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SOT-23-5 VFM STEP-UP DC/DC CONVERTER
515.[[ [[$[[ [[%[[ [[$ 6(5,(6 [[ [[ [[
NO. EA-045-0204
OUTLINE
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
FEATURES
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APPLICATIONS
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1
RN5RKXX1A/xx1B/xx2A
BLOCK DIAGRAM
Lx* Vref VOUT
5
VLX Limiter Buffer
2 -
VFM Control
+
5
EXT*
OSC 100kHz Chip Enable
4 1
GND CE
*)
LX pin: only for RN5RKxx$xx%
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 UH TXHVW 7KH VHOHFWLRQ FDQ EH PDGH E\ GHVLJQDWLQJ WKH SDUW QXPEHU DV VKRZQ EHORZ 515. [[[[[[ 3DUW 1XPEHU D EF G Code D 6HWWLQJ 2XWSXW 9ROWDJH 9287 6WHSZLVH VHWWLQJ ZLWK D VWHS RI 9 LQ WKH UDQJH RI 9 WR 9 LV SRVVLEOH 'HVLJQDWLRQ RI 'ULYHU E ,QWHUQDO /[ 7U 'ULYHU ([WHUQDO 7U 'ULYHU 'HVLJQDWLRQ RI 'XW\ &\FOH F $ % G 'HVLJQDWLRQ RI 7DSLQJ W\SH ([ 75 7/ UHIHU WR 7DSLQJ 6SHFLILFDWLRQV 75 W\SH LV SUHVFULEHG DV D VWDQGDUG Contents
2
RN5RKXX1A/xx1B/xx2A
PIN CONFIGURATION
SOT-23-5
5 4
(mark side)
1
2
3
PIN DESCRIPTION
Pin No. Symbol &( 9287 1& *1' /; &KLS (QDEOH 3LQ 6WHSXS 2XWSXW 0RQLWRULQJ 3LQ 3RZHU 6XSSO\ IRU GHYLFH LWVHOI 1R &RQQHFWLRQ *URXQG 3LQ 6ZLWFKLQJ 3LQ 1FK 2SHQ 'UDLQ Pin description
Pin No.
Symbol &( 9287 1& *1' (;7 &KLS (QDEOH 3LQ
Pin description
6WHSXS 2XWSXW 0RQLWRULQJ 3LQ 3RZHU 6XSSO\ IRU GHYLFH LWVHOI 1R &RQQHFWLRQ *URXQG 3LQ ([WHUQDO 7U 'ULYH 3LQ &026 2XWSXW
3
RN5RKXX1A/xx1B/xx2A
ABSOLUTE MAXIMUM RATINGS
Symbol 9287 9/; 9(;7 9&( ,/; ,(;7 3' 7RSW 7VWJ Item 6WHSXS 2XWSXW 3LQ 9ROWDJH /; 3LQ 9ROWDJH (;7 3LQ 9ROWDJH &( 3LQ 9ROWDJH /[ 3LQ 2XWSXW &XUUHQW (;7 3LQ 2XWSXW &XUUHQW 3RZHU 'LVVLSDWLRQ 2SHUDWLQJ 7HPSHUDWXUH 5DQJH 6WRUDJH 7HPSHUDWXUH 5DQJH Rating WR 9287 WR 9287 WR WR Unit 9 9 9 9 P$ P$ P: & &
ABSOLUTE MAXIMUM RATINGS $EVROXWH 0D[LPXP UDWLQJV DUH WKUHVKROG OLPLW YDOXHV WKDW PXVW QRW EH H[FHHGHG HYHQ IRU DQ LQVWDQW XQGHU DQ\ FRQ GLWLRQV 0RUHRYHU VXFK YDOXHV IRU DQ\ WZR LWHPV PXVW QRW EH UHDFKHG VLPXOWDQHRXVO\ 2SHUDWLRQ DERYH WKHVH DEVR OXWH PD[LPXP UDWLQJV PD\ FDXVH GHJUDGDWLRQ RU SHUPDQHQW GDPDJH WR WKH GHYLFH 7KHVH DUH VWUHVV UDWLQJV RQO\ DQG GR QRW QHFHVVDULO\ LPSO\ IXQFWLRQDO RSHUDWLRQ EHORZ WKHVH OLPLWV
4
RN5RKXX1A/xx1B/xx2A
