R1122N SERIES
LOW NOISE 150mA LDO REGULATOR
NO.EA-060-111027
OUTLINE
The R1122N Series are CMOS-based voltage regulator ICs with high output voltage accuracy, extremely low
supply current, low ON-resistance, and high Ripple Rejection. 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 R1122N 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 is SOT-23-5
(Mini-mold) package , high density mounting of the ICs on boards is possible.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
Supply Current ................................................................ Typ. 100μA
Standby Mode Current .................................................. Typ. 0.1μA
Dropout Voltage .............................................................. Typ. 0.19V (IOUT=100mA 3.0V Output type)
Ripple Rejection.............................................................. Typ. 80dB(f=1kHz)
Temperature-Drift Coefficient of Output Voltage ............. Typ. ±100ppm/°C
Line Regulation ............................................................... Typ. 0.05%/V
Output Voltage Accuracy................................................. ±2.0%
Output Voltage Range..................................................... 1.5V to 5.0V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
Package ........................................................................ SOT-23-5 (Mini-mold)
Built-in chip enable circuit ( 2 types; A: active “Low”, B: active “High”)
Built-in fold-back protection circuit .................................. Short Current Typ.30mA
Pin-out............................................................................. Similar to the TK112,TK111
Ceramic Capacitors Recommended to be used with this IC
APPLICATIONS
• Power source for cellular phones such as GSM, CDMA, PCS and so forth.
• Power source for domestic appliances such as cameras, VCRs and camcorders.
• Power source for battery-powered equipment.
1
R1122N
BLOCK DIAGRAM
R1122Nxx1A
R1122Nxx1B
3
3
1
VDD
VOUT
VOUT
_
_
+
+
Vref
Vref
GND
Current Limit
CE
1
VDD
2
4
GND
Current Limit
CE
2
4
SELECTION GUIDE
The output voltage, the active type for the ICs can be selected at the user's request.
Product Name
R1122Nxx1∗-TR-FE
Package
Quantity per Reel
Pb Free
Halogen Free
SOT-23-5
3,000 pcs
Yes
Yes
xx : The output voltage can be designated in the range from 1.5V(15) to 5.0V(50) in 0.1V steps.
(For other voltages, please refer to MARK INFORMATIONS.)
∗ : Designation of Active Type.
(A) "L" active
(B) "H" active
2
R1122N
PIN CONFIGURATION
SOT-23-5
5
4
(mark side)
1
2
3
PIN DESCRIPTION
Pin No
Symbol
Description
1
VOUT
Output pin
2
GND
Ground Pin
3
VDD
4
CE or CE
Chip Enable Pin
5
NC
No Connection
Input Pin
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
Unit
7.0
V
VIN
Input Voltage
VCE
Input Voltage( CE or CE Pin)
-0.3 ~ VIN+0.3
V
VOUT
Output Voltage
-0.3 ~ VIN+0.3
V
IOUT
Output Current
200
mA
PD
Power Dissipation (SOT-23-5) ∗
420
mW
Topt
Operating Temperature Range
-40 ~ 85
°C
Tstg
Storage Temperature Range
-55 ~ 125
°C
∗) For Power Dissipation, please refer to PACKAGE INFORMATION.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damages and may degrade the life time and safety for both device and system using the device
in the field.
The functional operation at or over these absolute maximum ratings is not assured.
3
R1122N
ELECTRICAL CHARACTERISTICS
•
R1122Nxx1A
Symbol
Topt=25°C
Item
Conditions
Min.
Typ.
Max.
Unit
VOUT
×1.02
V
VOUT
Output Voltage
VIN = Set VOUT + 1V
1mA <
= IOUT <
= 30mA
IOUT
Output Current
VIN = Set VOUT + 1V
When VOUT = Set VOUT -0.1V
ΔVOUT/ΔIOUT
Load Regulation
VIN = Set VOUT + 1V
1mA <
= IOUT <
= 80mA
VDIF
Dropout Voltage
ISS
Supply Current
VIN = Set VOUT + 1V
100
170
μA
Supply Current (Standby)
VIN = VCE = Set VOUT + 1V
0.1
1.0
μA
ΔVOUT/ΔVIN
Line Regulation
Set VOUT+0.5V <
= VIN <
= 6.0V
IOUT = 30mA
0.05
0.20
%/V
RR
Ripple Rejection
f = 1kHz, Ripple 0.5Vp-p
VIN = Set VOUT + 1V
VIN
Input Voltage
Istandby
ΔVOUT/
ΔTopt
VOUT
×0.98
150
12
80
2.0
IOUT = 30mA
−40°C <
= Topt <
= 85°C
ISC
Short Current Limit
VOUT = 0V
RPU
CE Pull-up Resistance
2.5
VCEH
CE Input Voltage “H”
VCEL
CE Input Voltage “L”
Output Noise
40
mV
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Output Voltage
Temperature Coefficient
en
mA
BW=10Hz to 100kHz
dB
6.0
V
±100
ppm/°C
30
mA
5.0
10.0
MΩ
1.5
VIN
V
0.00
0.25
V
30
μVrms
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or surge. And the semiconductor devices may receive serious damage when they continue
to operate over the recommended operating conditions.
