NJM2856
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJM2856 is a low dropout voltage regulator with
ON/OFF control.
Advanced Bipolar technology achieves low noise, high ripple
rejection.
It delivers up to 5V/1A output power with the maximum input
voltage of 10V.
The NJM2856 is suitable for various applications such as
portable / consumer equipments.
FEATURES
High Ripple Rejection
75dB typ. (f=1kHz,Vo=3V Version)
Output Noise Voltage
Vno=45µVrms typ.
Output capacitor with 2.2µF ceramic capacitor (Vo≥2.7V)
Output Current
Io(max.)=1A
High Precision Output
Vo±1.0%
Low Dropout Voltage
0.20V typ. (Io=600mA)
ON/OFF Control
Internal Short Circuit Current Limit
Internal Thermal Overload Protection
Bipolar Technology
Package Outline
TO-252-5
PIN CONFIGURATION
3
PACKAGE OUTLINE
NJM2856DL3
123 45
1.CONTROL
2.V
IN
3.GND
4.Vo
5.NC
NJM2856DL3
EQUIVALENT CIRCUIT
V
IN
Control
Bandgap
Reference
Thermal
Protection
V
OUT
GND
Ver.2008-11-12
1
NJM2856
OUTPUT VOLTAGE RANK LIST
The WHITE column shows applicable Voltage Rank(s)
Device Name
NJM2856DL3-15
NJM2856DL3-16
NJM2856DL3-17
NJM2856DL3-18
NJM2856DL3-19
NJM2856DL3-02
NJM2856DL3-21
NJM2856DL3-22
NJM2856DL3-23
NJM2856DL3-24
NJM2856DL3-25
NJM2856DL3-26
NJM2856DL3-27
NJM2856DL3-28
NJM2856DL3-29
NJM2856DL3-03
NJM2856DL3-31
NJM2856DL3-32
NJM2856DL3-33
NJM2856DL3-34
V
out
1.5V
1.6V
1.7V
1.8V
1.9V
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
Device Name
NJM2856DL3-35
NJM2856DL3-36
NJM2856DL3-37
NJM2856DL3-38
NJM2856DL3-39
NJM2856DL3-04
NJM2856DL3-41
NJM2856DL3-42
NJM2856DL3-43
NJM2856DL3-44
NJM2856DL3-45
NJM2856DL3-46
NJM2856DL3-47
NJM2856DL3-48
NJM2856DL3-49
NJM2856DL3-05
V
out
3.5V
3.6V
3.7V
3.8V
3.9V
4.0V
4.1V
4.2V
4.3V
4.4V
4.5V
4.6V
4.7V
4.8V
4.9V
5.0V
2
Ver.2008-11-12
NJM2856
(Ta=25°C)
RATINGS
UNIT
+10
V
+10
V
1190(*1)
mW
-40
∼
+85
°C
-40
∼
+150
°C
(*1): Mounted on glass epoxy board. (114.3x76.2x1.6mm: 2Layers, FR-4, copper area 100mm
2
)
OPERATING VOLTAGE
V
IN
=+2.5V ~ +8V (In case of Vo<2.3V version)
ELECTRICAL CHARACTERISTICS
(V
IN
=Vo+1V, C
IN
=0.33µF, Co=2.2µF(1.7V<Vo≤2.6V:4.7µF, Vo≤1.7V:10µF), Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Output Voltage
Vo
Io=30mA
-1.0%
-
+1.0%
V
Input Voltage
V
IN
-
-
8
V
Quiescent Current
I
Q
Io=0mA
-
400
600
µA
Quiescent Current
V
CONT
=0V
100
nA
I
Q(OFF)
−
−
at Control OFF
Output Current
Io
Vo-0.3V
1000 1300
-
mA
V
IN
=Vo+1V~Vo+6V(Vo≤2V),
Line Regulation
-
-
0.10
%/V
∆Vo/∆V
IN
V
IN
=Vo+1V~8V(Vo>2V),
Io=30mA
Load Regulation
-
-
0.004 %/mA
∆Vo/∆Io
Io=0
∼
1A
Io=600mA
-
0.20 0.28
V
Dropout Voltage(*2)
∆V
I−O
ein=200mVrms,f=1kHz, Io=10mA
Ripple Rejection
RR
-
75
-
dB
Vo=3.0V Version
Average Temperature
-
-
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
±50
ppm/°C
Coefficient of Output Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
V
NO
-
45
-
µVrms
Vo=3.0V Version(*3)
Control Current
I
CONT
V
CONT
=1.6V, Io=0mA
-
3
12
µA
Control Voltage for ON-state V
CONT(ON)
1.6
-
-
V
Control Voltage for OFF-state V
CONT(OFF)
-
-
0.6
V
Input Voltage
V
IN
-
-
8
V
(*2): The output voltage excludes under 2.1V.
(*3): Vo>2.0V : V
IN
=Vo+1V, Vo≤2.0V : V
IN
=3.0V
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.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltae
V
CONT
Power Dissipation
P
D
Operating Temperature
Topr
Storage Temperature
Tstg
Ver.2008-11-12
3
NJM2856
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2856DL3 PowerDissipation
(Topr=-40~+85°C,Tj=150°C)
3500
Power Dissipation P
D
(mW)
3000
2500
2000
1500
1000
500
0
-50
on 4 layers board
on 2 layers board
-25
0
25
50
75
100
Temperature : Ta(°C)
TEST CIRCUIT
A
V
IN
I
IN
V
IN
V
OUT
0.33µF
I
CONT
NJM2856
2.2µF
*4
I
OUT
V
V
OU
(ceramic)
A
V
V
CONT
*4
CONTROL
GND
1.7V<Vo≤2.6V version: Co=4.7µF(ceramic)
Vo≤1.7V version: Co=10µF(ceramic)
4
Ver.2008-11-12
NJM2856
TYPICAL APPLICATION
1
In the case where ON/OFF Control is not required:
V
IN
0.33µF
R
V
IN
V
OUT
V
OUT
NJM2856
2.2µF
*5
CONTROL
GND
*5
1.7V<Vo
≤
2.6V version: Co=4.7µF
Vo
≤
1.7V version: 10µF
Connect control terminal to V
IN
terminal
2
In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
V
OUT
0.33µF
R
NJM2856
2.2µF
*5
CONTROL
GND
*5 1.7V<Vo≤2.6V version: Co=4.7µF
Vo≤1.7V version: 10µF
State of control terminal:
•“H”→
output is enabled.
•“L”
or “open”
→
output is disabled.
In the case of using a resistance "R" between V
IN
and control.
The current flow into the control terminal while the IC is ON state (I
CONT
) can be reduced when a pull up
resistance "R" is inserted between V
IN
and the control terminal.
The minimum control voltage for ON state (V
CONT (ON)
) is increased due to the voltage drop caused by
I
CONT
and the resistance "R".
Ver.2008-11-12
5
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
