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MAX5973 - Phase Redundancy Power Supervisor

Description

The MAX5973 protects individual slave phases of a phase redundant DC-DC converter.

The power protection functions comprise an electronic circuit-breaker controller driving an external n-channel MOSFET at the step-down power input, and an internal 3.3V switch for the slave phase-controller power.

Features

  • S 9V to 14V Operating Range S Electronic Circuit-Breaker Controller Drives External n-Channel MOSFET S Internal, 350mA MOSFET for 3.3V Power S Open-Drain Ideal Diode Controller Drives External n-Channel MOSFET S Serial Data Bus Loop/Bypass Function S Serial Data Clock Buffer S Dual Analog Error-Signal Buffer Amplifiers S Active-Low.

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Full PDF Text Transcription

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www.DataSheet4U.com 19-5243; Rev 0; 4/10 Phase Redundancy Power Supervisor MAX5973 General Description The MAX5973 protects individual slave phases of a phase redundant DC-DC converter. The power protection functions comprise an electronic circuit-breaker controller driving an external n-channel MOSFET at the step-down power input, and an internal 3.3V switch for the slave phase-controller power. To protect the output bus, an “ideal diode” controller drives an external n-channel MOSFET at the slave phase output. Serial data to and from the slave phase is buffered by the MAX5973 to prevent a failure of one phase from interrupting communication to the remaining phases. Similarly, the differential analog error signals for the phase controller are also buffered.
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