287≤8189/#(;7#QR#ORDG-568 :3 —$
,(;7+ (;7#´+µ#2XWSXW#9R O W D J H 5139≤9287≤51<9/
9(;7 9287031790413 P$
,(;7+ (;7#´+µ#2XWSXW#9R O W D J H 6139≤9287≤61<9/
9(;7 9287031790418 P$
RN5RK××1A/××1B/××2A
8
Symbol Item Conditions MIN. TYP. MAX. Unit
,(;7+ (;7#´+µ#2XWSXW#9R O W D J H 7139≤9287≤8189/
9(;7 9287031790513 P$
,(;7+ (;7#´/µ#2XWSXW#9R O W D J H 5139≤9287≤51<9/#9(;7 3179413 P$
,(;7+ (;7#´/µ#2XWSXW#9R O W D J H 6139≤9287≤61<9/#9(;7 3179418 P$
,(;7+ (;7#´/µ#2XWSXW#9R O W D J H 7139≤9287≤8189/#9(;7 3179513 P$
*1) Condition: An Output load resistor RL is connected betw een VOUT and GND.
Note that the resistor RL has a resistance which makes an output current 1mA after step-up operation.
*2) The Supply Current 1 (IDD1) 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: VOUT=VCE=Setting Output Voltage ×0.96
RN5RK××1A/××1B/××2A
9
TEST CIRCUITS
Lx
SBD
C
L
R
L
GND
V
OUT
L
V
IN
CE
V
C
L
1KΩ
A
Lx
GND
V
OUT
CE
Test Circuit 1 Test Circuit 2
C
L
Osilloscope
Lx
GND
V
OUT
CE
Test Circuit 3
*) When VLXlim and ILX are measured, the 5Ωresistor is used. Otherwise 1kΩis used.
&RPSRQHQWV#,QGXFWRU +/, =#433—+/#553—+#+6XPLGD#(OHFWULF#&R1/#/WG>#&'087,
'LRGH +6%',=#0$:54#+0DWVXVKLWD#(OHFWURQLFV#&RUSRUDWLRQ>#6FKRWWN\#7\ S H ,
&DSDFLWRU +&/, =#7:—)#+7DQWDOXP#7\ S H ,
8VLQJ#WKHVH#WHVW#FLUFXLWV#FKDUDFWHULVWLFV#GDWD#KDV#EHHQ#REWDLQHG#DV#VKRZQ#RQ#WKH#IROORZLQJ#SDJHV1
7H V W #&LUFXLW#4 =#7<3,&$/#&+$5$&7(5,67,&6#+4,0+:,
7H V W #&LUFXLW#5 =#7<3,&$/#&+$5$&7(5,67,&6#+<,0+44,
7H V W #&LUFXLW#6 =#7<3,&$/#&+$5$&7(5,67,&6#+;,/#+45,0+49,
RN5RK××1A/××1B/××2A
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
Osilloscope
C
L
Osilloscope
EXT
100Ω
GND
V
OUT
CE
Test Circuit 3 Test Circuit 4
&RPSRQHQWV#,QGXFWRU +/, =#5:—+#+6XPLGD#(OHFWULF#&R1/#/WG>#&'0437,
'LRGH +6%',=#5%444&#+52+0#&R1/#/WG>#6FKRWWN\#7\ S H ,
&DSDFLWRU +&/, =#7:—)×5+7DQWDOXPH#7\ S H ,
7UDQVLVWRU +7U ,=#56'495;*
%DVH#5HVLVWRU +5E, =#633Ω%DVH#&DSDFLWRU#+&E,=#3134—)
8VLQJ#WKHVH#WHVW#FLUFXLWV#FKDUDFWHULVWLFV#GDWD#KDV#EHHQ#REWDLQHG#DV#VKRZQ#RQ#WKH#IROORZLQJ#SDJHV1
7H V W #&LUFXLW#4 =#7<3,&$/#&+$5$&7(5,67,&6#+4,0+8,
7H V W #&LUFXLW#5 =#7<3,&$/#&+$5$&7(5,67,&6#+;,0+43,
7H V W #&LUFXLW#6 =#7<3,&$/#&+$5$&7(5,67,&6#+44,0+47,
7H V W #&LUFXLW#7 =#7<3,&$/#&+$5$&7(5,67,&6#+9,/#+:,
RN5RK××1A/××1B/××2A
11
TYPICAL CHARACTERISTICS
• RN5RK××
××××
××1A/B
1) Output Voltage vs. Output Current (Topt=25°C)
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 16014080 100 120
L=100µH
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 16014080 100 120
L=220µH
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 IOUT(mA)
Output Voltage V
OUT
(V)
0 102030 5040
L=100µH
1.5V
2.0V
1.3V
VIN=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 5040
L=220µH
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=100µH
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=220µH
1.5V 2.0V 3.0V
4.0V
V
IN
=0.9V
RN5RK××1A/××1B/××2A
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=100µH
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=220µH
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 η(%)
0 204060 16014080 100 120
L=100µH
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 η(%)
0 204060 16014080 100 120
L=220µH
1.0V 2.0V
V
IN
=0.9V1.3V
1.5V
RN5RK301B RN5RK301B
100
90
80
70
60
50
40
Output Current I
OUT
(mA)
Efficiency η(%)
0 102030 5040
L=100µH
1.5V 2.0V
1.3V
V
IN
=1.0V
100
90
80
70
60
50
Output Current I
OUT
(mA)
Efficiency η(%)
0 102030 5040
L=220µH
2.0V1.5V1.3V
V
IN
=1.0V
RN5RK××1A/××1B/××2A
13
RN5RK501A RN5RK501A
100
90
80
70
60
50
40
Output Current I
OUT
(mA)
Efficiency η(%)
0 50 100 150 200
L=100µH
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 η(%)
0 50 100 150 200
L=220µH
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 η(%)
0 50 100 150 200
L=100µH
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 η(%)
0 50 100 150 200
L=220µH
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 204060 16014080 100 120
L=100 µH
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)
04020 8060 100 160140120
L=220µH
2.0V
V
IN
=0.9V
1.0V
1.3V 1.5V
RN5RK××1A/××1B/××2A
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 5040
L=100µH
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 5040
L=220µH
2.0V
1.3V1.0V
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=100µH
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=220µH
