NO. EA-059-0006
/2:#12,6(#483P$#/'2
5(*8/$725
54445 1#6(5,(6
$33/,&$7,21#0$18$/
LOW NOISE 150mA LDO REGULATOR
544451#6(5,(6
1
OUTLINE
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FEATURES
8OWUD0/RZ#6XSSO\#&XUUHQW 11111111111111111111111111111111111111111111111111 7<31#433µ$
6WDQGE\#0RGH#&XUUHQW11111111111111111111111111111111111111111111111111111111 7<31#314µ$
/RZ#'URSRXW#9R O W D J H 1111111111111111111111111111111111111111111111111111111111 7<31#314<9#+,287 433P$#6139#2XWSXW#W\SH,
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([FHOOHQW#'\QDPLF#5HVSRQVH
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2XWSXW#9R O W D J H 111111111111111111111111111111111111111111111111111111111111111111111 6WHSZLVH#VHWWLQJ#ZLWK#D#VWHS#RI#3149#LQ#WKH#UDQJH#RI#4189#WR
8139#LV#SRVVLEOH
%XLOW0LQ#FKLS#HQDEOH#FLUFXLW#+5#W\SHV>#$=#DFWLYH#ORZ/#%=#DFWLYH#KLJK,
3LQ0RXW1111111111111111111111111111111111111111111111111111111111111111111111111111111111 6LPLODU#WR#WKH#/35<;32/35<;8
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APPLICATIONS
3RZHU#VRXUFH#IRU#FHOOXODU#SKRQHV#VXFK#DV#*60/#&'0$#DQG#YDULRXV#NLQG#RI#3&6V1
3RZHU#VRXUFH#IRU#HOHFWULFDO#DSSOLDQFHV#VXFK#DV#FDPHUDV/#9&5V#DQG#FDPFRUGHUV1
3RZHU#VRXUFH#IRU#EDWWHU\0SRZHUHG#HTXLSPHQW1
R1112N
2
BLOCK DIAGRAM
R1112NXX1A R1112NXX1B
Vref
Current Limit
V
DD
15
23
V
OUT
GNDCE
Vref
Current Limit
V
DD
15
23
V
OUT
GNDCE
SELECTION GUIDE
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UHTXHVW1#7KH#VHOHFWLRQ#FDQ#EH#PDGH#E\#GHVLJQDWLQJ#WKH#SDUW#QXPEHU#DV#VKRZQ#EHORZ=
54445;;;4;0;; 3DUW#1XPEHU
↑↑
DE F G
Code Contents
D'HVLJQDWLRQ#RI#3DFNDJH#7\ S H =
1=#62705608#+0LQL0PROG,
E6HWWLQJ#2XWSXW#9R O W D J H #+9287,=
6WHSZLVH#VHWWLQJ#ZLWK#D#VWHS#RI#3149#LQ#WKH#UDQJH#RI#4189#WR#8139#LV#SRVVLEOH1
F
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R1112N
3
PIN CONFIGURATION SOT-23-5
54
V
OUT
NC
(mark side)
123
V
DD
GND CE
PIN DESCRIPTION
Pin No. Symbol Description
49'' ,QSXW#3LQ
5*1' *URXQG#3LQ
6&( #RU#&( &KLS#(QDEOH#3LQ
71& 1R#&RQQHFWLRQ
89287 2XWSXW#SLQ
R1112N
4
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
9,1 ,QSXW#9R O W D J H :13 9
9&( ,QSXW#9R O W D J H +&( #RU#&(#3LQ,0316#a#9,1.316 9