4
R1122N
•
R1122Nxx1B
Symbol
Topt=25°C
Item
Conditions
VOUT
Output Voltage
VIN = Set VOUT + 1V
1mA <
= IOUT <
= 30mA
IOUT
Output Current
VIN = Set VOUT + 1V
When VOUT = Set VOUT -0.1V
ΔVOUT/ΔIOUT
Load Regulation
VIN = Set VOUT + 1V
1mA <
= IOUT <
= 80mA
VDIF
Dropout Voltage
ISS
Supply Current
Istandby
Supply Current (Standby)
ΔVOUT/ΔVIN
Line Regulation
RR
Ripple Rejection
VIN
Input Voltage
ΔVOUT/
ΔTopt
Min.
Unit
VOUT
×1.02
V
mA
12
40
mV
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
VIN = Set VOUT + 1V
VIN = Set VOUT + 1V
VCE =GND
Set VOUT + 0.5V <
= VIN <
= 6.0V
IOUT = 30mA
f = 1kHz, Ripple 0.5Vp-p
VIN = Set VOUT + 1V
100
170
μA
0.1
1.0
μA
0.05
0.20
%/V
80
2.0
IOUT = 30mA
−40°C <
= Topt <
= 85°C
ISC
Short Current Limit
VOUT = 0V
RPD
CE Pull-down Resistance
2.5
VCEH
CE Input Voltage “H”
VCEL
CE Input Voltage “L”
Output Noise
Max.
150
Output Voltage
Temperature Coefficient
en
Typ.
VOUT
×0.98
BW=10Hz to 100kHz
dB
6.0
V
±100
ppm/°C
30
mA
10.0
MΩ
1.5
VIN
V
0.00
0.25
V
5.0
30
μVrms
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or surge. And the semiconductor devices may receive serious damage when they continue
to operate over the recommended operating conditions.
5
R1122N
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt = 25°C
Output Voltage
VOUT (V)
1.5
1.7
1.9
2.4
2.8
<
=
<
=
<
=
<
=
<
=
VOUT
VOUT
VOUT
VOUT
VOUT
<
=
<
=
<
=
<
=
<
=
1.6
1.8
2.3
2.7
5.0
Dropout Voltage
VDIF (V)
Condition
Typ.
0.32
0.28
IOUT = 100mA
0.25
0.20
0.19
Max.
0.55
0.47
0.35
0.29
0.26
OPERATION
R1122Nxx1A
3
R1122Nxx1B
1
VDD
3
VOUT
1
VDD
VOUT
_
_
+
+
R1
Vref
Vref
Current Limit
CE
4
R1
R2
2
GND
Current Limit
CE
4
R2 GND
2
In these ICs, fluctuation of the output voltage, VOUT is detected by feed-back registers R1, R2, and the result is
compared with a reference voltage by the 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.
6
R1122N
TEST CIRCUITS
CE
CE
4
IN
VDD
3
4
VOUT
R1122Nxx1B
Series
IN
OUT
VDD
3
1
IOUT
VOUT
R1122Nxx1B
Series
ISS
2
2
GND
2.2μF
GND
2.2μF
Fig.1 Standard test Circuit
Fig.2 Supply Current Test Circuit
CE
CE
4
4
IN
VDD
3
VOUT
R1122Nxx1B
Series
OUT
1
IN
VDD
3
VOUT
R1122Nxx1B
Series
OUT
1
IOUT
IOUT
P.G
OUT
1
2
2
GND
Fig.3 Ripple Rejection, Line Transient
Response Test Circuit
2.2μF
GND
I1
I2
Fig.4 Load Transient Response Test Circuit
7
R1122N
TECHNICAL NOTES
When using these ICs, consider the following points:
Phase Compensation
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).
