Document
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5185)#6(5,(6
NO. EA-043-0006
LOW RIPPLE VOLTAGE REGULATOR WITH EXTERNAL TRANSISTOR
5185)#6(5,(6
OUTLINE
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
FEATURES
• 8OWUD#/RZ#6XSSO\#&XUUHQW 11111111111111111111111111111111111111111117<3 1#63—$ • 6WDQGE\#0RGH 1111111111111111111111111111111111111111111111111111111111111117<3 1#314—$ • +LJK#$FFXUDF\#2XWSXW#9ROWDJH 111111111111111111111111111111111111“513( • +LJK#5LSSOH#5HMHFWLRQ 111111111111111111111111111111111111111111111111117<3 1#93G%2I 4N+] • /RZ#'URSRXW#9ROWDJH 1111111111111111111111111111111111111111111111111117<3 1#31492,287 433P$/#GHSHQGHQW#RQ#([WHUQDO#7U1 • /RZ#7HPSHUDWXUH#'ULIW 1111111111111111111111111111111111111111111111117<3 1#“433SSP2ƒ& • +LJK#/LQH#5HJXODWLRQ 1111111111111111111111111111111111111111111111111117<3 1#3138(29 • 2XWSXW#9ROWDJH 111111111111111111111111111111111111111111111111111111111111116WHSZLVH# VHWWLQJ# ZLWK# D# VWHS# RI# 3149# LQ# WKH# UDQJH# RI# 41;9# WR 9139 • &XUUHQW#/LPLW#IRU#H[WHUQDO#7U 111111111111111111111111111111111111117<3 1#;P$/#/LPLW#D#EDVH#FXUUHQW
APPLICATIONS
• 3RZHU#VRXUFH#IRU#EDWWHU\0SRZHUHG#HTXLSPHQW • 7HOHFRPPXQLFDWLRQV/#&DPHUDV/#9&5V • 3RZHU#VRXUFH#IRU#GRPHVWLF#DSSOLDQFHV
1
RN5RF
BLOCK DIAGRAM
RN5RF××A
4
VDD 2 + Vref Current Limit CE 5 Vref Current Limit EXT
RN5RF××B
4 3
VOUT VDD 2 + EXT
3
VOUT
1 GND
CE 5
1 GND
SELECTION GUIDE
7KH#RXWSXW#YROWDJH/#WKH#FKLS#HQDEOH#DFWLYH#W\SH/#WKH#SDFNLQJ#W\SH#DQG# WKH# WDSLQJ# W\SH# IRU# WKH# ,&V# FDQ# EH# VHOHFWHG# DW WKH#XVHU*V#UHTXHVW1 7KH#VHOHFWLRQ#FDQ#EH#PDGH#E\#GHVLJQDWLQJ#WKH#SDUW#QXPEHU#DV#VKRZQ#EHORZ= 5185)#×××ײ××←3DUW#1XPEHU ↑ ↑↑ ↑ D EF G Code D 6HWWLQJ#2XWSXW#9ROWDJH#+9287,#= 6WHSZLVH#VHWWLQJ#ZLWK#D#VWHS#RI#3149#LQ#WKH#UDQJH#RI#41;9#WR#9139#LV#SRVVLEOH1 'HVLJQDWLRQ#RI#&KLS#HQDEOH#$FWLYH#7\SH E $=#´/µ#DFWLYH#W\SH %=#´+µ#DFWLYH#W\SH 'HVLJQDWLRQ#RI#3DFNLQJ#W\SH F $=#7DSLQJ &=#$QWLVWDWLF#EDJ#RQO\#IRU#VDPSOHV G 'HVLJQDWLRQ#RI#7DSLQJ#W\SH ([1#75/#7/#+UHIHU#WR#7DSLQJ#6SHFLILFDWLRQV/#75#W\SH#LV#SUHVFULEHG#DV#D#VWDQGDUG1, Contents
