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

TPS54678

現行

具 Hiccup 電流限制的 2.95V 至 6V 輸入、6A 同步降壓 SWIFT™ 轉換器

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TPS62867 現行 採用 1.5-mm x 2.5-mm QFN 封裝的 2.4-V 至 5.5-V 輸入、6-A 同步降壓轉換器 Newer generation of 6-A devices with <30mm² total BOM size.
TPS62869 現行 採用 1.5-mm x 2.5-mm QFN 封裝且具 I²C 介面的 5.5-V 6-A 同步降壓轉換器 Newer generation of 6-A devices

TPS54678

現行
產品規格表 立即訂購

產品詳細資料

Iout (max) (A) 6 Vin (min) (V) 2.95 Vin (max) (V) 6 Topology Buck Type Converter 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 Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.00057
Iout (max) (A) 6 Vin (min) (V) 2.95 Vin (max) (V) 6 Topology Buck Type Converter 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 Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.00057
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.
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類型 標題 日期
* 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 2019年 5月 6日
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
Application note Calculating Efficiency (Rev. A) 2020年 3月 6日
Application note Minimizing Output Ripple During Startup (Rev. A) 2019年 5月 20日
Selection guide SWIFT DC/DC Converters Selector Guide (Rev. G) 2019年 2月 6日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Application note Minimizing Output Ripple During Startup 2017年 6月 22日
User guide TPS54678EVM-155 6-A, SWIFT™ Regulator Evaluation Module 2012年 6月 13日
Application note Understanding Thermal Dissipation and Design of a Heatsink 2011年 5月 4日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

TPS54678EVM-155 — TPS54678 評估模組

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.
使用指南: PDF
TI.com 無法提供
模擬型號

TPS54678 TINA TI Startup Reference Design

SLVMAH0.TSC (274 KB) - TINA-TI Reference Design
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模擬型號

TPS54678 TINA TI Steadystate Reference Design

SLVMAH1.TSC (319 KB) - TINA-TI Reference Design
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模擬型號

TPS54678 TINA TI Transient Model

SLVMAH2.ZIP (47 KB) - TINA-TI Spice Model
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模擬型號

TPS54678 Unencrypted PSpice Average Model Package (Rev. A)

SLVM610A.ZIP (37 KB) - PSpice Model
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模擬型號

TPS54678 Unencrypted PSpice Transient Model Package (Rev. A)

SLVMAG0A.ZIP (124 KB) - PSpice Model
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參考設計

PMP4481 — 3-6Vin、0.6-3.3Vo/6A Pico 模組參考設計

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
電路圖: PDF
參考設計

PMP10900 — 具有 2 級 LC 濾波器的 3.3V 5A 降壓轉換器參考設計

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
電路圖: PDF
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