This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
3-20V, Voltage Mode Synchronous Buck Controller with Temperature-Compensated DCR Current Sensing


Models (2)

Title Category Type Date
LM27403 Unencrypted PSpice Transient Model PSpice Model ZIP 24 Mar 2015
LM27403 PSpice Transient Model (Rev. B) PSpice Model ZIP 04 Oct 2013

Design kits & evaluation modules (2)

Name Part# Type
Evaluation Module - LM27403 600kHz High Power Density POL LM27403EVM-POL600 Evaluation Modules & Boards
LM27403 High Efficiency 12V to 1.2V/25A Buck Eval Kit With Temp Compensated DCR Current Sensing LM27403EVM Evaluation Modules & Boards

Reference designs

High-Efficiency Small Form factor 150W Sync Buck Reference Design

PMP8000 is a single-phase synchronous switching regulator rated for 5V, 30A output from an input voltage of 12V. This design uses the LM27403 synchronous buck controller and two CSD87350Q5D power block MOSFETs to provide maximum efficiency when combined with a 250nH ferrite output inductor. This (...)

View the Important Notice for reference designs covering authorized use, intellectual property matters and disclaimers.

Description Part Number Company Tool Type
LM27403 Step-Down Regulator Delivering 0.9V at 30A Reference Design PMP7996 Texas Instruments Reference designs
LM27403 Step-Down Regulator Delivering 1.8V at 30A Reference Design PMP9254 Texas Instruments Reference designs

Development tools (1)

Name Part# Type
LM27403 PWM Regulator Design Tool Calculator LM27403DESIGN-CALC Calculation Tools
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LM27403

  Min   Max Range
Vin  V 3.0 to 20.0V
Vout  V 0.6 to 18.6V
Iout  A ≤ 40A
Ambient Temp  °C -40 to 125°C