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PDF NJU7780 Data sheet ( Hoja de datos )
| Número de pieza | NJU7780 | |
| Descripción | (NJU7780 / NJU7781) LOW DROPOUT VOLTAGE REGULATOR | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJU7780/81
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJU7780/81 is a low dropout voltage regulator with ON/OFF
Control.
Advanced CMOS technology achieves low quiescent current.
It is suitable for cellular phone and other portable items.
When the ON/OFF control is used, NJU7781 has high transition
response characteristics for shunt switch.
FEATURES
High Ripple Rejection
65dB typ. (f=400Hz, Vo=3V)
Low quiescent Current
Iq=20µA (Io=0mA, VCONT=VIN)
Output capacitor with 1.0µF ceramic capacitor
Output Current
Io(max)=300mA
High Precision Output
Vo±1.0%
Low Dropout Voltage
0.15V typ. (Io=150mA,Vo=3.0V)
ON/OFF Control
(Active High)
Shunt Switch
Only NJU7781
Internal Short Circuit Current Limit
Internal Thermal Overload Protection
CMOS technology
Package outline
SOT-89-5
PIN CONFIGURATION
524
123
1. CONTROL
2. GND
3. N.C.
4. VOUT
5. VIN
PACKAGE OUTLINE
NJU7780/81U1
EQUIVALENT CIRCUIT
VIN
CONTROL
Output
Control
Thermal
Protection
VOUT
VIN
CONTROL
Output
Control
Thermal
Protection
VOUT
GND
Current
Vref Limit
NJU7780
GND
Current
Vref Limit
NJU7781
Ver.2004-12-22
-1-
1 page  
ELECTRICAL CHARACTERISTICS
NJU7780/81_3.0V
Ripple Rejection vs. Output Current
100
@:Ta=25oC
90
VIN=4.0V
ein=200mVrms
Co=1.0µF(Ceramic)
80
70
f=1kHz
60
50
40
30
20
0.001
f=10kHz
0.01 0.1 1 10
Output Current : Io(mA)
100
0.3
0.25
0.2
0.15
0.1
0.05
0
-50
NJU7780/81_3.0V
Dropout Voltage v.s. Temperature
@:Io=150mA
Co=1.0µF(Ceramic)
Cin=0.1µF
0 50 100
Temperature : Ta (oC)
150
30
25
20
15
10
5
0
-50
NJU7780/81_3.0V
Quiescent Current v.s. Temperature
@:VIN=4.0V
Output is open.
Co=1.0µF(Ceramic)
Cin=0.1µF
0 50 100
Temperature : Ta (oC)
150
Ver.2004-12-22
NJU7780/81
NJU7780/81_3.0V
Equivalent Serise Resistance vs. Output Current
100
@:Ta=25oC
VIN=4.0V
Co =1µF(Ceramic)
Cin=0.1 µF
10
1
STABLE REGION
0.1
0.02
1µ
10µ 100µ 1m 10m 100m 700m
Output Current : Io(A)
NJU7780/81_3.0V
Control Voltage v.s. Temperature
2
1.5
1
0.5
@:VIN=4.0V
Io=30mA
Co=1.0µF(Ceramic)
C in=0.1 µF
0
-50 0 50 100
Temperature : Ta (oC)
150
NJU7780/81_3.0V
Output Voltage v.s. Temperature
4
@:VIN=4.0V
Io=30mA
3.5 Co=1.0µF(Ceramic)
Cin=0.1µF
3
2.5
2
1.5
1
0.5
0
-50 0 50 100 150
Temperature Ta (oC)
200
-5-
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet NJU7780.PDF ] | |
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