TPS54678

AKTIV

Synchroner Abwärtswandler SWIFT™, 2,95 bis 6 V Eingang, 6A, mit Hiccup-Strombegrenzung

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Datenblatt

document-pdfAcrobat TPS54678 2.95-V to 6-V Input, 6-A Synchronous Step-Down SWIFT™ Converter With Hiccup Current Limit datasheet (Rev. B) (Englisch) PDF | HTML

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TPS54678

AKTIV

Datenblatt

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Produktdetails

Rating

Catalog

Topology

Buck

Iout (max) (A)

6

Vin (max) (V)

6

Vin (min) (V)

2.95

Vout (max) (V)

4.5

Vout (min) (V)

0.6

Features

Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable

Control mode

current mode

Operating temperature range (°C)

-40 to 150

Iq (typ) (A)

0.00057

Duty cycle (max) (%)

98

Rating

Catalog

Topology

Buck

Iout (max) (A)

6

Vin (max) (V)

6

Vin (min) (V)

2.95

Vout (max) (V)

4.5

Vout (min) (V)

0.6

Features

Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable

Control mode

current mode

Operating temperature range (°C)

-40 to 150

Iq (typ) (A)

0.00057

Duty cycle (max) (%)

98

WQFN (RTE)

16

9 mm² (3 mm × 3 mm)

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 (V_REF) 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 (V_REF) 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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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen	Datum
*	Datenblatt	TPS54678 2.95-V to 6-V Input, 6-A Synchronous Step-Down SWIFT™ Converter With Hiccup Current Limit datasheet (Rev. B)	PDF \| HTML	06.05.2019
	Anwendungshinweis	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	25.03.2024
	Auswahlhilfe	Buck Converter Quick Reference Guide (Rev. B)		08.04.2021
	Anwendungshinweis	Calculating Efficiency (Rev. A)		06.03.2020
	Anwendungshinweis	Minimizing Output Ripple During Startup (Rev. A)		20.05.2019
	Auswahlhilfe	SWIFT DC/DC Converters Selector Guide (Rev. G)		06.02.2019
	Auswahlhilfe	Power Management Guide 2018 (Rev. R)		25.06.2018
	Anwendungshinweis	Understanding Thermal Dissipation and Design of a Heatsink		04.05.2011

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

TPS54678EVM-155 — TPS54678-Evaluierungsmodul

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.

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