SP2026

PRELIMINARY I N F O R M A T I O N ® SP2026 +2.7V to +5.5V USB Power Control Switch 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 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 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. ENA FLGA FLGB ENB 1 2 3 4 ® 8 7 OUTA IN GND OUTB SP2026 6 5 Rev. 1/23/02 SP2026 +2.7V to +5.5V USB Power Contro...