ELECTRICAL CHARACTERISTICS
*
RN5RKXX1A/xx1B Symbol 9287 9,1 92877RSW 9VWDUW Item 2XWSXW 9ROWDJH ,QSXW 9ROWDJH 2XWSXW 9ROWDJH 7HPSHUDWXUH &RHIILFLHQW 6WDUW8S 9ROWDJH 6WDUW8S 9ROWDJH 7HPSHUD WXUH &RHIILFLHQW +ROGRQ 9ROWDJH [[$ +ROGRQ 9ROWDJH [[% 6XSSO\ &XUUHQW 6WDQGE\ &XUUHQW /[ /HDNDJH &XUUHQW 0D[LPXP 2VFLOODWRU )UH TXHQF\ )UHTXHQF\ 7HPSHUDWXUH &R HIILFLHQW 2VFLOODWRU 'XW\ &\FOH [[$ 2VFLOODWRU 'XW\ &\FOH [[% 9/[ 9ROWDJH /LPLW &7RSW& 9,1 99 &7RSW& 9,1 99 9,1 99 9,1 99 9287 9&( VHW 9287 9 9287 9 9&( 9 9287 9/; 9 9287 9&( VHW 9287x &7RSW& 9287 9&( VHW 9287x 21 9/; / VLGH 9287 9&( VHW 9287x 21 9/; / VLGH 9287 9&( 9 /[ 6ZLWFK 21 9287 9&( VHW 9287x 9&(+ &( + ,QSXW 9ROWDJH -XGJPHQW LV PDGH E\ WKH /[ ZDYHIRUP 9287 9&( VHW 9287x 9&(/ ,&(+ ,&(/ ,'' ,'' &( / ,QSXW 9ROWDJH &( + ,QSXW &XUUHQW &( / ,QSXW &XUUHQW 6XSSO\ &XUUHQW 6XSSO\ &XUUHQW

7RSW & Conditions 9,1 VHW 9287x ,287 P$ Min. x Typ. Max. x 9 Unit 9 9 SSP& 9 P9& 9 9 $ $ $ N+] N+] &
9VWDUW7RSW 9KROG 9KROG ,'' ,VWDQE\ ,/;OHDN
1RVF
1RVFTopt 'XW\ 'XW\ 9O[OLP
9
-XGJPHQW LV PDGH E\ WKH /[ ZDYHIRUP 9287 9 9&( 9 9287 9 9&( 9 992879 992879

9 $ $ $ $
5
RN5RKXX1A/xx1B/xx2A
Symbol ,'' ,''
,'' ,'' ,''
Item 6XSSO\ &XUUHQW 6XSSO\ &XUUHQW 6XSSO\ &XUUHQW 6XSSO\ &XUUHQW 6XSSO\ &XUUHQW

Conditions 992879 992879 992879 992879 992879 992879 9/; 9 992879 9/; 9 992879 9/; 9 992879 9/; 9 992879 9/; 9 992879 9/; 9 992879 9/; 9
Min.
Typ.
Max.
Unit $ $ $ $ $ P$ P$ P$ P$ P$ P$ P$
,/; ,/; ,/; ,/; ,/; ,/; ,/; *1) *2)
/[ 6ZLWFKLQJ &XUUHQW /[ 6ZLWFKLQJ &XUUHQW /[ 6ZLWFKLQJ &XUUHQW /[ 6ZLWFKLQJ &XUUHQW /[ 6ZLWFKLQJ &XUUHQW /[ 6ZLWFKLQJ &XUUHQW /[ 6ZLWFKLQJ &XUUHQW

Condition: An Output load resistor RL is connected between VOUT and GND. Note that the resistor RL has a resistance which makes an output current 1mA after step-up operation. 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 x0.96
6
RN5RKXX1A/xx1B/xx2A
* RN5RKxx2A 7RSW & Symbol 9287 9,1 VOUTTopt 9VWDUW Vstart/Topt ,'' ,VWDQE\
RVF
Item 2XWSXW 9ROWDJH ,QSXW 9ROWDJH Output Voltage Temperature Coefficient 6WDUW8S 9ROWDJH Start-Up Voltage Temperature Coefficient 6XSSO\ &XUUHQW 6WDQGE\ &XUUHQW 0D[LPXP 2VFLOODWRU )UH TXHQF\ )UHTXHQF\ 7HPSHUDWXUH &R HIILFLHQW 2VFLOODWRU 'XW\ &\FOH
Conditions 9,1 VHW 9287x ,287 P$
Min. x
Typ.
