NJRC NJM2397

NJM2397
ADJUSTABLE LOW DROPOUT VOLTAGE REGULATOR
„ GENERAL DESCRIPTION
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.
„ PACKAGE OUTLINE
The NJM2397 is suitable for power module, TV, Display, car
stereo and low power applications.
„ FEATURE
●Low Dropout Voltage
∆VI-O=0.2V typ. at Io=0.5A
●Output Current
Io(max.)=1.5A
●Reference Voltage
Vref=1.29V typ.
●Internal Short Circuit Current Limit
●Internal Thermal Overload Protection
●Bipolar Technology
●Package Outline
TO-220F(4pin)
NJM2397F
„ PIN CONFIGURATION
PIN FUNCTION
1. VIN
2. VOUT
3. GND
4. ADJ
1234
NJM2397F
„ EQUIVALENT CIRCUIT
VOUT
VIN
Control
Circuit
VADJ
GND
Ver.2004-12-22
-1-
NJM2397
„ ABSOLUTE MAXIMUM RATINGS
PARAMETER
Input Voltage
Adjust terminal Voltage
Output Current
Power Dissipation
Operating Junction Temperature Range
Operating Temperature Range
Storage Temperature Range
(Ta=25°C)
RATINGS
UNIT
+35
V
+6
V
1.5
A
W
18(Tc<50°C)
-40 to +150
°C
-40 to 85
°C
-50 to 150
°C
SYMBOL
VIN
VADJ
Io
PD
Tj
Topr
Tstg
„ ELECTRICAL CHARACTERISTICS (VIN=15V, Vo=10V, Io=0.5A, R1=1kΩ, CIN=0.33uF, Co=22uF, Tj=25°C)
Measurement is to be conducted is pulse testing.
PARAMETER
Input Voltage
Output Voltage
Reference Voltage
Line Regulation
Load Regulation
Average Temperature
Coefficient of Output Voltage
Quiescent Current
Dropout Voltage
SYMBOL
CONDITIONS
VIN
Vo
Vref
∆Vo/∆VIN
VIN=Vo+1V~Vo+17V
∆Vo/∆Io
VIN=Vo+2V, Io=0A~1.5A
Ripple Rejection
RR
MIN.
3.8
1.5
1.238
-
TYP.
1.29
0.04
0.2
MAX.
35
20
1.342
0.16
1.4
UNIT
V
V
V
%/V
%/A
∆Vo/∆T
Tj=0~125°C
-
±0.02
-
%/°C
IQ
∆VI-O
Io=0A
Io=0.5A
Vin=Vo+2V,
ein=0.5Vrms, f=120Hz
-
0.2
5
0.5
mA
V
45
55
-
dB
„ TEST CIRCUIT
1
VIN
0.33uF
+
A
2
R2
A
4
3
IQ
-2-
NJM2397
Vref
V
Io
+
R1
1kΩ
22uF
V
Vo
RL
Ver.2004-12-22
NJM2397
„ TYPICAL CHARACTERISTICS
Ver.2004-12-22
-3-
NJM2397
„ TYPICAL CHARACTERISTICS
-4-
Ver.2004-12-22
NJM2397
[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.
Ver.2004-12-22
-5-