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LM5141DESIGN-CALC

LM5141-Q1 controller quickstart design tool

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LM5141DESIGN-CALC

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Overview

Welcome to the LM5141-Q1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM5141-Q1 65-V synchronous buck DC/DC controller with low IQ. As such, the user can expeditiously arrive at an optimized design to meet the application requirements.
Features
  • Determine buck inductance and input and output capacitances
  • Select components for soft-start, hiccup-mode restart, OCP, switching frequency and output voltage setpoint(s)
  • Optimize compensation values and pole/zero placement in terms of control loop stability using crossover frequency as a performance metric
  • Inspect regulator efficiency, solution size and component power dissipations with ambient temperature as a parameter
  • Review auto-generated schematic and BOM list
  • Determine EMI filter components and spread spectrum modulating frequency

Downloads

Calculation tool

LM5141DESIGN-CALC — LM5141-Q1 controller quickstart design tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM5141 — Low Iq, Wide Input Range Synchronous Buck Controller LM5141-Q1 — Automotive wide-input 2.2-MHz low-IQ synchronous buck controller
Hardware development
Reference design
PMP15019 — Automotive High Current, Wide VIN Synchronous Buck Controller Reference Design Featuring LM5141-Q1 PMP15041 — 25W Automotive Start-Stop Reference Design Operating at 2.2 MHz PMP20682 — Synchronous Buck Converter for Automotive Cluster Reference Design PMP20818 — 137W Holdup Converter for Storage Server Reference Design PMP21795 — Automotive EMI and thermally optimized synchronous buck converter reference design PMP30339 — Automotive Synchronous Buck With 3.3V @ 12.0A Reference Design TIDA-01413 — ADAS 8-Channel Sensor Fusion Hub Reference Design with Two 4-Gbps Quad Deserializers
Evaluation board
LM5141QRGEVM — LM5141QRG Synchronous Buck Converter Evaluation Module
Download options

LM5141DESIGN-CALC — LM5141-Q1 controller quickstart design tool

close
Latest version
Version: A6
Release date: Mar 6, 2025
open-in-new

View all versions

download

LM5141-Q1_quickstart_calculator_revA6.xlsm  — 1725 K

LM5141/-Q1 controller quickstart design tool

MD5 checksum
Products
AC/DC & DC/DC controllers (external FET)
LM5141 — Low Iq, Wide Input Range Synchronous Buck Controller LM5141-Q1 — Automotive wide-input 2.2-MHz low-IQ synchronous buck controller
Hardware development
Reference design
PMP15019 — Automotive High Current, Wide VIN Synchronous Buck Controller Reference Design Featuring LM5141-Q1 PMP15041 — 25W Automotive Start-Stop Reference Design Operating at 2.2 MHz PMP20682 — Synchronous Buck Converter for Automotive Cluster Reference Design PMP20818 — 137W Holdup Converter for Storage Server Reference Design PMP21795 — Automotive EMI and thermally optimized synchronous buck converter reference design PMP30339 — Automotive Synchronous Buck With 3.3V @ 12.0A Reference Design TIDA-01413 — ADAS 8-Channel Sensor Fusion Hub Reference Design with Two 4-Gbps Quad Deserializers
Evaluation board
LM5141QRGEVM — LM5141QRG Synchronous Buck Converter Evaluation Module

Release Information

Welcome to the quickstart design tool for the LM5141 and LM5141-Q1 synchronous buck controller family. This standalone tool facilitates and assists the power-supply engineer with the design of a DC/DC buck regulator with discrete MOSFETs. As such, the user can expeditiously arrive at an optimized design to meet the application requirements.

Additional resources you might need

Calculation tool

LM5141DESIGN-CALC — LM5141-Q1 controller quickstart design tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM5141 — Low Iq, Wide Input Range Synchronous Buck Controller LM5141-Q1 — Automotive wide-input 2.2-MHz low-IQ synchronous buck controller
Hardware development
Reference design
PMP15019 — Automotive High Current, Wide VIN Synchronous Buck Controller Reference Design Featuring LM5141-Q1 PMP15041 — 25W Automotive Start-Stop Reference Design Operating at 2.2 MHz PMP20682 — Synchronous Buck Converter for Automotive Cluster Reference Design PMP20818 — 137W Holdup Converter for Storage Server Reference Design PMP21795 — Automotive EMI and thermally optimized synchronous buck converter reference design PMP30339 — Automotive Synchronous Buck With 3.3V @ 12.0A Reference Design TIDA-01413 — ADAS 8-Channel Sensor Fusion Hub Reference Design with Two 4-Gbps Quad Deserializers
Evaluation board
LM5141QRGEVM — LM5141QRG Synchronous Buck Converter Evaluation Module
Download options

LM5141DESIGN-CALC — LM5141-Q1 controller quickstart design tool

close
Latest version
Version: A6
Release date: Mar 6, 2025
open-in-new

View all versions

download

LM5141-Q1_quickstart_calculator_revA6.xlsm  — 1725 K

LM5141/-Q1 controller quickstart design tool

MD5 checksum
Products
AC/DC & DC/DC controllers (external FET)
LM5141 — Low Iq, Wide Input Range Synchronous Buck Controller LM5141-Q1 — Automotive wide-input 2.2-MHz low-IQ synchronous buck controller
Hardware development
Reference design
PMP15019 — Automotive High Current, Wide VIN Synchronous Buck Controller Reference Design Featuring LM5141-Q1 PMP15041 — 25W Automotive Start-Stop Reference Design Operating at 2.2 MHz PMP20682 — Synchronous Buck Converter for Automotive Cluster Reference Design PMP20818 — 137W Holdup Converter for Storage Server Reference Design PMP21795 — Automotive EMI and thermally optimized synchronous buck converter reference design PMP30339 — Automotive Synchronous Buck With 3.3V @ 12.0A Reference Design TIDA-01413 — ADAS 8-Channel Sensor Fusion Hub Reference Design with Two 4-Gbps Quad Deserializers
Evaluation board
LM5141QRGEVM — LM5141QRG Synchronous Buck Converter Evaluation Module

Release Information

Welcome to the quickstart design tool for the LM5141 and LM5141-Q1 synchronous buck controller family. This standalone tool facilitates and assists the power-supply engineer with the design of a DC/DC buck regulator with discrete MOSFETs. As such, the user can expeditiously arrive at an optimized design to meet the application requirements.

Technical documentation

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Type Title Date
EVM User's guide LM5141-Q1 EVM User’s Guide (Rev. A) Jan 10, 2018

Related design resources

Hardware development

EVALUATION BOARD
LM5141QRGEVM — LM5141QRG Synchronous Buck Converter Evaluation Module

Reference designs

REFERENCE DESIGN
PMP15019 — Automotive High Current, Wide VIN Synchronous Buck Controller Reference Design Featuring LM5141-Q1 PMP15041 — 25W Automotive Start-Stop Reference Design Operating at 2.2 MHz PMP20682 — Synchronous Buck Converter for Automotive Cluster Reference Design PMP20818 — 137W Holdup Converter for Storage Server Reference Design PMP21795 — Automotive EMI and thermally optimized synchronous buck converter reference design PMP30339 — Automotive Synchronous Buck With 3.3V @ 12.0A Reference Design TIDA-01413 — ADAS 8-Channel Sensor Fusion Hub Reference Design with Two 4-Gbps Quad Deserializers

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