RICOH RN5RF18AA-TL, RN5RF18AA-TR, RN5RF18AC, RN5RF18BA-TL, RN5RF18BA-TR Datasheet
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NO. EA-043-0006
/2:#5,33/(#92/7 $*(
5(*8/$725#:,7+#(;7(51$/
75$16,6725
5185)#6(5,(6
$33/,&$7,21#0$18$/
LOW RIPPLE VOLTAGE REGULATOR
WITH EXTERNAL TRANSISTOR
5185)#6(5,(6
1
OUTLINE
7KH#5185)#6HULHV#DUH#YROWDJH# UHJXODWRU#,&V# ZKLFK#FRQWURO#H[WHUQDO# GULYHU#WUDQVLVWRUV#ZLWK# KLJK# ULSSOH#UHMHFWLRQ/
KLJK#DFFX0UDF\#RXWSXW#YROWDJH/#ORZ#VXSSO\#FXUUHQW#E\#&026#SURFHVV1##(DFK#RI#WKHVH#YROWDJH#UHJXODWRU#,&V#FRQVLVWV#RI#D
YROWDJH#UHIHU0HQFH#XQLW/#DQ#HUURU#DPSOLILHU/#RXWSXW#YROWDJH#VHWWLQJ#UHVLVWRU/#VKRUW#FLUFXLW#FXUUHQW#OLPLWLQJ#FLUFXLW#DQG#FKLS
HQDEOH#FLUFXLW1#7KHVH#,&V#DUH#VXLWDEOH#IRU#FRQVWUXFWLQJ#UHJXODWRUV#ZLWK#XOWUD#ORZ#GURSRXW#YROWDJH#DQG#DQ#RXWSXW#FXUUHQW
LQ#WKH#UDQJH#RI#VHYHUDO#WHQV#RI#P$#DQG#VHYHUDO#KXQGUHGV#P$1##,Q#DGGLWLRQ#WR#ORZ#VXSSO\#FXUUHQW#E\#&026#SURFHVV/#FKLS
HQDEOH#IXQFWLRQ#FDQ#EH#XVHG#WR#FRQVHUYH#EDWWHU\#OLIH#GXULQJ#VWDQGE\1
)XUWKHUPRUH/#D#VXSUHPH# ULSSOH#UHMHFWLRQ#DQG#D# WUDQVLHQW# UHVSRQVH#DUH#VXLWHG# IRU# SRUWDEOH# FRPPXQLFDWLRU#VXFK#DV
FHOO#SKRQHV/#3'$V/#ZDON\#WDONLHV1##6275608#+0LQL#0ROG,#SDFNDJH#LV#DYDLODEOH1
FEATURES
• 8OWUD#/RZ#6XSSO\#&XUUHQW 11111111111111111111111111111111111111111117<31#63—$
• 6WDQGE\#0RGH 1111111111111111111111111111111111111111111111111111111111111117<31#314—$
• +LJK#$FFXUDF\#2XWSXW#9R O W D J H 111111111111111111111111111111111111“513(
• +LJK#5LSSOH#5HMHFWLRQ 111111111111111111111111111111111111111111111111117<31#93G%2I 4N+]
• /RZ#'URSRXW#9R O W D J H 1111111111111111111111111111111111111111111111111117<31#31492,
287
433P$/#GHSHQGHQW#RQ#([WHUQDO#7U1
• /RZ#7HPSHUDWXUH#'ULIW 1111111111111111111111111111111111111111111111117<31#“433SSP2ƒ&
• +LJK#/LQH#5HJXODWLRQ 1111111111111111111111111111111111111111111111111117<31#3138(29
• 2XWSXW#9R O W D J H 111111111111111111111111111111111111111111111111111111111111116WHSZLVH# VHWWLQJ# ZLWK# D# VWHS# RI# 3149# LQ# WKH# UDQJH# RI# 41;9# WR
9139
• &XUUHQW#/LPLW#IRU#H[WHUQDO#7U 111111111111111111111111111111111111117<31#;P$/#/LPLW#D#EDVH#FXUUHQW
APPLICATIONS
• 3RZHU#VRXUFH#IRU#EDWWHU\0SRZHUHG#HTXLSPHQW
• 7HOHFRPPXQLFDWLRQV/#&DPHUDV/#9&5V
• 3RZHU#VRXUFH#IRU#GRPHVWLF#DSSOLDQFHV
RN5RF
2
BLOCK DIAGRAM
RN5RF
××
××××
××
A RN5RF
××
××××
××
B
2
5
1
V
OUT
GND
V
DD
CE
Vref
3
Current Limit
+
-
4
EXT
2
5
1
V
OUT
GND
V
DD
CE
Vref
3
Current Limit
+
-
4
EXT
SELECTION GUIDE
7KH#RXWSXW#YROWDJH/#WKH#FKLS#HQDEOH#DFWLYH#W\SH/#WKH#SDFNLQJ#W\SH#DQG#WKH#WDSLQJ#W\SH#IRU#WKH#,&V#FDQ#EH#VHOHFWHG#DW
WKH#XVHU*V#UHTXHVW1
7KH#VHOHFWLRQ#FDQ#EH#PDGH#E\#GHVLJQDWLQJ#WKH#SDUW#QXPEHU#DV#VKRZQ#EHORZ=
5185)#×××ײ××
←3DU W#1XPEHU
↑ ↑↑ ↑
DEF G
Code Contents
D
6HWWLQJ#2XWSXW#9R O W D J H #+9
287
,#=
6WHSZLVH#VHWWLQJ#ZLWK#D#VWHS#RI#3149#LQ#WKH#UDQJH#RI#41;9#WR#9139#LV#SRVVLEOH1
E
'HVLJQDWLRQ#RI#&KLS#HQDEOH#$FWLYH#7\S H
$=#´/µ#DFWLYH#W\SH
%=#´+µ#DFWLYH#W\SH
F
'HVLJQDWLRQ#RI#3DFNLQJ#W\SH
$=#7DSLQJ
&=#$QWLVWDWLF#EDJ#RQO\#IRU#VDPSOHV
G
'HVLJQDWLRQ#RI#7DSLQJ#W\SH
([1#75/#7/#+UHIHU#WR#7DSLQJ#6SHFLILFDWLRQV/#75#W\SH#LV#SUHVFULEHG#DV#D#VWDQGDUG1,
RN5RF
3
PIN CONFIGURATION
SOT-23-5
12
3
54
(mark side)
CE/CE
EXT
GND V
DDVOUT
PIN DESCRIPTION
Pin No. Symbol Pin Description
4 *1' *URXQG#3LQ
5 9
''
,QSXW#3LQ
6 9
287
2XWSXW#3LQ
7 (;7 ([WHUQDO#7UDQVLVWRU#'ULYH#3LQ#+&026#2XWSXW,
8 &(#RU#&( &KLS#(QDEOH#3LQ
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
9
,1
,QSXW#9R O W D J H 45 9
9
&(
,QSXW#9R O W D J H #IRU#&(2&(#3LQ 0316#WR#9
,1#
.316 9
9
(;7
(;7#2XWSXW#9R O W D J H 45 9
,
(;7
(;7#2XWSXW#&XUUHQW 83 P$
3
'
3RZHU#'LVVLSDWLRQ 483 P:
7RSW 2SHUDWLQJ#7HPSHUDWXUH#5DQJH 073#WR#.;8 ƒ&
7V W J 6W R U D J H #7HPSHUDWXUH#5DQJH 088#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
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