LOW RIPPLE VOLTAGE REGULATOR
WITH EXTERNAL TRANSISTOR
515) 6(5,(6
NO. EA-043-0204
OUTLINE
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FEATURES
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9
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APPLICATIONS
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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
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515) [[[[²[[←3DUW 1XPEHU
↑↑↑ ↑
DE F G
Code
D
6HWWLQJ 2XWSXW 9ROWDJH 9
287
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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
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3RZHU 'LVVLSDWLRQ
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6WRUDJH 7HPSHUDWXUH 5DQJH
Item
Rating
WR 9
,1
WR 9
,1
WR
WR
Unit
9
9
9
P$
P:
&
&
ABSOLUTE MAXIMUM RATINGS
$EVROXWH 0D[LPXP UDWLQJV DUH WKUHVKROG OLPLW YDOXHV WKDW PXVW QRW EH H[FHHGHG HYHQ IRU DQ LQVWDQW XQGHU DQ\ FRQ
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3
RN5RF
ELECTRICAL CHARACTERISTICS
•
RN5RFxxA
7RSW &
Symbol
9
287
,
287
,
(;7
∆9
287
∆,
287
9
',)
,
66
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,
(;7OHDN
∆9
287
∆9
,1
5
5
9
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9
(;7
∆9
287
∆7RSW
5
38
9
&(+
9
&(/
*1)
*)
Item
2XWSXW 9ROWDJH
2XWSXW &XUUHQW
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'URSRXW 9ROWDJH
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,
287
P$
&≤7RSW≤&
9
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,
287
P$
9
287
9≤9
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≤9
I N+] VLQXVRLGDO 9SS
9
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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
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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\
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∆9
287
∆V
,1
5
5
9
,1
9
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∆9
287
∆7RSW
5
3'
9
&(+
9
&(/
*1)
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Item
2XWSXW 9ROWDJH
2XWSXW &XUUHQW
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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
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