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LM25085A - 42V Constant On-Time PFET Buck Switching Controller

General Description

The LM25085A is a functional variant of the LM25085 COT PFET Buck Switching Controller.

The functional differences of the LM25085A are: The feedback reference voltage is 0.9V, the forced off-time after current limit detection is longer, and the soft-start time is shorter (1.8 ms).

Key Features

  • 1.
  • 2 Wide 4.5V to 42V Input Voltage Range.
  • Adjustable Current Limit using RDS(ON) or a Current Sense Resistor.
  • Programmable Switching Frequency to 1MHz.
  • No Loop Compensation Required.
  • Ultra-Fast Transient Response.
  • Nearly Constant Operating Frequency with Line and Load Variations.
  • Adjustable Output Voltage from 0.9V.
  • Precision ±2% Feedback Reference.
  • Capable of 100% Duty Cycle Operation.
  • Internal Soft-Start.

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📁 Similar Datasheet

Part Number Description Manufacturer
LM25085A 42V Constant On-Time PFET Buck Switching Controller National Semiconductor

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LM25085A www.ti.com SNVS601B – JANUARY 2009 – REVISED MARCH 2013 LM25085A 42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference Check for Samples: LM25085A FEATURES 1 •2 Wide 4.5V to 42V Input Voltage Range • Adjustable Current Limit using RDS(ON) or a Current Sense Resistor • Programmable Switching Frequency to 1MHz • No Loop Compensation Required • Ultra-Fast Transient Response • Nearly Constant Operating Frequency with Line and Load Variations • Adjustable Output Voltage from 0.