NJM2878
Low Dropout Voltage Regulator
GENERAL DESCRIPTION
The NJM2878 is a 150mA output low dropout voltage regulator
with ON/OFF control.
Advanced bipolar technology achieves low noise, high ripple
rejection, high accuracy and low quiescent current.
Small packaging (SC-88A/SC82AB) and very small packaging
(ESON4), 0.47µF small decoupling capacitor and built-in noise
bypass capacitor make the NJM2878 suitable for space conscious
applications.
PACKAGE OUTLINE
NJM2878F3
NJM2878F4
NJM2878KF1
FEATURES
High Ripple Rejection
75dB typ. (f=1kHz Vo=3V version)
Output Noise Voltage
Vno=45µVrms typ.
Output capacitor with 0.47µF ceramic capacitor(Vo≥2.7V Version)
Output Current
Io(max.)=150mA
High Precision Output
Vo
±1.0%
Low Dropout Voltage
0.10V typ. (Io=60mA)
ON/OFF Control
(Active High)
Internal Thermal Overload Protection
Internal Over Current Protection
Bipolar Technology
Package Outline
SC88A(NJM2878F3) / SC82AB(NJM2878F4) ) / ESON4-F1(NJM2878KF1)
PIN CONFIGURATION
5
4
1 2 3
1.
2.
3.
4.
5.
CONTROL
GND
NC
V
OUT
V
IN
4
3
1
2
1.
2.
3.
4.
CONTROL
GND
V
OUT
V
IN
4 3
1.
2.
3.
4.
V
OUT
GND
CONTROL
V
IN
1 2
NJM2878F3
EQUIVALENT CIRCUIT
V
IN
Control
NJM2878F4
NJM2878KF1
V
OUT
Thermal
Protection
Bandgap
Reference
GND
Ver.2008-11-12
-1-
NJM2878
OUTPUT VOLTAGE RANK LIST
The WHITE column shows applicable Voltage Rank(s)
Device Name
NJM2878F3/F4-15
NJM2878F3/F4-16
NJM2878F3/F4-17
NJM2878F3/F4-18
NJM2878F3/F4-19
NJM2878F3/F4-02
NJM2878F3/F4-21
NJM2878F3/F4-22
NJM2878F3/F4-23
NJM2878F3/F4-24
NJM2878F3/F4-25
NJM2878F3/F4-26
NJM2878F3/F4-27
NJM2878F3/F4-28
NJM2878F3/F4-29
NJM2878F3/F4-03
NJM2878F3/F4-31
NJM2878F3/F4-32
NJM2878F3/F4-33
NJM2878F3/F4-34
V
out
1.5V
1.6V
1.7V
1.8V
1.9V
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
Device Name
NJM2878F3/F4-35
NJM2878F3/F4-36
NJM2878F3/F4-37
NJM2878F3/F4-38
NJM2878F3/F4-39
NJM2878F3/F4-04
NJM2878F3/F4-41
NJM2878F3/F4-42
NJM2878F3/F4-43
NJM2878F3/F4-44
NJM2878F3/F4-45
NJM2878F3/F4-46
NJM2878F3/F4-47
NJM2878F3/F4-48
NJM2878F3/F4-49
NJM2878F3/F4-05
V
out
3.5V
3.6V
3.7V
3.8V
3.9V
4.0V
4.1V
4.2V
4.3V
4.4V
4.5V
4.6V
4.7V
4.8V
4.9V
5.0V
The WHITE column shows applicable Voltage Rank(s)
Device Name
NJM2878KF1-15
NJM2878KF1-16
NJM2878KF1-17
NJM2878KF1-18
NJM2878KF1-19
NJM2878KF1-02
NJM2878KF1-21
NJM2878KF1-22
NJM2878KF1-23
NJM2878KF1-24
NJM2878KF1-25
NJM2878KF1-26
NJM2878KF1-27
NJM2878KF1-28
NJM2878KF1-29
NJM2878KF1-03
NJM2878KF1-31
NJM2878KF1-32
NJM2878KF1-33
NJM2878KF1-34
V
out
1.5V
1.6V
1.7V
1.8V
1.9V
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
Device Name
NJM2878KF1-35
NJM2878KF1-36
NJM2878KF1-37
NJM2878KF1-38
NJM2878KF1-39
NJM2878KF1-04
NJM2878KF1-41
NJM2878KF1-42
NJM2878KF1-43
NJM2878KF1-44
NJM2878KF1-45
NJM2878KF1-46
NJM2878KF1-47
NJM2878KF1-48
NJM2878KF1-49
NJM2878KF1-05
V
out
3.5V
3.6V
3.7V
3.8V
3.9V
4.0V
4.1V
4.2V
4.3V
4.4V
4.5V
4.6V
4.7V
4.8V
4.9V
5.0V
NJM2878
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
Power Dissipation
Operating Temperature
Storage Temperature
P
D
Topr
Tstg
RATINGS
+10
+10
SC88A/SC82AB 250(*1)
150(*2)
ESON4
800(*3)
−40 ∼
+85
−40 ∼
+125
(Ta=25°C)
UNIT
V
V
mW
°C
°C
(*1): Mounted on glass epoxy board based on EIA/JEDEC. (114.3
×
76.2
×
1.6mm: 2Layers FR-4)
(*2): Mounted on glass epoxy board based on EIA/JEDEC. (101.5
×
114.57
×
1.6mm: 2Layers)
(*3): Mounted on glass epoxy board based on EIA/JEDEC.
