NJM2880
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJM2880 is a low dropout voltage regulator.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
PACKAGE OUTLINE
NJM2880U/U1
FEATURES
High Ripple Rejection
70dB typ. (f=1kHz,Vo=3V Version)
Output Noise Voltage
Vno=30µVrms typ.(Cp=0.01µF)
Output capacitor with 1.0µF ceramic capacitor
Output Current
Io(max.)=300mA
High Precision Output
Vo±1.0%
Low Dropout Voltage
0.10V typ. (Io=100mA)
ON/OFF Control
(Active High)
Internal Short Circuit Current Limit
Internal Thermal Overload Protection
Bipolar Technology
Package Outline
SOT-89-5
PIN CONFIGURATION
5
2
4
1
2
3
PIN FUNCTION
1.CONTROL (Active High)
2.GND
3.NOISE BYPASS
4.V
OUT
5.V
IN
NJM2880U/U1
EQUIVALENT CIRCUIT
V
IN
Cont
Bandgap
Reference
Thermal
Protection
Noise
Bypass
V
OUT
GND
NJM2880
OUTPUT VOLTAGE RANK LIST
Device Name
Vout
Device Name
NJM2880U/U1-15
1.5V
NJM2880U/U1-28
NJM2880U/U1-16
1.6V
NJM2880U/U1-285
NJM2880U/U1-18
1.8V
NJM2880U/U1-03
NJM2880U/U1-21
2.1V
NJM2880U/U1-32
NJM2880U/U1-25
2.5V
NJM2880U/U1-33
NJM2880U/U1-26
2.6V
NJM2880U/U1-38
NJM2880U/U1-27
2.7V
NJM2880U/U1-04
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
Power Dissipation
P
D
Operating Temperature
Topr
Storage Temperature
Tstg
Vout
2.8V
2.85V
3.0V
3.2V
3.3V
3.8V
4.0V
Device Name
NJM2880U/U1-44
NJM2880U/U1-45
NJM2880U/U1-48
NJM2880U/U1-05
Vout
4.4V
4.5V
4.8V
5.0V
(Ta=25°C)
RATINGS
UNIT
+14
V
+14(*1)
V
350
mW
-40
∼
+85
°C
-40
∼
+125
°C
(*1) When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage.
Operating voltage
V
IN
=+2.3
∼
+14V (In case of Vo<2.1V version)
ELECTRICAL CHARACTERISTICS
(Vo>2.0V version:
V
IN
=Vo+1V, Co=0.1µF: Vo≥2.7V (Co=2.2µF: Vo≤2.6V), Cp=0.01µF, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
Output Voltage
Vo
Io=30mA
-1.0%
Io=0mA, expect Icont
Quiescent Current
-
I
Q
Quiescent Current
V
CONT
=0V
-
I
Q(OFF)
at Control OFF
Vo-0.3V
Output Current
Io
300
Line Regulation
-
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
Load Regulation
-
∆Vo/∆Io
Io=0
∼
300mA
Dropout Voltage
Io=100mA
-
∆V
I
-
O
ein=200mVrms,f=1kHz, Io=10mA
Ripple Rejection
RR
-
Vo=3V Version
Average Temperature
-
Coefficient of Output
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
V
NO
-
Vo=3V Version
Control Voltage for
1.6
V
CONT(ON)
ON-state
Control Voltage for
-
V
CONT(OFF)
OFF-state
TYP.
-
120
-
400
-
-
0.10
70
±50
30
-
-
MAX. UNIT
+1.0%
V
180
µA
100
-
0.10
0.03
0.18
-
-
-
-
0.6
nA
mA
%/V
%/mA
V
dB
ppm/°C
µVrms
V
V
NJM2880
(Vo≤2.0V version:
V
IN
=Vo+1V, C
IN
=0.1µF, Co=2.2µF: Vo≥1.9V (Co=4.7µF: Vo≤1.8V), Cp=0.01µF, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP.