Max. x
Unit 9 9 SSP&
&7RSW& 9,1 99 -40CTopt85C VIN=0V2V

9 P9& $ $ N+] N+]&
9287 9&( VHW 9287 9 9287 9 9&( 9 9287 9&( VHW 9287x &7RSW& 9287 9&( VHW 9287x 21 9(;7 + VLGH 9287 9&( VHW 9287x -XGJPHQW LV PDGH E\ WKH (;7 ZDYHIRUP 9287 9&( VHW 9287x
1RVFTopt 'XW\
9&(+
&( + ,QSXW 9ROWDJH
9
9&(/ ,&(+ ,&(/ ,'' ,'' ,'' ,'' ,(;7+ ,(;7+
&( / ,QSXW 9ROWDJH &( + ,QSXW &XUUHQW &( / ,QSXW &XUUHQW 6XSSO\ &XUUHQW 6XSSO\ &XUUHQW 6XSSO\ &XUUHQW 6XSSO\ &XUUHQW (;7 + 2XWSXW 9ROWDJH (;7 + 2XWSXW 9ROWDJH
-XGJPHQW LV PDGH E\ WKH (;7 ZDYHIRUP 9287 9 9&( 9 9287 9 9&( 9 992879 (;7 QR ORDG 992879 (;7 QR ORDG 992879 (;7 QR ORDG 992879 (;7 QR ORDG 992879 9(;7 92879 992879 9(;7 92879

9 $ $ $ $ $ $ P$ P$
7
RN5RKXX1A/xx1B/xx2A
Symbol ,(;7+ ,(;7+ ,(;7+ ,(;7+ *1) *2)
Item (;7 + 2XWSXW 9ROWDJH (;7 / 2XWSXW 9ROWDJH (;7 / 2XWSXW 9ROWDJH (;7 / 2XWSXW 9ROWDJH
Conditions 992879 9(;7 92879 992879 9(;7 9 992879 9(;7 9 992879 9(;7 9
Min.
Typ.
Max.
Unit P$ P$ P$ P$

Condition: An Output load resistor RL is connected between VOUT and GND. Note that the resistor RL has a resistance which makes an output current 1mA after step-up operation. 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 x0.96
8
RN5RKXX1A/xx1B/xx2A
TEST CIRCUITS
SBD
1k
L
Lx
VOUT V RL
Lx
VOUT A
VIN
CL GND CE
GND CE
CL
Test Circuit 1
Test Circuit 2
Lx
VOUT
GND
CE
CL
Oscilloscope
Test Circuit 3 *) When VLXlim and ILX are measured, the 5 resistor is used. Otherwise 1k is used. + + 6XPLGD (OHFWULF &R /WG &' ) 7DQWDOXP 7\SH
&RPSRQHQWV ,QGXFWRU / 'LRGH &DSDFLWRU &/
6%' 0$ 0DWVXVKLWD (OHFWURQLFV &RUSRUDWLRQ 6FKRWWN\ 7\SH
8VLQJ WKHVH WHVW FLUFXLWV FKDUDFWHULVWLFV GDWD KDV EHHQ REWDLQHG DV VKRZQ RQ WKH IROORZLQJ SDJHV 7HVW &LUFXLW 7HVW &LUFXLW 7HVW &LUFXLW 7\SLFDO &KDUDFWHULVWLFV 7\SLFDO &KDUDFWHULVWLFV 7\SLFDO &KDUDFWHULVWLFV
9
RN5RKXX1A/xx1B/xx2A
SBD L Rb EXT VOUT V VIN Cb GND CE CL
GND CE A CL EXT VOUT
Tr
Test Circuit 1
100
Test Circuit 2
EXT
EXT Oscilloscope VOUT
VOUT
GND
GND CE CL
CE
CL
Oscilloscope
Test Circuit 3 &RPSRQHQWV ,QGXFWRU / 'LRGH &DSDFLWRU 7UDQVLVWRU %DVH 5HVLVWRU &/ 7U 5E + 6XPLGD (OHFWULF &R /WG &' )x 7DQWDOXP 7\SH 6'* %DVH &DSDFLWRU &E )
Test Circuit 4
6%' 5%& 5RKP &R /WG 6FKRWWN\ 7\SH
7KH W\SLFDO FKDUDFWHULVWLFV ZHUH REWDLQHG ZLWK XVLQJ WKHVH WHVW FLUFXLWV 7HVW &LUFXLW 7HVW &LUFXLW 7HVW &LUFXLW 7HVW &LUFXLW 7\SLFDO &KDUDFWHULVWLFV 7\SLFDO &KDUDFWHULVWLFV 7\SLFDO &KDUDFWHULVWLFV 7\SLFDO &KDUDFWHULVWLFV
10
RN5RKXX1A/xx1B/xx2A
TYPICAL CHARACTERISTICS
* RN5RKXX1A/B 1) Output Voltage vs. Output Current (Topt=25C) RN5RK301A
