NJM2391
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
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
2
PACKAGE OUTLINE
NJM2391DL1
PIN FUNCTION
1.V
IN
2.GND
3.V
OUT
3
1
NJM2391DL1
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
+
Power Dissipation
Operating Temperature
Storage Temperature
P
D
Topr
Tstg
(Ta=25°C)
UNIT
V
W
°C
°C
RATINGS
+10
8 (Tc=25°C)
TO-252
0.8(Ta≤25°C)
−40
~ +85
−50
~ +125
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
NJM2391
ELECTRICAL CHARACTERISTICS (C
IN
=0.1µF, Co=10µF, Tj=25°C)
Measurement is to be conducted is pulse testing
PARAMETER
SYMBOL
TEST CONDITION
Vo=2.5V Version
V
IN
=5.5V, Io=0.01A
V
O
Output Voltage
Line Regulation
∆Vo/∆V
IN
V
IN
=4V~9V, Io=1A
V
IN
=5. 5V, Io=0~1A
Load Regulation
∆Vo/∆Io
Quiescent Current
I
Q
V
IN
=5.5V, Io=0A
V
IN
=5.5V, ein=2V
P
-
P
RR
Ripple Rejection
f=120Hz, Io=0.5A
Io=1A
Dropout Voltage
∆V
I-O
V
IN
=5.5V, Io=0.5A
V
NO
Output Noise Voltage
BW=10Hz~100kHz
Vo=2.6V Version
V
O
V
IN
=5.6V, Io=0.01A
Output Voltage
Line Regulation
∆Vo/∆V
IN
V
IN
=4.1V~9.1V, Io=1A
V
IN
=5.6V, Io=0~1A
Load Regulation
∆Vo/∆Io
Quiescent Current
I
Q
V
IN
=5.6V, Io=0A
V
IN
=5.6V, ein=2V
P
-
P
RR
Ripple Rejection
f=120Hz, Io=0.5A
Io=1A
Dropout Voltage
∆V
I-O
V
IN
=5.6V, Io=0.5A
V
NO
Output Noise Voltage
BW=10Hz~100kHz
Vo=2.85V Version
V
IN
=5.85V, Io=0.01A
V
O
Output Voltage
Line Regulation
∆Vo/∆V
IN
V
IN
=4.35V~9.35V, Io=1A
V
IN
=5.85V, Io=0~1A
Load Regulation
∆Vo/∆Io
Quiescent Current
I
Q
V
IN
=5.85V, Io=0A
V
IN
=5.85V, ein=2V
P
-
P
RR
Ripple Rejection
f=120Hz, Io=0.5A
Io=1A
Dropout Voltage
∆V
I-O
V
IN
=5.85V, Io=0.5A
V
NO
Output Noise Voltage
BW=10Hz~100kHz
Vo=3V Version
V
O
V
IN
=6V, Io=0.01A
Output Voltage
Line Regulation
∆Vo/∆V
IN
V
IN
=4.5V~9.5V, Io=1A
V
IN
=6V, Io=0~1A
Load Regulation
∆Vo/∆Io
Quiescent Current
I
Q
V
IN
=6V, Io=0A
V
IN
=6V, ein=2V
P
-
P
RR
Ripple Rejection
f=120Hz, Io=0.5A
Io=1A
Dropout Voltage
∆V
I-O
V
IN
=6V, Io=0.5A
V
NO
Output Noise Voltage
BW=10Hz~100kHz
MIN.
2.475
−
−
−
53
−
−
2.574
−
−
−
53
−
−
2.82
−
−
−
53
−
−
2.97
−
−
−
52
−
−
TYP.
2.5
−
−
2.3
63
1.1
85
2.60
−
−
2.3
63
1.1
87
2.85
−
−
2.3
63
1.1
90
3.00
−
−
2.3
62
1.1
95
MAX.
