NJM2888
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJM2888 is a low dropout voltage regulator with ON/OFF
control.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
Small packaging, 1.0µF small decoupling capacitor and built-in
noise bypass capacitor less make the NJM2888 suitable for space
conscious applications.
PACKAGE OUTLINE
NJM2888KF1
NJM2888F
FEATURES
High Ripple Rejection
75dB typ. (f=1kHz, Vo=3V Version)
Low Output Noise Voltage Vno=45µVrms typ.
Output capacitor with 1.0µF ceramic capacitor (Vo≥2.7V)
Output Current
Io(max.)=300mA
High Precision Output
Vo±1.0%
Low Dropout Voltage
0.10V typ. (Io=100mA)
ON/OFF Control
Internal Thermal Overload Protection
Internal Short Circuit Current Limit
Bipolar Technology
Package Outline
SOT-23-5(NJM2888F) / ESON4(NJM2888KF1)
PIN CONFIGURATION
5
4
1 2 3
1.
2.
3.
4.
5.
CONTROL (Active High)
GND
N.C.
V
OUT
V
IN
4 3
1.
2.
3.
4.
V
OUT
GND
CONTROL
V
IN
1 2
NJM2888F
EQUIVALENT CIRCUIT
V
IN
CONTROL
NJM2888KF1
V
OUT
Thermal
Protection
Bandgap
Reference
GND
Ver.2008-11-12
-1-
NJM2888
OUTPUT VOLTAGE RANK LIST
The WHITE column shows applicable Voltage Rank(s)
Device Name
NJM2888F15
NJM2888F16
NJM2888F17
NJM2888F18
NJM2888F19
NJM2888F02
NJM2888F21
NJM2888F22
NJM2888F23
NJM2888F24
NJM2888F25
NJM2888F26
NJM2888F27
NJM2888F28
NJM2888F29
NJM2888F03
NJM2888F31
NJM2888F32
NJM2888F33
NJM2888F34
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
NJM2888F35
NJM2888F36
NJM2888F37
NJM2888F38
NJM2888F39
NJM2888F04
NJM2888F41
NJM2888F42
NJM2888F43
NJM2888F44
NJM2888F45
NJM2888F46
NJM2888F47
NJM2888F48
NJM2888F49
NJM2888F05
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
NJM2888KF1-15
NJM2888KF1-16
NJM2888KF1-17
NJM2888KF1-18
NJM2888KF1-19
NJM2888KF1-02
NJM2888KF1-21
NJM2888KF1-22
NJM2888KF1-23
NJM2888KF1-24
NJM2888KF1-25
NJM2888KF1-26
NJM2888KF1-27
NJM2888KF1-28
NJM2888KF1-29
NJM2888KF1-03
NJM2888KF1-31
NJM2888KF1-32
NJM2888KF1-33
NJM2888KF1-34
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
NJM2888KF1-35
NJM2888KF1-36
NJM2888KF1-37
NJM2888KF1-38
NJM2888KF1-39
NJM2888KF1-04
NJM2888KF1-41
NJM2888KF1-42
NJM2888KF1-43
NJM2888KF1-44
NJM2888KF1-45
NJM2888KF1-46
NJM2888KF1-47
NJM2888KF1-48
NJM2888KF1-49
NJM2888KF1-05
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
-2-
Ver.2008-11-12
NJM2888
RATINGS
+10
+10
350(*1)
SOT-23-5
200(*2)
Power Dissipation
P
D
mW
150(*3)
ESON4
800(*4)
Operating Temperature
Topr
-40
∼
+85
°C
Storage Temperature
Tstg
-40
∼
+125
°C
(*1): Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers FR-4)
(*2): Device itself.
(*3): Mounted on glass epoxy board based on EIA/JEDEC. (101.5
×
114.5
×
1.6mm: 2Layers)
(*4): Mounted on glass epoxy board based on EIA/JEDEC.
(101.5
×
114.5
×
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=1.0µF: Vo≥2.7V (Co=2.2µF : 1.8V<Vo≤2.6V, Co=4.7µF : Vo≤1.8V), Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP. MAX. UNIT
−
Output Voltage
Vo
Io=30mA
-1.0%
+1.0%
V
Io=0mA, Except I
CONT
−
Quiescent Current
I
Q
130
195
µA
Quiescent Current
V
CONT
=0V
−
−
100
nA
I
Q(OFF)
at Control OFF
Vo - 0.3V
−
Output Current
Io
300
400
mA
V
IN
=Vo+1V
∼
Vo+6V (Vo≤3V Version),
−
−
Line Regulation
0.10
%/V
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
9V (Vo>3V Version),
Io=30mA
−
−
Load Regulation
0.009 %/mA
∆Vo/∆Io
Io=0
∼
300mA
Io=100mA
−
Dropout Voltage (*5)
0.10
0.18
V
∆V
I-O
ein=200mVrms, f=1kHz, Io=10mA,
−
−
Ripple Rejection
RR
75
dB
Vo=3V Version
Average Temperature
Ta=0
∼
85°C, Io=10mA
−
−
Coefficient of Output
∆Vo/∆Ta
±
50
ppm/°C
Voltage
f=10Hz
∼
80kHz, Io=10mA,
−
−
Output Noise Voltage
V
NO
45
µVrms
Vo=3V Version
V
CONT
=1.6V
Control Current
−
I
CONT
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
(*5): 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.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
(Ta=25°C)
UNIT
V
V
Ver.2008-11-12
-3-
NJM2888
TEST CIRCUIT
I
IN
A
V
IN
V
IN
V
OUT
*6
1.0µF
0.1µF
I
CONT
NJM2888
(Ceramic)
I
OUT
V
V
OUT
A
V
V
CONT
CONTROL
GND
*6: 1.8<Vo≤ 2.6V version : Co=2.2µF (Ceramic)
Vo
≤
1.8V version : Co=4.7µF (Ceramic)
TYPICAL APPLICATION
1
In the case where ON/OFF Control is not required:
V
IN
0.1µF
V
IN
V
OUT
*7
V
OUT
1.0µF
NJM2888
R
CONTROL
GND
*7: 1.8<Vo≤ 2.6V version : Co=2.2µF
Vo
≤
1.8V version : Co=4.7µF
Connect control terminal to V
IN
terminal
-4-
Ver.2008-11-12
NJM2888
2
In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
*7
V
OUT
1.0µF
0.1µF
R
NJM2888
CONTROL
GND
*7: 1.8<Vo≤ 2.6V version : Co=2.2µF
Vo
≤
1.8V version : Co=4.7µF
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.
Ver.2008-11-12
-5-
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