3.5 L=100H 3.5
RN5RK301A
L=220H
Output Voltage VOUT(V)
2.0V 2.5 2.0 1.5 1.0 0.5 0.0 0 20 40 60 80 100 120 140 160 VIN=0.9V 1.5V 1.0V 1.3V
Output Voltage VOUT(V)
3.0
3.0 2.5 2.0 VIN=0.9V 1.5 1.0 0.5 0.0 0 20 40 60 80 100 120 140 160 1.3V 1.0V 1.5V 2.0V
Output Current IOUT(mA)
Output Current IOUT(mA)
RN5RK301B
3.5 L=100H 3.5
RN5RK301B
L=220H
Output Voltage VOUT(V)
2.0V 1.3V VIN=1.0V 1.5V
Output Voltage VOUT(V)
3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 10 20 30 40
3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 10 20 30 40 1.3V VIN=1.0V 1.5V
2.0V
50
50
Output Current IOUT(mA)
Output Current IOUT(mA)
RN5RK501A
6 L=100H 4.0V 2.0V 4 VIN=0.9V 3 2 1 0 0 50 100 150 200 1.5V 3.0V
RN5RK501A
6 L=220H 4.0V
Output Voltage VOUT(V)
Output Voltage VOUT(V)
5
5 4 3 2 1 0 0 50 100 150 VIN=0.9V 1.5V 2.0V
3.0V
200
Output Current IOUT(mA)
Output Current IOUT(mA)
11
RN5RKXX1A/xx1B/xx2A
RN5RK501B
6 L=100H 4.0V 6
RN5RK501B
L=220H 4.0V 2.0V 2.5V VIN=1.5V 3.0V
Output Voltage VOUT(V)
4 3 2 1 0 0
2.5V 2.0V VIN=1.5V
3.0V
Output Voltage VOUT(V)
200
5
5 4 3 2 1 0
50
100
150
0
50
100
150
200
Output Current IOUT(mA)
Output Current IOUT(mA)
2)
Efficiency vs. Output Current (Topt=25C) RN5RK301A
100 90 L=100H
RN5RK301A
100 90 L=220H
Efficiency (%)
Efficiency (%)
80 70 2.0V 60 1.0V 50 VIN=0.9V 1.3V 40 0 20 40 60 80 100 120 140 160 1.5V
80 70 60 50 40 0 20 1.0V VIN=0.9V 1.3V 60 80 100 120 140 160 1.5V
2.0V
40
Output Current IOUT(mA)
Output Current IOUT(mA)
RN5RK301B
100 90 L=100H 100 90 1.3V 1.5V VIN=1.0V 2.0V
RN5RK301B
L=220H
Efficiency (%)
80 70 60 50 40 0 10 20 30 40 50
Efficiency (%)
80 1.3V 70 VIN=1.0V 60 50 0 10 20 30 40 50 1.5V 2.0V
Output Current IOUT(mA)
Output Current IOUT(mA)
12
RN5RKXX1A/xx1B/xx2A
RN5RK501A
100 90 L=100H 100 90
RN5RK501A
L=220H
4.0V
Efficiency (%)
80 2.0V 70 VIN=0.9V 60 50 40 0 50 100 150 1.5V
Efficiency (%)
4.0V 3.0V
80 70 60 50 2.0V 40 1.5V VIN=0.9V 3.0V
200
0
50
100
150
200
Output Current IOUT(mA)
Output Current IOUT(mA)
RN5RK501B
100 90 L=100H 4.0V 100 90
RN5RK501B
L=220H
Efficiency (%)
80 70
Efficiency (%)
2.0V 2.5V 3.0V VIN=1.5V
80 70 60 50 40
2.0V 2.5V VIN=1.5V
4.0V 3.0V
60 50 40 0 50 100 150 200
0
50
100
150
200
Output Current IOUT(mA)
Output Current IOUT(mA)
3)
Ripple Voltage vs. Output Current (Topt=25C) RN5RK301A
140 1.5V L=100 H 160
RN5RK301A
L=220H
Ripple Voltage Vr(mVp-p)
Ripple Voltage Vr(mVp-p)
120 100 80 60 40 20 0 0 20 40 60 80 100 120 140 160 1.0V VIN=0.9V 1.3V
