LM27403 High Efficiency 12V to 1.2V/25A Buck Eval Kit With Temp Compensated DCR Current Sensing


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The LM27403 EVM is a 300-kHz, high efficiency, synchronous buck converter with voltage-mode control and inductor DCR current sensing for overcurrent protection. An inexpensive 2N3904 BJT is used to sense temperature at the inductor. This enables correction for the inductor DCR’s variation over temperature as well as provide a thermal shutdown function based on a desired temperature setpoint.

  • 25A output current
  • 3V to 20V input voltage range
  • Switching frequency 250kHz
  • High efficiency, 91%, 1.2V 25A
  • DCR current sensing with temperature compensation

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Part Number Buy from Texas Instruments or Third Party Buy from authorized distributors Status Lead-Free   RoHS   REACH   WEEE   HI-V (>50VRMS/75 VDC)   CE   CE-EMC   CE-RTTE/LVD   FCC  

LM27403 High Efficiency 12V to 1.2V/25A Buck Eval Kit With Temp Compensated DCR Current Sensing


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Technical Documents
Datasheet (1)
Title Abstract Type Size (KB) Date Views
PDF 1785 12 Sep 2014
User Guides (2)
Title Abstract Type Size (KB) Date Views
PDF 996 17 Oct 2013 186
PDF 2433 16 Oct 2013 264

TI Devices (1)

Part Number Name Product Family
LM27403  3-20V, Voltage Mode Synchronous Buck Controller with Temperature-Compensated DCR Current Sensing  Controller (External Switch) 
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