NJM2887 PDF даташит
Спецификация NJM2887 изготовлена «New Japan Radio» и имеет функцию, называемую «ADJUSTABLE LOW DROPOUT VOLTAGE REGULATOR». |
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Детали детали
Номер произв | NJM2887 |
Описание | ADJUSTABLE LOW DROPOUT VOLTAGE REGULATOR |
Производители | New Japan Radio |
логотип |
5 Pages
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NJM2887
ADJUSTABLE LOW DROPOUT VOLTAGE REGULATOR
! GENERAL DESCRIPTION
The NJM2887 is an adjustable low dropout voltage
regulator with ON/OFF control.
Advanced Bipolar technology achieves low noise, high
ripple rejection and low quiescent current.
It is suitable for DVD, FAX and Car Audio.
! PACKAGE OUTLINE
NJM2887DL2
! FEATURES
" High Ripple Rejection
75dB typ. (f=1kHz)
" Output Noise Voltage
Vno=45µVrms
" Output capacitor with 2.2µF ceramic capacitor
" Output Current
Io(max.)=500mA
" High Precision Output
Vref=1.27V±1.0%
" Low Dropout Voltage
0.18V typ. (Io=300mA)
" ON/OFF Contorol
" Internal Short Circuit Current Limit
" Internal Thermal Overload Protection
" Bipolar Technology
" Package Outline
TO-252-5
! PIN CONFIGURATION
3
12345
PIN FUNCTION
1.CONTROL
2. VIN
3.GND
4.VOUT
5.VADJ
NJM2887DL2
! EQUIVALENT CIRCUIT
VIN
Control
Bandgap
Reference
Thermal
Protection
VOUT
VADJ
GND
Ver.2004-01-16
-1-
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NJM2887
! ABSOLUTE MAXIMUM RATINGS
(Ta=25°C)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
Control Voltage
VIN
VCONT
+14
+14(*note 1)
V
V
Power Dissipation
Operating Temperature
Storage Temperature
PD
8(Tc=25°C)
0.8(Ta≤25°C)
mW
Topr
-40 ∼ +85
°C
Tstg
-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, R1=100kΩ, CIN=0.33uF, Co=2.2uF:Vo (Co=4.7µF: Vo≤2.6V), Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
Output Voltage
Vo Io=30mA
-1.0%
Reference Voltage Vref Io=30mA
1.257
Quiescent Current
Quiescent Current
at Control OFF
IQ
IQ(OFF)
Io=0mA
VCONT=0V
−
−
Output Current
Line Regulation
Load Regulation
Dropout Voltage(*note 2)
Ripple Rejection
Io
∆Vo/∆VIN
∆Vo/∆Io
∆VI−O
RR
Vo−0.3V
VIN=Vo+1V ∼ Vo+6.0V, Io=30mA
Io=0 ∼ 500mA
Io=300mA
ein=200mVrms,f=1kHz, Io=10mA
Vo=3.0V Version
500
−
−
−
−
Average Temperature
Coefficient of Output
Voltage
∆Vo/∆Ta Ta=0∼85°C, Io=10mA
−
Output Noise Voltage
VNO
f=10Hz∼80kHz, Io=10mA,
Vo=3.0V Version
−
Control Voltage for
ON-state
VCONT(ON)
1.6
Control Voltage for
OFF-state
VCONT(OFF)
−
(*note 2): Except output voltage less than 2.1V.
TYP.
−
1.27
200
−
650
−
−
0.18
75
±50
45
−
−
MAX.
+1.0%
1.283
300
UNIT
V
V
uA
100 nA
− mA
0.10 %/V
0.03 %/mA
0.28 V
− dB
− ppm/°C
− µVrms
−V
0.6 V
-2-
Ver.2004-01-16
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NJM2887
! POWER DISSIPATION VS. AMBIENT TEMPERATURE
NJU2887DL2
(Topr=-40~+85°C,Tj=125°C,PD=8W (TC=25°C),PD=0.8W (Ta≤25°C))
10
∞ Heat Sink
8
6 θHS=5°C/W
θHS=10°C/W
4 θHS=20°C/W
2
Without Heat Sink
0
-50 -25
0
25 50
Ambient Temperature Ta(°C)
75
100
! TEST CIRCUIT
A IIN
VIN
VO
VIN
0.33µF
NJM2887
A ICONT CONTROL
VADJ
V VCONT
GND
A IQ
IOUT V VO
R1 2.2µF
OR
4.7µF(Vo≤2.6V)
R2
100kΩ
Ver.2004-01-16
-3-
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