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LM2657 - Dual Synchronous Buck Regulator Controller

Description

The LM2657 is an adjustable 200kHz-500kHz dual channel voltage-mode controlled high-speed synchronous buck regulator controller ideally suited for high current applications.

The LM2657 requires only N-channel FETs for both the upper and lower positions of each stage.

Features

  • 1.
  • 2 Input Voltage Range from 4.5V to 28V.
  • Synchronous Dual-Channel Interleaved Switching.
  • Forced-PWM or Pulse-Skip Modes.
  • Lossless Bottom-Side FET Current Sensing.
  • Adaptive Duty Cycle Clamp.
  • High Current N-Channel FET Drivers.
  • Low Shutdown Supply Current.
  • Reference Voltage Accurate to within ±1.5%.
  • Output Voltage Adjustable Down to 0.6V.
  • Power Good Flag and Chip Enable.
  • Under-Voltage Lockout.

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Datasheet preview – LM2657

Datasheet Details

Part number LM2657
Manufacturer Texas Instruments
File Size 760.06 KB
Description Dual Synchronous Buck Regulator Controller
Datasheet download datasheet LM2657 Datasheet
Additional preview pages of the LM2657 datasheet.

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Full PDF Text Transcription

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LM2657 www.ti.com SNVS342B – JANUARY 2005 – REVISED MARCH 2013 LM2657 Dual Synchronous Buck Regulator Controller Check for Samples: LM2657 FEATURES 1 •2 Input Voltage Range from 4.5V to 28V • Synchronous Dual-Channel Interleaved Switching • Forced-PWM or Pulse-Skip Modes • Lossless Bottom-Side FET Current Sensing • Adaptive Duty Cycle Clamp • High Current N-Channel FET Drivers • Low Shutdown Supply Current • Reference Voltage Accurate to within ±1.5% • Output Voltage Adjustable Down to 0.
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