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LM3370 - Dual Synchronous Step-Down DC-DC Converter

Description

The LM3370 is a dual step-down DC-DC converter optimized for powering ultra-low voltage circuits from a single Li-Ion battery and input rail ranging from 2.7V to 5.5V.

It provides two outputs with 600mA load per channel.

Features

  • 1.
  • 2 I2C-compatible interface.
  • VOUT1 = 1V to 2V in 50 mV Steps.
  • VOUT2 = 1.8V to 3.3V in 100 mV Steps.
  • Automatic PFM/PWM Mode Switching and Forced PWM Mode for Low Noise Operation.
  • Spread Spectrum Capability Using I2C.
  • 600mA Load Per Channel.
  • 2MHz PWM Fixed Switching Frequency (Typ. ).
  • The Bucks Operate 180° Out-of-Phase Timing Offset for Noise and Input Surge Current Abatement.
  • Internal Synchronous Rectification for H.

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Full PDF Text Transcription

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LM3370 www.ti.com SNVS406N – NOVEMBER 2005 – REVISED MAY 2013 LM3370 Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function Check for Samples: LM3370 FEATURES 1 •2 I2C-compatible interface – VOUT1 = 1V to 2V in 50 mV Steps – VOUT2 = 1.8V to 3.3V in 100 mV Steps – Automatic PFM/PWM Mode Switching and Forced PWM Mode for Low Noise Operation – Spread Spectrum Capability Using I2C • 600mA Load Per Channel • 2MHz PWM Fixed Switching Frequency (Typ.) • The Bucks Operate 180° Out-of-Phase Timing Offset for Noise and Input Surge Current Abatement • Internal Synchronous Rectification for High Efficiency • Internal Soft Start • Power-on-Reset Function for Both Outputs • 2.7V ≤ VIN ≤ 5.5V • Operates from a Single Li-Ion Cell or 3 Cell NiMH/NiCd Batteries and 3.3V/5.
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