SC5826 Datasheet, PDF (1/8 Pages) Semtech Corporation – HotSwitch™ USB Power Distribution Switch

HotSwitch™
USB Power Distribution Switch
SC5826
PRELIMINARY - February 18, 2000
TEL:[phone] FAX:[phone] WEB:http://www.semtech.com
DESCRIPTION
FEATURES
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.
• Designed to meet USB specification 1.1 power
management requirements
• 500mA continuous load current
• High-side MOSFET switch with low R _DS(ON)
• Short-circuit current protection
• Internal thermal shutdown
• Undervoltage lockout
• Logic overcurrent output
• Soft start circuit with slow turn-on time
APPLICATIONS
• Universal Serial Bus (USB) power management
• Self-powered or bus-powered USB hubs
• Root hubs in desktop PCs & servers
• Notebook PCs
• Peripherals
ORDERING INFORMATION
DEVICE⁽¹⁾
ENABLE
SC5826-1CS
Active High
SC5826-2CS
Active Low
Note:
(1) Add suffix ‘TR’ for tape and reel.
PACKAGE
SO-8
SO-8
PIN CONFIGURATION
BLOCK DIAGRAM
Top View
(8-Pin SOIC)
© 2000 SEMTECH CORP.
1
652 MITCHELL ROAD NEWBURY PARK CA 91320