This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
Wide Input 4.5-V to 100-V, 1-A Synchronous Buck / Fly-Buck Converter


Models (3)

Title Category Type Date
LM5161 Unencrypted PSpice Buck and Fly-Buck Transient Model PSpice Model ZIP 23 Aug 2016
LM5161 PSpice Buck and Fly-Buck Transient Model PSpice Model ZIP 22 Aug 2016
Export TINA-TI Transient Spice Model from WEBENCH (Rev. A) TINA-TI Spice Model PDF 06 Nov 2015

Design kits & evaluation modules (2)

Name Part# Type
LM5161 Wide VIN Fly-Buck Evaluation Module LM5161PWPFBKEVM Evaluation Modules & Boards
LM5161 Wide VIN Synchronous Buck Converter Constant On-Time Evaluation Module LM5161PWPBKEVM Evaluation Modules & Boards

Reference designs

48Vin Digital POL with 3 Outputs Reference Design

The PMP4486 is a GaN-based reference design solution for telecom and computing applications. The GaN module LMG5200 enables a high efficiency single stage conversion with an input range from 36 to 60V down to 29V, 12V and 1.0V. This design shows the benefits of a GaN based design with high (...)

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

Software (2)

LM5161 Fly-Buck Quick Start Component Selector  (ZIP 287 KB )    22 Sep 2016  
LM5161 Buck Quick Start Component Selector  (ZIP 383 KB )    22 Sep 2016  

Development tools (1)

Name Part# Type
Fly-Buck and Flyback Topology Selector FLYBUCK-FLYBACK-DESIGN-CALC Calculation Tools
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LM5161

  Min   Max Range
Vin  V 4.5 to 100.0V
Vout  V 2 to 92V
Iout  A ≤ 1A
Ambient Temp  °C -40 to 125°C