DESCRIPTION

The μPD16874 is a power switch IC with an overcurrent limiter that is used for the power bus of a Universal Serial Bus (USB). This product has Pch power MOSFET circuits, each of which has a low-on resistance (100 m? TYP.), in its switching block.

In addition, the IC is also equipped with an overcurrent detector that is essential for a host/hub controller conforming to the USB Standard, so that the IC can report an overcurrent to the controller. Moreover, a thermal shutdown circuit and an undervoltage lockout circuit are also provided as the protection circuits of the IC.

This product has four channels of power switches, control input pins, and flag output pins to simultaneously control four USB ports with a single IC.

FEATURES

? Four P-ch power MOSFET circuits

? Overcurrent detector that outputs active-low control signal from detection report pin

? Overcurrent limiter to prevent system voltage drop

? Thermal shutdown circuit

? Undervoltage lockout circuit

? Each of four circuits can be turned on and off independently of the others by a control pin. (CTL input: active low)

? 16-pin SOP package