/2:#5,33/(#92/7$*(

5(*8/$725#:,7+#(;7(51$/

75$16,6725

$33/,&$7,21#0$18$/

5185)#6(5,(6

NO 。 EA- 043-0006

低纹波稳压器

与外部晶体管

5185)#6(5,(6

概要

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

特点

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#“433SSP2&

+LJK#/LQH#5HJXODWLRQ

1111111111111111111111111111111111111111111111111117<3

1#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<3

1#;P$/#/LPLW#D#EDVH#FXUUHQW

应用

3RZHU#VRXUFH#IRU#EDWWHU\0SRZHUHG#HTXLSPHQW

7HOHFRPPXQLFDWLRQV/#&DPHUDV/#9&5V

3RZHU#VRXUFH#IRU#GRPHVWLF#DSSOLDQFHV

1

RN5RF

框图

RN5RF

××

A

4

V

DD

2

-

+

VREF

电流限制

CE

5

VREF

电流限制

EXT

RN5RF

××

B

4

3

V

OUT

V

DD

2

-

+

EXT

3

V

OUT

1

GND

CE

5

1

GND

选购指南

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)#××××××←3DUW#1XPEHU

↑ ↑↑ ↑

EF摹

CODE

D

6HWWLQJ#2XWSXW#9ROWDJH#+9

287

,#=

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值w \\ SH

％ = ＃ ' + μ ＃ DFWLYH值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,

目录

2

RN5RF

引脚配置

SOT-23-5

5

4

CE / CE

（标记侧）

GND

V

DD

EXT

V

OUT

1

2

3

引脚说明

PIN号

4

5

6

7

8

符号

*1'

9

''

9

287

(;7

& （ ＃ RU ＃ & （

*URXQG#3LQ

,QSXW#3LQ

2XWSXW#3LQ

([WHUQDO#7UDQVLVWRU#'ULYH#3LQ#+&026#2XWSXW,

&KLS#(QDEOH#3LQ

引脚说明

绝对最大额定值

符号

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

项

等级

45

0316#WR#9

,1#

.316

45

83

483

073#WR#.;8

088#WR#.458

单位

9

9

9

P$

P:

?? &

?? &

绝对最大额定值

$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

电气特性

7RSW

58&

符号

9

287

,

287

,

(;7

9

287

2,

287

9

',)

,

66

， VWDQGE \\

,

(;7OHDN

9

287

29

,1

5

5

9

,1

9

(;7

9

287

27RSW

5

38

9

& （ +

9

& （ /

*1)

*)

项

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

＆放大器; RHIILFLHQW

3XOO#XS#UHVLVWDQFH#IRU#&(#SLQ

&(#,QSXW#9ROWDJH#+

&(#,QSXW#9ROWDJH#/

418

3

,

287

43P$

073&≤7RSW≤;8&

“433

7

9

,1

3158

,

287

83P$

9

287

.3189≤9

,1

≤439

I

4N+]/#VLQXVRLGDO#3189S0S

9

,1

09

287

4139

3

3138

93

43

43

条件

9

,1

0

9

287

4139

分钟。

9

287

典型值。

马克斯。

9

287

单位

9

$

,

287

83P$

9

,1

09

287

4139

9

,1

7139

(;7

5139

/#9

9

,1

09

287

4139

4P$≤,

287

≤433P$

,

287

433P$/#,

287

3P$

9

,1

09

287

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

SSP2&

0

9

9

的输出电流依赖于外部PNP晶体管的性能。使用外部PNP晶体管

器的低饱和度类型的，用高电平

FE

介于100和300 。

对于测试电路，见典型应用。

4