140 120 100 80 60 40 20 VIN=0.9V 0 0 20 40 60 80 100 120 140 160 1.0V 1.3V 1.5V 2.0V
2.0V
Output Current IOUT(mA)
Output Current IOUT(mA)
13
RN5RKXX1A/xx1B/xx2A
RN5RK301B
45 L=100H 2.0V 45 40 35 30 25 20 15 10 5 0 0 10 20 30 40 50 VIN=1.0V 1.3V 1.5V 40 35 30 25 20 15 10 5 0 0
RN5RK301B
L=220H
Ripple Voltage Vr(mVp-p)
Ripple Voltage Vr(mVp-p)
2.0V
1.0V 1.3V 1.5V
10
20
30
40
50
Output Current IOUT(mA)
Output Current IOUT(mA)
RN5RK501A
200 L=100H 200
RN5RK501A
L=220H
Ripple Voltage Vr(mVp-p)
150
Ripple Voltage Vr(mVp-p)
3.0V
150 2.0V 100
3.0V 4.0V
100 2.0V 50 1.5V VIN=0.9V 0 0 50 100 150
4.0V
50 1.5V VIN=0.9V 0
200
0
50
100
150
200
Output Current IOUT(mA)
Output Current IOUT(mA)
RN5RK501B
140 L=100H 3.0V 140
RN5RK501B
L=220H
Ripple Voltage Vr(mVp-p)
100 80 60 40 20 VIN=1.5V 0 0 50 100 150 200 2.0V 2.5V 4.0V
Ripple Voltage Vr(mVp-p)
120
120 100 3.0V 80 60 40 2.5V 20 VIN=1.5V 0 0 50 100 150 200 4.0V
Output Current IOUT(mA)
Output Current IOUT(mA)
14
RN5RKXX1A/xx1B/xx2A
4)
Start-up/Hold-on Voltage vs. Output Current (Topt=25C) RN5RK301A
1.4 L=100H
1.4
RN5RK501A
L=100H
Start-up/Hold-on Voltage Vstart/Vhold(V)
1.0 0.8 0.6 0.4
Start-up/Hold-on Voltage Vstart/Vhold(V)
1.2 Vstart
1.2 1.0 0.8 0.6 Vhold 0.4 0.2 0.0 0 5 10 15 Vstart
Vhold 0.2 0.0 0 5 10 15
Output Current IOUT(mA)
Output Current IOUT(mA)
RN5RK301B
2.0 1.8 L=100H
2.0 1.8
RN5RK501B
L=100H
Start-up/Hold-on Voltage Vstart/Vhold(V)
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 5 10 15 Vhold Vstart
Start-up/Hold-on Voltage Vstart/Vhold(V)
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 5 10 15 Vhold Vstart
Output Current IOUT(mA)
Output Current IOUT(mA)
5)
Output Voltage vs. Temperature RN5RK301A
3.10 VIN=1.5V,L=100H
RN5RK501A
5.10 VIN=3.0V,L=100H
Output Voltage VOUT(V)
Output Voltage VOUT(V)
3.05
5.05
IOUT=0mA IOUT=10mA
3.00
5.00
IOUT=30mA
2.95 IOUT=30mA 2.90 -50
4.95
IOUT=0mA IOUT=10mA
-25
0
25
50
75
100
4.90 -50
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
15
RN5RKXX1A/xx1B/xx2A
6)
Start-up Voltage vs. Temperature RN5RK501A
1 L=100 H
RN5RK501B
1 L=100H
Start-up Voltage Vstart(V)
-25 0 25 50 75 100
Start-up Voltage Vstart(V)
0.8 0.6 0.4 0.2 0 -50
0.8 0.6 0.4 0.2 0 -50
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
7)
Hold-on Voltage vs. Temperature RN5RK501A
1 L=100H 1
RN5RK501B
L=100H
Hold-on Voltage Vhold(V)
0.8 0.6 0.4 0.2 0 -50
Hold-on Voltage Vhold(V)
-25 0 25 50 75 100
0.8 0.6 0.4 0.2 0 -50
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
8)
Lx Switching Current vs. Temperature RN5RK301A
