NJM2391
PIN FUNCTION
1.V
IN
2.GND
3.V
OUT
NJM2391DL1
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
PACKAGE OUTLINE
The NJM2391 is low dropout voltage regulators
featuring high precision voltage.
It is suitable for Notebook PCs, PC cards and hard
disks where 3.3V need to be generated from 5V supply.
A small TO-252 package is adopted for the space
saving.
FEATURES
Output Current
Io(max.)=1A
High Precision Output Voltage
Vo
1%
Low Dropout Voltage
V
I-O
=1.1V typ. At Io=1A
Internal Excessive Voltage Protection Circuit
Internal Short Circuit Current Limit
Internal Thermal Overload Protection
Bipolar Technology
Package Outline
TO-252
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
(Ta=25
C)
PARAMETER SYMBOL RATINGS UNIT
Input Voltage
V
+
+10 V
Power Dissipation
P
D
TO-252
8 (Tc=25
C)
0.8(Ta
25
C)
W
Operating Temperature
Topr
-
40 ~ +85
C
Storage Temperature
Tstg
-
50 ~ +125
C
OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
NJM2391DL1-25 2.5V
NJM2391DL1-26 2.6V
NJM2391DL1-28 2.85V
NJM2391DL1-03 3.0V
NJM2391DL1-33 3.3V
NJM2391DL1-35 3.5V
NJM2391DL1-05 5.0V
NJM2391DL1
3
1
2
NJM2391
TEST CIRCUIT
1.Output Voltage / Line Regulation / Load Regulation
Quiescent Current / Dropout Voltage /
Output Noise Voltage
NJM2391
V
IN
V
IN
V
OUT
GND
0.1
F
I
IN
10
F
I
OUT
V
OUT
V
A
+
+
A
BPF
V
NO
V.V
RL
2.Ripple Rejection
NJM2391
V
IN
V
IN
V
OUT
GND
0.1
F 10
F
I
OUT
A
+
+
eo
V.V
RL
ein=2Vp-p
f=120Hz
RR=20log
10
[ein/eo] (dB)
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2391DL1
(Topr=-40~+85C,Tj=125C,P
D
=8W(T
C
=25C),P
D
=0.8W(Ta=25C))
0
2
4
6
8
10
-50
-25
0
25
50
75
100
Ambient Temperature Ta(C)
Power
Dissipat
ion P
D
(W)
Heat Sink
Without Heat Sink
HS
=5C/W
HS
=20C/W
HS
=10C/W
NJM2391
[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.