LOW NOISE 150mA LDO REGULATOR
1
NO. EA-057-0204
OUTLINE
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FEATURES
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APPLICATIONS
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R1111N
2
BLOCK DIAGRAM
R1111Nxx1A R1111Nxx1B
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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←<
↑↑ ↑ ↑
Code Contents
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R1111N
3
PIN CONFIGURATION
SOT-23-5
54
V
OUT
NC
(mark side)
123
V
DD
GND CE
PIN DESCRIPTION
Pin No. Symbol Description
3 !<!
(C2 C!<!
) $ $!<!
E !!!
*3 !
ABSOLUTE MAXIMUM RATINGS
Item Symbol Rating Unit
!3 3 A3
!3+ $<!, 3 1#)F3G1#) 3
3 3 1#)F3G1#) 3
! (11 0
<2! <(*1 H
!
! E1FB* °
! **F(* °
R1111N
4
ELECTRICAL CHARACTERISTICS
•R1111Nxx1A 4 ( * °
Symbol Item Conditions Min. Typ. Max. Unit
3 3 343G3
0≤≤)1 0
3
×1#AB
3
×#1( 3
! %$.$0.500$-<-
3.0C$
∆3:∆ .! 343G3
0≤≤B1 0 ( E1 3
3 23 %$.$0.500$-<-
3.0C$
! 343G3 )* 61 µ0
! !+!, 34343G3 1# #1 µ0
∆3:∆3 .!! 3G1#*3≤3≤B3
4)1 0 1#1* 1#(1 ;:3
"! %4'581#*3
343G3 61 7
3 !3 ( B 3
∆3:∆3
%%!
4)1 0
E1°≤≤B*°911
:°
!. 3413 *1 0
<! (#* *#1 1#1 Ω
3 !3?5@ #* 3 3
3 !3?.@ 1#11 1#(* 3
! 7H4158∼11'58 )1 µ3
R1111N
5
•R1111Nxx1B 4 ( * °
Symbol Item Conditions Min. Typ. Max. Unit
3 3 343G3
0≤≤)1 0
3
×1#AB
3
×#1( 3
! %$.$0.500$-<-
3.0C$
∆3:∆ .! 343G3
0≤≤B1 0 ( E1 3
3 23 %$.$0.500$-<-
3.0C$
! 343G3 )* 61 µ0
! !+!, 343G3
34C2 1# #1 µ0
∆3:∆3 .!! 3G1#*3≤3≤B3
4)1 0 1#1* 1#(1 ;:3
"! %4I581#*3
343G3 61 7
3 !3 ( B 3
∆3:∆3
%%!
4)1 0
E1°≤≤B*°911
:°
!. 3413 *1 0
$<!! (#* *#1 1#1 Ω
3 $!3?5@ #* 3 3
3 $!3?.@ 1#11 1#(* 3
! 7H4158∼11'58 )1 µ3
R1111N
6
•ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
4(*°
Output Current
IOUT (mA)Output Voltage
Condition Min.
#*≤3≤#6 11
#B≤3≤*#1 334#13 *1
4(*°
Dropout Voltage
VDIF (V)
Output Voltage
VOUT (V) Condition Min. Typ. Max.
#* 1#*1
#J 1#E1
#6 1#)1
#B≤3≤#A 1#J1 #E1
(#1≤3≤(#E 1#)* 1#61
(#*≤3≤(#6 1#(E 1#)*
(#B≤3≤)#) 1#(1 1#)1
)#E≤3≤*#1
411 0
1#6 1#(J
OPERATION
R1111Nxx1A R1111Nxx1B
VDD
15
23
VOUT
GND
R2
R1
CE Current Limit
Vref
VDD
15
23
VOUT
GND
R2
R1
CE Current Limit
Vref
!%!%3%'(!
%! %!!#0!
