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, VIN = 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.

■ Compliant to USB Specifications

■ +2.7V to +5.5V Input Voltage Range

■ Two Independent Power Switches

■ Two Error Flag Outputs, Open Drain

■ 2.4V Undervoltage Lockout

■ 500mA Minimum Continuous Load Current Per Switch

■ 1.25A Short Circuit Current Limit

■ 140mΩ Maximum On-Resistance

■ 100µA On-State Supply Current

■ 1µA Shutdown Current

■ Output Can Be Forced Higher Than Input (Off-State)

■ Thermal Shutdown

■ 1ms Soft-Start Power Up

■ Active-High Version: SP2026-1

■ Active-Low Version: SP2026-2