1

Rev. 1/23/02

SP2026 +2.7V to +5.5V USB Power Control Switch

© Copyright 2002 Sipex Corporation

s Compliant to USB Specifications

s +2.7V to +5.5V Input Voltage Range

s Two Independent Power Switches

s Two Error Flag Outputs, Open Drain

s 2.4V Undervoltage Lockout

s 500mA Minimum Continuous Load

Current Per Switch

s 1.25A Short Circuit Current Limit

s 140m

Ω Maximum On-Resistance

SP2026

DESCRIPTION

The SP2026 is a dual +2.7V to +5.5V supervisory power control switch that is current limited

to 1.25A and has thermal shutdown to protect itself and the load. A device is disabled in

thermal shutdown until the excessive current load is removed, the appropriate enable pins are

toggled, or the die temperature cools to 120

°C. The undervoltage lockout feature disables the

is present and the SP2026 is enabled, a 1ms soft start prevents momentary voltage drops

caused by charging a capacitive load. The SP2026 has a low on resistance, 100m

Ω, and

supplies a 500mA minimum output current per switch. In overcurrent and thermal shutdown,

error flags may be asserted for overtemperature.

+2.7V to +5.5V USB Power Control Switch

®

s 100

µA On-State Supply Current

s 1

µA Shutdown Current

s Output Can Be Forced Higher Than

Input (Off-State)

s Thermal Shutdown

s 1ms Soft-Start Power Up

s Active-High Version: SP2026-1

s Active-Low Version: SP2026-2

ENA

GND

OUTA

FLGA

FLGB

OUTB

IN

ENB

8

7

4

3

2

1

5

6

SP2026

®

®