%! !!!#
R1111N
7
TEST CIRCUITS
R1111Nxx1B Series
V
DD
5
1
2
3
V
OUT
I
OUT
IN OUT
GND
CE
0.1µF
2.2µF
R1111Nxx1B Series
V
DD
5
1
2
3
V
OUT
I
SS
IN OUT
GND
CE
0.1µF
2.2µF
Fig.1 Standard test Circuit Fig.2 Supply Current Test Circuit
R1111Nxx1B Series
V
DD
5
1
P. G 2
3
V
OUT
I
OUT
IN OUT
GND
CE
R1111Nxx1B Series
V
DD
5
1
2
3
V
OUT
IN OUT
GND I1 I2
CE
1µF
Fig.3 Ripple Rejection, Line Transient Response Fig.4 Load Transient Response Test Circuit
Test Circuit
R1111N
8
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
R1111N181B R1111N301B
2.0
1.8
1.6
1.0
0.8
0.6
0.4
0.2
1.4
1.2
0.0
Output Current I
OUT
(mA)
0 200 300 400 500100
Output Voltage V
OUT
(V)
3.8V 2.8V
2.3V
V
IN
= 2.1V
Topt = 25°C
3.5
2.5
1.5
1.0
0.5
2.0
3.0
0.0
Output Current I
OUT
(mA)
0 200 300 400 500100
Output Voltage V
OUT
(V)
5.0V
4.0V
3.5V
V
IN
= 3.3V
Topt = 25°C
R1111N401B R1111N501B
5.0
4.5
4.0
2.5
2.0
1.5
1.0
0.5
3.5
3.0
0.0
Output Current I
OUT
(mA)
0 200 300 400 500100
Output Voltage V
OUT
(V)
6.0V
5.0V
4.5V
V
IN
= 4.3V
Topt = 25°C
6.0
5.0
3.0
2.0
1.0
4.0
0.0
Output Current I
OUT
(mA)
0 200 300 400 500100
Output Voltage (V)
7.0V
6.0V
5.5V
V
IN
= 5.3V
Topt = 25°C
2) Output Voltage vs. Input Voltage
R1111N181B R1111N301B
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.2
1.3
Input Voltage V
IN
(V)
1.0 4.0 5.0 6.0 7.0 8.02.0 3.0
Output Voltage V
OUT
(V)
I
OUT
= 1mA
30mA
50mA
Topt = 25°C
3.1
3.0
2.9
2.8
2.7
2.5
2.6
Input Voltage V
IN
(V)
2.0 4.0 5.0 6.0 7.0 8.03.0
Output Voltage V
OUT
(V)
Topt = 25°C
30mA
50mA
I
OUT
=1mA
R1111N
9
R1111N401B R1111N501B
4.5
4.0
3.5
3.0
2.5
Intput Voltage V
IN
(V)
2.0 4.0 5.0 6.0 8.07.03.0
Output Voltage V
OUT
(V)
I
OUT
= 1mA
30mA
50mA
Topt = 25°C
5.5
5.0
4.0
3.5
3.0
4.5
2.5
Intput Voltage V
IN
(V)
2.0 4.0 5.0 6.0 8.07.03.0
Output Voltage V
OUT
(V)
I
OUT
= 1mA
30mA
50mA
Topt = 25°C
3) Dropout Voltage vs. Output Current
R1111N181B R1111N301B
1.20
1.00
0.80
0.60
0.40
0.20
0.00
Output Current I
OUT
(mA)
050100 150
Dropout Voltage V
DIF
(V)
Topt = 85°C
25°C
-40°C
0.40
0.35
0.30
0.20
0.15
0.10
0.05
0.25
0.00
Output Current I
OUT
(mA)
050100 150
Dropout Voltage V
DIF
(V)
Topt = 85°C
25°C
-40°C
R1111N401B R1111N501B
0.40
0.35
0.30
0.25
0.20
0.15
0.00
0.05
0.10
Output Current IOUT (mA)
050100 150
Dropout Voltage VDIF (V)
Topt = 85°C
25°C
-40°C
0.40
0.35
0.30
0.25
0.20
0.15
0.00
0.05
0.10
Output Current I
OUT
(mA)
050100 150
Dropout Voltage V
DIF
(V)
Topt = 85°C
25°C
-40°C
R1111N
10
4) Output Voltage vs. Temperature
R1111N181B R1111N301B
1.90
1.88
1.86
1.80
1.78
1.76
1.74
1.72
1.84
1.82
1.70
Temperature Topt (°C)
-50 0 25 50 10075-25
Output Voltage V
OUT
(V)
V
IN
= 2.8V
I
OUT
= 30mA
3.10
3.08
3.06
3.00
2.98
2.96
2.94
2.92
3.04
3.02
2.90
