APL3514 Datasheet, PDF (1/21 Pages) Anpec Electronics Coropration – Power-Distribution Switches with Soft Start

APL3512
Power-Distribution Switches with Soft Start
Features
General Description
• 90mΩ High Side MOSFET
• 2A Continuous Current
• Soft-Start Time Programmable by External
Capacitor
• Wide Supply Voltage Range: 2.7V to 5.5V
• Current-Limit and Short-Circuit Protections
• Under-Voltage Lockout Protection
• Reverse Current Blocking when Switch Disabled
• Over-Temperature Protection
• Logic Level Enable Input
APL3512A: Active High
APL3512B: Active Low
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• TFT LCD Modules
• Notebook and Desktop Computers
• USB Ports
• High-Side Power Protection Switches
The APL3512A/B is a power-distribution switch with some
protection functions that can deliver current up to 2A. The
device incorporates a 90mΩ 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, short-circuit protection, over-
temperature protection, and UVLO. The current-limit and
short-circuit protection can protect down-stream devices
from catastrophic failure by limiting the output current at
current-limit threshold during over-load or short-circuit
events. When V_OUT drops below V_IN-1.5V the devices limit
the current to a lower and safe level. The over-tempera-
ture protection function shuts down the N-channel
MOSFET power switch when the junction temperature
rises beyond 140^oC and will automatically turns on the
power switch when the temperature drops by 20^oC. The
UVLO function keeps the power switch in off state until
there is a valid input voltage present.
The device is available in lead free SOT-23-5, TDFN2x2-
6 and SOP-8 packages with enable active-high(EN) and
active-low(ENB) versions.
Simplified Application Circuit
APL3512A/B
V_IN
VIN VOUT
V_OUT
EN
Control
SS
EN/ ENB
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.6 - Aug., 2012
www.anpec.com.tw