NJM2870
LOW DROPOUT VOLTAGE REGULATOR
s
GENERAL DESCRIPTION
The NJM2870 is low dropout voltage regulator designed
for cellular phone application.
Advanced Bipolar technology achieves low noise, high
ripple rejection and low quiescent current.
s
FEATURES
qHigh
Ripple Rejection
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PACKAGE OUTLINE
NJM2870F
56dB
≤
RR (DC < f < 60kHz)
66dB typ. (f=100Hz)
60dB typ. (f=1kHz)
qOutput
Noise Voltage
Vno=30µV (Cp=0.01µF)
qOutput
Current
Io(max.)=150mA
qHigh
Precision Output
Vo±2%
qLow
Dropout Voltage
∆V
I
-
O
=0.12V typ. (Io=60mA, Vo≥1.8V)
qInput
Voltage range
+2∼+14V (Vo=1.5V Version)
qON/OFF
Control
(Active High)
qOutput
capacitor with 4.7uF ceramic capacitor
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
NJM2870F
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EQUIVALENT CIRCUIT
V
IN
Cont
PIN FUNCTION
1. CONTROL (Active High)
2. GND
3. NOISE BYPASS
4. V
OUT
5. V
IN
V
OUT
Thermal
Protection
Noise
Bypass
Bandgap
Reference
GND
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NJM2870
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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.
s
ELECTRICAL CHARACTERISTICS (V
IN
=Vo+1V, C
IN
=0.1µF, Co=4.7µF, Cp=0.01µF, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX.
Io=30mA
Output Voltage
Vo
+2%
−2%
−
Io=0mA, expect Icont
Quiescent Current
200
300
I
Q
−
Quiescent Current
100
I
Q(OFF)
V
CONT
=0V
−
−
at Control OFF
Output Current
Io
150
200
Vo−0.3V
−
Line Regulation
0.10
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
−
−
Load Regulation
0.03
∆Vo/∆Io
Io=0
∼
100mA
−
−
Dropout Voltage
0.12
0.2
∆V
I
-
O
Io=60mA
−
Ripple Rejection
ein=200mVrms,f=1kHz, Io=10mA
60
RR
−
−
V
IN
=Vo+2V, Vo=3V Version
Average Temperature
Ta=0∼85°C, Io=10mA,
0.2
∆Vo/∆Ta
−
−
Coefficient of Output Voltage
Vo=3V Version
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
V
NO
30
−
−
Vo=3V Version
Control Voltage for ON-state
1.6
V
CONT(ON)
−
−
Control Voltage for OFF-state
V
CONT(OFF)
0.6
−
−
UNIT
V
µA
nA
mA
%/V
%/mA
V
dB
mV/°C
µVrms
V
V
(note 2)Please confirm the specification separately because some parameters depend on output voltage.
s
ELECTRICAL CHARACTERISTICS
(Vo=1.5V Version, V
IN
=2.4V, C
IN
=0.1µF, Co=4.7µF, Cp=0.01µF, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
Io=30mA
Output Voltage
Vo
−2%
Io=0mA, expect Icont
Quiescent Current
I
Q
−
Quiescent Current
I
Q(OFF)
V
CONT
=0V
−
at Control OFF
Output Current
Io
150
Vo−0.3V
Line Regulation
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
−
Load Regulation
∆Vo/∆Io
Io=0
∼
100mA
−
Ripple Rejection
ein=200mVrms,f=1kHz, Io=10mA
RR
−
V
IN
=Vo+2V
Average Temperature
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
−
Coefficient of Output Voltage
Output Noise Voltage
V
NO
f=10Hz∼80kHz, Io=10mA,
−
Control Voltage for ON-state
1.6
V
CONT(ON)
Control Voltage for OFF-state
V
CONT(OFF)
−
TYP.
−
200
−
200
−
−
64
0.13
15
−
−
MAX. UNIT
+2%
V
300
µA
100
nA
mA
−
0.10 %/V
0.03 %/mA
−
−
−
−
0.6
dB
mV/°C
µVrms
V
V
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NJM2870
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OUTPUT VOLTAGE RANK LIST
Device Name
NJM2870F15
NJM2870F18
NJM2870F19
NJM2870F02
NJM2870F21
NJM2870F23
NJM2870F24
NJM2870F25
NJM2870F26
V
OUT
1.5V
1.8V
1.9V
2.0V
2.1V
2.3V
2.4V
2.5V
2.6V
Device Name
NJM2870F27
NJM2870F28
NJM2870F285
NJM2870F29
NJM2870F03
NJM2870F31
NJM2870F32
NJM2870F33
NJM2870F34
V
OUT
2.7V
2.8V
2.85V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
Device Name
NJM2870F35
NJM2870F36
NJM2870F38
NJM2870F04
NJM2870F45
NJM2870F46
NJM2870F47
NJM2870F48
NJM2870F05
V
OUT
3.5V
3.6V
3.8V
4.0V
4.5V
4.6V
4.7V
4.8V
5.0V
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TEST CIRCUIT
A
V
IN
I
IN
+
0.1
µ
F
V
IN
V
OUT
+
NJM2870
4.7
µ
F
I
OUT
V
V
OUT
(tantalum)
A
V
V
CONT
I
CONT
CONTROL
NOISE
BYPASS
GND
Cp=0.01µF
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NJM2870
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TYPICAL APPLICATION
x
In case that ON/OFF Control is not required:
V
IN
0.1
µ
F
R
(0
∼
300kΩ)
V
IN
V
OUT
V
OUT
4.7
µ
F
(ceramic or tantalum)
NJM2870
NOISE
CONTROL BYPASS
GND
Cp=0.01µF
Connect control terminal to V
IN
terminal
In case that a resistance “R” is used, the quiescent current decrease. Instead, the minimum operating
voltage increase. 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
4.7
µ
F
(ceramic or tantalum)
0.1
µ
F
R
NJM2870
CONTROL
NOISE
BYPASS
GND
Cp=0.01µF
In case that the control terminal is:
•“H”→
the output is generated.
•
“L” or “open”
→
the output is not generated.
✱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.
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NJM2870
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TYPICAL CHARACTERISTICS
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