APL3546A Datasheet, PDF (1/17 Pages) Anpec Electronics Coropration – Power -Distribution Switches with Soft Start

APL3546A
Power -Distribution Switches with Soft Start
Features
General Description
• 78mΩ High Side MOSFET
• Soft Start Time Programmable by External
Capacitor
• Wide Supply Voltage Range: 4.5V to 24V
• Current Limit Protections
• Under Voltage Lockout Protection
• Over-temperature Protection
• Logic Level Enable Input
• Lead Free and Green Devices Available (RoHS
Compliant)
• Current Limit setting
Applications
• TFT LCD Modules
• Notebook and Desktop Computers
• USB Ports
• High-side Power Protection Switches
The APL3546A is a power-distribution switch with some
protection functions. The device incorporates a 78mΩ N-
channel MOSFET power switch that is controlled by an
enable logic pin and has a SS pin dedicated to soft start
ramp-up rate control that can be used in application where
the inrush current is concerned.
The device integrates some protection features, includ-
ing current limit protection, over-temperature protection,
UVLO and current limit setting. The current limit protec-
tion can protect down-stream devices from catastrophic
failure by limiting the output current at current limit thresh-
old during over-load or short circuit events. The over-tem-
perature protection function shuts down IC when the junc-
tion temperature rises beyond 150^oC. The UVLO function
keeps the power switch in off state until there is a valid
input voltage present. The current limit can be set by con-
necting resistor from the current limit adjustable pin ISET
to ground.
Simplified Application Circuit
APL 3546A
VIN VOUT
SS ISET
EN
GND
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
1
Rev. A.3 - Jul., 2013
www.anpec.com.tw