PMP23117

3.3-V, 24-A, four-phase reference design for automotive applications

PMP23117

Design files

Overview

This four-phase reference design provides 3.3 VOUT at 24 A from a 3.8-V to 16-V automotive power source. The design uses two LMQ644A2-Q1 dual-channel synchronous buck regulators operating at a nominal switching frequency of 500 kHz. Forced pulse width modulation (FPWM) or pulse frequency modulation (PFM) for light load operation is jumper selectable. Test points are provided for frequency synchronization, power good and frequency response injection.

Features
  • Dual-phase integrated-switch regulators for small solution size
  • Selectable FPWM or PFM operation at light load
  • 3.8-V minimum input for cold cranking
  • 500-kHz switching frequency for best size versus efficiency
  • Spread spectrum option for low EMI
  • Tested to EN 55025 class 5 conducted emissions
Output voltage options PMP23117.1
Vin (Min) (V) 3.8
Vin (Max) (V) 16
Vout (Nom) (V) 3.3
Iout (Max) (A) 24
Output Power (W) 79.2
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous^Multiphase
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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.

PDF | HTML
TIDT322.PDF (1100 K)

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

TIDMBR8.PDF (383 K)

Detailed schematic diagram for design layout and components

TIDMBR9.PDF (415 K)

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

TIDMBS0.PDF (331 K)

Detailed overview of design layout for component placement

TIDMBS2.ZIP (1648 K)

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

TIDCGG6.ZIP (691 K)

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

TIDMBS1.PDF (1574 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

LMQ64480-Q1Automotive, 36V, 8A, low-IQ dual-output synchronous step-down converter

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

LMQ644A0-Q1Automotive, 36V, 10A, low-IQ dual-output synchronous step-down converter

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

LMQ644A2-Q1Automotive, 36V, 12A, low-IQ dual-output synchronous step-down converter

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report 3.3-V, 24-A, 4-Phase Reference Design for Automotive Applications PDF | HTML Aug. 24, 2023

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