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.
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 Current
Io(max.)=150mA
High Precision Output
Vo
±1.0%
Output capacitor with 0.47µF ceramic capacitor(Vo≥2.7V Version)
Low Dropout Voltage
0.10V typ. (Io=60mA)
ON/OFF Control
(Active High)
Internal Thermal Overload Protection
Internal Short Circuit Current Limit
Bipolar Technology
Package Outline
SC-88A
PACKAGE OUTLINE
NJM2877F3
PIN CONFIGURATION
5
4
1 2 3
1. CONTROL
2. GND
3. NOISE BYPASS
4. V
OUT
5. V
IN
NJM2877F3
EQUIVALENT CIRCUIT
V
IN
Control
Bandgap
Reference
Thermal
Protection
Noise
Bypass
V
OUT
GND
Ver.2007-01-18
-1-
NJM2877
OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
NJM2877F3 -15
1.5V
NJM2877F3 -18
1.8V
NJM2877F3 -21
2.1V
NJM2877F3 -22
2.2V
NJM2877F3 -23
2.3V
NJM2877F3 -24
2.4V
NJM2877F3 -25
2.5V
NJM2877F3 -255
2.55V
Device Name
NJM2877F3 -28
NJM2877F3 -285
NJM2877F3 -29
NJM2877F3 -03
NJM2877F3 -31
NJM2877F3 -32
NJM2877F3 -33
NJM2877F3 -345
V
OUT
2.8V
2.85V
2.9V
3.0V
3.1V
3.2V
3.3V
3.45V
Device Name
NJM2877F3 -355
NJM2877F3 -36
NJM2877F3 -04
NJM2877F3 -42
NJM2877F3 -45
NJM2877F3 -46
NJM2877F3 -48
NJM2877F3 -05
V
OUT
3.55V
3.6V
4.0V
4.2V
4.5V
4.6V
4.8V
5.0V
Output voltage options available : 1.5 ~ 5.0V (0.1V step)
(Ta=25°C)
RATINGS
UNIT
+10
V
+10(*1)
V
250(*2)
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. (114.3x76.2x1.6mm: 2Layers)
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)
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
Power Dissipation
P
D
Operating Temperature
Topr
Storage Temperature
Tstg
PARAMETER
Output Voltage
Input Voltage
Quiescent Current
Quiescent Current
at Control OFF
Output Current
Line Regulation
Load Regulation
Dropout Voltage (*3)
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
V
V
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
(*3): 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.
-2-
Ver.2007-01-18
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 APPLICATION
1
In the case where ON/OFF Control is not required:
V
IN
V
IN
0.1µF
V
OUT
V
OUT
NJM2877
0.47µF
*5
R
(0
∼
300kΩ)
CONTROL
GND
NOISE
BYPASS
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
Ver.2007-01-18
-3-
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.
-4-
Ver.2007-01-18
NJM2877
POWER DISSIPATION vs. AMBIENT TEMPERATURE (SC-88A)
NJM2877F3 Power Dissipation
(Topr=-40~+85°C,Tj=125°C)
500
Power Dissipation P
D
(mW)
400
300
200
100
0
-50
-25
0
25
50
75
100
On Board(114.3×76.2×1.6mm, FR-4)
Ambient Temperature Ta(°C)
Ver.2007-01-18
-5-
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