500 500
RN5RK501A
LxSwitching Current ILx(mA)
LxSwitching Current ILx(mA)
400 300 200 100 0 -50
400 300 200 100 0 -50
-25
0
25
50
75
100
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
16
RN5RKXX1A/xx1B/xx2A
9)
Supply Current 1 vs. Temperature RN5RK301A
50 80
RN5RK501A
Supply Current1 IDD1(A)
Supply Current1 IDD1(A)
40
70 60 50 40 30 -50
30
20
10 -50
-25
0
25
50
75
100
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
10) Supply Current 2 vs. Temperature RN5RK301A
5 4 3 2 1 0 -50
11) Standby Current 3 vs. Temperature RN5RK301A
1
Supply Current3 Istandby(A)
-25 0 25 50 75 100
Supply Current2 IDD2(A)
0.8 0.6 0.4 0.2 0 -50
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
12) Oscillator Duty Cycle vs. Temperature RN5RK301A
Oscullator Duty Cycle Maxduty(%) Oscullator Duty Cycle Maxduty(%)
85 60 58 56 54 52 50 -50
RN5RK301B
80
75
70 -50
-25
0
25
50
75
100
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
17
RN5RKXX1A/xx1B/xx2A
13) CE "H" Input Voltage vs. Temperature RN5RK301A
1
14) CE "L" Input Voltage vs. Temperature RN5RK301A
1
CE H Input Voltage VCEH(V)
0.8 0.6 0.4 0.2 0 -50
CE L Input Voltage VCEL(V)
-25 0 25 50 75 100
0.8 0.6 0.4 0.2 0 -50
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
15) Maximum Oscillator Frequency vs. Temperature RN5RK301A
Maximum Oscillator Frequency fOSC(kHz)
120
16) VLX Voltage Limit vs. Temperature RN5RK301A
0.8
VLx Voltage Limit VLx(V)
110 100 90 80 70 60 50 -50 -25 0 25 50 75 100
0.7
0.6
0.5
0.4 -50
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
18
RN5RKXX1A/xx1B/xx2A
* RN5RKxx2A 1) Output Voltage vs. Output Current (Topt=25C) RN5RK302A
3.5 L=27H 6.0
RN5RK502A
L=27H
Output Voltage VOUT(V)
2.0V
Output Voltage VOUT(V)
3.0 2.5 2.0 1.5 1.0 0.5 0 0 200 400 600 VIN=0.9V 1.3V 1.0V 1.5V
5.0 2.0V 4.0 3.0 2.0 1.0 0.0 VIN=1.0V 1.5V 3.0V
800
0
200
400
600
800
Output Current IOUT(mA)
Output Current IOUT(mA)
2)
Efficiency vs. Output Current (Topt=25C) RN5RK302A
100 90 L=27H 100 90
RN5RK502A
L=27H
Efficiency (%)
80 2.0V 70 1.5V 60 VIN=0.9V 50 40 0 200 400 600 800 1.0V 1.3V
Efficiency (%)
80 3.0V 70 VIN=1.0V 60 50 40 30 0 200 400 600 800 1.5V 2.0V
Output Current IOUT(mA)
Output Current IOUT(mA)
3)
Ripple Voltage vs. Output Current (Topt=25C) RN5RK302A
250 L=27H 300 2.0V 1.3V 200 150 100 50 VIN=0.9V 0 0 200 400 600 800 0 0 200 400 600 800 1.0V 1.5V 2.0V
RN5RK502A
L=27H
Ripple Voltage Vr(mVp-p)
Ripple Voltage Vr(mVp-p)
250 200 150 100 50
1.5V
3.0V
VIN=1.0V
Output Current IOUT(mA)