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=100µH
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=220µH
4.0V
3.0V
2.5V
V
IN
=1.5V
RN5RK××1A/××1B/××2A
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)
015105
L=100µH
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)
015105
L=100µH
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)
015105
L=100µH
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)
015105
L=100µH
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 1007502550
V
IN
=1.5V,L=100µH
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 1007502550
VIN=3.0V,L=100µH
IOUT=30mA
IOUT=0mA
IOUT=10mA
RN5RK××1A/××1B/××2A
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 1007502550
L=100 µH
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
Start-up Voltage Vstart(V)
-50 -25 1007502550
L=100µH
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 1007502550
L=100µH1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
Hold-on Voltage Vhold(V)
-50 -25 1007502550
L=100µH
8) Lx Switching Current vs. Temperature
RN5RK301A RN5RK501A
500
400
300
200
0
100
Temperature Topt( )
LxSwitching Current ILx(mA)
-50 -25 1007502550
500
400
300
200
0
100
Temperature Topt( )
LxSwitching Current ILx(mA)
-50 -25 1007502550
RN5RK××1A/××1B/××2A
17
9) Supply Current 1 vs. Temperature
RN5RK301A RN5RK501A
50
40
30
20
10
Temperature Topt( )
Supply Current1 I
DD1
(µA)
-50 -25 1007502550
80
70
60
50
30
40
Temperature Topt( )
Supply Current1 I
DD1
(µA)
-50 -25 1007502550
10) Supply Current 2 vs. Temperature 11) Standby Current 3 vs. Temperature
RN5RK301A RN5RK301A
5
4
3
2
0
1
Temperature Topt( )
Supply Current2 I
DD2
(µA)
-50 -25 1007502550
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
Supply Current3 Istandby(µA)
-50 -25 1007502550
12) Oscillator Duty Cycle vs. Temperature
RN5RK301A RN5RK301B
85
80
75
70
Temperature Topt( )
Oscullator Duty Cycle Maxduty(%)
-50 -25 1007502550
60
58
56
54
50
52
Temperature Topt( )
Oscullator Duty Cycle Maxduty(%)
-50 -25 1007502550
RN5RK××1A/××1B/××2A
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 1007502550
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
CE L Input Voltage V
CEL
(V)
-50 -25 1007502550
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 1007502550
0.8
0.7
0.6
0.5
0.4
Temperature Topt( )
V
Lx
Voltage Limit V
Lx
(V)
-50 -25 1007502550
RN5RK××1A/××1B/××2A
19
• RN5RK××
××××
××2A
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=27µH
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=27µH
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 η(%)
0 200 400 600 800
L=27µH
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 η(%)
0 200 400 600 800
L=27µH
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=27µH
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=27µH
3.0V
2.0V
1.5V
V
IN
=1.0V
RN5RK××1A/××1B/××2A
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 20015010050
L=27µH
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 20015010050
L=27µH
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 1007502550
V
IN
=1.2V,L=27µH
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 1007502550
V
IN
=3.0V,L=27µH
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 1007502550
10
9
8
7
6
5
4
0
3
2
1
Temperature Topt( )
EXT H Output Current I
EXTH
(mA)
-50 -25 1007502550
RN5RK××1A/××1B/××2A
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 1007502550
20
18
16
14
12
10
8
0
6
4
2
Temperature Topt( )
EXT L Output Current I
EXTL
(mA)
-50 -25 1007502550
8) Supply Current 1 vs. Temperature
RN5RK302A RN5RK502A
50
40
30
20
0
10
Temperature Topt( )
Supply Current1 I
DD1
(µA)
-50 -25 1007502550
50
40
30
20
0
10
Temperature Topt( )
Supply Current1 I
DD1
(µA)
-50 -25 1007502550
9) Supply Current 2 vs. Temperature 10) Standby Current vs. Temperature
RN5RK302A RN5RK302A
5
4
3
2
0
1
Temperature Topt( )
Supply Current2 I
DD2
(µA)
-50 -25 1007502550
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
Supply Current3 Istandby(µA)
-50 -25 1007502550
RN5RK××1A/××1B/××2A
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 1007502550
120
110
100
90
80
70
60
50
Temperature Topt( )
Maximum Oscillator Frequency
f
OSC
(kHz)
-50 -25 1007502550
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 1007502550
1
0.8
0.6
0.4
0
0.2
Temperature Topt( )
CE L Input Voltage V
CEL
(V)
-50 -25 1007502550
