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PMP21107

Wide input synchronous buck converter reference design with frequency spread spectrum

Design files

PMP21107

Design files

Overview

This reference design is a synchronous buck converter for automotive applications utilizing a synchronous buck controller with frequency spread spectrum. The design uses a dual MOSFET in power SO-8 package. Forced pulse width modulation (FPWM) or diode emulation mode (DEMB) is jumper selectable. The features include an enable input and power good flag. The switching frequency is set to 440 kHz. Frequency dithering and input filtering help improve EMI performance. Modified frequency compensation supports all ceramic output capacitors.

Features
  • All ceramic output capacitors for increased reliability
  • Peak current-mode control simplifies compensation design
  • On-board EMI filter eases compliance testing
  • Frequency dithering improves EMI performance
  • Dual MOSFET improves switching performance
Output voltage options PMP21107.1
Vin (Min) (V) 5.5
Vin (Max) (V) 42
Vout (Nom) (V) 3.3
Iout (Max) (A) 5
Output Power (W) 16.5
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

download Test report — PMP21107
TIDT075.PDF (3088 KB)

Test results for the reference design, including efficiency graphs, test prerequisites and more

download Assembly drawing — PMP21107
TIDRYP2.PDF (93 KB)

Detailed overview of design layout for component placement

download Bill of materials (BOM) — PMP21107
TIDRYP1.PDF (99 KB)

Complete listing of design components, reference designators, and manufacturers/part numbers

download CAD/CAE symbol — PMP21107
TIDRYP4.ZIP (615 KB)

Files used for 3D models or 2D drawings of IC components

download Gerber file — PMP21107
TIDCF84.ZIP (372 KB)

Design file that contains information on physical board layer of design PCB

download PCB layout — PMP21107
TIDRYP3.PDF (717 KB)

PCB layer plot file used for generating PCB design layout

download Schematic — PMP21107
TIDRYP0.PDF (174 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM25141-Q1 — Automotive 2.2-MHz, low-IQ synchronous buck controller with frequency spread spectrum

Data sheet: PDF | HTML

Start development

Software

Calculation tool

LM25141DESIGN-CALC — LM25141-Q1 controller quickstart design tool

Welcome to the LM25141-Q1 quickstart calculator design tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM25141-Q1 42-V synchronous buck DC/DC controller with low IQ. As such, the user can expeditiously arrive at an (...)
Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM25141 — Low Iq, Wide Input Range Synchronous Buck Controller LM25141-Q1 — Automotive 2.2-MHz, low-IQ synchronous buck controller with frequency spread spectrum
Hardware development
Reference design
PMP21107 — Wide input synchronous buck converter reference design with frequency spread spectrum
Evaluation board
LM5141QRGEVM — LM5141QRG Synchronous Buck Converter Evaluation Module
Download options

LM25141DESIGN-CALC — LM25141-Q1 controller quickstart design tool

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Version: A6
Release date: Mar 6, 2025
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LM25141-Q1_quickstart_calculator_revA6.xlsm  — 1749 K

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Products
AC/DC & DC/DC controllers (external FET)
LM25141 — Low Iq, Wide Input Range Synchronous Buck Controller LM25141-Q1 — Automotive 2.2-MHz, low-IQ synchronous buck controller with frequency spread spectrum
Hardware development
Reference design
PMP21107 — Wide input synchronous buck converter reference design with frequency spread spectrum
Evaluation board
LM5141QRGEVM — LM5141QRG Synchronous Buck Converter Evaluation Module

Release Information

Welcome to the quickstart design tool for the LM25141 and LM25141-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 external 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
* Test report Wide input synchronous buck converter reference design Jan 15, 2019

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