Copyright

© ANPEC Electronics Corp.

Rev. A.1 - Aug., 2012

APL3521

www.anpec.com.tw

1

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.

Power-Distribution Switches

•

90m

Ω High Side MOSFET

•

2A Continuous Current

•

Built-in Soft-Start Control

•

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

APL3521A: Active High

APL3521B: Active Low

•

Lead Free and Green Devices Available

(RoHS Compliant)

Features

General Description

Applications

•

TFT LCD Modules

•

Notebook and Desktop Computers

•

USB Ports

•

High-Side Power Protection Switches

Pin Configuration

Simplified Application Circuit

The APL3521A/B is a power-distribution switch with some

protection functions that can deliver current up to 2A. The

device incorporates a 90m

Ω N-channel MOSFET power

switch that is controlled by an enable logic.

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

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

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 packages

with enable active-high(EN) and active-low(ENB) versions.

GND 2

5 VIN

ENB 3

4 NC

VOUT 1

SOT-23-5

APL3521B

GND 2

5 VIN

EN 3

4 NC

VOUT 1

SOT-23-5

APL3521A

VIN

VOUT

GND

APL3521A/B

EN/ ENB

EN

Control