R1121N421A-TL-FA [RICOH]
Fixed Positive LDO Regulator, 4.2V, 0.26V Dropout, CMOS, PDSO5, MINI, SOT-23, 5 PIN;
| 型号： | R1121N421A-TL-FA |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | Fixed Positive LDO Regulator, 4.2V, 0.26V Dropout, CMOS, PDSO5, MINI, SOT-23, 5 PIN 稳压器 |
| 文件： | 总16页 (文件大小：136K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
’99.7.13
LOW NOISE 150mA LDO REGULATOR
R1121N SERIES
■ OUTLINE
The R1121N Series are voltage regulator ICs with high output voltage accuracy, extremely low supply current, low ON-
resistance and high ripple rejection by CMOS process. Each of these voltage regulator ICs consists of a voltage reference
unit, an error amplifier, resistors, a current limit circuit, and a chip enable circuit. These ICs perform with low dropout
voltage and a chip enable function.
The line transient response and load transient response of the R1121N Series are excellent, thus these ICs are very suitable
for the power supply for hand-held communication equipment.
The output voltage of these ICs is fixed with high accuracy.
Since the package for these ICs are SOT-23-5 (Mini-mold) package, high density mounting of the ICs on boards is possible.
■ FEATURES
Ultra-Low Supply Current.................................................TYP. 35µA
Standby Mode ...................................................................TYP. 0.1µA
Low Dropout Voltage ........................................................TYP. 0.2V (IOUT = 100mA)
High Ripple Rejection.......................................................TYP. 70db (f = 1kHz)
Low Temperature-Drift Coefficient of Output Voltage .....TYP. ±100ppm/°C
Excellent Line Regulation.................................................TYP. 0.05%/V
High Accuracy Output Voltage..........................................±2.0%
Small Package ..................................................................SOT-23-5 (Mini-mold)
Output Voltage ..................................................................Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V
is possible.
Built-in chip enable circuit (2 Types; A: active “L”, B: active “H”)
Pinout ................................................................................Similar to the TK112, TK111
■ APPLICATIONS
Power source for cellular phones such as GSM, CDMA and various kind of PCSs.
Power source for domestic appliances such as cameras, VCRs and camcorders.
Power source for battery-powered equipment.
■ BLOCK DIAGRAM
R1121NXX1A
R1121NXX1B
3
1
3
1
V
DD
VOUT
V
DD
VOUT
Vref
Vref
Current Limit
Current Limit
CE
4
GND
2
CE
4
GND
2
Rev.1.11
- 1 -
■ SELECTION GUIDE
The output voltage, the active type, the packing type, and the taping type for the ICs can be selected at the user's request.
The selection can be made by designating the part number as shown below :
R1121XXX1X-XX
←Part Number
↑ ↑
↑
a b
c
Code
Contents
Setting Output Voltage (VOUT) :
Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible.
Designation of Active Type :
a
b
c
A : active “L” type
B : active “H” type
Designation of Taping Type :
Ex. TR, TL (refer to Taping Specifications; TR type is the standard direction.)
■ PIN CONFIGURATION
SOT-23-5
5
4
NC
CE
(mark side)
GND
V
OUT
V
DD
1
2
3
■ PIN DESCRIPTION
Pin No.
Symbol
VOUT
Description
1
2
3
4
5
Output pin
GND
VDD
Ground Pin
Input Pin
or CE
CE
NC
Chip Enable Pin
No Connection
Rev.1.11
- 2 -
■ ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
9
-0.3 ~ VIN+0.3
-0.3~ VIN+0.3
250
Unit
V
V
V
mW
VIN
VCE
VOUT
PD
Input Voltage
Input Voltage (CE or CE Pin)
Output Voltage
Power Dissipation
Operating Temperature
Range
Topt
Tstg
-40 ~ 85
°C
°C
Storage Temperature Range
-55 ~ 125
■ ELECTRICAL CHARACTERISTICS
●
R1121NXX1A
Symbol
Topt = 25°C
Item
Output Voltage
Conditions
VIN = Set VOUT+1V
1mA ≤ IOUT ≤ 30mA
MIN.
VOUT
×0.98
TYP.
MAX.
