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5185)#6(5,(6
$33/,&$7,21#0$18$/
NO. EA-043-0006
LOW RIPPLE VOLTAGE REGULATOR
WITH EXTERNAL TRANSISTOR
5185)#6(5,(6
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$1##,Q#DGGLWLRQ#WR#ORZ#VXSSO\#FXUUHQW#E\#&026#SURFHVV/#FKLS HQDEOH#IXQFWLRQ#FDQ#EH#XVHG#WR#FRQVHUYH#EDWWHU\#OLIH#GXULQJ#VWDQGE\1
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FEATURES
∙8OWUD#/RZ#6XSSO\#&XUUHQW 11111111111111111111111111111111111111111117<31#63—$
∙6WDQGE\#0RGH1111111111111111111111111111111111111111111111111111111111111117<31#314—$
∙+LJK#$FFXUDF\#2XWSXW#9ROWDJH 111111111111111111111111111111111111“513(
∙ |
+LJK#5LSSOH#5HMHFWLRQ 111111111111111111111111111111111111111111111111117<31#93G%2I 4N+] |
∙ |
/RZ#'URSRXW#9ROWDJH 1111111111111111111111111111111111111111111111111117<31#31492,287 433P$/#GHSHQGHQW#RQ#([WHUQDO#7U1 |
∙/RZ#7HPSHUDWXUH#'ULIW 1111111111111111111111111111111111111111111111117<31#“433SSP2ƒ&
∙+LJK#/LQH#5HJXODWLRQ 1111111111111111111111111111111111111111111111111117<31#3138(29
∙2XWSXW#9ROWDJH111111111111111111111111111111111111111111111111111111111111116WHSZLVH# VHWWLQJ# ZLWK# D# VWHS# RI# 3149# LQ# WKH# UDQJH# RI# 41;9# WR
9139
∙ &XUUHQW#/LPLW#IRU#H[WHUQDO#7U 111111111111111111111111111111111111117<31#;P$/#/LPLW#D#EDVH#FXUUHQW
APPLICATIONS
∙3RZHU#VRXUFH#IRU#EDWWHU\0SRZHUHG#HTXLSPHQW
∙7HOHFRPPXQLFDWLRQV/#&DPHUDV/#9&5V
∙3RZHU#VRXUFH#IRU#GRPHVWLF#DSSOLDQFHV
1
RN5RF
BLOCK DIAGRAM
RN5RF××A
VDD 2
-
+
4 |
EXT |
VOUT
3
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Vref |
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Current Limit |
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CE |
5 |
1 |
GND |
VDD 2
RN5RF××B
-
4 |
EXT |
VOUT
3
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+ |
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Vref |
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Current Limit |
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CE |
5 |
1 |
GND |
SELECTION GUIDE
7KH#RXWSXW#YROWDJH/#WKH#FKLS#HQDEOH#DFWLYH#W\SH/#WKH#SDFNLQJ#W\SH#DQG#WKH#WDSLQJ#W\SH#IRU#WKH#,&V#FDQ#EH#VHOHFWHG#DW WKH#XVHU*V#UHTXHVW1
7KH#VHOHFWLRQ#FDQ#EH#PDGH#E\#GHVLJQDWLQJ#WKH#SDUW#QXPEHU#DV#VKRZQ#EHORZ= 5185)#×××ײ××←3DUW#1XPEHU
− −− −
D EF |
G |
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Code |
Contents |
D
6HWWLQJ#2XWSXW#9ROWDJH#+9287,#= 6WHSZLVH#VHWWLQJ#ZLWK#D#VWHS#RI#3149#LQ#WKH#UDQJH#RI#41;9#WR#9139#LV#SRVVLEOH1
'HVLJQDWLRQ#RI#&KLS#HQDEOH#$FWLYH#7\SH
E$=#´/µ#DFWLYH#W\SH %=#´+µ#DFWLYH#W\SH
'HVLJQDWLRQ#RI#3DFNLQJ#W\SH
F$=#7DSLQJ &=#$QWLVWDWLF#EDJ#RQO\#IRU#VDPSOHV
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2
RN5RF
PIN CONFIGURATION
SOT-23-5
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5 |
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4 |
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CE/CE |
EXT |
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(mark side) |
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GND VDD |
VOUT |
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1 |
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PIN DESCRIPTION |
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Pin No. |
Symbol |
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Pin Description |
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4 |
*1' |
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*URXQG#3LQ |
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5 |
9'' |
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,QSXW#3LQ |
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6 |
9287 |
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2XWSXW#3LQ |
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7 |
(;7 |
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([WHUQDO#7UDQVLVWRU#'ULYH#3LQ#+&026#2XWSXW, |
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8 |
&(#RU#&( |
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&KLS#(QDEOH#3LQ |
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ABSOLUTE MAXIMUM RATINGS
Symbol |
Item |
Rating |
Unit |
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9,1 |
,QSXW#9ROWDJH |
45 |
9 |
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9&( |
,QSXW#9ROWDJH#IRU#&(2&(#3LQ |
0316#WR#9,1#.316 |
9 |
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9(;7 |
(;7#2XWSXW#9ROWDJH |
45 |
9 |
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,(;7 |
(;7#2XWSXW#&XUUHQW |
83 |
P$ |
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3' |
3RZHU#'LVVLSDWLRQ |
483 |
P: |
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7RSW |
2SHUDWLQJ#7HPSHUDWXUH#5DQJH |
073#WR#.;8 |
ƒ& |
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7VWJ |
6WRUDJH#7HPSHUDWXUH#5DQJH |
088#WR#.458 |
ƒ& |
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ABSOLUTE MAXIMUM RATINGS
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