(101.5
×
114.57
×
1.6mm: 4Layers Internal foil area: 99.5
×
99.5mm)
Operating voltage
V
IN
=+2.3
∼
+9V (In case of Vo<2.1V version)
ELECTRICAL CHARACTERISTICS
(V
IN
=Vo+1V, C
IN
=0.1µF, Co=0.47µF: Vo≥2.7V (Co=1.0µF : 1.8V<Vo≤2.6V, Co=2.2µF : Vo≤1.8V), Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX. UNIT
Output Voltage
Vo
Io=30mA
-1.0%
+1.0%
V
−
Quiescent Current
I
Q
Io=0mA, except Icont
140
195
µA
−
Quiescent Current
V
CONT
=0V
100
nA
I
Q(OFF)
−
−
at Control OFF
Output Current
Io
Vo - 0.3V
150
200
mA
−
V
IN
=Vo+1V
∼
Vo+6V(Vo≤3V),
0.10
%/V
Line Regulation
∆Vo/∆V
IN
−
−
V
IN
=Vo+1V
∼
9V(Vo>3V), Io=30mA
Load Regulation
0.016 %/mA
∆Vo/∆Io
Io=0
∼
100mA
−
−
Dropout Voltage (*4)
Io=60mA
0.10
0.18
V
∆V
I−O
−
ein=200mVrms, f=1kHz, Io=10mA,
Ripple Rejection
RR
75
dB
−
−
Vo=3V version
Average Temperature
∆Vo/∆Ta
Ta=0
∼
+85°C, Io=10mA
±
50
ppm/°C
−
−
Coefficient of Output Voltage
Output Noise Voltage
V
NO1
45
µVrms
f=10Hz∼80kHz, Io=10mA, Vo=3V Version
−
−
Control Current
I
CONT
V
CONT
=1.6V
3
12
µA
−
Control Voltage for ON-state
V
CONT(ON)
1.6
V
−
−
Control Voltage for OFF-state V
CONT(OFF)
0.6
V
−
−
Input Voltage
V
IN
−
−
9
V
(*4): The output voltage excludes under 2.1V.
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.
Ver.2008-11-12
-3-
NJM2878
TEST CIRCUIT
I
IN
A
V
IN
V
IN
V
OUT
I
OUT
0.1µF
NJM2878
0.47µF
(ceramic)
*5
V
V
OUT
A
V
V
CONT
I
CONT
CONTROL
GND
*5 : 1.8V<Vo
≤
2.6V version: Co=1.0µF(Ceramic)
Vo
≤
1.8V version: Co=2.2µF(Ceramic)
TYPICAL APPLICATION
1
In the case where ON/OFF Control is not required:
V
IN
V
IN
0.1µF
V
OUT
V
OUT
NJM2878
R
CONTROL
GND
0.47µF
*6
*6 : 1.8V<Vo
≤
2.6V version: Co=1.0µF
Vo
≤
1.8V version: Co=2.2µF
Connect control terminal to V
IN
terminal
NJM2878
2
In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
V
OUT
0.1µF
R
NJM2878
0.47µF
*6
CONTROL
GND
*6 : 1.8V<Vo
≤
2.6V version: Co=1.0µF
Vo
≤
1.8V version: Co=2.2µF
State of control terminal:
•“H”→
output is enabled.
•“L”
or “open”
→
output is disabled.
Input Capacitance C
IN
Input Capacitance C
IN
is required to prevent oscillation and reduce power supply ripple for applications with high
power supply impedance or a long power supply line.
Use the C
IN
value of 0.1µF greater to avoid the problem.
C
IN
should connect between GND and V
IN
as short as possible.
In the case of using a resistance "R" between V
IN
and control.
The current flow into the control terminal while the IC is ON state (I
CONT
) can be reduced when a pull up resistance
"R" is inserted between V
IN
and the control terminal.
The minimum control voltage for ON state (V
CONT (ON)
) is increased due to the voltage drop caused by I
CONT
and the
resistance "R". The I
CONT
is temperature dependence as shown in the "Control Current vs. Temperature"
characteristics. Therefore, the resistance "R" should be carefully selected to ensure the control voltage exceeds
the V
CONT (ON)
over the required temperature range.
In the case of using a resistance "R" between V
IN
and control.
The current flow into the control terminal while the IC is ON state (I
CONT
) can be reduced when a pull up resistance
"R" is inserted between V
IN
and the control terminal.
The minimum control voltage for ON state (V
CONT (ON)
) is increased due to the voltage drop caused by I
CONT
and the
resistance "R". The I
CONT
is temperature dependence as shown in the "Control Current vs. Temperature"
characteristics. Therefore, the resistance "R" should be carefully selected to ensure the control voltage exceeds
the V
CONT (ON)
over the required temperature range.
Ver.2008-11-12
-5-
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