SC5826

© 2000 SEMTECH CORP.

HotSwitch™

USB Power Distribution Switch

PRELIMINARY - February 18, 2000

652 MITCHELL ROAD NEWBURY PARK CA 91320

1

ORDERING INFORMATION

DESCRIPTION

USB power distribution switches are high-side n-

channel MOSFET switches with built-in overcurrent

protection and low on-state resistance. The SC5826

switch is designed to meet the USB requirements for

power switching and maintenance-free fault protection

for self-powered & bus-powered hub applications. The

SC5826 features low on-state resistance to meet the

USB requirement for voltage drop and regulation. The

switch is controlled by an enable input that is

compatible with 3V and 5V logic. The enable input is

available with an active high or active low input for

maximum design flexibility. The device provides short

circuit current limiting at a value of less than 1.6A, well

below the USB limit of 5A. During an overcurrent

condition the device provides a fault notification to

signal the USB controller. An integrated thermal

protection circuit automatically shuts the switch off

when the junction temperature reaches its thermal

limit. The switch remains off until the junction

temperature drops approximately 10°C. The switch will

continue to cycle on and off until the fault is removed.

Inrush current limiting prevents the voltage drop on an

upstream port when the switch is enabled. An

undervoltage lockout circuit guarantees the switch is

initially off during start-up.

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

Note:

(1) Add suffix ‘TR’ for tape and reel.

DEVICE

(1)

ENABLE

PACKAGE

SC5826-1CS

Active High

SO-8

SC5826-2CS

Active Low

SO-8

FEATURES

management requirements

DS(ON)

APPLICATIONS

BLOCK DIAGRAM

PIN CONFIGURATION

Top View

(8-Pin SOIC)