Unit
VOUT
×1.02
VOUT
IOUT
V
refer to the ELECTRICAL CHARACTERISTICS by OUTPUT
Output Current
VOLTAGE
VIN = Set VOUT+1V
1mA ≤ IOUT ≤ 80mA
refer to the ELECTRICAL CHARACTERISTICS by OUTPUT
VOLTAGE
Load Regulation
Dropout Voltage
12
40
mV
∆VOUT/∆IOUT
VDIF
ISS
Istandby
Supply Current
Supply Current (Standby)
VIN = Set VOUT+1V
VIN = VCE = Set VOUT+1V
35
0.1
70
1.0
µA
µA
Set VOUT+0.5V ≤ VIN ≤ 8V
IOUT = 30mA
f = 1KHz, Ripple 0.5Vp-p
VIN = Set VOUT+1V
Line Regulation
Ripple Rejection
0.05
70
0.20
%/V
dB
∆VOUT/∆VIN
RR
VIN
Input Voltage
8
V
IOUT = 30mA
-40°C ≤ Topt ≤ 85°C
VOUT = 0V
ppm
/°C
mA
Output Voltage
Temperature Coefficient
Short Current Limit
∆VOUT/∆T
±100
Ilim
RPU
50
5
Pull-up Resistance
Input Voltage “H”
Input Voltage “L”
2.5
1.5
0
10
VIN
CE
CE
CE
MΩ
VCEH
VCEL
en
V
V
0.25
Output Noise
BW = 10Hz ~ 100kHz
30
µVrms
Rev.1.11
- 3 -
●
R1121NXX1B
Symbol
Topt=25°C
Item
Conditions
VIN = Set VOUT+1V
1mA ≤ IOUT ≤ 30mA
MIN.
VOUT
×0.98
TYP.
MAX.
VOUT
×1.02
Unit
VOUT
IOUT
Output Voltage
V
refer to the ELECTRICAL CHARACTERISTICS by OUTPUT
Output Current
VOLTAGE
VIN = Set VOUT+1V
1mA ≤ IOUT ≤ 80mA
Load Regulation
12
40
mV
∆VOUT/∆IOUT
refer to the ELECTRICAL CHARACTERISTICS by OUTPUT
VOLTAGE
VDIF
ISS
Dropout Voltage
Supply Current
VIN = Set VOUT+1V
VIN = Set VOUT+1V
VCE = GND
35
70
µA
µA
Istandby
Supply Current (Standby)
0.1
1.0
Set VOUT+0.5V ≤ VIN ≤ 8V
IOUT = 30mA
f = 1KHz, Ripple 0.5Vp-p
VIN = Set VOUT+1V
Line Regulation
Ripple Rejection
0.05
70
0.20
%/V
dB
∆VOUT/∆VIN
RR
VIN
Input Voltage
Output Voltage
8
V
ppm
/°C
mA
MΩ
V
IOUT = 30mA
-40°C ≤ Topt ≤ 85°C
VOUT = 0V
∆VOUT/∆T
±100
Temperature Coefficient
Short Current Limit
CE Pull-down Resistance
CE Input Voltage “H”
CE Input Voltage “L”
Output Noise
Ilim
RPD
VCEH
VCEL
en
50
5
2.5
1.5
0
10
VIN
0.25
V
µVrms
BW = 10Hz ~ 100kHz
30
●
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt = 25°C
Output Current
Output Voltage
OUT
I
(mA)
OUT
V
(V)
Conditions
MIN.
100
150
1.5 ≤ VOUT ≤ 1.7
1.8 ≤ VOUT ≤ 5.0
VIN - VOUT = 1.0V
Topt = 25°C
Dropout Voltage
Output Voltage
DIF
V
(V)
MIN.
0.5
OUT
V
(V)
Conditions
TYP.
MAX.
1.5
1.6
1.7
0.4
0.3
0.60
0.35
0.24
0.20
0.17
1.40
0.70
0.35
0.30
0.26
1.8 ≤ VOUT ≤ 1.9
2.0 ≤ VOUT ≤ 2.4
2.5 ≤ VOUT ≤ 2.7
2.8 ≤ VOUT ≤ 3.3
3.4 ≤ VOUT ≤ 5.0
IOUT = 100mA
Note :When set Output Voltage is equal or less than 2.0V, VIN should be
equal or more than 2.0V.
