NJM2870
LOW DROPOUT VOLTAGE REGULATOR
I
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.
I
FEATURES
GHigh
Ripple Rejection
I
PACKAGE OUTLINE
NJM2870F
56dB
≤
RR (DC < f < 60kHz)
66dB typ. (f=100Hz)
60dB typ. (f=1kHz)
GOutput
Noise Voltage
Vno=30µV (Cp=0.01µF)
GOutput
Current
Io(max.)=150mA
GHigh
Precision Output
Vo±2%
GLow
Dropout Voltage
∆V
I
-
O
=0.12V typ. (Io=60mA, Vo≥1.8V)
GInput
Voltage range
+2∼+14V (Vo=1.5V Version)
GON/OFF
Control
(Active High)
GOutput
capacitor with 4.7uF ceramic capacitor
GInternal
Short Circuit Current Limit
GInternal
Thermal Overload Protection
GBipolar
Technology
GPackage
Outline
MTP5 (MTP5: 2.8×2.9×1.1mm)
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PIN CONFIGURATION
1
2
3
4
5
NJM2870F
I
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
NJM2870
I
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.
I
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
−
−
(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.
I
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
V
CONT(ON)
1.6
Control Voltage for OFF-state
V
CONT(OFF)
−
UNIT
V
µA
nA
mA
%/V
%/mA
V
dB
mV/°C
µVrms
V
V
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
NJM2870
I
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
NJM2870
I
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
NJM2870
(ceramic or tantalum)
NOISE
CONTROL BYPASS
GND
Cp=0.01µF
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
4.7
µ
F
0.1
µ
F
R
NJM2870
(ceramic or tantalum)
CONTROL
NOISE
BYPASS
GND
Cp=0.01µF
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.
NJM2870
I
TYPICAL CHARACTERISTICS
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