TPS54678

ACTIVE

2.95V to 6V Input, 6A Synchronous Step-Down SWIFT™ Converter with Hiccup Current Limit

Top

Product details

Parameters

Vin (Min) (V) 2.95 Vin (Max) (V) 6 Vout (Min) (V) 0.6 Vout (Max) (V) 4.5 Iout (Max) (A) 6 Iq (Typ) (uA) 570 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2000 Features Enable, Frequency Synchronization, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, UVLO Adjustable, Soft Start Adjustable Operating temperature range (C) -40 to 125, -40 to 150 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

WQFN (RTE) 16 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)

Features

  • Two 12-mΩ (typical) MOSFETs for high-efficiency 6-A continuous output current
  • 200-kHz to 2-MHz Switching frequency
  • 0.6-V ±1% Voltage reference over temperature (–40°C to 150°C)
  • Synchronizes to external clock
  • Start-Up with prebiased voltage
  • Power good output
  • Adjustable slow start and sequencing
  • Cycle-by-cycle current limit and hiccup current protection
  • Adjustable input voltage UVLO
  • Thermally enhanced 16-pin 3-mm × 3-mm WQFN (RTE)
  • Create a custom design using the TPS54678 with the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

open-in-new Find other Buck converters (integrated switch)

Description

TPS54678 device is a full-featured 6-V, 6-A, synchronous step-down current mode converter with two integrated MOSFETs.

TPS54678 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced WQFN package.

TPS54678 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature.

Efficiency is maximized through the integrated 12-mΩ MOSFETs. Using the enable (EN) pin, shutdown supply current is reduced by disabling the device.

The output voltage start-up ramp is controlled by the soft-start (SS) pin that can also be configured for sequencing or tracking. Monotonic start-up is achieved with prebiased voltage. Undervoltage lockout can be increased by programming the threshold with a resistor divider on the enable pin. An open-drain power good signal indicates the output is within 93% to 105% of its nominal voltage.

Cycle-by-cycle current limit, hiccup overcurrent protection and thermal shutdown protect the device during an overcurrent condition.

open-in-new Find other Buck converters (integrated switch)
Download
Similar products you might be interested in
open-in-new Compare products
Similar but not functionally equivalent to the compared device:
NEW TPS62869 PREVIEW 5.5-V 6-A synchronous step-down converter with I2C interface in 1.5-mm x 2.5-mm QFN package Newer generation of 6-A devices

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 12
Type Title Date
* Datasheet TPS54678 2.95-V to 6-V Input, 6-A Synchronous Step-Down SWIFT™ Converter With Hiccup Current Limit datasheet (Rev. B) May 06, 2019
Selection guide Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Application note Calculating Efficiency (Rev. A) Mar. 06, 2020
Application note Minimizing Output Ripple During Startup (Rev. A) May 20, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guide SWIFT DC/DC Converters Selector Guide (Rev. G) Feb. 06, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note Minimizing Output Ripple During Startup Jun. 22, 2017
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) Apr. 19, 2016
Technical articles Power Tips: Designing a two-stage LC filter Feb. 24, 2015
User guide TPS54678EVM-155 6-A, SWIFT™ Regulator Evaluation Module Jun. 13, 2012
Application note Understanding Thermal Dissipation and Design of a Heatsink May 04, 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
TPS54678 Evaluation Module
TPS54678EVM-155
25
Description
The Texas Instruments TPS54678EVM-155 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS54678 2.95V to 6V Output, 2MHz Synchronous Step-Down Switcher.
Features
  • UCD3138LLCEVM-028 LLC Resonant Half-Bridge DC/DC Converter Board
  • UCD3138CC64EVM-030 Control Card pre-programmed with LLC Resonant Half-bridge DC/DC Converter
  • USB Interface Adapter EVM (part number USB-to-GPIO)

Design tools & simulation

SIMULATION MODEL Download
SLVM610A.ZIP (37 KB) - PSpice Model
SIMULATION MODEL Download
SLVMAG0A.ZIP (124 KB) - PSpice Model
SIMULATION MODEL Download
SLVMAH0.TSC (274 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLVMAH1.TSC (319 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLVMAH2.ZIP (47 KB) - TINA-TI Spice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

REFERENCE DESIGNS Download
3-6Vin, 0.6-3.3Vo/6A Pico Module Reference Design
PMP4481 The PMP4481 reference design is designed for telecom application with a DC input of 3V~6V achieving the lowest component count. Detailed data is provided. The output voltage could be modified by resistors over the resistor divider from 0.6V to 3.3V. A typical application is for 0.9V/6A.
document-generic Schematic
REFERENCE DESIGNS Download
3.3V 5A Buck Converter with 2-Stage LC Filter Reference Design
PMP10900 PMP10900 is designed to provide a 3.3V/5A output from 5V input. A two-stage LC filter is used to reach output ripple voltage <1mV.
document-generic Schematic

CAD/CAE symbols

Package Pins Download
WQFN (RTE) 16 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Related videos