Rev.1.11
- 4 -
■ OPERATION
R1121NXX1A
R1121NXX1B
3
1
3
1
V
DD
V
OUT
V
DD
V
OUT
R1
R1
Vref
Vref
R2
R2
Current Limit
Current Limit
CE
GND
CE
4
GND
4
2
2
In these ICs, fluctuation of Output Voltage, VOUT is detected by Feed-back Registers, R1 and R2, and the result is compared
with a reference voltage by Error Amplifier, so that a constant voltage is output.
A current limit circuit for protection at short mode and a chip enable circuit are included.
Rev.1.11
- 5 -
■ TEST CIRCUITS
CE
CE
4
4
V
DD
V
OUT
V
DD
V
OUT
IN
OUT
IN
OUT
3
1
3
1
R1121Nxx1B Series
R1121Nxx1B Series
I
OUT
I
SS
2.2µF
2.2µF
2
2
GND
GND
0.1µF
0.1µF
Standard test Circuit
Supply current Test
Circuit
Fig.1 Standard test Circuit
CE
Fig.2 Supply Current Test Circuit
CE
4
4
V
DD
VOUT
V
DD
VOUT
IN
OUT
IN
OUT
1
3
1
3
R1121Nxx1B Series
R1121Nxx1B Series
I
OUT
P. G
2
2
GND
GND
1µF
I1 I2
Ripple Rejection, Line
Transient Response Test Circuit
Load Transient Response
Test Circuit
Fig.3 Ripple Rejection, Line Transient Response Test
Circuit
Fig.4 Load Transient Response Test Circuit
Rev.1.11
- 6 -
■ TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
R1121N181B
R1121N301B
Topt = 25°C
Topt = 25°C
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
3.5
3.0
2.5
2.0
1.5
1.0
5.0V
4.0V
3.8V
2.8V
2.3V
3.5V
V
IN = 3.3V
V
IN = 2.1V
200
0.5
0.0
0.2
0.0
0
100
300
400
500
0
100
200
300
400
500
Output Current IOUT (mA)
Output Current IOUT (mA)
R1121N401B
R1121N501B
Topt = 25°C
Topt = 25°C
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
6.0
5.0
4.0
3.0
7.0V
6.0V
5.0V
4.5V
6.0V
5.5V
V
IN = 4.3V
2.0
1.0
0.0
V
IN = 5.3V
0.5
0.0
0
100
200
300
400
500
0
100
200
300
400
500
Output Current IOUT (mA)
Output Current IOUT (mA)
2) Output Voltage vs. Input Voltage
R1121N181B
R1121N301B
Topt = 25°C
Topt = 25°C
3.1
3.0
2.9
2.8
2.0
1.9
I
OUT=1mA
I
OUT = 1mA
1.8
1.7
1.6
1.5
1.4
2.7
2.6
2.5
30mA
30mA
1.3
1.2
50mA
2.0 3.0
Input Voltage VIN (V)
50mA
3.0
2.0
4.0
5.0
6.0
7.0
8.0
1.0
4.0
5.0
6.0
7.0
8.0
Input Voltage VIN (V)
Rev.1.11
- 7 -
R1121N401B
R1121N501B
Topt = 25°C
Topt = 25°C
4.5
4.0
3.5
5.5
5.0
4.5
4.0
3.5
I
OUT = 1mA
I
OUT = 1mA
30mA
3.0
2.5
30mA
50mA
4.0
3.0
2.5
50mA
3.0
2.0
4.0
5.0
6.0
7.0
8.0
2.0
3.0
5.0
6.0
7.0
8.0
Input Voltage VIN (V)
Input Voltage VIN (V)
3) Dropout Voltage vs. Output Current
R1121N181B
R1121N301B
1.20
0.40
0.35
0.30
0.25
0.20
0.15
0.10
1.00
Topt = 85°C
Topt = 85°C
25°C
0.80
0.60
0.40
25°C
-40°C
-40°C
0.20
0.00
0.05
0.00
0
50
100
150
0
50
100
150
Output Current IOUT (mA)
Output Current IOUT (mA)
R1121N401B
R1121N501B
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.40
0.35
0.30
0.25
0.20
0.15
0.10
Topt = 85°C
Topt = 85°C
25°C
25°C
-40°C
-40°C
0.05
0.00
0.05
0.00
0
50
100
150
0
50
100
150
Output Current IOUT (mA)
Output Current IOUT (mA)
Rev.1.11
- 8 -
4) Output Voltage vs. Temperature
R1121N181B
R1121N301B
