US3277 Datasheet Power Distribution Switch

Manufacturer: Unisonic Technologies

Overview: UNISONIC TECHNOLOGIES CO., LTD US3X77 POWER DISTRIBUTION SWITCH.

This datasheet includes multiple variants, all published together in a single manufacturer document.

Datasheet Details

Part number	US3277
Manufacturer	Unisonic Technologies
File Size	636.94 KB
Description	POWER DISTRIBUTION SWITCH
Datasheet	US3277 US3177 Datasheet (PDF)

General Description

The UTC US3X77 is a power distribution switch and particularly designed for self-powered and bus-powered Universal Serial Bus (USB) applications.

The UTC US3X77 incorporates protection circuits including current limiting circuit with foldback function, thermal shutdown circuit designed to prevent catastrophic switch failure due to increasing power dissipation when continuous heavy loads or short circuit occurs.

Besides, a built-in charge pump is used to drive the N-channel MOSFET that is free of parasitic body diode to eliminate any reversed current flow across the switch when it is powered off.

Key Features

100mΩ High-Side MOSFET.
Supply Current: Switch on : 65μA(Typ) Switch off : 1μA (Max).
Accurate Current Limit with Foldback.
Deglitched Open-Drain Over-Current Flag Output (OC).
No Reverse Current when Power Off.
Under voltage Lockout.
Operating Range:2.7V ~ 5.5V.
Output Shutdown Pull-low Resistor.

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