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LM5137-LM25137-DESIGN-CALC

LM5137/-Q1 and LM25137/-Q1 quickstart calculator

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Latest version
Version: B6
Release date: Aug 11, 2025
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LM5137-Q1_quickstart_calculator_revB6.xlsm  — 2426 K

LM(2)5137(F)/-Q1 quickstart calculator

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Products
AC/DC & DC/DC controllers (external FET)
LM25137 — 42V, 100% duty-cycle capable dual-channel synchronous buck controller LM25137-Q1 — Automotive, 42V, 100% duty-cycle capable dual-channel synchronous buck controller LM25137F-Q1 — Automotive, 42V, 100% duty-cycle, dual-channel, functional safety synchronous buck controller LM5137 — 80V, 100% duty-cycle capable dual-channel synchronous buck controller LM5137-Q1 — Automotive, 80V, 100% duty-cycle capable dual-channel synchronous buck controller LM5137F-Q1 — Automotive, 80V, 100% duty cycle, dual-channel, functional safety synchronous buck controller
Hardware development
Evaluation board
LM25137F-Q1-EVM5D3 — LM25137F-Q1 evaluation module LM5137F-Q1-EVM12V — LM5137F-Q1 evaluation module

Release Information

Welcome to the quickstart design tool for the LM5137(F), LM5137(F)-Q1, LM25137(F) and LM25137(F)-Q1 controller family, where the "F" suffix designates an intention for functional-safety applications. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator using this controller family. As such, the user can expeditiously arrive at an optimized design to meet the application requirements.