V
IN = 4.0V
V
IN = 2.8V
I
OUT = 30mA
I
OUT = 30mA
3.10
3.08
3.06
3.04
3.02
3.00
2.98
2.96
2.94
1.90
1.88
1.86
1.84
1.82
1.80
1.78
1.76
1.74
2.92
2.90
1.72
1.70
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Temperature Topt (°C)
Temperature Topt (°C)
R1121N401B
R1121N501B
V
IN = 5.0V
V
IN = 6.0V
I
OUT = 30mA
I
OUT = 30mA
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.10
4.08
4.06
4.04
4.02
4.00
3.98
3.96
3.94
4.92
4.90
3.92
3.90
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
Tempareture Topt (°C)
Temperature Topt (°C)
5) Supply Current vs. Input Voltage
R1121N181B
R1121N301B
Topt = 25°C
Topt = 25°C
60
50
40
30
60
50
40
30
20
10
0
20
10
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
Input Voltage VIN (V)
Input Voltage VIN (V)
Rev.1.11
- 9 -
R1121N401B
R1121N501B
Topt = 25°C
Topt = 25°C
60
50
40
30
20
60
50
40
30
20
10
0
10
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
Input Voltage VIN (V)
Input Voltage VIN (V)
6) Supply Current vs. Temperature
R1121N181B
R1121N301B
V
IN = 2.8V
V
IN = 4.0V
50
45
40
35
30
50
45
40
35
30
25
20
25
20
-50
0
50
100
-50
0
50
100
Temperature Topt (°C)
Temperature Topt (°C)
R1121N401B
R1121N501B
V
IN = 5.0V
V
IN = 6.0V
50
50
45
40
35
30
45
40
35
30
25
20
25
20
-50
0
50
100
-50
0
50
100
Temperature Topt (°C)
Temperature Topt (°C)
Rev.1.11
- 10 -
7) Dropout Voltage vs. Set Output Voltage
R1121N××1B
Topt = 25°C
1.0
0.9
0.8
0.7
0.6
0.5
I
I
I
I
I
OUT = 150mA
OUT = 100mA
OUT = 50mA
OUT = 30mA
OUT = 10mA
0.4
0.3
0.2
0.1
0.0
1.0
2.0
3.0
4.0
5.0
Set Output Voltage Vreg (V)
8) Ripple Rejection vs. Frequency
R1121N181B
R1121N181B
V
IN = 2.8VDC + 0.5Vp-p
V
IN = 2.8VDC + 0.5Vp-p
C
OUT = tantal 1.0µF
C
OUT = tantal 2.2µF
80
80
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
I
OUT = 1mA
I
OUT= 1mA
I
OUT = 30mA
I
I
OUT = 30mA
OUT = 50mA
I
OUT = 50mA
0.1
1
10
100
0.1
1
10
100
Frequency f (kHz)
Frequency f (kHz)
R1121N301B
R1121N301B
V
IN = 4.0VDC + 0.5Vp-p
V
IN = 4.0VDC + 0.5Vp-p
C
OUT = tantal 1.0µF
C
OUT = tantal 2.2µF
80
80
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
I
I
I
OUT = 1mA
I
OUT = 1mA
I
OUT = 30mA
OUT = 50mA
OUT = 30mA
OUT = 50mA
I
0.1
1
10
100
0.1
1
10
100
Frequency f (kHz)
Frequency f (kHz)
Rev.1.11
- 11 -
R1121N401B
R1121N401B
V
IN = 5.0VDC + 0.5Vp-p
V
IN = 5.0VDC + 0.5Vp-p
C
OUT = tantal 1.0µF
C
OUT = tantal 2.2µF
80
80
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
I
I
I
OUT = 1mA
OUT = 30mA
OUT = 50mA
I
OUT= 1mA
I
I
OUT = 30mA
OUT = 50mA
0.1
1
10
100
0.1
1
10
100
Frequency f (kHz)
Frequency f (kHz)
9) Ripple Rejection vs. Input Voltage (DC bias)
R1121N301B
R1121N301B
I
OUT = 10mA
I
OUT = 1mA
COUT = 2.2µF
COUT = 2.2µF
80
80
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
f = 400Hz
f = 1kHz
f = 400Hz
f = 1kHz
f = 10kHz
3.4
f = 10kHz
3.1
3.2
3.3
Input Voltage VIN (V)
3.4
3.5
3.1
