NJM2819A
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJM2819A is a low dropout voltage regulator with ON/OFF
control.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
It delivers up to 7V/2A output power with the maximum input
voltage of 10V.
The NJM2819A is suitable for audio/video and digital applications.
FEATURES
High Ripple Rejection
65dB typ. (f=1kHz,3V Version)
Output Noise Voltage
Vno=42µVrms typ. (Vo=3V Version)
Output capacitor with 4.7µF ceramic capacitor (Vo≥2.1V)
Output Current
Io(max.)=2.0A
High Precision Output
Vo
±1.0%
Low Dropout Voltage
0.1V typ. (Io=1.0A, 3.0V Version)
ON/OFF Control
Internal Short Circuit Current Limit
Internal Thermal Overload Protection
Package Outline
TO-252-5
PIN CONFIGURATION
3
PACKAGE OUTLINE
NJM2819ADL3
123 45
1. V
IN
2. CONTROL
3. Vo
4. N.C.
5. GND
NJM2819ADL3
EQUIVALENT CIRCUIT
V
IN
Current
Limit
V
OUT
CONTROL
Bandgap
Reference
Thermal
Protection
GND
Ver.2010-02-08
-1-
NJM2819A
OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
NJM2819ADL3-18
1.8V
NJM2819ADL3-21
2.1V
NJM2819ADL3-03
3.0V
NJM2819ADL3-33
3.3V
NJM2819ADL3-05
5.0V
NJM2819ADL3-52
5.2V
NJM2819ADL3-07
7.0V
Output voltage options available : 1.8 ~ 7.0V
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
Control Voltage
Power Dissipation
Operating Temperature
Storage Temperature
V
IN
V
CONT
P
D
Topr
Tstg
(Ta=25°C)
UNIT
V
V
mW
°C
°C
RATINGS
V
O
> 6.0V: +10
5.0V < V
O
≤
6.0V: +9V
V
O
≤
5.0V: +8
V
O
> 6.0V: +10
5.0V < V
O
≤
6.0V: +9V
V
O
≤
5.0V: +8
1190(*1)
3125(*2)
-40
∼
+85
-40
∼
+150
(*1) : Mounted on glass epoxy board. (76.2×114.3×1.6mm:EIA/JDEC standard size, 2Layers, copper area 100mm
2
)
(*2) : Mounted on glass epoxy board. (76.2×114.3×1.6mm:EIA/JDEC standard size, 4Layers, copper area 100mm
2
)
(4Layers inner foil : 74.2 x 74.2mm Applying a thermal beer hall to a board based on JEDEC standard JESD51-5)
OPERATING VOLTAGE
V
IN
=V
O
+
∆V
I-O
~ 9V (In case of V
O
> 6.0V version)
V
IN
=V
O
+
∆V
I-O
~ 8V (In case of 5.0V < V
O
≤
6.0V version)
V
IN
=V
O
+
∆V
I-O
~ 7V (In case of 2.1V
≤
V
O
≤
5.0V version)
V
IN
=2.3V ~ 7V (In case of V
O
< 2.1V version)
-2-
Ver.2010-02-08
NJM2819A
ELECTRICAL CHARACTERISTICS (V
IN
=Vo+1V, C
IN
=4.7µF, Co=4.7µF(Co=10µF : 1.8V≤Vo<2.1V), Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
Output Voltage
Vo
Io=100mA
-1.0%
-
+1.0%
Quiescent Current
I
Q
Io=0mA, exclude I
CONT
-
500
800
Quiescent Current
I
Q (OFF)
V
CONT
=0V
-
-
1
at Control OFF
Output Current
Io
Vo - 0.3V
2
3
-
V
O
>5.0V : V
IN
=Vo+1V
∼
9V,
5.0V < V
O
≤
6.0V : V
IN
=Vo+1V
∼
8V,
-
-
0.1
Line Regulation
∆Vo/∆V
IN
V
O
≤5.0V
: V
IN
=Vo+1V
∼
7V,
Io=100mA
Load Regulation
-
0.05
0.4
∆Vo/∆Io
Io=0
∼
2.0A
-
0.14
0.25
2.1V
≤
Vo < 2.5V
-
0.11
0.20
2.5V
≤
Vo < 2.8V
Dropout Voltage(*2)
Io=1.0A
∆V
I -O
-
0.10
0.18
2.8V
≤
Vo < 3.4V
-
0.09
0.16
3.4V
≤
Vo
≤
7.0V
ein=200mVrms,f=1kHz, Io=100mA,
Ripple Rejection
RR
-
65
-
Vo=3V Version
Average Temperature
-
-
∆Vo/∆Ta
Ta=0
∼
85°C, Io=100mA
±
50
Coefficient of Output Voltage
f=10Hz
∼
80kHz, Io=100mA,
Output Noise Voltage
V
NO
-
42
-
Vo=3V Version
Control Current
I
CONT
V
CONT
=1.6V
-
3
12
Control Voltage for ON-state
V
CONT(ON)
1.6
-
-
Control Voltage for OFF-state
V
CONT(OFF)
-
-
0.6
Io≤1.5A, Vo×0.96
2.3
-
-
Minimum Input Voltage
V
IN (MIN.)
Vo<2.1V
1.5A<Io≤2.0A, Vo×0.96
2.4
-
-
(*2): The output voltage excludes under 2.1V.
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.
UNIT
V
µA
µA
A
%/V
%/A
V
dB
ppm/°C
µVrms
µA
V
V
V
V
Ver.2010-02-08
-3-
NJM2819A
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2819ADL3 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
*3
4.7µF
NJM2819A
4.7µF
(Ceramic)
I
OUT
V
V
OU
A
V
V
CONT
I
CONT
CONTROL
GND
*3 : 1.8
≤Vo<2.6V
version : Co=10µF (Ceramic)
-4-
Ver.2010-02-08
NJM2819A
TYPICAL APPLICATION
1
In the case where ON/OFF Control is not required:
V
IN
4.7µF
R
V
IN
V
OUT
*4
V
OUT
4.7µF
NJM2819A
CONTROL
GND
*4 : 1.8
≤Vo<2.6V
version : Co=10µF
Connect control terminal to V
IN
terminal
2
In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
*4
V
OUT
4.7µF
4.7µF
R
NJM2819A
CONTROL
GND
*4 : 1.8
≤Vo<2.6V
version : Co=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". The I
CONT
is temperature dependence as shown in the "Control Current vs. Temperature"
characteristics. Therefore, the resistance "R" should be carefully selected to ensure the control voltage exceeds
the V
CONT (ON)
over the required temperature range.
Ver.2010-02-08
-5-
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
