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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PACKAGE OUTLINE
NJM2871F/AF
NJM2872F/AF
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FEATURES
qHigh
Ripple Rejection
70dB typ. (f=1kHz)
qOutput
Noise Voltage
Vno=30µVrms (Cp=0.01µF)
qOutput
capacitor with 1.0uF ceramic capacitor (Vo≥2.7V)
qOutput
Current
Io(max.)=150mA
qHigh
Precision Output
Vo±2%
Vo±1%:A Version
qLow
Dropout Voltage
0.10V typ. (Io=60mA)
qON/OFF
Control
(Active High)
qOperating
Voltage Range +2.5V∼+14V (Vo≤2.0V version)
qInternal
Short Circuit Current Limit
qInternal
Thermal Overload Protection
qBipolar
Technology
qPackage
Outline
MTP5 (MTP5:2.8×2.9×1.1mm)
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PIN CONFIGURATION
1
2
3
4
5
NJM2871F/AF
PIN FUNCTION
5
1. CONTROL (Active High)
1
2
2. GND
3. NOISE BYPASS
3
4
4. V
OUT
5. V
IN
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
V
OUT
Noise
Bypass
Bandgap
Reference
GND
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
(Vo>2.0V version : 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
I
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
Ta=0∼85°C, Io=10mA,
0.2
∆Vo/∆Ta
mV/°C
−
−
Coefficient of Output Voltage
Vo=3V Version
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
V
NO
30
µVrms
−
−
Vo=3V Version
Control Voltage for ON-state V
CONT(ON)
1.6
V
−
−
Control Voltage for OFF-state V
CONT(OFF)
0.6
V
−
−
(Vo≤2.0V version : V
IN
=Vo+1V, C
IN
=0.1µF, Co=4.7uF, Cp=0.01µF, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
Io=30mA
Output Voltage
Vo
Io=30mA, A Version
Io=0mA, expect Icont
Quiescent Current
I
Q
Quiescent Current
V
CONT
=0V
I
Q(OFF)
at Control OFF
Output Current
Io
Vo−0.3V
Line Regulation
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
Load Regulation
∆Vo/∆Io
Io=0
∼
100mA
ein=200mVrms,f=1kHz, Io=10mA
Ripple Rejection
RR
V
IN
=Vo+1V, Vo=1.8V Version
Average Temperature
Ta=0∼85°C, Io=10mA,
∆Vo/∆Ta
Coefficient of Output Voltage
Vo=1.8V Version
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
V
NO
Vo=1.8V Version
Control Voltage for ON-state V
CONT(ON)
Control Voltage for OFF-state V
CONT(OFF)
MIN.
-2%
-1%
−
−
150
−
−
−
−
−
TYP.
−
−
120
−
200
−
−
75
0.13
22
MAX.
+2%
+1%
180
100
-
0.10
0.03
−
−
−
UNIT
V
V
µA
nA
mA
%/V
%/mA
dB
mV/°C
µVrms
V
V
1.6
−
−
0.6
−
−
(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.
NJM2871/A, NJM2872/A
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OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
Device Name
1.5V
NJM287××15
NJM287××285
1.8V
NJM287××29
NJM287××18
2.1V
NJM287××03
NJM287××21
2.5V
NJM287××31
NJM287××25
2.6V
NJM287××26
NJM287××32
2.7V
NJM287××27
NJM287××33
2.8V
NJM287××28
NJM287××34
V
OUT
2.85V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
Device Name
NJM287××35
NJM287××38
NJM287××04
NJM287××05
V
OUT
3.5V
3.8V
4.0V
5.0V
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TEST CIRCUIT
A
V
IN
I
IN
V
IN
V
OUT
I
OUT
0.1uF
1.0uF
(ceramic)
*note1
V
V
OUT
A
V
V
CONT
I
CONT
CONTROL
GND
NOISE
BYPASS
Cp=0.01uF
*note1
2.0V < Vo
≤
2.6V version : Co=2.2uF(ceramic)
Vo
≤
2.0V version : Co=4.7uF(ceramic)
NJM2871/A, NJM2872/A
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TYPICAL APPLICATION
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In case that ON/OFF Control is not required:
V
IN
V
IN
0.1uF
V
OUT
V
OUT
1.0uF
*note1
(ceramic)
R
(0
∼
300kΩ)
CONTROL
GND
NOISE
BYPASS
Cp=0.01uF
*
note1 2.0V < Vo
≤
2.6V version : Co=2.2uF(ceramic)
Vo
≤
2.0V version : Co=4.7uF(ceramic)
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”.
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In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
V
OUT
0.1uF
R
CONTROL
GND
NOISE
BYPASS
1.0uF
*note1
(ceramic)
Cp=0.01uF
*
note1 2.0V < Vo
≤
2.6V version : Co=2.2uF(ceramic)
Vo
≤
2.0V version : Co=4.7uF(ceramic)
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
汽车电子
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