NJM2890
2ch LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJM2890 is a 2-channel low dropout voltage regulator
featuring a low noise, high precision of ±1.0%, high ripple
rejection ratio of 70dB, and 150mA output current (all both
outputs). It also offers useful functions of an ON/OFF control,
thermal overload protection and short circuit current limit,
and it can use ceramic capacitor of 1µF as an output
capacitor. The NJM2890 is available in a small and thin
surface mount 10-lead MSOP (VSP) package. It is suitable
for various portable devices.
PACKAGE OUTLINE
NJM2890R
(MSOP10 (VSP10))
FEATURES
High Ripple Rejection
70dB typ. (f=1kHz,Vo=3V Version)
Output Noise Voltage
Vno=30µVrms typ.(Cp=0.01µF)
Output capacitor with 1.0uF ceramic capacitor (Vo≥2.7V)
Output Current
Io(max.)=150mA
×
2ch
High Precision Output
Vo±1.0%
Low Dropout Voltage
0.10V typ. (Io=60mA)
Operating Voltage Range +2.5V to +14V (Vo≤2.0V version)
ON/OFF Control
(Active High)
Internal Short Circuit Current Limit
Internal Thermal Overload Protection
Bipolar Technology
Package Outline
MSOP10 (VSP10)*
*MEET JEDEC MO-187-DA
PIN CONFIGURATION
10 9 8 7 6
PIN FUNCTION
1. CONTROL1 6. NOISE BYPASS2
2. V
IN
1
7. V
OUT
2
3. GND
8. GND
4. V
IN
2
9. V
OUT
1
5. CONTROL2 10. NOISE BYPASS1
1 2 3 4 5
NJM2890R
EQUIVALENT CIRCUIT
V
IN
1/ V
IN
2
Cont1/Cont2
Thermal
Protection
Bandgap
Reference
Noise Bypass1 /
Noise Bypass2
V
OUT
1/ V
OUT
2
GND
NJM2890
OUTPUT VOLTAGE RANK LIST
Device Name
Vout
CH1
NJM2890R2121
2.1V
NJM2890R2727
2.7V
NJM2890R2818
2.8V
NJM2890R2828
2.8V
NJM2890R0318
3.0V
NJM2890R0303
3.0V
NJM2890R3325
3.3V
NJM2890R3326
3.3V
NJM2890R3333
3.3V
NJM2890R0403
4.0V
NJM2890R0521
5.0V
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
Power Dissipation
P
D
Operating Temperature
Topr
Storage Temperature
Tstg
CH2
2.1V
2.7V
1.8V
2.8V
1.8V
3.0V
2.5V
2.6V
3.3V
3.0V
2.1V
(Ta=25°C)
RATINGS
UNIT
+14
V
+14(*1)
V
320
mW
−40
to +85
°C
−40
to +125
°C
(*1) When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage.
OPERATING RANGE
V
IN
=+2.5V to +14.0V (In case of Vo<2.1V version)
NJM2890
ELECTRICAL CHARACTERISTICS
(Vo>2.0V version :
1CH/2CH : V
IN
=Vo+1V, C
IN
=0.1µF, Co=1.0uF: Vo≥2.7V (Co=2.2uF: Vo≤2.6V), Cp=0.01µF, Ta=25°C)
PARAMETER
Output Voltage
Quiescent Current
Quiescent Current
at Control OFF
Output Current
Line Regulation
Load Regulation
Dropout Voltage
Ripple Rejection
Average Temperature
Coefficient of Output Voltage
Output Noise Voltage
Control Voltage for ON-state
Control Voltage for OFF-state
SYMBOL
Vo
I
Q
I
Q(OFF)
Io
∆Vo/∆V
IN
∆Vo/∆Io
∆V
I
−
O
RR
∆Vo/∆Ta
V
NO
V
CONT(ON)
V
CONT(OFF)
Io=30mA
Io=0mA, expect Icont
V
CONT
=0V
Vo−0.3V
V
IN
=Vo+1V to Vo+6V, Io=30mA
Io=0 to 100mA
Io=60mA
ein=200mVrms,f=1kHz, Io=10mA,
Vo=3V Version
Ta=0 to 85°C, Io=10mA
f=10Hz to 80kHz, Io=10mA,
Vo=3V Version
TEST CONDITION
MIN.
-1.0%
−
−
150
−
−
−
−
−
−
1.6
−
TYP.
−
120
−
200
−
−
0.10
70
±50
30
−
−
MAX.
+1.0%
180
100
-
0.10
0.03
0.18
−
−
−
−
0.6
UNIT
V
µA
nA
mA
%/V
%/mA
V
dB
ppm/°C
µVrms
V
V
(Vo≤2.0V version :
1CH/2CH : V
IN
=Vo+1V, C
IN
=0.1µF, Co=2.2uF, Cp=0.01µF, Ta=25°C)
PARAMETER
Output Voltage
Quiescent Current
Quiescent Current
at Control OFF
Output Current
Line Regulation
Load Regulation
Ripple Rejection
Average Temperature
Coefficient of Output Voltage
Output Noise Voltage
Control Voltage for ON-state
Control Voltage for OFF-state
SYMBOL
Vo
I
Q
I
Q(OFF)
Io
∆Vo/∆V
IN
∆Vo/∆Io
RR
∆Vo/∆Ta
V
NO
V
CONT(ON)
V
CONT(OFF)
Io=30mA
Io=0mA, expect Icont
V
CONT
=0V
Vo−0.3V
V
IN
=Vo+1V to Vo+6V, Io=30mA
Io=0 to 100mA
ein=200mVrms,f=1kHz, Io=10mA,
Vo=1.8V Version
Ta=0 to 85°C, Io=10mA
f=10Hz to 80kHz, Io=10mA,
Vo=1.8V Version
TEST CONDITION
MIN.
-1.0%
−
−
150
−
−
−
−
−
1.6
−
TYP.
−
120
−
200
−
−
75
±50
22
−
−
MAX.
+1.0%
180
100
-
0.10
0.03
−
−
−
−
0.6
UNIT
V
µA
nA
mA
%/V
%/mA
dB
ppm/°C
µVrms
V
V
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.
NJM2890
TEST CIRCUIT
A
I
CONT
1
V
CONT
1
V
Cp=0.01
µ
F
CONTROL
NOISE
BYPASS1
A
I
IN
1
V
IN
1
0.1
µ
F
V
IN
1
V
OUT
1
1.0
µ
F
*2
(Ceramic)
I
OUT
1
V
OUT
1
V
NJM2890
GND
GND
A
I
IN
2
V
IN
2
0.1
µ
F
V
IN
2
V
OUT
2
1.0
µ
F
*2
(Ceramic)
NOISE
BYPASS2
I
OUT
2
V
OUT
2
V
A
I
CONT
2
V
CONT
2
CONTROL
V
Cp=0.01
µ
F
*2
Vo
≤
2.6V version: Co=2.2
µ
F(ceramic)
NJM2890
TYPICAL APPLICATION
1
In the case where ON/OFF Control is not required:
CONTROL
R
(0
∼
300k
Ω
)
NOISE
BYPASS1
Cp=0.01µF
V
IN
1
V
IN
1
V
OUT
1
1.0
µ
F
*3
V
OUT
1
0.1
µ
F
NJM2890
GND
GND
V
IN
2
V
IN
2
V
OUT
2
V
OUT
2
1.0
µ
F
*3
0.1
µ
F
R
(0
∼
300k
Ω
)
CONTROL
NOISE
BYPASS2
Cp=0.01µF
*3
Vo
≤
2.6V version: Co=2.2
µ
F
Connect control terminal to V
IN
terminal
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