9287 2XWSXW#9R O W D J H 0316#a#9,1.316 9
,287 2XWSXW#&XUUHQW 533 P$
3'3RZHU#'LVVLSDWLRQ 583 P:
7RSW 2SHUDWLQJ#7HPSHUDWXUH#5DQJH 073#a#;8 °&
7V W J 6 W R U D J H #7HPSHUDWXUH#5DQJH 088#a#458 °&
ELECTRICAL CHARACTERISTICS
R1112NXX1A 7R S W 58°&
Symbol Item Conditions MIN. TYP. MAX. Unit
9287 2XWSXW#9R O W D J H 9,1# #6HW#9287.49
4P$##,287##63P$
9287
×31<;
9287
×4135 9
,287 2XWSXW#&XUUHQW 9,1#0#9287# #4139483 P$
92872,287 /RDG#5HJXODWLRQ 9,1# #6HW#9287.49
4P$##,287##;3P$ 45 73 P9
9',) 'URSRXW#9R O W D J H 5HIHU#WR#WKH#(/(&75,&$/#&+$5$&7(5,67,&6#E\#287387
92/7$*(
,66 6XSSO\#&XUUHQW 9,1# #6HW#9287.49433 4:3 µ$
,VWDQGE\ 6XSSO\#&XUUHQW#+6WDQGE\,9,1# #9&(# #6HW#9287.49314 413 µ$
928729,1 /LQH#5HJXODWLRQ 6HW#9287.3189##9,1##;9
,287# #63P$ 3138 3153 (29
55 5LSSOH#5HMHFWLRQ I# #4N+]/#5LSSOH#3189S0S
9,1# #6HW#9287.49;3 G%
9,1 ,QSXW#9R O W D J H 513 913 9
9287272XWSXW#9R O W D J H
7HPSHUDWXUH#&RHIILFLHQW
,287# #63P$
073°&##7R S W ##;8°&433 SSP
2°&
,OLP 6KRUW#&XUUHQW#/LPLW 9287# #3963 P$
538 &( #3XOO0XS#5HVLVWDQFH 518 8 43 0
9&(+ &( #,QSXW#9R O W D J H #´+µ 418 9,1 9
9&(/ &( #,QSXW#9R O W D J H #´/µ 3 3158 9
HQ2XWSXW#1RLVH %: 43+]#WR#433N+] 63 µ9UPV
R1112N
5
R1112NXX1B 7R S W 58°&
Symbol Item Conditions MIN. TYP. MAX. Unit
9287 2XWSXW#9R O W D J H 9,1# #6HW#9287.49
4P$##,287##63P$
9287
×31<;
9287
×4135 9
,287 2XWSXW#&XUUHQW 9,1#0#9287# #4139483 P$
92872,287 /RDG#5HJXODWLRQ 9,1# #6HW#9287.49
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92/7$*(
,66 6XSSO\#&XUUHQW 9,1# #6HW#9287.49433 4:3 µ$
,VWDQGE\ 6XSSO\#&XUUHQW#+6WDQGE\,9,1# #6HW#9287.49
9&( *1' 314 413 µ$
928729,1 /LQH#5HJXODWLRQ 6HW#9287.3189##9,1##;9
,287# #63P$ 3138 3153 (29
55 5LSSOH#5HMHFWLRQ I# #4N+]/#5LSSOH#3189S0S
9,1# #6HW#9287.49;3 G%
9,1 ,QSXW#9R O W D J H 513 913 9
9287272XWSXW#9R O W D J H
7HPSHUDWXUH#&RHIILFLHQW
,287# #63P$
073°&##7R S #W##;8°&433 SSP
2°&
,OLP 6KRUW#&XUUHQW#/LPLW 9287# #3963 P$
53' &(#3XOO0GRZQ#5HVLVWDQFH 518 8 43 0
9&(+ &(#,QSXW#9R O W D J H #´+µ 418 9,1 9
9&(/ &(#,QSXW#9R O W D J H #´/µ 3 3158 9
HQ2XWSXW#1RLVH %: 43+]#WR#433N+] 63 µ9UPV
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
7R S W # #58°&
Dropout Voltage
VDIF (V)
Output Voltage
VOUT (V) Condition TYP. MAX.
