Home Power management DC/DC switching regulators Step-down (buck) regulators Buck converters (integrated switch)

TPS54678

ACTIVE

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

A newer version of this product is available

open-in-new Compare alternates
Similar functionality to the compared device
TPS62867 ACTIVE 2.4-V to 5.5-V input, 6-A synchronous step-down converter in 1.5-mm x 2.5-mm QFN package Newer generation of 6-A devices with <30mm² total BOM size.
TPS62869 ACTIVE 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

Product details

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) (mA) 0.57 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2000 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 150 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
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) (mA) 0.57 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2000 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 150 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
WQFN (RTE) 16 9 mm² 3 x 3
  • 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
  • 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

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.

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.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 10
Type Title Date
* Data sheet TPS54678 2.95-V to 6-V Input, 6-A Synchronous Step-Down SWIFT™ Converter With Hiccup Current Limit datasheet (Rev. B) PDF | HTML 06 May 2019
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Application note Calculating Efficiency (Rev. A) 06 Mar 2020
Application note Minimizing Output Ripple During Startup (Rev. A) 20 May 2019
Selection guide SWIFT DC/DC Converters Selector Guide (Rev. G) 06 Feb 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Minimizing Output Ripple During Startup 22 Jun 2017
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) PDF | HTML 19 Apr 2016
User guide TPS54678EVM-155 6-A, SWIFT™ Regulator Evaluation Module 13 Jun 2012
Application note Understanding Thermal Dissipation and Design of a Heatsink 04 May 2011

Design & development

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

Evaluation board

TPS54678EVM-155 — TPS54678 Evaluation Module

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.
User guide: PDF
Not available on TI.com
Simulation model

TPS54678 TINA TI Startup Reference Design

SLVMAH0.TSC (274 KB) - TINA-TI Reference Design
Simulation model

TPS54678 TINA TI Steadystate Reference Design

SLVMAH1.TSC (319 KB) - TINA-TI Reference Design
Simulation model

TPS54678 TINA TI Transient Model

SLVMAH2.ZIP (47 KB) - TINA-TI Spice Model
Simulation model

TPS54678 Unencrypted PSpice Average Model Package (Rev. A)

SLVM610A.ZIP (37 KB) - PSpice Model
Simulation model

TPS54678 Unencrypted PSpice Transient Model Package (Rev. A)

SLVMAG0A.ZIP (124 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Reference designs

PMP4481 — 3-6Vin, 0.6-3.3Vo/6A Pico Module Reference Design

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.
Test report: PDF
Schematic: PDF
Reference designs

PMP10900 — 3.3V 5A Buck Converter with 2-Stage LC Filter Reference Design

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.
Test report: PDF
Schematic: PDF
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