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Электронный компонент: NJM2872F

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NJM2871/A, NJM2872/A
LOW DROPOUT VOLTAGE REGULATOR
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GENERAL DESCRIPTION
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PACKAGE OUTLINE
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
q
High Ripple Rejection
70dB typ. (f=1kHz)
q
Output Noise Voltage
Vno=30
Vrms (Cp=0.01
F)
q
Output capacitor with 1.0uF ceramic capacitor (Vo
2.7V)
q
Output Current
Io(max.)=150mA
q
High Precision Output
Vo
2%
Vo
1%:A Version
q
Low Dropout Voltage
0.10V typ. (Io=60mA)
q
ON/OFF Control
(Active High)
q
Operating Voltage Range +2.5V
+14V (Vo
2.0V version)
q
Internal Short Circuit Current Limit
q
Internal Thermal Overload Protection
q
Bipolar Technology
q
Package Outline
MTP5 (MTP5:2.82.91.1mm)

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PIN CONFIGURATION
1
5
2
3
4
1
5
2
3
4
NJM2871F/AF NJM2872F/AF

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EQUIVALENT CIRCUIT

V
OUT
GND
V
IN
Thermal
Protection
Bandgap
Reference
Noise
Bypass
Cont


NJM2871F/AF
NJM2872F/AF
PIN FUNCTION
1. CONTROL (Active High)
2. GND
3. NOISE BYPASS
4. V
OUT
5. V
IN
PIN FUNCTION
1.V
IN
2.GND
3.CONTROL (Active High)
4.NOISE BYPASS
5.V
OUT
NJM2871/A, NJM2872/A
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ABSOLUTE MAXIMUM RATINGS (Ta=25
C)
PARAMETER SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
+14 V
Control Voltage
V
CONT
+14(note
1) V
Power Dissipation
P
D
200
mW
Operating Temperature
Topr
-
40
+85
C
Storage Temperature
Tstg
-
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
=0.1
F, Co=1.0uF: Vo
2.7V (Co=2.2uF: Vo
2.6V), Cp=0.01
F, 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
Quiescent Current
I
Q
Io=0mA, expect Icont
-
120 180
A
Quiescent Current
at Control OFF
I
Q(OFF)
V
CONT
=0V
-
-
100
nA
Output Current
Io
Vo
-
0.3V
150 200 - mA
Line Regulation
Vo/
V
IN
V
IN
=Vo+1V
Vo+6V, Io=30mA
-
-
0.10 %/V
Load Regulation
Vo/
Io Io=0
100mA
-
-
0.03 %/mA
Dropout Voltage
V
I
-
O
Io=60mA
-
0.10 0.18 V
Ripple Rejection
RR
ein=200mVrms,f=1kHz, Io=10mA
V
IN
=Vo+1V, Vo=3V Version
-
70
-
dB
Average Temperature
Coefficient of Output Voltage
Vo/
Ta
Ta=0
85
C, Io=10mA,
Vo=3V Version
-
0.2
-
mV/
C
Output Noise Voltage
V
NO
f=10Hz
80kHz, Io=10mA,
Vo=3V Version
-
30
-
Vrms
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
=0.1
F, Co=4.7uF, Cp=0.01
F, 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
Quiescent Current
I
Q
Io=0mA, expect Icont
-
120 180
A
Quiescent Current
at Control OFF
I
Q(OFF)
V
CONT
=0V
-
-
100
nA
Output Current
Io
Vo
-
0.3V
150 200 - mA
Line Regulation
Vo/
V
IN
V
IN
=Vo+1V
Vo+6V, Io=30mA
-
-
0.10 %/V
Load Regulation
Vo/
Io Io=0
100mA
-
-
0.03 %/mA
Ripple Rejection
RR
ein=200mVrms,f=1kHz, Io=10mA
V
IN
=Vo+1V, Vo=1.8V Version
-
75
-
dB
Average Temperature
Coefficient of Output Voltage
Vo/
Ta
Ta=0
85
C, Io=10mA,
Vo=1.8V Version
-
0.13
-
mV/
C
Output Noise Voltage
V
NO
f=10Hz
80kHz, Io=10mA,
Vo=1.8V Version
-
22
-
Vrms
Control Voltage for ON-state V
CONT(ON)
1.6
-
-
V
Control Voltage for OFF-state V
CONT(OFF)
-
-
0.6 V
(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 V
OUT
Device
Name
V
OUT
NJM287
15
1.5V
NJM287
285
2.85V NJM287
35
3.5V
NJM287
18
1.8V
NJM287
29
2.9V
NJM287
38
3.8V
NJM287
21
2.1V
NJM287
03
3.0V
NJM287
04
4.0V
NJM287
25
2.5V
NJM287
31
3.1V
NJM287
05
5.0V
NJM287
26
2.6V
NJM287
32
3.2V
NJM287
27
2.7V
NJM287
33
3.3V
NJM287
28
2.8V
NJM287
34
3.4V


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TEST CIRCUIT

V
IN
V
IN
V
OUT
CONTROL
NOISE
BYPASS
GND
0.1uF
I
IN
I
CONT
V
CONT
Cp=0.01uF
I
OUT
V
OUT
V
V
A
A
(ceramic)
1.0uF
*note1
*
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
OUT
CONTROL
NOISE
BYPASS
GND
0.1uF
Cp=0.01uF
V
OUT
V
IN
R
(0
300k
)
(ceramic)
1.0uF
*note1
*
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".
y
In use of ON/OFF CONTROL:
V
IN
V
OUT
CONTROL
NOISE
BYPASS
GND
0.1uF
Cp=0.01uF
V
OUT
V
IN
R
(ceramic)
1.0uF
*note1
*
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