NJRC NJM2880U26 Low dropout voltage regulator Datasheet

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.
■ FEATURES
●High Ripple Rejection
70dB typ. (f=1kHz)
●Output Noise Voltage
Vno=30uVrms (Cp=0.01uF)
●Output capacitor with 1.0uF 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(5pin)
■ PACKAGE OUTLINE
NJM2880U
■ PIN CONFIGURATION
NJM2880U
PIN FUNCTION
1.CONTROL (Active High)
2.GND
3.NOISE BYPASS
4.VOUT
5.VIN
■ EQUIVALENT CIRCUIT
VOUT
VIN
Cont
Thermal
Protection
Noise
Bypass
Bandgap
Reference
GND
■ OUTPUT VOLTAGE RANK LIST
Device Name
Vout
Device Name
NJM2880U21
2.1V
NJM2880U33
NJM2880U25
2.5V
NJM2880U38
NJM2880U26
2.6V
NJM2880U05
NJM2880U27
NJM2880U28
NJM2880U285
NJM2880U03
2.7V
2.8V
2.85V
3.0V
Vout
3.3V
3.8V
5.0V
NJM2880
■ ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
VIN
Control Voltage
VCONT
Power Dissipation
PD
Operating Temperature
Topr
Storage Temperature
Tstg
(Ta=25°C)
RATINGS
UNIT
+14
V
+14(note 1)
V
350
mW
-40 ∼ +85
°C
-40 ∼ +125
°C
(note 1) When input voltage is less than +14V, the absolute maximum
control voltage is equal to the input voltage.
■ ELECTRICAL CHARACTERISTICS
(VIN=Vo+1V, Co=1.0uF: Vo≥2.7V (Co=2.2uF: Vo≤2.6V), Cp=0.01uF, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX.
Output Voltage
Vo
Io=30mA
-1.0%
+1.0%
Io=0mA, expect Icont
Quiescent Current
120
180
IQ
Quiescent Current
VCONT=0V
100
IQ(OFF)
at Control OFF
Vo-0.3V
Output Current
Io
300
400
Line Regulation
0.10
∆Vo/∆VIN
VIN=Vo+1V ∼ Vo+6V, Io=30mA
Load Regulation
0.03
∆Vo/∆Io
Io=0 ∼ 300mA
Dropout Voltage
Io=100mA
0.10
0.18
∆VI-O
ein=200mVrms,f=1kHz, Io=10mA
Ripple Rejection
RR
70
Vo=3V Version
Average Temperature
Coefficient of Output
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
±50
Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
VNO
30
Vo=3V Version
Control Voltage for
1.6
VCONT(ON)
ON-state
Control Voltage for
VCONT(OFF)
0.6
OFF-state
(note 2) 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
A
IIN
VIN
VIN
VOUT
1.0uF
OR
2.2uF(Vo<2.6V)
(Ceramic
Capacitor)
0.1uF
A
V
ICONT
CONTROL
NOISE
BYPASS
Cp=0.01uF
GND
VCONT
IOUT
V
VOUT
UNIT
V
uA
nA
mA
%/V
%/mA
V
dB
ppm/°C
uVrms
V
V
NJM2880
■ TYPICAL APPLICATION
① In the case where ON/OFF Control is not required:
VIN
VIN
VOUT
VOUT
1.0uF
OR
2.2uF(Vo<2.6V)
(Ceramic
Capacitor)
0.1uF
R
(0~300kΩ )
CONTROL
NOISE
BYPASS
Cp=0.01uF
GND
Connect control terminal to VIN terminal
The quiescent current can be reduced by using a resistance “R”. Instead, it increases the minimum
operating voltage. For further information, please refer to Figure “Output Voltage vs. Control Voltage”.
② In use of ON/OFF CONTROL:
VIN
VIN
VOUT
VOUT
1.0uF
OR
2.2uF(Vo<2.6V)
(Ceramic
Capacitor)
0.1uF
R
CONTROL
NOISE
BYPASS
Cp=0.01uF
GND
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 0.01uF greater to avoid the problem.
NJM2880
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
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