The IMP2524 and IMP2527 are complete power management solutions for bus-powered and self-powered USB hubs. Each device contains four independent power switches and fault detection logic. The IMP2524 channel resistance is a low 140m? maximum and the IMP2527 channel resistance is 300? maximum. Both device operate with voltage inputs from 2.7V to 5.5V.

Key Features

◆ USB Rev. 1.1 and 2.0 Compliant

◆ Four independent switches

◆ 2.7V to 5.5V input operation

◆ Low MOSFET ON resistance

– IMP2524: 0.1?, 0.14? maximum

– IMP2527: 0.2?, 0.3? maximum

◆ 500mA continuos load current per switch

◆ Low supply current

– 110μA ON-state current, 0.75μA OFF-state

current

◆ 1.25A maximum current limit, 750mA typical

◆ Thermal shutdown 2.4V undervoltage lockout

(UVLO)

◆ Open-drain flag output

– Undervoltage

– Current limit

– Thermal shutdown

◆ Output can be force higher than input

◆ Active HIGH(-1) and active LOW(-2) enable

◆ 16-pin SO and DIP packages, Die available

◆ Pin compatible with the Micrel MIC2524 and

MIC2527

Applications

◆ USB host and self-powered hubs

◆ USB video monitors

◆ USB printers