2.525
50
50
4.0
−
1.2
185
2.626
52
52
4.0
−
1.2
187
2.88
57
57
4.0
−
1.2
190
3.03
60
60
4.0
−
1.2
195
UNIT
V
mV
mV
mA
dB
V
µV
V
mV
mV
mA
dB
V
µV
V
mV
mV
mA
dB
V
µV
V
mV
mV
mA
dB
V
µV
NJM2391
ELECTRICAL CHARACTERISTICS (C
IN
=0.1µF, Co=10µF, Tj=25°C)
Measurement is to be conducted is pulse testing
PARAMETER
SYMBOL
TEST CONDITION
Vo=3.3V Version
V
IN
=6.3V, Io=0.01A
V
O
Output Voltage
Line Regulation
∆Vo/∆V
IN
V
IN
=4.8V~9.8V, Io=1A
V
IN
=6.3V, Io=0~1A
Load Regulation
∆Vo/∆Io
Quiescent Current
I
Q
V
IN
=6.3V, Io=0A
V
IN
=6.3V, ein=2V
P
-
P
RR
Ripple Rejection
f=120Hz, Io=0.5A
Io=1A
Dropout Voltage
∆V
I-O
V
IN
=6.3V, Io=0.5A
V
NO
Output Noise Voltage
BW=10Hz~100kHz
Vo=3.5V Version
V
O
V
IN
=6.5V, Io=0.01A
Output Voltage
Line Regulation
∆Vo/∆V
IN
V
IN
=5V~10V, Io=1A
V
IN
=6.5V, Io=0~1A
Load Regulation
∆Vo/∆Io
Quiescent Current
I
Q
V
IN
=6.5V, Io=0A
V
IN
=6.5V, ein=2V
P
-
P
RR
Ripple Rejection
f=120Hz, Io=0.5A
Io=1A
Dropout Voltage
∆V
I-O
V
IN
=6.5V, Io=0.5A
V
NO
Output Noise Voltage
BW=10Hz~100kHz
Vo=5V Version
V
IN
=8V, Io=0.01A
V
O
Output Voltage
Line Regulation
∆Vo/∆V
IN
V
IN
=6.5V~9.5V, Io=1A
V
IN
=8V, Io=0~1A
Load Regulation
∆Vo/∆Io
Quiescent Current
I
Q
V
IN
=8V, Io=0A
V
IN
=8V, ein=2V
P
-
P
RR
Ripple Rejection
f=120Hz, Io=0.5A
Io=1A
Dropout Voltage
∆V
I-O
V
IN
=8V, Io=0.5A
V
NO
Output Noise Voltage
BW=10Hz~100kHz
MIN.
3.267
−
−
−
52
−
−
3.465
−
−
−
52
−
−
4.95
−
−
−
50
−
−
TYP.
3.30
−
−
2.3
62
1.1
100
3.50
−
−
2.3
62
1.1
105
5.00
−
−
2.3
60
1.1
150
MAX.
3.333
66
66
4.0
−
1.2
200
3.535
70
70
4.0
−
1.2
205
5.05
60
100
4.0
−
1.2
260
UNIT
V
mV
mV
mA
dB
V
µV
V
mV
mV
mA
dB
V
µV
V
mV
mV
mA
dB
V
µV
NJM2391
TEST CIRCUIT
1.Output Voltage / Line Regulation / Load Regulation
Quiescent Current / Dropout Voltage /
Output Noise Voltage
V
IN
V
OUT
NJM2391
GND
+
10µF
RL
BPF
A
I
IN
V
IN
+
0.1µF
A
I
OUT
V
V
OUT
V.V
V
NO
2.Ripple Rejection
ein=2Vp-p
f=120Hz
+
V
IN
0.1µF
V
IN
NJM2391
GND
V
OUT
+
10µF
RL
A
I
OUT
V.V
eo
RR=20log
10
[ein/eo] (dB)
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2391DL1
(Topr=-40~+85°C,Tj=125°C,P
D
=8W(T
C
=25°C),P
D
=0.8W(Ta=25°C))
10
Power Dissipation P
D
(W)
8
6
4
2
0
-50
∞
Heat Sink
θ
HS
=5°C/W
θ
HS
=10°C/W
θ
HS
=20°C/W
Without Heat Sink
-25
0
25
50
75
100
Ambient Temperature Ta(°C)
NJM2391
ELECTRICAL CHARACTERISTICS
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