NJM2871/A, NJM2872/A
LOW DROPOUT VOLTAGE REGULATOR
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GENERAL DESCRIPTION
The NJM2871/A, NJM2872/A are low dropout voltage
regulators designed for cellular phone application.
Advanced Bipolar technology achieves low noise, high
ripple rejection and low quiescent current.
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FEATURES
GHigh
Ripple Rejection
70dB typ. (f=1kHz)
GOutput
Noise Voltage
Vno=30µVrms (Cp=0.01µF)
GOutput
capacitor with 1.0uF ceramic capacitor (Vo≥2.7V)
GOutput
Current
Io(max.)=150mA
GHigh
Precision Output
Vo±2%
Vo±1%:A Version
GLow
Dropout Voltage
0.10V typ. (Io=60mA)
(Active High)
GON/OFF
Control
GInternal
Short Circuit Current Limit
GInternal
Thermal Overload Protection
GBipolar
Technology
MTP5 (MTP5:2.8×2.9×1.1mm)
GPackage
Outline
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PIN CONFIGURATION
1
2
3
4
5
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PACKAGE OUTLINE
NJM2871F/AF
NJM2872F/AF
NJM2871F/AF
PIN FUNCTION
1. CONTROL (Active High)
2. GND
3. NOISE BYPASS
4. V
OUT
5. V
IN
1
2
3
5
4
NJM2872F/AF
PIN FUNCTION
1.V
IN
2.GND
3.CONTROL (Active High)
4.NOISE BYPASS
5.V
OUT
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EQUIVALENT CIRCUIT
V
IN
Cont
Thermal
Protection
Noise
Bypass
V
OUT
Bandgap
Reference
GND
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OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
Device Name
2.1V
NJM287××21
NJM287××03
2.5V
NJM287××31
NJM287××25
2.6V
NJM287××26
NJM287××32
2.7V
NJM287××27
NJM287××33
2.8V
NJM287××28
NJM287××34
2.85V
NJM287××285
NJM287××35
2.9V
NJM287××29
NJM287××38
V
OUT
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
3.8V
Device Name
NJM287××04
NJM287××05
V
OUT
4.0V
5.0V
NJM2871/A, NJM2872/A
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ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
Power Dissipation
P
D
Operating Temperature
Topr
Storage Temperature
Tstg
(Ta=25°C)
RATINGS
UNIT
+14
V
+14(note 1)
V
200
mW
−40 ∼
+85
°C
−40 ∼
+125
°C
(note 1) When input voltage is less than +14V, the absolute maximum
control voltage is equal to the input voltage.
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ELECTRICAL CHARACTERISTICS
(V
IN
=Vo+1V, C
IN
=0.1µF, Co=1.0uF: Vo≥2.7V (Co=2.2uF: Vo≤2.6V), Cp=0.01µF, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Io=30mA
-2%
+2%
V
−
Output Voltage
Vo
Io=30mA, A Version
-1%
+1%
V
−
Io=0mA, expect Icont
Quiescent Current
120
180
I
Q
µA
−
Quiescent Current
V
CONT
=0V
100
nA
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Q(OFF)
−
−
at Control OFF
Output Current
Io
150
200
-
mA
Vo−0.3V
Line Regulation
0.10
%/V
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
−
−
Load Regulation
0.03 %/mA
∆Vo/∆Io
Io=0
∼
100mA
−
−
Dropout Voltage
Io=60mA
0.10
0.18
V
∆V
I−O
−
ein=200mVrms,f=1kHz, Io=10mA
Ripple Rejection
RR
70
dB
−
−
V
IN
=Vo+1V, Vo=3V Version
Average Temperature
Coefficient of Output
0.2
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
mV/°C
−
−
Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
V
NO
30
µVrms
−
−
Vo=3V Version
Control Voltage for
V
CONT(ON)
1.6
V
−
−
ON-state
Control Voltage for
V
CONT(OFF)
0.6
V
−
−
OFF-state
(note 2) The above specification is a common specification for all output voltages.
Therefore, it may be different from the individual specification for a specific output voltage.
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TEST CIRCUIT
I
IN
A
V
IN
V
IN
V
OUT
I
OUT
V
V
OUT
0.1uF
A
V
V
CONT
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CONT
CONTROL
GND
NOISE
BYPASS
1.0uF
OR
2.2uF(Vo≤2.6V)
(ceramic)
Cp=0.01uF
NJM2871/A, NJM2872/A
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TYPICAL APPLICATION
x
In case that ON/OFF Control is not required:
V
IN
V
IN
0.1uF
R
(0
∼
300kΩ)
CONTROL
GND
V
OUT
V
OUT
1.0uF
OR
2.2uF(Vo≤2.6V)
(ceramic)
NOISE
BYPASS
Cp=0.01uF
Connect control terminal to V
IN
terminal
The quiescent current can be reduced by using a resistance “R”. Instead, it increases the minimum
operating voltage. For further information, please refer to Figure “Output Voltage vs. Control Voltage”.
y
In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
V
OUT
1.0uF
OR
2.2uF(Vo
≤
2.6V)
(ceramic)
R
CONTROL
GND
NOISE
BYPASS
Cp=0.01uF
0.1uF
State of control terminal:
•“H”→
output is enabled.
•
“L” or “open”
→
output is disabled.
✱Noise
bypass Capacitance Cp
Noise bypass capacitance Cp reduces noise generated by band-gap reference circuit.
Noise level and ripple rejection will be improved when larger Cp is used.
Use of smaller Cp value may cause oscillation.
Use the Cp value of 0.01uF greater to avoid the problem.
NJM2871/A, NJM2872/A
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ELECTRICAL CHARACTERISTICS
NJM2871/A, NJM2872/A
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ELECTRICAL CHARACTERISTICS
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