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LMS3655 - 400-kHz DC-DC Step-Down Converter

General Description

The LMS3655 synchronous buck regulators are optimized for high performance applications, providing an adjustable output of 1 V to 20 V.

Seamless transition between PWM and PFM modes, along with a low quiescent current, ensures high efficiency and superior transient responses at all loads.

Key Features

  • 1 96% Peak Efficiency While Converting 12 V to 5 V.
  • Low EMI and Switch Noise.
  • Minimized Switch Node Ringing.
  • Pseudo-Random Spread Spectrum.
  • 400-kHz (±10%) Fixed Switching Frequency.
  • 40°C to +150°C Junction Temperature Range.
  • External Frequency Synchronization.
  • RESET Output With Internal Filter and 3-ms Release Timer.
  • Automatic Light Load Mode for Improved Efficiency.
  • Pin-Selectable Forced PWM Mode.

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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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Product Folder Order Now Technical Documents Tools & Software Support & Community LMS3655 SNAS744B – JULY 2017 – REVISED MARCH 2018 LMS3655 5.5-A, 36-V Synchronous, 400-kHz DC-DC Step-Down Converter 1 Features •1 96% Peak Efficiency While Converting 12 V to 5 V • Low EMI and Switch Noise – Minimized Switch Node Ringing – Pseudo-Random Spread Spectrum • 400-kHz (±10%) Fixed Switching Frequency • –40°C to +150°C Junction Temperature Range • External Frequency Synchronization • RESET Output With Internal Filter and 3-ms Release Timer • Automatic Light Load Mode for Improved Efficiency • Pin-Selectable Forced PWM Mode • Built-In Compensation, Soft Start, Current Limit, Thermal Shutdown, and UVLO • 0.35-V Dropout With 3.5-A Load at 25°C (Typical) • 32-µA IQ_VIN: Quiescent Current at 3.