2
RN5RF
PIN CONFIGURATION
SOT-23-5
5 4
CE/CE (mark side) GND VDD
EXT
VOUT
1
2
3
PIN DESCRIPTION
Pin No. 4 5 6 7 8 Symbol *1' 9'' 9287 (;7 &(#RU#&( *URXQG#3LQ ,QSXW#3LQ 2XWSXW#3LQ ([WHUQDO#7UDQVLVWRU#'ULYH#3LQ#+&026#2XWSXW, &KLS#(QDEOH#3LQ Pin Description
ABSOLUTE MAXIMUM RATINGS
Symbol 9,1 9&( 9(;7 ,(;7 3' 7RSW 7VWJ ,QSXW#9ROWDJH ,QSXW#9ROWDJH#IRU#&(2&(#3LQ (;7#2XWSXW#9ROWDJH (;7#2XWSXW#&XUUHQW 3RZHU#'LVVLSDWLRQ 2SHUDWLQJ#7HPSHUDWXUH#5DQJH 6WRUDJH#7HPSHUDWXUH#5DQJH Item Rating 45 0316#WR#9,1#.316 45 83 483 073#WR#.;8 088#WR#.458 Unit 9 9 9 P$ P: ƒ& ƒ&
ABSOLUTE MAXIMUM RATINGS $EVROXWH#0D[LPXP#UDWLQJV#DUH#WKUHVKROG#OLPLW#YDOXHV#WKDW#PXVW#QRW#EH#H[FHHGHG#HYHQ#IRU#DQ#LQVWDQW#XQGHU#DQ\#FRQ0 GLWLRQV1#0RUHRYHU/#VXFK#YDOXHV#IRU#DQ\#WZR#LWHPV#PXVW#QRW#EH#UHDFKHG#VLPXOWDQHRXVO\1#2SHUDWLRQ#DERYH#WKHVH#DEVR0 OXWH#PD[LPXP#UDWLQJV#PD\#FDXVH#GHJUDGDWLRQ#RU#SHUPDQHQW#GDPDJH#WR#WKH#GHYLFH1#7KHVH#DUH#VWUHVV#UDWLQJV#RQO\#DQG GR#QRW#QHFHVVDULO\#LPSO\#IXQFWLRQDO#RSHUDWLRQ#EHORZ#WKHVH#OLPLWV1
3
RN5RF
ELECTRICAL CHARACTERISTICS
7RSW 58ƒ& Symbol 9287 ,287 ,(;7 ∆92872∆,287 9',) ,66 ,VWDQGE\ ,(;7OHDN ∆92872∆9,1 55 9,1 9(;7 ∆92872∆7RSW 538 9&(+ 9&(/ *1) *) Item 2XWSXW#9ROWDJH 2XWSXW#&XUUHQW (;7#&XUUHQW /RDG#5HJXODWLRQ 'URSRXW#9ROWDJH 6XSSO\#&XUUHQW 6WDQGE\#&XUUHQW (;7#/HDNDJH#&XUUHQW /LQH#5HJXODWLRQ 5LSSOH#5HMHFWLRQ ,QSXW#9ROWDJH (;7#2XWSXW#9ROWDJH 2XWSXW#9ROWDJH#7HPSHUDWXUH &RHIILFLHQW 3XOO#XS#UHVLVWDQFH#IRU#&(#SLQ &(#,QSXW#9ROWDJH#´+µ &(#,QSXW#9ROWDJH#´/ µ 418 3 ,287 43P$ 073ƒ&≤7RSW≤;8ƒ& “433 7 9,1 3158 ,287 83P$ 9287.3189≤9,1≤439 I 4N+]/#VLQXVRLGDO#3189S0S 9,109287 4139 3 3138 93 43 43 Conditions
9,109287 4139
MIN.
9287
TYP.
MAX.
9287
Unit 9 $
,287 83P$ 9,109287 4139 9,1 7139 /#9(;7 5139 9,109287 4139 4P$≤,287≤433P$ ,287 433P$/#,287 3P$ 9,109287 4139 9,1 43139
×31<; 413-4 8 093 314 63 3134 314 ;
×4135
48 93 315 83 413 318 3163
P$ P9 9 —$ —$ —$ (29 G% 9 9 SSP2ƒ& 0Ω 9 9
The output current depends on the performance of external PNP transistor. Use External PNP transistor of a low saturation type, with an hFE between 100 and 300.