High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization
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High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization

  • Two synchronous buck regulators
  • 180°out of phase operation
  • Synchronizable switching frequency from 150 kHz to 250 kHz
  • 4.5 V to 36 V input range
  • 50µA shutdown current
  • Adjustable output from 1.3 V to 90% of Vin
  • 0.04% (typical) line and load regulation error
  • Current mode control with or without a sense resistor
  • Independent enable/soft-start pins allow simple sequential startup configuration
  • Configurable for single output parallel operation.
  • Adjustable cycle-by-cycle current limit
  • Input under-voltage lockout
  • Output over-voltage latch protection
  • Output under-voltage protection with delay
  • Thermal shutdown
  • Self discharge of output capacitors when the regulator is OFF
  • TSSOP package


  • Embedded Computer Systems
  • Telecom Systems
  • Set-Top Boxes
  • WebPAD
  • Point Of Load Power Architectures


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High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization


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Technical documentation
User guides (1)
Title Type Size (KB) Date
PDF 2617 25 Apr 2013
More literature (2)
Title Type Size (KB) Date
PDF 38 02 Jan 2019
PDF 39 02 Jan 2019

TI Devices (1)

Part Number Name Product Family
LM5642  4.5-36V, Current Mode Dual Synchronous Buck Controller with Oscillator Synchronization  Step-down (buck) regulators 

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