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PDF A4772 Data sheet ( Hoja de datos )
| Número de pieza | A4772 | |
| Descripción | POWER SWITCHES | |
| Fabricantes | AiT Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de A4772 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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AiT Semiconductor Inc.
www.ait-ic.com
A4772
POWER SWITCHES WITH FLAG
80mΩ, 0.5A/0.8A/1A/1.5A HIGH-SIDE
DESCRIPTION
The A4772 is a low voltage, single N-MOSFET
high-side power switch, optimized for self-powered
and bus-powered Universal Serial Bus (USB)
applications. The A4772 equipped with a charge
pump circuitry to drive the internal MOSFET switch;
the switch's low RDS(ON), 80mΩ, meets USB voltage
drop requirements and a flag output is available to
indicate fault conditions to the local USB controller.
Additional features include soft-start to limit inrush
current during plug-in, thermal shutdown to prevent
catastrophic switch failure from high-current loads,
under-voltage lockout (UVLO) to ensure that the
device remains off unless there is a valid input
voltage present. The maximum current is limited to
typically 2.1A/1.5A/1A/0.65A through the switch of
A4772A/B/C/D, lower quiescent current as 25uA
making this device ideal for portable battery-operated
equipment.
The A4772 is available in SOT-25 package.
ORDERING INFORMATION
Package Type
Part Number
SOT-25
Note
E5
A4772ZE5R-X
A4772ZE5VR-X
X: Pin Type
Z: Current
V: Halogen free Package
R: Tape & Reel
AiT provides all RoHS products
Suffix “ V “ means Halogen free Package
FEATURES
Wide Input Voltage Ranges : 2.5V to 5.5V
Compliant to USB Specifications
Typical RDS(ON) : 80mΩ
1.7V Typical Under-Voltage Lockout (UVLO)
Output Can Be Forced Higher Than Input
(Off-State)
Low Supply Current :
25uA Typical at Switch on State
1uA Typical at Switch off State
Guaranteed 1.5A/1A/0.8A/0.5A for
A4772A/B/C/D Continuous Load Current
Open-Drain Fault Flag Output
Hot Plug-In Application (Soft-Start)
Current Limiting Protection
Thermal Shutdown Protection
Reverse Current Flow Blocking (no body diode)
Available in SOT-25 Package
APPLICATION
USB Bus/Self Powered Hubs
USB Peripherals
ACPI Power Distribution
PC Card Hot Swap
Notebook, Motherboard PCs
Battery-Powered Equipment
Hot-Plug Power Supplies
Battery-Charger Circuits
TYPICAL APPLICATION
REV1.1 - OCT 2012 RELEASED ; JUN 2013 UPDATED -
Basic Application Circuit with A4772
-1-
1 page  
AiT Semiconductor Inc.
www.ait-ic.com
A4772
POWER SWITCHES WITH FLAG
80mΩ, 0.5A/0.8A/1A/1.5A HIGH-SIDE
TYPICAL PERFORMANCE CHARACTERISTICS
1. RDSON vs. VIN
2. IQ vs. VIN
3. Ilimit vs. VIN
4. VOUT vs. IOUT
5. Short Circuit Fold-Back Current
CH1:VO, CH4:IO
6. Flag Delay Time
CH1: FLAG , CH2:VO, CH4:IO
REV1.1 - OCT 2012 RELEASED ; JUN 2013 UPDATED -
-5-
5 Page 
AiT Semiconductor Inc.
www.ait-ic.com
PACKAGE INFORMATION
Dimension in SOT-25 (Unit: mm)
A4772
POWER SWITCHES WITH FLAG
80mΩ, 0.5A/0.8A/1A/1.5A HIGH-SIDE
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 - OCT 2012 RELEASED ; JUN 2013 UPDATED -
- 11 -
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet A4772.PDF ] | |
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