1

Date: 5/3/06 Rev I

SP2525A USB High-Side Power Switch

© Copyright 2006 Sipex Corporation

FEATURES

■ +3.0V to +5.5V Input Voltage Range

■ 500mA Continuous Load Current per

Channel

■ 2.6V Undervoltage Lockout

■ 1.25A Short Circuit Current Limit

■ 100mΩ Maximum On-Resistance

■ 75µA On-State Supply Current

■ 1µA Shutdown Current

■ Output can be Forced Higher than Input

(Off-State)

■ Thermal Shutdown

■ Slow Turn On and Fast Turn Off

SP2525A

DESCRIPTION

The SP2525A device is an integrated high-side power switch ideal for self-powered and bus-

powered Universal Serial Bus (USB) applications. The high-side switches are MOSFETs with

length. Multi-purpose open-drain fault flag output indicates over-current limiting, thermal

shutdown, or undervoltage lockout. Output current is typically limited to 0.85A below the 5A

safety requirement, and the thermal shutdown function shuts the switch off to prevent damage

under overcurrent conditions. Guaranteed minimum output rise time limits inrush current

during hot plug-in, minimizing EMI and preventing the voltage at the upstream port from

dropping excessively.

USB High-Side Power Switch

APPLICATIONS

■ USB Power Management

■ Hot Plug-In Power Supplies

■ Battery Charger Circuit

Now Available in Lead Free Packaging

■ Active-High Version: SP2525A-1

■ Active-Low Version: SP2525A-2

TYPICAL APPLICATION CIRCUIT

One Port Self Powered Hub

DATA

GND

D-

D+

VBUS

IN

OUT

GND

10µF

Cout

10K

+ 1µF

Cin

VIN

ON/OFF

OVERCURRENT

GND

SP2525A

EN

FLG

GND

NC

OUT

IN

OUT

IN

33µF

Ferrite Bead

Ferrite Bead

0.01 µF

DATA

VBUS

D+

D-

GND

VCC

5.0V

0.01 µF

SPX1521

®

®

USB CONTROLLER

+

+

33µF

4.50V TO 5.25V

UPSTREAM VBUS

100mA MAX

33µF, 16V Tantalum, or

100µF, 10V Electrolytic

Bold line indicate high-current traces

1

2

3

4

5

6

7

8

SP2525A

8 Pin NSOIC

OUT

IN

OUT

GND

EN

FLG

NC

IN