Temperature Topt (°C)
-50 0 25 50 10075-25
Output Voltage VOUT (V)
IOUT = 30mA
VIN = 4.0V
R1111N401B R1111N501B
4.10
4.08
4.06
4.00
3.98
3.96
3.94
3.92
4.04
4.02
3.90
Temperature Topt (°C)
-50 0 25 50 10075-25
Output Voltage V
OUT
(V)
I
OUT
= 30mA
V
IN
= 5.0V
5.10
5.08
5.06
5.00
4.98
4.96
4.94
4.92
5.04
5.02
4.90
Temperature Topt (°C)
-50 0 25 50 10075-25
Output Voltage V
OUT
(V)
I
OUT
= 30mA
V
IN
= 6.0V
5) Supply Current vs. Input Voltage
R1111N181B R1111N301B
60
50
40
30
20
0
10
Input Voltage V
IN
(V)
1.0 2.0 4.0 5.0 6.0 7.0 8.03.0
Supply Current II
SS
(µA)
Topt = 25°C
60
50
40
30
20
0
10
Input Voltage V
IN
(V)
1.0 2.0 4.0 5.0 6.0 7.0 8.03.0
Supply Current II
SS
(µA)
Topt = 25°C
R1111N
11
R1111N401B R1111N501B
60
50
40
30
20
10
0
Intput Voltage V
IN
(V)
1.0 4.0 5.0 6.0 7.0 8.02.0 3.0
Supply Current I
SS
(µA)
Topt = 25°C
60
50
40
30
20
10
0
Intput Voltage V
IN
(V)
1.0 4.0 5.0 6.0 7.0 8.02.0 3.0
Supply Current I
SS
(µA)
Topt = 25°C
6) Supply Current vs. Temperature
R1111N181B R1111N301B
50
45
40
35
30
20
25
Temperature Topt (°C)
-50 50 1000
Supply Current I
SS
(µA)
V
IN
= 2.8V
50
45
40
35
30
20
25
Temperature Topt (°C)
-50 50 1000
Supply Current I
SS
(µA)
V
IN
= 4.0V
R1111N401B R1111N501B
50
45
40
35
30
20
25
Temperature Topt (°C)
-50 50 1000
Supply Current ISS (µA)
VIN = 5.0V
50
45
40
35
30
20
25
Temperature Topt (°C)
-50 50 1000
Supply Current I
SS
(µA)
V
IN
= 6.0V
R1111N
12
7) Dropout Voltage vs. Set Output Voltage
R1111Nxx1B
0.8
0.9
1.0
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1.0 2.0 3.0 4.0 5.0
IOUT = 150mA
IOUT = 100mA
IOUT = 50mA
IOUT = 30mA
IOUT = 10mA
Set Output Voltage Vreg (V)
Dropout Voltage VDIF (V)
Topt = 25
8) Ripple Rejection vs. Frequency
R1111N181B R1111N181B
80
70
60
50
40
30
20
10
0
0.1 1 10 100
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
Frequuency f (kHz)
Ripple Rejection RR (dB)
V
IN
= 2.8V
DC
+ 0.5Vp-p
C
OUT
= tantal 1.0µF
80
70
60
50
40
30
20
10
0
0.1 1 10 100
IOUT= 1mA
IOUT = 30mA
IOUT = 50mA
Frequuency f (kHz)
Ripple Rejection RR (dB)
VIN = 2.8VDC + 0.5Vp-p
COUT = tantal 2.2µF
R1121N301B R1121N301B
80
70
60
50
40
30
20
10
0
0.1 1 10 100
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
Frequuency f (kHz)
Ripple Rejection RR (dB)
V
IN
= 4V
DC
+ 0.5Vp-p
C
OUT
= tantal 1.0µF
80
70
60
50
40
30
20
10
0
0.1 1 10 100
IOUT = 1mA
IOUT = 30mA
IOUT = 50mA
Frequuency f (kHz)
Ripple Rejection RR (dB)
VIN = 4VDC + 0.5Vp-p
COUT = tantal 2.2µF
R1111N
13
R1111N401B R1111N401B
80
70
60
50
40
30
20
10
0
0.1 1 10 100
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
Frequeney f (kHz)
Ripple Rejection RR (dB)
V
IN
= 5.0V
DC
+ 0.5Vp-p
C
OUT
= tantal 1.0µF
80
70
60
50
40
30
20
10
00.1 1 10 100
I
OUT
= 1mA