(Note: When the additional ceramic capacitors are connected to the output pin with the output capacitor for
phase compensation, the operation might be unstable. Because of this, test these ICs with the same external
components as the ones to be used on the PCB.)
Recommended Capacitors ; GRM40X5R225K6.3 (Murata)
GRM40-034X5R335K6.3 (Murata)
GRM40-034X5R475K6.3 (Murata)
PCB Layout
Make VDD and GND lines sufficient. If their impedance is high, picking up the noise or unstable operation may
result. Connect a capacitor with a capacitance of 2.2μF or more between VDD and GND pin as close as possible.
Set external components, especially output capacitor as close as possible to the ICs and make wiring as short
as possible.
TYPICAL APPLICATION
CE
CE
IN
VDD
R1122Nxx1A
Series
+
Cap.
VOUT
OUT
+
GND
Cap.
IN
VDD
R1122Nxx1B
Series
VOUT
+
Cap.
+
GND
(External Components)
Output Capacitor ; Ceramic 2.2μF (Set output voltage in the range from 2.5 to 5.0V)
Ceramic 4.7μF (Set output voltage in the range from 1.5 to 2.5V)
Input Capacitor ; Ceramic 2.2μF
8
OUT
Cap.
R1122N
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
R1122N151B
R1122N201B
2.5
1.8
Output Voltage VOUT(V)
Output Voltage VOUT(V)
1.6
1.4
VIN=2.0V
VIN=2.5V
VIN=3.5V
1.2
1
0.8
0.6
0.4
2
VIN=2.3V
1.5
VIN=2.5V
VIN=3.0V
VIN=4.0V
1
0.5
0.2
0
0
0
100
200
300
400
0
500
R1122N301B
200
300
400
500
R1122N401B
3.5
5
3
Output Voltage VOUT(V)
Output Voltage VOUT(V)
100
Output Current IOUT(mA)
Output Current IOUT(mA)
2.5
VIN=3.3V
2
VIN=3.5V
VIN=4.0V
1.5
VIN=5.0V
1
0.5
0
4
VIN=4.3V
3
VIN=4.5V
VIN=5.0V
VIN=6.0V
2
1
0
0
100
200
300
400
500
Output Current IOUT(mA)
0
100
200
300
400
500
Output Current IOUT(mA)
R1122N501B
Output Voltage VOUT(V)
6
5
4
VIN=5.3V
VIN=5.5V
3
VIN=6.0V
VIN=7.0V
2
1
0
0
100
200
300
400
500
Output Current IOUT(mA)
9
R1122N
2) Output Voltage vs. Input Voltage
R1122N201B
2.100
1.500
2.000
Output Voltage VOUT(V)
Output Voltage VOUT(V)
R1122N151B
1.600
1.400
1.300
1.200
IOUT=1mA
IOUT=30mA
IOUT=50mA
1.100
1.000
1.900
1.800
1.700
IOUT=1mA
IOUT=30mA
IOUT=50mA
1.600
1.500
1
2
3
4
5
6
7
1
2
3
Input Voltage VIN(V)
R1122N301B
3.000
Output Voltage VOUT(V)
Output Voltage VOUT(V)
6
7
4.500
2.900
2.800
2.700
IOUT=1mA
IOUT=30mA
IOUT=50mA
2.600
2.500
4.000
3.500
3.000
IOUT=1mA
IOUT=30mA
IOUT=50mA
2.500
2
3
4
5
6
7
Input Voltage VIN(V)
R1122N501B
5.000
4.500
4.000
3.500
IOUT=1mA
IOUT=30mA
IOUT=50mA
3.000
2.500
2
3
4
5
Input Voltage VIN(V)
2
3
4
5
Input Voltage VIN(V)
5.500
Output Voltage VOUT(V)
5
R1122N401B
3.100
10
4
Input Voltage VIN(V)
6
7
6
7
R1122N
3) Dropout Voltage vs. Output Current
R1122N151B
R1122N201B
0.600
0.500
Topt=-40°C
Topt=25°C
Topt=85°C
0.400
Dropout Voltage VDIF(V)
Dropout Voltage VDIF(V)
0.600
0.300
0.200
0.100
0.000
0.500
Topt=-40°C
Topt=25°C
Topt=85°C
0.400
0.300
0.200
0.100
0.000
0
50
100
150
0
Output Current IOUT(mA)
R1122N301B
100
150
R1122N401B
0.600
0.600
0.500
Topt=-40°C
Topt=25°C
Topt=85°C
0.400
Dropout Voltage VDIF(V)
Dropout Voltage VDIF(V)
50
Output Current IOUT(mA)
0.300
0.200
0.100
0.000
0.500
Topt=-40°C
Topt=25°C
Topt=85°C
0.400
0.300
0.200
0.100
0.000
0
50
100
150
Output Current IOUT(mA)
0
50
100
150
Output Current IOUT(mA)
