NJM2881/82
LOW DROPOUT VOLTAGE REGULATOR
s
GENERAL DESCRIPTION
The NJM2881/82 is a low dropout voltage regulator designed
for portable applications.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
s
PACKAGE OUTLINE
NJM2881F
NJM2882F
s
FEATURES
qHigh
Ripple Rejection
75dB typ. (f=1kHz)
qOutput
Noise Voltage
Vno=30µVrms (Cp=0.01µF)
qOutput
capacitor with 1.0uF ceramic capacitor (Vo≥2.7V)
qOutput
Current
Io(max.)=300mA
qHigh
Precision Output
Vo±1%
qLow
Dropout Voltage
0.10V typ. (Io=100mA)
qON/OFF
Control
(Active High)
qOperating
Voltage Range
+2.3V∼+6V (Vo≤2.0V version)
qInternal
Short Circuit Current Limit
qInternal
Thermal Overload Protection
qBipolar
Technology
qPackage
Outline
MTP5 (MTP5:2.8×2.9×1.1mm)
s
PIN CONFIGURATION
1
2
3
4
5
NJM2881F
PIN FUNCTION
5
1. CONTROL (Active High)
1
2
2. GND
3. NOISE BYPASS
3
4
4. V
OUT
5. V
IN
NJM2882F
PIN FUNCTION
1.V
IN
2.GND
3.CONTROL (Active High)
4.NOISE BYPASS
5.V
OUT
s
EQUIVALENT CIRCUIT
V
IN
Cont
Thermal
Protection
V
OUT
Noise
Bypass
Bandgap
Reference
GND
Ver.2003-03-12
-1-
NJM2881/82
s
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
(Ta=25°C)
RATINGS
UNIT
+14
V
+14(note 1)
V
200(note 2)
Power Dissipation
P
D
mW
350(note 3)
Operating Temperature
Topr
−40 ∼
+85
°C
Storage Temperature
Tstg
−40 ∼
+125
°C
(note 1) When input voltage is less than +14V, the absolute maximum control
voltage is equal to the input voltage.
(note 2)Device itself.
(note 3)On board. 76.2×114.3×1.6mm (Double layer, FR-4)
s
ELECTRICAL CHARACTERISTICS
(Vo>2.0V version : V
IN
=Vo+1V, C
IN
=0.1µF, Co=1.0µF: Vo≥2.7V (Co=2.2µF: Vo≤2.6V), Cp=0.01µF, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX.
Io=30mA
Output Voltage
Vo
-1.0%
+1.0%
−
Io=0mA, expect Icont
Quiescent Current
120
180
I
Q
−
Quiescent Current
V
CONT
=0V
100
I
Q(OFF)
−
−
at Control OFF
Output Current
Io
300
400
-
Vo−0.3V
Line Regulation
0.10
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
−
−
Load Regulation
0.03
∆Vo/∆Io
Io=0
∼
300mA
−
−
Dropout Voltage
Io=100mA
0.10
0.18
∆V
I−O
−
ein=200mVrms,f=1kHz, Io=10mA,
Ripple Rejection
RR
75
−
−
Vo=3V Version
Average Temperature
∆Vo/∆Ta
Ta=0∼+85°C, Io=10mA
±50
−
−
Coefficient of Output Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
V
NO
30
−
−
Vo=3V Version
Control Voltage for ON-state
1.6
V
CONT(ON)
−
−
Control Voltage for OFF-state
0.6
V
CONT(OFF)
−
−
(Vo≤2.0V version : V
IN
=Vo+1V, C
IN
=0.1µF, Co=2.2µF: Vo≥1.9V (Co=4.7µF: Vo≤1.8V), Cp=0.01µF, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX.
Io=30mA
Output Voltage
Vo
-1.0%
+1.0%
−
Io=0mA, expect Icont
Quiescent Current
120
180
I
Q
−
Quiescent Current
V
CONT
=0V
100
I
Q(OFF)
−
−
at Control OFF
Output Current
Io
300
400
-
Vo−0.3V
Line Regulation
0.10
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
−
−
Load Regulation
0.03
∆Vo/∆Io
Io=0
∼
300mA
−
−
ein=200mVrms, f=1kHz, Io=10mA,
Ripple Rejection
RR
80
−
−
Vo=1.8V Version
Average Temperature
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
±50
−
−
Coefficient of Output Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
V
NO
20
−
−
Vo=1.8V Version
Control Voltage for ON-state
1.6
V
CONT(ON)
−
−
Control Voltage for OFF-state
0.6
V
CONT(OFF)
−
−
(note 4) The above specification is a common specification for all output voltages.
Therefore, it may be different from the individual specification for a specific output voltage.
UNIT
V
µA
nA
mA
%/V
%/mA
V
dB
ppm/°C
µVrms
V
V
UNIT
V
µA
nA
mA
%/V
%/mA
dB
ppm/°C
µVrms
V
V
-2-
Ver.2003-03-12
NJM2881/82
s
OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
1.8V
NJM288×F18
2.5V
NJM288×F25
2.8V
NJM288×F28
3.0V
NJM288×F03
3.3V
NJM288×F33
s
TEST CIRCUIT
A
V
IN
I
IN
V
IN
V
OUT
I
OUT
0.1uF
1.0uF
(ceramic)
*note1
V
V
OUT
A
V
V
CONT
I
CONT
CONTROL
GND
NOISE
BYPASS
Cp=0.01uF
*note1
1.9V
≤
Vo
≤
2.6V version : Co=2.2uF(ceramic)
Vo
≤
1.8V version : Co=4.7uF(ceramic)
s
TYPICAL APPLICATION
x
In case that ON/OFF Control is not required:
V
IN
V
IN
0.1uF
V
OUT
V
OUT
1.0uF
*note1
(ceramic)
R
(0
∼
300kΩ)
CONTROL
GND
NOISE
BYPASS
Cp=0.01uF
*
note1 1.9V
≤
Vo
≤
2.6V version : Co=2.2uF(ceramic)
Vo
≤
1.8V version : Co=4.7uF(ceramic)
Connect control terminal to V
IN
terminal
The quiescent current can be reduced by using a resistance “R”. Instead, it increases the minimum operating
voltage. For further information, please refer to Figure “Output Voltage vs. Control Voltage”.
Ver.2003-03-12
-3-
NJM2881/82
y
In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
V
OUT
0.1uF
R
CONTROL
GND
NOISE
BYPASS
1.0uF
*note1
(ceramic)
Cp=0.01uF
*
note1 1.9V
≤
Vo
≤
2.6V version : Co=2.2uF(ceramic)
Vo
≤
1.8V version : Co=4.7uF(ceramic)
State of control terminal:
•“H”→
output is enabled.
•
“L” or “open”
→
output is disabled.
✱Noise
bypass Capacitance Cp
Noise bypass capacitance Cp reduces noise generated by band-gap reference circuit.
Noise level and ripple rejection will be improved when larger Cp is used.
Use of smaller Cp value may cause oscillation.
Use the Cp value of 0.01uF greater to avoid the problem.
-4-
Ver.2003-03-12
NJM2881/82
[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.2003-03-12
-5-
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