LM3525A National Semiconductor Corporation, LM3525A Datasheet

LM3525A

Manufacturer Part Number

LM3525A

Description

LM3525 - Single Port Usb Power Switch And Over-current Protection, Package: Soic Narrow, Pin Nb=8

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM3525A.pdf (10 pages)

Current page: 1 of 10
Download datasheet (240Kb)

LM3525

Single Port USB Power Switch and Over-Current

Protection

General Description

The LM3525 provides Universal Serial Bus standard power

switch and over-current protection for all host port applica-

tions. The single port device is ideal for Notebook PC and

Handheld PC applications that supply power to one port.

A 1 ms delay on fault flag output prevents erroneous over-

current reporting caused by inrush currents during the

hot-plug events.

The LM3525 accepts an input voltage between 2.7V and

5.5V allowing use as a device-based inrush current limiter

for 3.3V USB peripherals, as well as Root and Self-Powered

Hubs at 5.5V. The Enable input accepts both 3.3V and 5.0V

logic thresholds.

The small size, low R

LM3525 a good choice for root hubs as well as ganged

power control in space-critical self-powered hubs.

Typical Operating Circuit and Connection Diagram

, and 1 ms fault flag delay make the

DS101055-31

DS101055

DS101055-1

Features

n 1 ms Fault Flag Delay During Hot-Plug Events

n Smooth Turn-On Eliminates Inrush Induced Voltage

n UL Recognized Component: REF # 205202

n 1A Nominal Short Circuit Output Current Protects

n Thermal Shutdown Protects Device in Direct Short

n 500mA Minimum Continuous Load Current

n Small SO-8 Package Minimizes Board Space

n 2.7V to 5.5V Input Voltage Range

n Switch Resistance

n 1µA Max Standby Current

n 100 µA Max Operating Current

n Undervoltage Lockout (UVLO)

Applications

n Universal Serial Bus (USB) Root Hubs including

n USB Monitor Hubs

n Other Self-Powered USB Hub Devices

n High Power USB Devices Requiring Inrush Limiting

n General Purpose High Side Switch Applications

Drop

Notebook PC Power Supplies

Condition

Desktop and Notebook PC

LM3525M-H

LM3525M-L

120 m

DS101055-30

DS101055-2

Max. at V

= 5V

February 2000

www.national.com

Related parts for LM3525A

Related keywords

LM3525A datasheet
LM3525A data sheet
LM3525A pdf datasheet
LM3525A component
LM3525A part
LM3525A distributor
LM3525A RoHS
LM3525A datasheet download