參數(shù)資料
型號: SI4779CY
廠商: Vishay Intertechnology,Inc.
英文描述: High-Side N-Channel Switch with Current Limit
中文描述: 高側(cè)N溝道和電流限制開關(guān)
文件頁數(shù): 1/8頁
文件大小: 86K
代理商: SI4779CY
Si4779CY
Vishay Siliconix
New Product
Document Number: 71664
S-04276—Rev. A, 16-Jul-01
www.vishay.com
1
High-Side N-Channel Switch with Current Limit
FEATURES
APPLICATIONS
User Set Over Current Limit From 400 mA to 2.4 A
Low r
DS(on)
45 m (max) at 25 C
Fault Indicator
Under Voltage Lockout
Notebook Computers Power Management
USB Power Distribution
Hot Plug In Power Supplies
Power Supply/Load Protection
Battery-Charger Circuits
DESCRIPTION
The Si4779CY n-channel high-side switch combines a low
r
DS(on)
MOSFET switch with a user set, pulse gate control
(PGC) based current limit. This switch is designed to protect
the system power supply from overloads and short circuit
conditions in applications such as USB. The PGC based
approach to the current limiter provides the additional benefit
of keeping the MOSFET junction temperature within
specification, thereby eliminating the need for thermal
shutdown. The low quiescent current makes the Si4779CY
ideal for use in battery powered devices. The Si4779CY
operates on both 3-V and 5-V busses, and is packaged in the
LITTLE FOOT SO-8 package.
FUNCTIONAL BLOCK DIAGRAM
+
Control
Circuit
IN
FAULT
ON
GND
OUT
SET
V
R
See page 7 for a detailed block diagram.
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