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PDF A4771 Data sheet ( Hoja de datos )
| Número de pieza | A4771 | |
| Descripción | 1A CURRENT LIMITED LOAD SWITCH | |
| Fabricantes | AiT Semiconductor | |
| Logotipo |  |
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AiT Semiconductor Inc.
www.ait-ic.com
A4771
POWER SWITCH
1A CURRENT LIMITED LOAD SWITCH
DESCRIPTION
FEATURES
The A4771 Smart Switch is a current limited
P-channel MOSFET power switch designed for
high-side load switching applications. This switch
operates with inputs ranging from 2.4V to 5.5V,
making it ideal for both 3V and 5V systems. An
integrated current-limiting circuit protects the input
supply against large currents which may cause the
supply to fall out of regulation. The A4771 is also
protected from thermal overload which limits power
dissipation and junction temperatures. It can be used
to control loads that require up to 1A. Current limit
threshold is programmed with a resistor from SET to
ground. The quiescent supply current is typically a low
9μA. In shutdown mode, the supply current decreases
to less than 1μA.
Input Voltage Range: 2.4V to 5.5V
Programmable Over-Current Threshold
Fast Transient Response:
400ns Response to Short Circuit
Low Quiescent Current
9μA Typical
1μA Max with Switch Off
200mΩ Typical RDS(ON)
Only 2.5V Needed for ON/OFF Control
Under-Voltage Lockout
Thermal Shutdown
4kV ESD Rating
Temperature Range: -40°C to +85°C
Available in SOT-25 Package
APPLICATION
The A4771 is available in SOT-25 package.
ORDERING INFORMATION
Hot Swap Supplies
Notebook Computers
Peripheral Ports
Personal Communication Devices
Package Type
Part Number
SOT-25
A4771E5R-X
E5
A4771E5VR-X
X: H: High Level Active
Note
L: Low Level Active
V: Halogen free Package
R: Tape & Reel
AiT provides all RoHS products
Suffix “ V “ means Halogen free Package
TYPICAL APPLICATION
REV1.1
- APR 2009 RELEASED, SEP 2013 UPDATED -
-1-
1 page  
AiT Semiconductor Inc.
www.ait-ic.com
A4771
POWER SWITCH
1A CURRENT LIMITED LOAD SWITCH
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 5V, TA= 25°C, unless otherwise noted
1. Quiescent Current vs. Temperature
2. Quiescent Current vs. VIN
3. Off-Supply Current vs. Temperature
4. Off-Switch Current vs. Temperature
5. Turn-On vs. Temperature
RLOAD=10Ω, CLOAD=0.47μF
6. Turn-Off vs. Temperature
RLOAD=10Ω, CLOAD=0.47μF
REV1.1
- APR 2009 RELEASED, SEP 2013 UPDATED -
-5-
5 Page 
AiT Semiconductor Inc.
www.ait-ic.com
PACKAGE INFORMATION
Dimension in SOT-25 (Unit: mm)
A4771
POWER SWITCH
1A CURRENT LIMITED LOAD SWITCH
Symbol
A
A1
A2
b
c
D
E
E1
e
e1
L
θ
Min Max
1.050
1.250
0.000
0.100
1.050
1.150
0.300
0.500
0.100
0.200
2.820
3.020
1.500
1.700
2.650
2.950
0.950(BSC)
1.800
2.000
0.300
0.600
0° 8°
REV1.1
- APR 2009 RELEASED, SEP 2013 UPDATED -
- 11 -
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet A4771.PDF ] | |
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