LOW RIPPLE VOLTAGE REGULATOR
WITH EXTERNAL TRANSISTOR
515) 6(5,(6
NO. EA-043-0204
OUTLINE
7KH 515) 6HULHV DUH &026EDVHG YROWDJH UHJXODWRU ,&V ZKLFK FRQWURO H[WHUQDO GULYHU WUDQVLVWRUV ZLWK KLJK ULS
SOH UHMHFWLRQ KLJK DFFXUDF\ RXWSXW YROWDJH ORZ VXSSO\ FXUUHQW (DFK RI WKHVH YROWDJH UHJXODWRU ,&V FRQVLVWV RI D YROW
DJH UHIHUHQFH XQLW DQ HUURU DPSOLILHU RXWSXW YROWDJH VHWWLQJ UHVLVWRU VKRUW FLUFXLW FXUUHQW OLPLWLQJ FLUFXLW DQG FKLS HQ
DEOH FLUFXLW 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$ ,Q DGGLWLRQ WR ORZ VXSSO\ FXUUHQW E\ &026 SURFHVV FKLS
HQDEOH IXQFWLRQ FDQ EH XVHG WR FRQVHUYH EDWWHU\ OLIH GXULQJ VWDQGE\
)XUWKHUPRUH D VXSUHPH ULSSOH UHMHFWLRQ DQG D WUDQVLHQW UHVSRQVH DUH VXLWDEOH IRU SRUWDEOH FRPPXQLFDWRU VXFK DV
FHOO SKRQHV 3'$V ZDON\ WDONLHV 627 0LQL 0ROG SDFNDJH LV DYDLODEOH
FEATURES
•
8OWUD /RZ 6XSSO\ &XUUHQW 7\S $
•
6WDQGE\ 0RGH 7\S $
•
+LJK $FFXUDF\ 2XWSXW 9ROWDJH
•
+LJK 5LSSOH 5HMHFWLRQ 7\S G%I N+]
•
/RZ 'URSRXW 9ROWDJH 7\S 9,
287
P$ GHSHQGHQW RQ ([WHUQDO 7U
•
/RZ 7HPSHUDWXUH 'ULIW 7\S SSP&
•
+LJK /LQH 5HJXODWLRQ 7\S 9
•
2XWSXW 9ROWDJH6WHSZLVH VHWWLQJ ZLWK D VWHS RI 9 LQ WKH UDQJH RI 9 WR
9
•
&XUUHQW /LPLW IRU H[WHUQDO 7U 7\S P$ /LPLW D EDVH FXUUHQW
APPLICATIONS
•
3RZHU VRXUFH IRU EDWWHU\SRZHUHG HTXLSPHQW
•
7HOHFRPPXQLFDWLRQV &DPHUDV 9&5V
•
3RZHU VRXUFH IRU GRPHVWLF DSSOLDQFHV
1
RN5RF
BLOCK DIAGRAM
RN5RFxxA
4
V
DD
2
-
+
Vref
Current Limit
CE
5
Vref
Current Limit
EXT
RN5RFxxB
4
3
V
OUT
V
DD
2
-
+
EXT
3
V
OUT
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 UHTXHVW
7KH VHOHFWLRQ FDQ EH PDGH E\ GHVLJQDWLQJ WKH SDUW QXPEHU DV VKRZQ EHORZ
515) [[[[²[[←3DUW 1XPEHU
↑↑↑ ↑
DE F G
Code
D
6HWWLQJ 2XWSXW 9ROWDJH 9
287
6WHSZLVH VHWWLQJ ZLWK D VWHS RI 9 LQ WKH UDQJH RI 9 WR 9 LV SRVVLEOH
'HVLJQDWLRQ RI &KLS HQDEOH $FWLYH 7\SH
E
$ ´/ DFWLYH W\SH
µ
% ´+µ DFWLYH W\SH
'HVLJQDWLRQ RI 3DFNLQJ W\SH
F
$ 7DSLQJ
& $QWLVWDWLF EDJ RQO\ IRU VDPSOHV
G
'HVLJQDWLRQ RI 7DSLQJ W\SH
([ 75 7/ UHIHU WR 7DSLQJ 6SHFLILFDWLRQV 75 W\SH LV SUHVFULEHG DV D VWDQGDUG
Contents
2
RN5RF
PIN CONFIGURATION
SOT-23-5
5
4
CE/CE
(mark side)
GND
V
DD
EXT
V
OUT
1
2
3
PIN DESCRIPTION
Pin No.
