NJRC NJM2871AF Low dropout voltage regulator Datasheet

NJM2871/A, NJM2872/A
LOW DROPOUT VOLTAGE REGULATOR
■ 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.
■ PACKAGE OUTLINE
NJM2871F/AF
NJM2872F/AF
■ FEATURES
●High Ripple Rejection
70dB typ. (f=1kHz)
●Output Noise Voltage
Vno=30µVrms (Cp=0.01µF)
●Output capacitor with 1.0uF ceramic capacitor (Vo≥2.7V)
●Output Current
Io(max.)=150mA
●High Precision Output
Vo±2%
Vo±1%:A Version
●Low Dropout Voltage
0.10V typ. (Io=60mA)
●ON/OFF Control
(Active High)
●Operating Voltage Range +2.5V∼+14V (Vo≤2.0V version)
●Internal Short Circuit Current Limit
●Internal Thermal Overload Protection
●Bipolar Technology
●Package Outline
MTP5 (MTP5:2.8×2.9×1.1mm)
■ PIN CONFIGURATION
1
5
2
3
4
NJM2871F/AF
PIN FUNCTION
5
1. CONTROL (Active High) 1
2
2. GND
3. NOISE BYPASS
3
4
4. VOUT
5. VIN
NJM2872F/AF
PIN FUNCTION
1.VIN
2.GND
3.CONTROL (Active High)
4.NOISE BYPASS
5.VOUT
■ EQUIVALENT CIRCUIT
VOUT
VIN
Cont
Thermal
Protection
Noise
Bypass
Bandgap
Reference
GND
NJM2871/A, NJM2872/A
■ ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
VIN
Control Voltage
VCONT
Power Dissipation
PD
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.
■ ELECTRICAL CHARACTERISTICS
(Vo>2.0V version : VIN=Vo+1V, CIN=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
IQ
µA
−
Quiescent Current
VCONT=0V
100
nA
IQ(OFF)
−
−
at Control OFF
Output Current
Io
150
200
mA
Vo−0.3V
Line Regulation
0.10 %/V
∆Vo/∆VIN VIN=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
∆VI−O
−
ein=200mVrms,f=1kHz, Io=10mA
Ripple Rejection
RR
70
dB
−
−
VIN=Vo+1V, Vo=3V Version
Average Temperature
Ta=0∼85°C, Io=10mA,
0.2
mV/°C
−
−
Coefficient of Output Voltage ∆Vo/∆Ta Vo=3V Version
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
VNO
30
µVrms
−
−
Vo=3V Version
Control Voltage for ON-state VCONT(ON)
1.6
V
−
−
Control Voltage for OFF-state VCONT(OFF)
0.6
V
−
−
(Vo≤2.0V version : VIN=Vo+1V, CIN=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
IQ
Quiescent Current
VCONT=0V
IQ(OFF)
at Control OFF
Output Current
Io
Vo−0.3V
Line Regulation
∆Vo/∆VIN VIN=Vo+1V ∼ Vo+6V, Io=30mA
Load Regulation
∆Vo/∆Io
Io=0 ∼ 100mA
ein=200mVrms,f=1kHz, Io=10mA
Ripple Rejection
RR
VIN=Vo+1V, Vo=1.8V Version
Average Temperature
Ta=0∼85°C, Io=10mA,
Coefficient of Output Voltage ∆Vo/∆Ta Vo=1.8V Version
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
VNO
Vo=1.8V Version
Control Voltage for ON-state VCONT(ON)
Control Voltage for OFF-state VCONT(OFF)
MIN.
-2%
-1%
−
TYP.
−
−
120
MAX.
+2%
+1%
180
UNIT
V
V
µA
−
−
100
nA
150
−
−
200
−
−
0.10
0.03
mA
%/V
%/mA
−
75
−
dB
−
0.13
−
mV/°C
−
22
−
µVrms
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.
V
V
NJM2871/A, NJM2872/A
■ OUTPUT VOLTAGE RANK LIST
Device Name
VOUT
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
VOUT
2.85V
2.9V
3.0V
3.1V
Device Name
NJM287××35
NJM287××38
NJM287××04
NJM287××05
VOUT
3.5V
3.8V
4.0V
5.0V
3.2V
3.3V
3.4V
■ TEST CIRCUIT
A
IIN
VIN
VOUT
IOUT
VIN
1.0uF *note1
(ceramic)
0.1uF
A
ICONT
CONTROL
NOISE
BYPASS
Cp=0.01uF
V
VCONT
GND
*note1 2.0V < Vo ≤ 2.6V version : Co=2.2uF(ceramic)
Vo ≤ 2.0V version : Co=4.7uF(ceramic)
V
VOUT
NJM2871/A, NJM2872/A
■ TYPICAL APPLICATION
① In case that ON/OFF Control is not required:
VIN
VIN
VOUT
VOUT
0.1uF
1.0uF *note1
(ceramic)
R
(0∼300kΩ)
NOISE
BYPASS
CONTROL
Cp=0.01uF
GND
*note1 2.0V < Vo ≤ 2.6V version : Co=2.2uF(ceramic)
Vo ≤ 2.0V version : Co=4.7uF(ceramic)
Connect control terminal to VIN 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”.
② In use of ON/OFF CONTROL:
VIN
VIN
VOUT
VOUT
1.0uF *note1
(ceramic)
0.1uF
R
CONTROL
NOISE
BYPASS
GND
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
■ ELECTRICAL CHARACTERISTICS
NJM2871/A, NJM2872/A
■ ELECTRICAL CHARACTERISTICS
NJM2871/A, NJM2872/A
■ ELECTRICAL CHARACTERISTICS
NJM2871/A, NJM2872/A
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
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