R1122N501B
Dropout Voltage VDIF(V)
0.600
0.500
Topt=-40°C
Topt=25°C
Topt=85°C
0.400
0.300
0.200
0.100
0.000
0
50
100
150
Output Current IOUT(mA)
11
R1122N
4) Output Voltage vs. Temperature
R1122N151A/B
R1122N201A/B
VIN=2.5V CIN=1μF
COUT=2.2μF IOUT=30mA
VIN=3.0V CIN=1μF
COUT=2.2μF IOUT=30mA
1.53
2.10
Output VoltageVOUT(V)
Output VoltageVOUT(V)
2.08
1.52
1.51
1.50
1.49
1.48
2.06
2.04
2.02
2.00
1.98
1.96
1.94
1.92
1.47
1.90
-50
-25
0
25
50
Temperature Topt (°C)
75
100
-50
R1122N301A/B
100
4.08
4.06
3.04
Output VoltageVOUT(V)
Output VoltageVOUT(V)
75
VIN=5.0V CIN=1μF
COUT=2.2μF IOUT=30mA
3.06
3.02
3.00
2.98
2.96
4.04
4.02
4.00
3.98
3.96
3.94
3.92
2.94
-50
-25
0
25
50
Temperature Topt (°C)
75
100
R1122N501A/B
VIN=6.0V CIN=1μF
COUT=2.2μF IOUT=30mA
5.10
5.08
Output VoltageVOUT(V)
0
25
50
Temperature Topt (°C)
R1122N401A/B
VIN=4.0V CIN=1μF
COUT=2.2μF IOUT=30mA
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
-50
12
-25
-25
0
25
50
Temperature Topt (°C)
75
100
-50
-25
0
25
50
Temperature Topt (°C)
75
100
R1122N
5) Supply Current vs. Input Voltage
R1122N151B
R1122N201B
120
Supply Current ISS (μA)
Supply Current ISS (μA)
120
100
80
60
40
100
80
60
40
20
20
0
0
1
2
3
4
5
Input Voltage VIN (V)
6
1
7
2
R1122N301B
6
7
6
7
R1122N401B
120
Supply Current ISS (μA)
120
Supply Current ISS (μA)
3
4
5
Input Voltage VIN (V)
100
80
60
40
20
100
80
60
40
20
0
0
1
2
3
4
5
Input Voltage VIN (V)
6
7
6
7
1
2
3
4
5
Input Voltage VIN (V)
R1122N501B
Supply Current ISS (μA)
120
100
80
60
40
20
0
1
2
3
4
5
Input Voltage VIN (V)
13
R1122N
6) Supply Current vs. Temperature
R1122N151A/B
150
100
50
0
-50
-25
50
75
0
25
Temperature Topt (°C)
VIN=3.0V CIN=1μF
COUT=2.2μF
200
Supply Current ISS (μA)
200
Supply Current ISS (μA)
R1122N201A/B
VIN=2.5V CIN=1μF
COUT=2.2μF
150
100
50
0
-50
100
-25
R1122N301A/B
100
50
-25
50
75
0
25
Temperature Topt (°C)
100
R1122N501A/B
VIN=6.0V CIN=1μF
COUT=2.2μF
Supply Current ISS (μA)
200
150
100
50
0
-50
14
-25
50
75
0
25
Temperature Topt (°C)
100
VIN=5.0V CIN=1μF
COUT=2.2μF
200
Supply Current ISS (μA)
Supply Current ISS (μA)
150
0
-50
100
R1122N401A/B
VIN=4.0V CIN=1μF
COUT=2.2μF
200
50
75
0
25
Temperature Topt (°C)
150
100
50
0
-50
-25
50
75
0
25
Temperature Topt (°C)
100
R1122N
7) Ripple Rejection vs. Frequency
R1122N151A/B
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0.1
90.00
Ripple Rejection RR (dB)
Ripple Rejection RR (dB)
90.00
R1122N201A/B
VIN=2.5V+0.5Vp-p
COUT=2.2μF IOUT=30mA
10
1
Frequency Freq (kHz)
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0.1
100
R1122N301A/B
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0.1
10
1
Frequency Freq (kHz)
10
1
Frequency Freq (kHz)
100
R1122N401A/B
VIN=4.0V+0.5Vp-p
COUT=2.2μF IOUT=30mA
90.00
Ripple Rejection RR (dB)
Ripple Rejection RR (dB)
90.00
VIN=3.0V+0.5Vp-p
COUT=2.2μF IOUT=30mA
100
VIN=5.0V+0.5Vp-p
COUT=2.2μF IOUT=30mA
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0.1
10
1
Frequency Freq (kHz)
100
R1122N501A/B
Ripple Rejection RR (dB)
90.00
VIN=6.0V+0.5Vp-p
COUT=2.2μF IOUT=30mA
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0.1
10
1
Frequency Freq (kHz)
100
15
R1122N
8) Ripple Rejection vs. Input Voltage (DC bias)
