SP2026 Datasheet, PDF (1/14 Pages) Sipex Corporation – +2.7V to +5.5V USB Power Control Switch

®
SP2026
+2.7V to +5.5V USB Power Control Switch
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 140mΩ Maximum On-Resistance
s 100µA On-State Supply Current
s 1µA 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
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
output switches until a valid input voltage, V_IN = 2.4V, is present. Once a valid input voltage
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, 100mΩ, and
supplies a 500mA minimum output current per switch. In overcurrent and thermal shutdown,
error flags may be asserted for overtemperature.
Rev. 1/23/02
ENA 1
FLGA 2
FLGB 3
ENB 4
®
SP2026
8 OUTA
7 IN
6 _GND
5 OUTB
SP2026 +2.7V to +5.5V USB Power Control Switch
1
© Copyright 2002 Sipex Corporation