418##9287##419 3165 3188
41:##9287##41; 315; 317:
41<##9287##516 3158 3168
517##9287##51: 3153 315<
51;##9287##813
,287# #433P$
314< 3159
R1112N
6
OPERATION R1112NXX1A R1112NXX1B
V
DD
15
23
V
OUT
GND
R2
R1
CE Current Limit
Vref
V
DD
15
23
V
OUT
GND
R2
R1
CE Current Limit
Vref
,Q#WKHVH#,&V/#IOXFWXDWLRQ#RI#2XWSXW#9R O W D J H /#9287#LV#GHWHFWHG#E\#)HHG0EDFN#5HJLVWHUV#54/#55/#DQG#WKH#UHVXOW#LV#FRP0
SDUHG#ZLWK#D#UHIHUHQFH#YROWDJH#E\#(UURU#$PSOLILHU/#VR#WKDW#D#FRQVWDQW#YROWDJH#LV#RXWSXW1#$#FXUUHQW#OLPLW#FLUFXLW#IRU#SUR0
WHFWLRQ#DW#VKRUW#PRGH#DQG#D#FKLS#HQDEOH#FLUFXLW#DUH#LQFOXGHG1
TECHNICAL NOTES
:KHQ#XVLQJ#WKHVH#,&V/#FRQVLGHU#WKH#IROORZLQJ#SRLQWV=
3KDVH#&RPSHQVDWLRQ
,Q#WKHVH#,&V/#SKDVH#FRPSHQVDWLRQ#LV#PDGH#IRU#VHFXULQJ#VWDEOH#RSHUDWLRQ#HYHQ#LI#WKH#ORDG#FXUUHQW#LV#YDULHG1#)RU#WKLV
SXUSRVH/#EH#VXUH#WR#XVH#D#FDSDFLWRU#&287#ZLWK#JRRG#IUHTXHQF\#FKDUDFWHULVWLFV#DQG#(65#+(TXLYDOHQW#6HULHV#5HVLVWDQFH,1
:H#XVH#&HUDPLF#&DSDFLWRUV#IRU#HYDOXDWLRQ#RI#WKHVH#,&V1
5HFRPPHQGHG#&DSDFLWRUV>*5073;85558.916#+0XUDWD,
*50730367;85668.916#+0XUDWD,
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+1RWH=#:KHQ#WKH#DGGLWLRQDO#FHUDPLF#FDSDFLWRUV#DUH#FRQQHFWHG#WR#WKH#2XWSXW#3LQ#ZLWK#2XWSXW#FDSDFLWRU#IRU#SKDVH#FRP0
SHQVDWLRQ/#WKH#RSHUDWLRQ#PLJKW#EH#XQVWDEOH1#%HFDXVH#RI#WKLV/#WHVW#WKHVH#,&V#ZLWK#DV#VDPH#H[WHUQDO#FRPSRQHQWV#DV#RQHV
WR#EH#XVHG#RQ#WKH#3&%1,
3&%#/D\RXW
0DNH#9''#DQG#*1'#OLQH#VXIILFLHQW1#:KHQ#WKH#LPSHGDQFH#RI#WKHVH#LV#KLJK/#LW#ZRXOG#EH#D#FDXVH#RI#SLFNLQJ#XS#WKH#QRLVH
RU#XQVWDEOH#RSHUDWLRQ1#&RQQHFW#D#FDSDFLWRU#ZLWK#D#FDSDFLWDQFH#YDOXH#RI#515µ)#RU#PRUH#EHWZHHQ#9''#DQG#*1'#SLQ#DV
FORVH#DV#SRVVLEOH1
6HW#H[WHUQDO#FRPSRQHQWV/#HVSHFLDOO\#RXWSXW#FDSDFLWRU#DV#FORVH#DV#SRVVLEOH#WR#WKH#,&V#DQG#PDNH#ZLULQJ#VKRUWHVW1
R1112N
7
TEST CIRCUITS
R1112Nxx1B Series
V
DD
5
1
2
3
V
OUT
I
OUT
IN OUT
GND
CE
2.2µF
R1112Nxx1B Series
V
DD
5
1
2
3
V
OUT
I
SS
IN OUT
GND
CE
2.2µF
Fig.1 Standard test Circuit Fig.2 Supply Current Test Circuit
R1112Nxx1B Series
V
DD
5
1
P.G 2
3
V
OUT
I
OUT
IN OUT
GND
CE
R1112Nxx1B Series
V
DD
5
1
2
3
V
OUT
IN OUT
GND I1 I2
CE
2.2µF
Fig.3 Ripple Rejection, Line Tr ansient Response
Test Circuit
Fig.4 Load Transient Response Test Circuit
R1112N
8
TYPICAL APPLICATION
R1112NXX1A
Series V
OUT
OUTIN V
DD
GND
CE
Cap.
Cap.
R1112Nxx1B
Series V
OUT
OUTIN V
DD
GND
CE
Cap.
Cap.
