NJM2397
- 1 -
Ver.2004-12-22
ADJUSTABLE
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
PACKAGE OUTLINE
The NJM2397 is adjustable low dropout voltage regulator.
The output current is up to 1.5A and dropout voltage is
0.2Vtyp. at Io=0.5A.
The NJM2397 is suitable for power module, TV, Display, car
stereo and low power applications.
FEATURE
q
Low Dropout Voltage
V
I-O
=0.2V typ. at Io=0.5A
q
Output Current
Io(max.)=1.5A
q
Reference Voltage
Vref=1.29V typ.
q
Internal Short Circuit Current Limit
q
Internal Thermal Overload Protection
q
Bipolar Technology
q
Package Outline
TO-220F(4pin)
PIN CONFIGURATION
1 2 3 4
NJM2397F
EQUIVALENT CIRCUIT
V
OUT
V
IN
V
ADJ
GND
Control
Circuit
NJM2397F
PIN FUNCTION
1. V
IN
2. V
OUT
3. GND
4. ADJ
NJM2397
- 2 -
Ver.2004-12-22
ABSOLUTE MAXIMUM RATINGS
(Ta=25
C)
PARAMETER SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
+35 V
Adjust terminal Voltage
V
ADJ
+6 V
Output Current
Io
1.5
A
Power Dissipation
P
D
18(Tc<50
C)
W
Operating Junction Temperature Range
Tj
-40 to +150
C
Operating Temperature Range
Topr -40
to
85
C
Storage Temperature Range
Tstg -50
to
150
C
ELECTRICAL CHARACTERISTICS (V
IN
=15V, Vo=10V, Io=0.5A, R1=1k
, C
IN
=0.33uF, Co=22uF, Tj=25
C)
Measurement is to be conducted is pulse testing.
PARAMETER SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Input Voltage
V
IN
3.8
- 35
V
Output Voltage
Vo
1.5
-
20
V
Reference
Voltage
Vref
1.238 1.29 1.342 V
Line Regulation
Vo/V
IN
V
IN
=Vo+1V~Vo+17V -
0.04
0.16
%/V
Load Regulation
Vo/Io V
IN
=Vo+2V, Io=0A~1.5A
-
0.2
1.4
%/A
Average Temperature
Coefficient of Output Voltage
Vo/
T Tj=0~125
C
-
0.02
-
%/
C
Quiescent Current
I
Q
Io=0A
-
-
5
mA
Dropout Voltage
V
I-O
Io=0.5A -
0.2
0.5
V
Ripple Rejection
RR
Vin=Vo+2V,
ein=0.5Vrms, f=120Hz
45 55 - dB
TEST CIRCUIT
A
A
V
2
4
3
1
Io
22uF
Vo
0.33uF
V
IN
R
L
NJM2397
+
I
Q
+
R
1
1k
R
2
V
Vref
NJM2397
- 5 -
Ver.2004-12-22
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
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