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LM25019 Datasheet 100-ma Constant On-time Synchronous Regulator

Manufacturer: Texas Instruments

Overview: LM25019 SNVS952F – DECEMBER 2012 – REVISED MAY 2021 LM25019 48-V, 100-mA Constant On-Time Synchronous Buck / Fly-Buck™ Regulator.

General Description

The LM25019 is a 48-V, 100-mA synchronous stepdown regulator with integrated high-side and lowside MOSFETs.

The constant on-time (COT) control scheme employed in the LM25019 requires no loop compensation, provides excellent transient response, and enables very high step-down ratios.

The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range.

Key Features

  • Wide 7.5-V to 48-V input range.
  • Integrated 100-mA high-side and low-side switches.
  • No schottky required.
  • Constant on-time control.
  • No loop compensation required.
  • Ultra-fast transient response.
  • Nearly constant operating frequency.
  • Intelligent peak current limit.
  • Adjustable output voltage from 1.225 V.
  • Precision 2% feedback reference.
  • Frequency adjustable to 1 MHz.
  • Adjustable undervoltage l.

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