+([WHUQDO#&RPSRQHQWV,
2XWSXW#&DSDFLWRU>&HUDPLF#515µ)+6HW#2XWSXW#9R O W D J H #LQ#WKH#UDQJH#IURP#518#WR#8139,
&HUDPLF#71:µ)#+6HW#2XWSXW#9R O W D J H #LQ#WKH#UDQJH#IURP#418#WR#5189,
,QSXW#&DSDFLWRU>&HUDPLF#515µ)
R1112N
9
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
R11x2N151B R11x2N201B
Output Voltage V
OUT
(V)
V
IN
=2.0V
V
IN
=2.5V
V
IN
=3.5V
Output Current I
OUT
(mA)
0 100 200 300 500400
1.6
1.8
1.4
1.2
1
0.8
0.4
0.2
0.6
0
Output Voltage V
OUT
(V)
V
IN
=2.3V
V
IN
=2.5V
V
IN
=3.0V
V
IN
=4.0V
Output Current I
OUT
(mA)
0 100 200 300 500400
2.5
2
1.5
0.5
1
0
R11x2N301B R11x2N401B
Output Voltage V
OUT
(V)
V
IN
=3.3V
V
IN
=3.5V
V
IN
=4.0V
V
IN
=5.0V
Output Current I
OUT
(mA)
0 100 200 300 500400
3.5
3
2.5
0.5
1.5
1
2
0
Output Voltage V
OUT
(V)
V
IN
=4.3V
V
IN
=4.5V
V
IN
=5.0V
V
IN
=6.0V
Output Current I
OUT
(mA)
0 100 200 300 500400
5
4
3
1
2
0
R11x2N501B
Output Voltage V
OUT
(V)
V
IN
=5.3V
V
IN
=5.5V
V
IN
=6.0V
V
IN
=7.0V
Output Current I
OUT
(mA)
0 100 200 300 500400
6
5
4
1
2
3
0
R1112N
10
2) Output Voltage vs. Input V oltage
R11x2N151B R11x2N201B
Output Voltage V
OUT
(V)
I
OUT
=1mA
I
OUT
=30mA
I
OUT
=50mA
Input Voltage V
IN
(V)
12 34 675
1.600
1.500
1.400
1.300
1.200
1.100
1.000
Output Voltage V
OUT
(V)
I
OUT
=1mA
I
OUT
=30mA
I
OUT
=50mA
Input Voltage V
IN
(V)
12 34 675
2.100
2.000
1.900
1.800
1.700
1.600
1.500
R11x2N301B R11x2N401B
Output Voltage V
OUT
(V)
I
OUT
=1mA
I
OUT
=30mA
I
OUT
=50mA
Input Voltage V
IN
(V)
234 675
3.100
3.000
2.900
2.800
2.700
2.600
2.500
Output Voltage V
OUT
(V)
I
OUT
=1mA
I
OUT
=30mA
I
OUT
=50mA
Input Voltage V
IN
(V)
234 675
4.500
4.000
3.500
3.000
2.500
R11x2N501B
Output Voltage V
OUT
(V)
I
OUT
=1mA
I
OUT
=30mA
I
OUT
=50mA
Input Voltage V
IN
(V)
234 675
5.500
5.000
4.500
4.000
3.500
3.000
2.500
R1112N
11
3) Dropout Voltage vs. Output Current
R11x2N151B R11x2N201B
Dropout Voltage VDIF(V)
Topt=-40°C
Topt=25°C
Topt=85°C
Output Current IOUT(mA)
0 50 150100
0.600
0.500
0.400
0.300
0.200
0.100
0.000
Dropout Voltage V
DIF
(V)
Topt=-40°C
Topt=25°C
Topt=85°C
Output Current I
OUT
(mA)
0 50 150100
0.600
0.500
0.400
0.300
0.200
0.100
0.000
R11x2N301B R11x2N401B
Dropout Voltage VDIF(V)
Topt=-40°C
Topt=25°C
Topt=85°C
Output Current IOUT(mA)
0 50 150100
0.600
0.500
0.400
0.300
0.200
0.100
0.000
Dropout Voltage V
DIF
(V)
Topt=-40°C
Topt=25°C
Topt=85°C
Output Current I
OUT
(mA)
0 50 150100
0.600
0.500
0.400
0.300
0.200
0.100
0.000
R11x2N501B
Dropout Voltage V
DIF
(V)
Topt=-40°C
Topt=25°C
Topt=85°C
Output Current I
OUT
(mA)
0 50 150100
0.600
0.500
0.400
0.300
0.200
0.100
0.000
R1112N
12
4) Output Voltage vs. Temperature
R11x2N151A/B R11x2N201B
Output VoltageV
OUT
(V)
V
IN
=2.5V C
IN
=1µF
C
OUT
=2.2µF I
OUT
=30mA
Temperature Topt (°C)
-50 -25 0 25 100
50 75
1.53
1.52
1.51
1.50
1.49
1.47
1.48
Output VoltageV
