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LM3687 - Step-Down DC-DC Converter

Description

The LM3687 is a step-down DC-DC converter with an integrated low dropout Linear Regulator optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries.

Features

  • 1 2DC-DC Converter:.
  • 750mA Maximum Load Capability.
  • 1.8MHz PWM Fixed Switching Frequency (Typ. ).
  • Automatic PFM/PWM Mode Switching.
  • 27µA typ. Quiescent Current.
  • Internal Synchronous Rectification for High Efficiency.
  • Internal Soft Start Dual Rail Linear Regulator:.
  • Startup Mode.
  • Load Transients < 25mVpeak Typ.
  • Line Transients < 1mVpeak Typ.
  • Very Low Dropout Voltage: 82mV Typ. at 350mA Load Current.

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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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LM3687 www.ti.com SNVS473B – DECEMBER 2007 – REVISED MAY 2013 LM3687 Step-Down DC-DC Converter with Integrated Low Dropout Regulator and Startup Mode Check for Samples: LM3687 FEATURES 1 2DC-DC Converter: • 750mA Maximum Load Capability • 1.8MHz PWM Fixed Switching Frequency (Typ.) • Automatic PFM/PWM Mode Switching • 27µA typ. Quiescent Current • Internal Synchronous Rectification for High Efficiency • Internal Soft Start Dual Rail Linear Regulator: • Startup Mode • Load Transients < 25mVpeak Typ. • Line Transients < 1mVpeak Typ. • Very Low Dropout Voltage: 82mV Typ. at 350mA Load Current • 0.7V ≤ VIN_LIN ≤ 4.
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