Output Voltage
Vo
Io=30mA
-1.0%
-
Io=0mA, expect Icont
Quiescent Current
-
120
I
Q
Quiescent Current
V
CONT
=0V
-
-
I
Q(OFF)
at Control OFF
Vo-0.3V
Output Current
Io
300
400
Line Regulation
-
-
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
Load Regulation
-
-
∆Vo/∆Io
Io=0
∼
300mA
ein=200mVrms,f=1kHz, Io=10mA
-
74
Ripple Rejection
RR
Vo=1.8V Version
Average Temperature
-
Coefficient of Output
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
±50
Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
V
NO
-
18
Vo=1.8V Version
Control Voltage for
1.6
-
V
CONT(ON)
ON-state
Control Voltage for
-
-
V
CONT(OFF)
OFF-state
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.
TEST CIRCUIT
MAX. UNIT
+1.0%
V
180
µA
100
-
0.10
0.03
-
-
-
-
0.6
nA
mA
%/V
%/mA
dB
ppm/°C
µVrms
V
V
A
V
IN
I
IN
V
IN
V
OUT
1.0µF
*2
(ceramic)
0.1µF
NJM2880
I
OUT
V
V
OUT
A
V
V
CONT
I
CONT
CONTROL
GND
NOISE
BYPASS
Cp=0.01µF
*2
1.9V≤Vo≤2.6V version : Co=2.2µF(ceramic)
Vo≤1.8V version : Co=4.7µF(ceramic)
NJM2880
TYPICAL APPLICATION
1
In the case where ON/OFF Control is not required:
V
IN
0.1µF
R
(0~300kΩ)
CONTROL
NOISE
BYPASS
V
IN
V
OUT
V
OUT
1.0
µ
F
*3
NJM2880
GND
Cp=0.01
µ
F
*3 1.9V≤Vo≤2.6V version : Co=2.2µF
Vo≤1.8V version : Co=4.7µF
Connect control terminal to V
IN
terminal
2
In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
V
OUT
1.0µF
*3
0.1
µ
F
R
NJM2880
NOISE
BYPASS
CONTROL
GND
Cp=0.01µF
*3 1.9V≤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.
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 0.01µF greater to avoid the problem.
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.
NJM2880
ELECTRICAL CHARACTERISTICS
3.2
NJM2880_3.0V
Output Voltage vs. Input Voltage
@:Ta=25 C
Co=1.0µF
(Ceramic)
Cp=0.01µF
o
4
NJM2880_3.0V
Output Voltage vs. Output Current
@:Ta=25
o
C
V
IN
=4.0V
Co=1.0µF
(Ceramic)
Cp=0.01µF
3.5
3.1
Io=0mA
3
Output Voltage : Vo(V)
Output Voltage : Vo(V)
3
3.1
3.2
3.3
3.4
3
Io=30mA
Io=100mA
2.5
2
2.9
1.5
2.8
1
0.5
2.7
2.7
2.8
2.9
0
0
100
200
300
400
500
600
Input Voltage : V
IN
(V)
Output Current : Io(mA)
20
NJM2880_3.0V
Ground Pin Current vs. Output Current
0.3
NJM2880_3.0V
Dropout Voltage vs. Output Current
@:Ta=25
o
C
V
IN
=4.0V
Co=1.0µF
(Ceramic)
Cp=0.01µF
0.25
Ground Pin Current : I (mA)
15
Dropout Voltage : dV (V)
@:Ta=25 C
V
IN
=4.0V
Co=1.0µF
(Ceramic)
Cp=0.01µF
o
Gnd
10
I-O
0.2
0.15
0.1
5
0.05
0
0
100
200
300
400
500
0
0
100
200
300
400
500
Output Current : Io(m A)
Output Current : Io(mA)
60
NJM2880_3.0V
Control Current vs. Control Voltage
@:Ta=25
o
C
V
IN
=4.0V
Co=1.0µF
(Ceramic)
Cp=0.01µF
Io=30mA
4
NJM2880_3.0V
Output Voltage vs. Control Voltage
3.5
50
3
(µ A)
µ
Rc=0Ω
Output Voltage : Vo(V)
40
Cont
2.5
Rc=50kΩ
2
Rc=100kΩ
Control Current : I
30
Rc=0Ω
20
Rc=50kΩ
Rc=100kΩ
10
1.5
1
0.5
@:Ta=25 C
V
IN
=4.0V
Co=1.0µF
(Ceramic)
Cp=0.01µF
Io=30mA
0
0.5
1
1.5
2
Cont
o
0
0
0.5
1
1.5
2
2.5
Cont
0
3
3.5
4
2.5
3
Control Voltage : V
(V)
Control Voltage : V
(V)
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