OUT
(V)
V
IN
=3.0V C
IN
=1µF
C
OUT
=2.2µF I
OUT
=30mA
Temperature Topt (°C)
-50 -25 0 25 100
50 75
2.10
2.08
2.04
2.06
2.00
2.02
1.98
1.96
1.90
1.94
1.92
R11x2N301A/B R11x2N401A/B
Output VoltageV
OUT
(V)
V
IN
=4.0V C
IN
=1µF
C
OUT
=2.2µF I
OUT
=30mA
Temperature Topt (°C)
-50 -25 0 25 100
50 75
3.06
3.04
3.02
3.00
2.98
2.94
2.96
Output VoltageV
OUT
(V)
V
IN
=5.0V C
IN
=1µF
C
OUT
=2.2µF I
OUT
=30mA
Temperature Topt (°C)
-50 -25 0 25 100
50 75
4.08
4.06
4.04
4.00
4.02
3.98
3.92
3.96
3.94
R11x2N501A/B
Output VoltageV
OUT
(V)
V
IN
=6.0V C
IN
=1µF
C
OUT
=2.2µF I
OUT
=30mA
Temperature Topt (°C)
-50 -25 0 25 100
50 75
5.10
5.08
5.04
5.06
5.00
5.02
4.98
4.96
4.90
4.94
4.92
R1112N
13
5) Supply Current vs. Input Voltage
R11x2N151B R11x2N201B
Supply Current I
SS
(µA)
Input Voltage V
IN
(V)
12 34 756
120
100
80
60
40
20
0
Supply Current I
SS
(µA)
Input Voltage V
IN
(V)
12 34 756
120
100
80
60
40
20
0
R11x2N301B R11x2N401B
Supply Current I
SS
(µA)
Input Voltage V
IN
(V)
12 34 756
120
100
80
60
40
20
0
Supply Current I
SS
(µA)
Input Voltage V
IN
(V)
12 34 756
120
100
80
60
40
20
0
R11x2N501B
Supply Current I
SS
(µA)
Input Voltage V
IN
(V)
12 34 756
120
100
80
60
40
20
0
R1112N
14
6) Supply Current vs. Temperature
R11x2N151A/B R11x2N201A/B
Supply Current ISS (µA)
Temperature Topt (°C)
-50 -25 0 25
VIN=2.5V CIN=1µF
COUT=2.2µF
10050 75
200
150
100
50
0
Supply Current I
SS
(µA)
Temperature Topt (°C)
-50 -25 0 25
V
IN
=3.0V C
IN
=1µF
C
OUT
=2.2µF
10050 75
200
150
100
50
0
R11x2N301A/B R11x2N401A/B
Supply Current I
SS
(µA)
Temperature Topt (°C)
-50 -25 0 25
V
IN
=4.0V C
IN
=1µF
C
OUT
=2.2µF
10050 75
200
150
100
50
0
Supply Current I
SS
(µA)
Temperature Topt (°C)
-50 -25 0 25
V
IN
=5.0V C
IN
=1µF
C
OUT
=2.2µF
10050 75
200
150
100
50
0
R11x2N501A/B
Supply Current I
SS
(µA)
Temperature Topt (°C)
-50 -25 0 25
V
IN
=6.0V C
IN
=1µF
C
OUT
=2.2µF
10050 75
200
150
100
50
0
R1112N
15
7) Ripple Rejection vs. Frequency
R11x2N151A/B R11x2N201A/B
Ripple Rejection RR (dB)
Frequency Freq (kHz)
0.1 1
V
IN
=2.5V+0.5Vp-p
C
OUT
=2.2µF I
OUT
=30mA
10010
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
Ripple Rejection RR (dB)
Frequency Freq (kHz)
0.1 1
V
IN
=3.0V+0.5Vp-p
C
OUT
=2.2µF I
OUT
=30mA
10010
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
R11x2N301A/B R11x2N401A/B
Ripple Rejection RR (dB)
Frequency Freq (kHz)
0.1 1
V
IN
=4.0V+0.5Vp-p
C
OUT
=2.2µF I
OUT
=30mA
10010
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
Ripple Rejection RR (dB)
Frequency Freq (kHz)
0.1 1
V
IN
=5.0V+0.5Vp-p
C
OUT
=2.2µF I
OUT
=30mA
10010
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
R11x2N501A/B
Ripple Rejection RR (dB)
Frequency Freq (kHz)
0.1 1
V
IN
=6.0V+0.5Vp-p
C
OUT
=2.2µF I
OUT
=30mA
10010
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00