Output Current IOUT(mA)
19
RN5RKXX1A/xx1B/xx2A
4)
Start-up/Hold-on Voltage vs. Output Current (Topt=25C) RN5RK302A
2.0 1.8 L=27H
RN5RK502A
2.4 2.2 2.0 1.8 1.6 1.4 Vstart,Vhold 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 50 L=27H
Start-up/Hold-on Voltage Vstart/Vhold(V)
1.6 1.4 1.2 Vstart 1.0 0.8 0.6 0.4 0.2 0.0 0 50 100 150 200 Vhold
Start-up/Hold-on Voltage Vstart/Vhold(V)
100
150
200
Output Current IOUT(mA)
Output Current IOUT(mA)
5)
Output Voltage vs. Temperature RN5RK302A
3.10 VIN=1.2V,L=27H
5.10
RN5RK502A
VIN=3.0V,L=27H
Output Voltage VOUT(V)
Output Voltage VOUT(V)
3.05 IOUT=0mA 3.00 2.95 IOUT=50mA 2.90 2.85 2.80 -50 IOUT=100mA
5.05
IOUT=0mA
5.00
IOUT=100mA IOUT=50mA
4.95
-25
0
25
50
75
100
4.90 -50
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
6)
EXT "H" Output Current vs. Temperature RN5RK302A
EXT H Output Current IEXTH(mA)
9 8 7 6 5 4 3 2 1 0 -50 -25 0 25 50 75 100
RN5RK502A
EXT H Output Current IEXTH(mA)
10 9 8 7 6 5 4 3 2 1 0 -50 -25 0 25 50 75 100
10
Temperature Topt( )
Temperature Topt( )
20
RN5RKXX1A/xx1B/xx2A
7)
EXT "L" Output Current vs. Temperature RN5RK302A
EXT L Output Current IEXTL(mA)
18 16 14 12 10 8 6 4 2 0 -50 -25 0 25 50 75 100
RN5RK502A
EXT L Output Current IEXTL(mA)
20 18 16 14 12 10 8 6 4 2 0 -50 -25 0 25 50 75 100
20
Temperature Topt( )
Temperature Topt( )
8)
Supply Current 1 vs. Temperature RN5RK302A
50 50
RN5RK502A
Supply Current1 IDD1(A)
Supply Current1 IDD1(A)
40 30 20 10 0 -50
40 30 20 10 0 -50
-25
0
25
50
75
100
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
9)
Supply Current 2 vs. Temperature RN5RK302A
5
10) Standby Current vs. Temperature RN5RK302A
1
Supply Current3 Istandby(A)
Supply Current2 IDD2(A)
4 3 2 1 0 -50
0.8 0.6 0.4 0.2 0 -50
-25
0
25
50
75
100
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
21
RN5RKXX1A/xx1B/xx2A
11) Oscillator Duty Cycle vs. Temperature RN5RK302A
Oscullator Duty Cycle Maxduty(%)
85
12) Maximum Oscillator Frequency vs. Temperature RN5RK302A
120
Maximum Oscillator Frequency
-25 0 25 50 75 100
110 100
fOSC(kHz)
80
90 80 70 60 50 -50 -25 0 25 50 75 100
75
70 -50
Temperature Topt( )
Temperature Topt( )
13) CE "H" Input Voltage vs. Temperature RN5RK302A
1
14) CE "L" Input Voltage vs. Temperature RN5RK302A
1
CE H Input Voltage VCEH(V)
0.8 0.6 0.4 0.2 0 -50
CE L Input Voltage VCEL(V)
-25 0 25 50 75 100
0.8 0.6 0.4 0.2 0 -50
-25
0
25
50
75
100
Temperature Topt( )
Temperature Topt( )
22

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