3.2
3.3
Input Voltage VIN (V)
3.5
R1121N301B
I
OUT = 50mA
COUT = 2.2µF
80
f = 400Hz
f = 1kHz
70
60
50
40
30
20
10
0
f = 10kHz
3.1
3.2
3.3
Input Voltage VIN (V)
3.4
3.5
Rev.1.11
- 12 -
10) Line Transient Response
R1121N301B
I
OUT=30mA
tr=tf=5 µs
COUT=Tantalum 1.0µF
3.4
3.3
3.2
6
5
4
Input Voltage
3
2
1
0
3.1
3.0
Output Voltage
2.9
2.8
0
20
40
60
80
100
120
TIme t (µs)
R1121N301B
I
OUT=30mA
tr=tf=5 µs
COUT=Tantalum 2.2µF
3.4
3.3
3.2
6
5
4
Input Voltage
3
2
1
0
3.1
3.0
Output Voltage
2.9
2.8
0
20
40
60
80
100
120
Time t (µs)
R1121N301B
I
OUT=30mA
tr=tf=5 µs
OUT=Tantalum 6.8µF
C
3.4
3.3
3.2
6
5
4
3
2
1
0
Input Voltage
3.1
3.0
Output Voltage
2.9
2.8
0
20
40
60
80
100
120
Time t (µs)
Rev.1.11
- 13 -
11) Load Transient Response
R1121N301B
V
IN=4V
CIN=Tantalum 1µF
COUT=Tantalum 1.0µF
3.4
3.3
3.2
150
100
50
Output Current
Output Voltage
0
3.1
3.0
-50
-100
-150
2.9
2.8
0
10
2
2
2
4
4
4
6
6
6
8
8
8
12
14
16
18
20
20
20
Time t (µs)
R1121N301B
V
C
C
IN=4V
IN=Tantalum 1µF
OUT=Tantalum 2.2µF
3.4
3.3
3.2
150
100
50
Output Current
Output Voltage
0
3.1
3.0
-50
-100
-150
2.9
2.8
0
10
12
14
16
18
Time t (µs)
R1121N301B
V
IN=4V
C
C
IN=Tantalum 1µF
OUT=Tantalum 6.8µF
3.4
3.3
3.2
150
100
50
Output Current
Output Voltage
0
3.1
3.0
-50
-100
-150
2.9
2.8
0
10
12
14
16
18
Time t (µs)
Rev.1.11
- 14 -
■ TECHNICAL NOTES
When using these ICs, be sure to consider following points:
In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose,
be sure to use a capacitor COUT with good frequency characteristics
and ESR (Equivalent Series Resistance) of which is in the range
described as follows:
CE
4
3
1
Vout
R1121N301B
Vin
Ceramic
Capacitor
Spectrum
Analyzer
S.A.
ESR
GND
2
Vin
Iout
Ceramic Capacitor
1µF
Measuring Circuit for white noise ; R1121N301B
The relations between IOUT (Output Current) and ESR of Output Capacitor are shown below. The conditions when the white
noise level is under 40µV (Avg.) are marked as the hatched area in the graph.
(note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation,
the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the
PCB.)
<measuring conditions>
(1) VIN = 4V
(2) Frequency band :10Hz to 1MHz
(3) Temperature : 25°C
R1121N301B
R1121N301B
Ceramic 1.0µF
Ceramic 2.2µF
100.0
10.0
100.0
10.0
1.0
1.0
0.1
0.1
0
50
100
150
0
50
100
150
Output Current IOUT (mA)
Output Current IOUT (mA)
Make VDD and GND line sufficient. When the impedance of these is high, there is a case to pick up the noise or not to
work correctly.
Connect the capacitor with a capacitance of 1µF or more between VDD and GND as close as possible.
Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest.
Rev.1.11
- 15 -
■ TYPICAL APPLICATION
CE
R1121Nxx1B
GND
CE
IN
V
DD
VOUT
OUT
IN
V
DD
V
OUT
OUT
R1121NXX1A
GND
Cap.
Cap.
Cap.
Cap.
Rev.1.11
- 16 -
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