TIDA-01466

Low-Voltage, Low-Noise Power-Supply Reference Design for Ultrasound Front End

TIDA-01466

Design files

Overview

This reference design is a power supply optimized specifically for providing power to eight 16-channel receive AFE ICs for ultrasound imaging systems. This design reduces part count while maximizing efficiency by using single-chip DC-DC converter + LDO combo regulators to set the LDO input just above the dropout voltage while taking full advantage of the LDO PSRR.  In addition, ultra-low-noise LDOs help to attain the highest resolution possible from A/D conversion, leading to higher image quality. This design is capable of switching frequency synchronization with the master and system clock frequency to aid system designers apply simple filtering techniques to remove power supply switching noise on ground loops or use spreadspectrum clocking to reduce EMI. Additionally, the design implements an eFuse device, providing a simple and flexible means of overcurrent protection.

Features
  • Suitable for 12V input ultrasound system front end
  • eFuse operating with input current limit of 4.2A
  • Capable of powering eight AFEs for up to 128 channels (scalable channel count), supports power output of 36W
  • Combo DC/DC converter + LDO ICs maximizes LDO efficiency by setting LDO input just above dropout voltage
  • Uses high PSRR and ultra-low-noise (4.4 μVRMS) LDOs to attain highest resolution possible from A/D conversion
  • Common synchronized power supply for all AFEs on same T/R board reduces board space while aiding noise reduction and EMI elimination

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.

TIDUD73.PDF (1293 K)

Reference design overview and verified performance test data

TIDRSP4.PDF (1003 K)

Detailed schematic diagram for design layout and components

TIDRSP5.PDF (172 K)

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

TIDRSP6.PDF (371 K)

Detailed overview of design layout for component placement

TIDRSP8.ZIP (1173 K)

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

TIDCDU4.ZIP (1848 K)

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

TIDRSP7.PDF (1795 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS548244.5-V to 17-V, 8-A synchronous SWIFT™ buck converter in HotRod™ QFN

Data sheet document-pdfAcrobat PDF open-in-new HTML
Clock buffers

CDCLVC1106Low jitter, 1:6 LVCMOS fan-out clock buffer

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TLV704150-mA, 24-V, ultra-low-IQ, low-dropout voltage regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A83002-A, low-VIN, low-2-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good wi

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A843-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy

Data sheet document-pdfAcrobat PDF open-in-new HTML
Sequencers

LM38813 rail simple power sequencer with adjustable time delay

Data sheet document-pdfAcrobat PDF open-in-new HTML
eFuses & hot swap controllers

TPS259264.5-V to 13.8-V, 30mΩ, 2-5A eFuse

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide Low-Voltage, Low-Noise Power Supply Reference Design For Ultrasound AFE Sep. 20, 2017
Technical article Take your ultrasound design to the next level Feb. 08, 2018

Related design resources

Reference designs

REFERENCE DESIGN
TIDA-01458 Low-Noise Fixed Drop-Out ±2.5 to ±12-VOUT 3A Power Supply Reference Design for Ultrasound CW Pulser

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