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US3177 - POWER DISTRIBUTION SWITCH

General Description

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

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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Full PDF Text Transcription for US3177 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for US3177. For precise diagrams, and layout, please refer to the original PDF.

UNISONIC TECHNOLOGIES CO., LTD US3X77 POWER DISTRIBUTION SWITCH  DESCRIPTION The UTC US3X77 is a power distribution switch and particularly designed for self-powered and...

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wer 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. The RDS(ON) of the MOSFET switch is as low as 100

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