Symbol
*1'
9
''
9
287
(;7
&( RU &(
*URXQG 3LQ
,QSXW 3LQ
2XWSXW 3LQ
([WHUQDO 7UDQVLVWRU 'ULYH 3LQ &026 2XWSXW
&KLS (QDEOH 3LQ
Pin Description
ABSOLUTE MAXIMUM RATINGS
Symbol
9
,1
9
&(
9
(;7
,
(;7
3
'
7RSW
7VWJ
,QSXW 9ROWDJH
,QSXW 9ROWDJH IRU &(&( 3LQ
(;7 2XWSXW 9ROWDJH
(;7 2XWSXW &XUUHQW
3RZHU 'LVVLSDWLRQ
2SHUDWLQJ 7HPSHUDWXUH 5DQJH
6WRUDJH 7HPSHUDWXUH 5DQJH
Item
Rating
WR 9
,1
WR 9
,1
WR
WR
Unit
9
9
9
P$
P:
&
&
ABSOLUTE MAXIMUM RATINGS
$EVROXWH 0D[LPXP UDWLQJV DUH WKUHVKROG OLPLW YDOXHV WKDW PXVW QRW EH H[FHHGHG HYHQ IRU DQ LQVWDQW XQGHU DQ\ FRQ
GLWLRQV 0RUHRYHU VXFK YDOXHV IRU DQ\ WZR LWHPV PXVW QRW EH UHDFKHG VLPXOWDQHRXVO\ 2SHUDWLRQ DERYH WKHVH DEVR
OXWH PD[LPXP UDWLQJV PD\ FDXVH GHJUDGDWLRQ RU SHUPDQHQW GDPDJH WR WKH GHYLFH 7KHVH DUH VWUHVV UDWLQJV RQO\ DQG
GR QRW QHFHVVDULO\ LPSO\ IXQFWLRQDO RSHUDWLRQ EHORZ WKHVH OLPLWV
3
RN5RF
ELECTRICAL CHARACTERISTICS
•
RN5RFxxA
7RSW &
Symbol
9
287
,
287
,
(;7
∆9
287
∆,
287
9
',)
,
66
,VWDQGE\
,
(;7OHDN
∆9
287
∆9
,1
5
5
9
,1
9
(;7
∆9
287
∆7RSW
5
38
9
&(+
9
&(/
*1)
*)
Item
2XWSXW 9ROWDJH
2XWSXW &XUUHQW
(;7 &XUUHQW
/RDG 5HJXODWLRQ
'URSRXW 9ROWDJH
6XSSO\ &XUUHQW
6WDQGE\ &XUUHQW
(;7 /HDNDJH &XUUHQW
/LQH 5HJXODWLRQ
5LSSOH 5HMHFWLRQ
,QSXW 9ROWDJH
(;7 2XWSXW 9ROWDJH
2XWSXW 9ROWDJH 7HPSHUDWXUH
&RHIILFLHQW
3XOO XS UHVLVWDQFH IRU &( SLQ
CE
,QSXW 9ROWDJH ´+µ
CE
,QSXW 9ROWDJH ´/
µ
,
287
P$
&≤7RSW≤&
9
,1
,
287
P$
9
287
9≤9
,1
≤9
I N+] VLQXVRLGDO 9SS
9
,1
9
287
9
Conditions
'
,1
'
287
'
Min.
'
287
Typ.
Max.
'
287
Unit
9
$
,
287
P$
9
,1
9
287
9
9
,1
9 9
(;7
9
9
,1
9
287
9
P$≤,
287
≤P$
,
287
P$ ,
287
P$
9
,1
9
287
9
9
,1
9
×
×
P$
P9
9
$
$
$
9
G%
9
9
SSP&
0Ω
9
9
The output current depends on the performance of external PNP transistor. Use External PNP transis-
tor of a low saturation type, with an h
FE
between 100 and 300.
With respect to Test Circuit, refer to Typical Application.
4
RN5RF
•
RN5RFxxB
7RSW &
Symbol
9
287
,
287
,
(;7
∆9
287
∆,
287
9
',)
,
66
,VWDQGE\
,
(;7OHDN
∆9
287
∆V
,1
5
5
9
,1
9
(;7
∆9
287
∆7RSW
5
3'
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 GRZQ UHVLVWDQFH IRU &(
SLQ
&( ,QSXW 9ROWDJH ´+µ
&( ,QSXW 9ROWDJH ´/
µ
,
287
P$
&≤7RSW≤&
9
,1
,
287
P$
9
287
9≤9
,1
≤9
I N+] VLQXVRLGDO 9SS
9
,1
²9
287
9
Conditions
9
,1
9
287
9
,
287
P$
9
,1
9
287
9
9
,1
9 9
(;7
9
9
,1
9
287
9
P$≤,
287
≤P$
,
287
P$
9
,1
²9
287
9
,
287
P$
9
,1
9
Min.
'
287
Typ.
Max.
'
287
Unit
9
$
×
×
P$
P9
9
$
$
$
9
G%
9
9
SSP&
0Ω
9
9
The output current depends on the performance of external PNP transistor. Use External PNP transis-
tor of a low saturation type, with an h
FE
between 100 and 300.
With respect to Test Circuit, refer to Typical Application.
5
stm32/stm8
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
