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LM5149 - DC/DC Controller

General Description

The LM5149 is a 80-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications.

The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation.

Key Features

  • Functional Safety-Capable.
  • Documentation available to aid functional safety system design.
  • Two integrated EMI mitigation mechanisms.
  • Active EMI Filter for enhanced EMI performance at lower frequencies.
  • Selectable dual random spread spectrum (DRSS) for enhanced EMI performance across low and high-frequency bands.
  • EMI reduced by an average of 25 dBµV.
  • Reduces the external differential-mode input filter size by 50% and lowers systems c.

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Other Datasheets by Texas Instruments

Part Number Description
LM5149-Q1 DC/DC Controller
LM5140-Q1 Wide Input Range Dual Synchronous Buck Controller
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LM5143 3.5-V to 65-V Dual Synchronous Buck DC/DC Controller
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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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LM5149 SNVSBV4A – DECEMBER 2020 – REVISED JANUARY 2023 LM5149 80-V, Synchronous, Buck, DC/DC Controller with Ultra-Low IQ and Integrated Active EMI Filter 1 Features • Functional Safety-Capable – Documentation available to aid functional safety system design • Two integrated EMI mitigation mechanisms – Active EMI Filter for enhanced EMI performance at lower frequencies – Selectable dual random spread spectrum (DRSS) for enhanced EMI performance across low and high-frequency bands – EMI reduced by an average of 25 dBµV – Reduces the external differential-mode input filter size by 50% and lowers systems cost – Optimized for CISPR 32 Class B requirements • Versatile synchronous buck DC/DC controller – Wide input voltage range of 3.5 V to 80 V – 1% accurate, fixed 3.