I
OUT
= 30mA
I
OUT
= 50mA
Frequeney f (kHz)
Ripple Rejection RR (dB)
V
IN
= 5.0V
DC
+ 0.5Vp-p
C
OUT
= tantal 2.2µF
9) Ripple Rejection vs. Input Voltage (DC bias)
R1111N301B R1111N301B
80
70
60
50
40
30
20
10
0
3.1 3.2 3.3 3.4 3.5
f = 400Hz
f = 1kHz
f = 10kHz
Input Voltage VIN (V)
Ripple Rejection RR (dB)
IOUT = 1mA
COUT = 2.2µF
80
70
60
50
40
30
20
10
0
3.1 3.2 3.3 3.4 3.5
f = 400Hz
f = 1kHz
f = 10kHz
Input Voltage V
IN
(V)
I
OUT
= 10mA
C
OUT
= 2.2µF
Ripple Rejection RR(dB)
R1111N301B
80
70
60
50
40
30
20
10
0
f = 400Hz
f = 1kHz
f = 10kHz
IOUT = 50mA
COUT = 2.2µF
3.1 3.2 3.3 3.4 3.5
Input Voltage VIN (V)
Ripple Rejection RR(dB)
R1111N
14
10) Line Transient Response
R1111N301B
I
OUT
=30mA
tr=tf=5 µs
C
OUT
=Tantalum 1.0µF
2.8
2.9
3.0
3.1
3.2
3.3
3.4
Time t (µs)
Output Voltage V
OUT
(V)
Input Voltage V
IN
(V)
020406080100 120
0
1
6
5
4
3
2
Input Voltage
Output Voltage
R1111N301B
IOUT=30mA
tr=tf=5 µs
COUT=Tantalum 2.2µF
2.8
2.9
3.0
3.1
3.2
3.3
3.4
020406080100 120
0
1
6
5
4
3
2
Output Voltage VOUT (V)
Input Voltage VIN (V)
Time t (µs)
Input Voltage
Output Voltage
R1111N301B
I
OUT
=30mA
tr=tf=5 µs
C
OUT
=Tantalum 4.7µF
2.8
2.9
3.0
3.1
3.2
3.3
3.4
Output Voltage V
OUT
(V)
Input Voltage V
IN
(V)
020406080100 120
0
1
6
5
4
3
2
Time t (µs)
Input Voltage
Output Voltage
R1111N
15
11) Load Transient Response
R1111N301B
V
IN
=4V
C
IN
=Tantalum 1µF
C
OUT
=Tantalum 1.0µF
2.8
2.9
3.0
3.1
3.2
3.3
3.4
Time t (µs)
Output Voltage V
OUT
(V)
OutputCurrent I
OUT
(mA)
02468
10 12 14 16 18 20
-150
-100
150
100
50
0
-50
Output Current
Output Voltage
R1111N301B
VIN=4V
CIN=Tantalum 1µF
COUT=Tantalum 2.2µF
2.8
2.9
3.0
3.1
3.2
3.3
3.4
02468
10 12 14 16 18 20
-150
-100
150
100
50
0
-50
Time t (µs)
Output Voltage VOUT (V)
Output Current IOUT (mA)
Output Current
Output Voltage
R1111N301B
V
IN
=4V
C
IN
=Tantalum 1µF
C
OUT
=Tantalum 4.7µF
2.8
2.9
3.0
3.1
3.2
3.3
3.4
02468
10 12 14 16 18 20
-150
-100
150
100
50
0
-50
Time t (µs)
Output Voltage V
OUT
(V)
Output Current I
OUT
(mA)
Output Current
Output Voltage
R1111N
16
TECHNICAL NOTES
H!!!%!!>
! !! %!!!%!#K
%&!!$+$&!
!,%!!%>
V
OUT
I
OUT
V
IN
V
IN
CE
GND ESR
R1111N301B
S.A.
3
1
2
5
Ceramic Capacitor
1µF
Ceramic
Capacitor
Spectrum
Analyzer
Measuring Circuit for white noise;R1111N301B
!!+!,!$%!!#
!!!!!E1µ3+0#,!!#
+!>H!! !!!%
!!! !#7% ! !!
!!<7#,
L !!!M
+, 34E3
+(, K&!!>15858
+), >(*°
R1111N301B R1111N301B
100.0
10.0
1.0
0.1
010050 150
Output Current I
OUT
(mA)
ESR (Ω)
Ceramic 1.0µF
100.0
10.0
1.0
0.1
Output Current I
OUT
(mA)
0 10050 150
ESR (Ω)
Ceramic 2.2µF
R1111N
17
•'3!C2!%%!#% !!'!! #
•!!!%µK !3!C2#
•! !!! '!
#
TYPICAL APPLICATION
R1111Nxx1A V
OUT
OUTIN V
DD
GND
CE
Cap.
Cap.
R1111Nxx1B V
OUT
OUTIN V
DD
GND
CE
Cap.
Cap.
