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
zOutput Current Io(max.)=1A
zHigh Precision Output Voltage Vo±1%
zLow Dropout Voltage ∆ V
I-O
=1.1V typ. At Io=1A
zInternal Excessive Voltage Protection Circuit
zInternal Short Circuit Current Limit
zInternal Thermal Overload Protection
zBipolar Technology
zPackage 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
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.
