NJM2391
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
■ 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
2
3
1
NJM2391DL1
1. IN
2. GND
3. OUT
NJM2391
■ ELECTRICAL CHARACTERISTICS (C
IN
=0.1µF, Co=10µF, Tj=25°C)
Measurement is to be conducted is pulse testing
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Vo=2.5V Version
Output Voltage
V
O
V
IN
=5.5V, Io=0.01A
2.475
2.5
2.525 V
Line Regulation ∆Vo-V
IN
V
IN
=4V~9V, Io=1A − − 50 mV
Load Regulation ∆Vo-Io V
IN
=5. 5V, Io=0~1A − − 50 mV
Quiescent Current I
Q
V
IN
=5.5V, Io=0A − 2.3 4.0 mA
Ripple Rejection RR V
IN
=5.5V, ein=2V
P
-
P
f=120Hz, Io=0.5A 53 63 − dB
Dropout Voltage ∆V
I-O
Io=1A − 1.1 1.2 V
Output Noise Voltage V
NO
V
IN
=5.5V, Io=0.5A
BW=10Hz~100kHz − 85 185 µV
Vo=2.6V Version
Output Voltage
V
O
V
IN
=5.6V, Io=0.01A
2.574
2.60
2.626 V
Line Regulation ∆Vo-V
IN
V
IN
=4.1V~9.1V, Io=1A − − 52 mV
Load Regulation ∆Vo-Io V
IN
=5.6V, Io=0~1A − − 52 mV
Quiescent Current I
Q
V
IN
=5.6V, Io=0A − 2.3 4.0 mA
Ripple Rejection RR V
IN
=5.6V, ein=2V
P
-
P
f=120Hz, Io=0.5A 53 63 − dB
Dropout Voltage ∆V
I-O
Io=1A − 1.1 1.2 V
Output Noise Voltage V
NO
V
IN
=5.6V, Io=0.5A
BW=10Hz~100kHz − 87 187 µV
Vo=2.85V Version
Output Voltage
V
O
V
IN
=5.85V, Io=0.01A
2.82
2.85
2.88 V
Line Regulation ∆Vo-V
IN
V
IN
=4.35V~9.35V, Io=1A − − 57 mV
Load Regulation ∆Vo-Io V
IN
=5.85V, Io=0~1A − − 57 mV
Quiescent Current I
Q
V
IN
=5.85V, Io=0A − 2.3 4.0 mA
Ripple Rejection RR V
IN
=5.85V, ein=2V
P
-
P
f=120Hz, Io=0.5A 53 63 − dB
Dropout Voltage ∆V
I-O
Io=1A − 1.1 1.2 V
Output Noise Voltage V
NO
V
IN
=5.85V, Io=0.5A
BW=10Hz~100kHz − 90 190 µV
Vo=3V Version
Output Voltage
V
O
V
IN
=6V, Io=0.01A
2.97
3.00
3.03 V
Line Regulation ∆Vo-V
IN
V
IN
=4.5V~9.5V, Io=1A − − 60 mV
Load Regulation ∆Vo-Io V
IN
=6V, Io=0~1A − − 60 mV
Quiescent Current I
Q
V
IN
=6V, Io=0A − 2.3 4.0 mA
Ripple Rejection RR V
IN
=6V, ein=2V
P
-
P
f=120Hz, Io=0.5A 52 62 − dB
Dropout Voltage ∆V
I-O
Io=1A − 1.1 1.2 V
Output Noise Voltage V
NO
V
IN
=6V, Io=0.5A
BW=10Hz~100kHz − 95 195 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 MIN. TYP. MAX. UNIT
Vo=3.3V Version
Output Voltage
V
O
V
IN
=6.3V, Io=0.01A
3.267
3.30
3.333 V
Line Regulation ∆Vo-V
IN
V
IN
=4.8V~9.8V, Io=1A − − 66 mV
Load Regulation ∆Vo-Io V
IN
=6.3V, Io=0~1A − − 66 mV
Quiescent Current I
Q
V
IN
=6.3V, Io=0A − 2.3 4.0 mA
Ripple Rejection RR V
IN
=6.3V, ein=2V
P
-
P
f=120Hz, Io=0.5A 52 62 − dB
Dropout Voltage ∆V
I-O
Io=1A − 1.1 1.2 V
Output Noise Voltage V
NO
V
IN
=6.3V, Io=0.5A
BW=10Hz~100kHz − 100 200 µV
Vo=3.5V Version
Output Voltage
V
O
V
IN
=6.5V, Io=0.01A
3.465
3.50
3.535 V
Line Regulation ∆Vo-V
IN
V
IN
=5V~10V, Io=1A − − 70 mV
Load Regulation ∆Vo-Io V
IN
=6.5V, Io=0~1A − − 70 mV
Quiescent Current I
Q
V
IN
=6.5V, Io=0A − 2.3 4.0 mA
Ripple Rejection RR V
IN
=6.5V, ein=2V
P
-
P
f=120Hz, Io=0.5A 52 62 − dB
Dropout Voltage ∆V
I-O
Io=1A − 1.1 1.2 V
Output Noise Voltage V
NO
V
IN
=6.5V, Io=0.5A
BW=10Hz~100kHz − 105 205 µV
Vo=5V Version
Output Voltage
V
O
V
IN
=8V, Io=0.01A
4.95
5.00
5.05 V
Line Regulation ∆Vo-V
IN
V
IN
=6.5V~9.5V, Io=1A − − 60 mV
Load Regulation ∆Vo-Io V
IN
=8V, Io=0~1A − − 100 mV
Quiescent Current I
Q
V
IN
=8V, Io=0A − 2.3 4.0 mA
Ripple Rejection RR V
IN
=8V, ein=2V
P
-
P
f=120Hz, Io=0.5A 50 60 − dB
Dropout Voltage ∆V
I-O
Io=1A − 1.1 1.2 V
Output Noise Voltage V
NO
V
IN
=8V, Io=0.5A
BW=10Hz~100kHz − 150 260 µV
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
0.1µF
I
IN
10µF
I
OUT
V
OUT
V
A
+ +
A
BPF
V
NO
V.V
RL
2.Ripple Rejection
NJM2391
V
IN
V
IN
V
OUT
GND
0.1µF 10µF
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~+85°C,Tj=125°C,P
D
=8W(T
C
=25°C),P
D
=0.8W(Ta=25°C))
0
2
4
6
8
10
-50 -25 0 25 50 75 100
Ambient Temperature Ta(°C)
Power Dissipation P
D
(W)
∞ Heat Sink
W ithout Heat Sink
θ
HS
=5°C/W
θ
HS
=20°C/W
θ
HS
=10°C/W
NJM2391
■ELECTRICAL CHARACTERISTICS
NJM2391
■ELECTRICAL CHARACTERISTICS
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.