R1122N301B
80.00
70.00
60.00
50.00
40.00
30.00
f=400Hz
f=1kHz
f=10kHz
20.00
10.00
0.00
3.10
3.50
3.20
3.30
3.40
Input Voltage VIN (V)
90.00
Ripple Rejection RR (dB)
90.00
Ripple Rejection RR (dB)
R1122N301B
COUT=Ceramic 2.2μF
IOUT=1mA
COUT=Ceramic 2.2μF
IOUT=10mA
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
3.10
f=400Hz
f=1kHz
f=10kHz
3.20
3.30
3.40
Input Voltage VIN (V)
3.50
R1122N301B
COUT=Ceramic 2.2μF
IOUT=50mA
Ripple Rejection RR (dB)
90.00
80.00
70.00
60.00
50.00
40.00
30.00
f=400Hz
f=1kHz
f=10kHz
20.00
10.00
0.00
3.10
3.20
3.30
3.40
Input Voltage VIN (V)
3.50
9) Input Transient Response
R1122N501B
Topt=25°C
Tek Run : 2.50MS/s Average
VIN
1→
2→
VOUT
Ch1
Ch1
16
VIN=2.5V↔3.5V
IOUT=30mA
CIN=none
COUT=2.2μF
tr/tf=5μs
1.00V
Ch2 20.0mV
M20.0μs
R1122N
R1122N201B
Topt=25°C
Tek Run : 2.50MS/s Average
VIN
1→
2→
VIN=3.0V↔4.0V
IOUT=30mA
CIN=none
COUT=2.2μF
tr/tf=5μs
VOUT
Ch1
1.00V
Ch2 20.0mV
M20.0μs
R1122N301B
Topt=25°C
Tek Run : 2.50MS/s Average
VIN
1→
2→
VIN=4.0V↔5.0V
IOUT=30mA
CIN=none
COUT=2.2μF
tr/tf=5μs
VOUT
Ch1
1.00V
Ch2 20.0mV
M20.0μs
R1122N401B
Topt=25°C
Tek Run : 2.50MS/s Average
VIN
1→
2→
VIN=5.0V↔6.0V
IOUT=30mA
CIN=none
COUT=2.2μF
tr/tf=5μs
VOUT
Ch1
1.00V
Ch2 20.0mV
M20.0μs
17
R1122N
R1122N501B
Topt=25°C
Tek Run : 2.50MS/s Average
VIN
1→
2→
VIN=6.0V↔7.0V
IOUT=30mA
CIN=none
COUT=2.2μF
tr/tf=5μs
VOUT
Ch1
1.00V
Ch2 20.0mV
M20.0μs
10) Load Transient Response
R1122N151B
Topt=25°C
Tek Run : 2.50MS/s Average
1→
IOUT
IOUT=50mA↔100mA
VIN=2.5V
CIN=2.2μF
COUT=2.2μF
tr/tf=5μs
VOUT
2→
Ch1 500mV
Ch2 50.0mV
M20.0μs
R1122N201B
Topt=25°C
Tek Run : 2.50MS/s Average
1→
IOUT
IOUT=50mA↔100mA
VIN=3.0V
CIN=2.2μF
COUT=2.2μF
tr/tf=5μs
VOUT
2→
Ch1 500mV
18
Ch2 50.0mV
M20.0μs
R1122N
R1122N301B
Topt=25°C
Tek Run : 2.50MS/s Average
1→
IOUT
IOUT=50mA↔100mA
VIN=4.0V
CIN=2.2μF
COUT=2.2μF
tr/tf=5μs
VOUT
2→
Ch1 500mV
Ch2 50.0mV
M20.0μs
R1122N401B
Topt=25°C
Tek Run : 2.50MS/s Average
1→
IOUT
IOUT=50mA↔100mA
VIN=5.0V
CIN=2.2μF
COUT=2.2μF
tr/tf=5μs
VOUT
2→
Ch1 500mV
Ch2 50.0mV
M20.0μs
R1122N501B
Topt=25°C
Tek Run : 2.50MS/s Average
1→
IOUT
IOUT=50mA↔100mA
VIN=6.0V
CIN=2.2μF
COUT=2.2μF
tr/tf=5μs
VOUT
2→
Ch1 500mV
Ch2 50.0mV
M20.0μs
19
R1122N
TECHNICAL NOTES
4 CE
VOUT1 1
R1122Nxx1B
VIN
Ceramic
Cap.
Spectrum
Analyzer
3 VDD
GND
Ceramic
Cap.
S.A
ESR
2
IOUT
Measuring Circuit for white noise; R1122N301B
The relationship between IOUT (output current) and ESR of the output capacitor is shown in the graphs below.
The conditions when the white noise level is under 40μV (Avg.) are indicated by the hatched area in the graph.
(Note: When additional ceramic capacitors are connected to the output pin with the output capacitor for phase
compensation, operation might be unstable. Because of this, test these ICs with the same external components
as the ones to be used on the PCB.)
(1)VIN=VOUT+1V
(2)Frequency band: 10Hz to 1MHz
(3)Temperature: 25°C
20
1. The products and the product specifications described in this document are subject to change or discontinuation of
production without notice for reasons such as improvement. Therefore, before deciding to use the products, please
refer to Ricoh sales representatives for the latest information thereon.
