NJM2877
Low Dropout Voltage Regulator
GENERAL DESCRIPTION
The NJM2877 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.
Package line-up is very small package: SC88A and standard
package: SOT23-5.
Small packaging and 0.47µF small decoupling capacitor make the
NJM2877 suitable for space conscious applications.
FEATURES
High Ripple Rejection
75dB typ. (f=1kHz Vo=3V version)
Output Noise Voltage
Vno=30µVrms typ. (Cp=0.01µF)
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, SOT23-5
PACKAGE OUTLINE
NJM2877F
NJM2877F3
PIN CONFIGURATION
5
4
1 2 3
1.
2.
3.
4.
5.
CONTROL
GND
NOISE BYPASS
V
OUT
V
IN
5
4
1 2 3
1.
2.
3.
4.
5.
CONTROL
GND
NOISE BYPASS
V
OUT
V
IN
NJM2877F
EQUIVALENT CIRCUIT
V
IN
Control
Bandgap
Reference
NJM2877F3
V
OUT
Thermal
Protection
Noise
Bypass
GND
Ver.2011-04-01
-1-
NJM2877
OUTPUT VOLTAGE RANK LIST
SC88A Package
Device Name
NJM2877F3 -15
NJM2877F3 -18
NJM2877F3 -21
NJM2877F3 -22
NJM2877F3 -23
NJM2877F3 -24
NJM2877F3 -25
NJM2877F3 -255
NJM2877F3 -26
NJM2877F3 -27
NJM2877F3 -28
NJM2877F3 -285
NJM2877F3 -29
NJM2877F3 -03
NJM2877F3 -31
NJM2877F3 -32
SOT23-5 Package
V
out
1.5V
1.8V
2.1V
2.2V
2.3V
2.4V
2.5V
2.55V
2.6V
2.7V
2.8V
2.85V
2.9V
3.0V
3.1V
3.2V
Device Name
NJM2877F3 -33
NJM2877F3 -34
NJM2877F3 -345
NJM2877F3 -35
NJM2877F3 -355
NJM2877F3 -36
NJM2877F3 -38
NJM2877F3 -04
NJM2877F3 -42
NJM2877F3 -45
NJM2877F3 -46
NJM2877F3 -47
NJM2877F3 -48
NJM2877F3 -05
V
out
3.3V
3.4V
3.45V
3.5V
3.55V
3.6V
3.8V
4.0V
4.2V
4.5V
4.6V
4.7V
4.8V
5.0V
Device Name
NJM2877F15
NJM2877F28
NJM2877F03
NJM2877F33
NJM2877F05
V
out
1.5V
2.8V
3.0V
3.3V
5.0V
-2-
Ver.2011-04-01
NJM2877
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
SC88A
Power Dissipation
Operating Temperature
Storage Temperature
P
D
Topr
Tstg
SOT23-5
RATINGS
+10
+10(*1)
250(*2)
350(*2)
200(*3)
(Ta=25
°
C)
UNIT
V
V
mW
−
40
∼
+85
°
C
−
40
∼
+125
°
C
(*1): When input voltage is less than +10V, the absolute maximum control voltage is equal to the input voltage.
(*2): Mounted on glass epoxy board based on EIA/JEDEC. (114.3
×
76.2
×
1.6mm: 2Layers FR-4)
(*3): Device itself.
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), Cp=0.01µF, Ta=25°C)
PARAMETER
Output Voltage
Input Voltage
Quiescent Current
Quiescent Current
at Control OFF
Output Current
Line Regulation
Load Regulation
Dropout Voltage (*4)
Ripple Rejection
Average Temperature
Coefficient of Output
Voltage
Output Noise Voltage
Control Current
Control Voltage for ON-state
Control Voltage for OFF-state
SYMBOL
Vo
V
IN
I
Q
I
Q(OFF)
Io
∆Vo/∆V
IN
∆Vo/∆Io
∆V
I
−
O
RR
∆Vo/∆Ta
V
NO
I
CONT
V
CONT(ON)
V
CONT(OFF)
Io=30mA
TEST CONDITION
MIN.
-1.0%
−
−
−
150
−
−
−
−
−
−
−
1.6
−
TYP.
−
−
120
−
200
−
−
0.10
75
±
50
30
3
−
−
MAX.
+1.0%
9
180
100
−
0.10
0.03
0.18
−
−
−
12
−
0.6
UNIT
V
V
µA
nA
mA
%/V
%/mA
V
dB
ppm/°C
µVrms
µA
Io=0mA, except Icont
V
CONT
=0V
Vo - 0.3V
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
Io=0
∼
100mA
Io=60mA
ein=200mVrms, f=1kHz, Io=10mA,
Vo=3V version
Ta=0
∼
+85°C, Io=10mA
f=10Hz∼80kHz, Io=10mA, Vo=3V Version
V
CONT
=1.6V
V
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.2011-04-01
-3-
NJM2877
TEST CIRCUIT
I
IN
A
V
IN
V
IN
V
OUT
I
OUT
0.1µF
NJM2877
0.47µF
(Ceramic)
*4
V
V
OUT
A
V
V
CONT
I
CONT
CONTROL
GND
NOISE
BYPASS
Cp=0.01µF
*4: 1.8V<Vo
≤
2.6V version: Co=1.0µF(Ceramic)
Vo
≤
1.8V version: Co=2.2µF(Ceramic)
TYPICAL APPLICATIONS
1
In the case where ON/OFF Control is not required:
V
IN
V
IN
0.1µF
V
OUT
V
OUT
NJM2877
R
CONTROL
GND
NOISE
BYPASS
0.47µF
*5
Cp=0.01µF
*5: 1.8V<Vo
≤
2.6V version: Co=1.0µF
Vo
≤
1.8V version: Co=2.2µF
Connect control terminal to V
IN
terminal
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Ver.2011-04-01
NJM2877
2
In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
V
OUT
0.1µF
R
NJM2877
0.47µF
*5
CONTROL
GND
NOISE
BYPASS
Cp=0.01µF
*5 : 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.
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 0.01
µ
F greater to avoid the problem.
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 0.1
µ
F 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.
Ver.2011-04-01
-5-