2. The materials in this document may not be copied or otherwise reproduced in whole or in part without prior written
consent of Ricoh.
3. Please be sure to take any necessary formalities under relevant laws or regulations before exporting or otherwise
taking out of your country the products or the technical information described herein.
4. The technical information described in this document shows typical characteristics of and example application circuits
for the products. The release of such information is not to be construed as a warranty of or a grant of license under
Ricoh's or any third party's intellectual property rights or any other rights.
5. The products listed in this document are intended and designed for use as general electronic components in standard
applications (office equipment, telecommunication equipment, measuring instruments, consumer electronic products,
amusement equipment etc.). Those customers intending to use a product in an application requiring extreme quality
and reliability, for example, in a highly specific application where the failure or misoperation of the product could result
in human injury or death (aircraft, spacevehicle, nuclear reactor control system, traffic control system, automotive and
transportation equipment, combustion equipment, safety devices, life support system etc.) should first contact us.
6. We are making our continuous effort to improve the quality and reliability of our products, but semiconductor products
are likely to fail with certain probability. In order to prevent any injury to persons or damages to property resulting from
such failure, customers should be careful enough to incorporate safety measures in their design, such as redundancy
feature, fire containment feature and fail-safe feature. We do not assume any liability or responsibility for any loss or
damage arising from misuse or inappropriate use of the products.
7. Anti-radiation design is not implemented in the products described in this document.
8. The X-ray exposure can influence functions and characteristics of the products. Confirm the product functions and
characteristics in the evaluation stage.
9. WLCSP products should be used in light shielded environments. The light exposure can influence functions and
characteristics of the products under operation or storage.
10. There can be variation in the marking when different AOI (Automated Optical Inspection) equipment is used. In the
case of recognizing the marking characteristic with AOI, please contact Ricoh sales or our distributor before attempting
to use AOI.
11. Please contact Ricoh sales representatives should you have any questions or comments concerning the products or
the technical information.
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Ricoh is committed to reducing the environmental loading materials in electrical devices
with a view to contributing to the protection of human health and the environment.
Ricoh has been providing RoHS compliant products since April 1, 2006 and Halogen-free products since
April 1, 2012.
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