TPS54334

AKTIV

Synchroner Abwärtswandler, 4,2V bis 28 V Eingangsspannung, 3A Ausgangsstrom, mit fester Frequenz von

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Datenblatt

document-pdfAcrobat TPS54334 4.2-V to 28-V Input Voltage, 3-A Output Current Synchronous Step-Down Voltage Converter datasheet (Rev. A) (Englisch) PDF | HTML

TPS54334

AKTIV

Jetzt bestellen

Produktdetails

Rating

Catalog

Topology

Buck

Iout (max) (A)

3

Vin (max) (V)

28

Vin (min) (V)

4.2

Vout (max) (V)

25

Vout (min) (V)

0.8

Features

Enable, Light-load efficiency, Power good, Soft-start fixed, Synchronous rectification, UVLO adjustable

Control mode

current mode

Operating temperature range (°C)

-40 to 150

Iq (typ) (A)

0.0006

Duty cycle (max) (%)

90

Rating

Catalog

Topology

Buck

Iout (max) (A)

3

Vin (max) (V)

28

Vin (min) (V)

4.2

Vout (max) (V)

25

Vout (min) (V)

0.8

Features

Enable, Light-load efficiency, Power good, Soft-start fixed, Synchronous rectification, UVLO adjustable

Control mode

current mode

Operating temperature range (°C)

-40 to 150

Iq (typ) (A)

0.0006

Duty cycle (max) (%)

90

VSON (DRC)

10

9 mm² (3 mm × 3 mm)

HSOIC (DDA)

8

29.4 mm² (4.9 mm × 6 mm)

Two 128mΩ/84mΩ MOSFETs for 3A Continuous
Output Current
Power Good
Low 2 µA Shutdown Quiescent Current
0.8 V Internal Voltage Reference with ±1.5%
Accuracy Over Temperature
Fixed-Frequency Current Mode Control
Pulse Skipping Boosts Efficiency at Light Loads
Overcurrent Protection for Both MOSFETs with
Hiccup Mode for Severe Fault Conditions
Thermal and Overvoltage Transient Protection
Available in Easy-to-Use 8-Pin SOIC
PowerPAD™ and 10-Pin SON
Monotonic Start-Up into Pre-biased Outputs

Two 128mΩ/84mΩ MOSFETs for 3A Continuous
Output Current
Power Good
Low 2 µA Shutdown Quiescent Current
0.8 V Internal Voltage Reference with ±1.5%
Accuracy Over Temperature
Fixed-Frequency Current Mode Control
Pulse Skipping Boosts Efficiency at Light Loads
Overcurrent Protection for Both MOSFETs with
Hiccup Mode for Severe Fault Conditions
Thermal and Overvoltage Transient Protection
Available in Easy-to-Use 8-Pin SOIC
PowerPAD™ and 10-Pin SON
Monotonic Start-Up into Pre-biased Outputs

The TPS54334 is a 28-V, 3-A, low quiescent supply current (I_Q), synchronous monolithic buck converter with integrated MOSFETs.

The TPS54334 enables small designs by integrating the MOSFETs and implementing current mode control to reduce external component count.

Efficiency is maximized through the integrated 128mΩ/84mΩ MOSFETs, low quiescent supply current and pulse skipping at light loads. Using the enable pin, shutdown supply current is reduced to 2 µA by entering a shutdown mode.

The TPS54334 provides accurate regulation for a variety of loads with an accurate 1.5% voltage reference over temperature.

Cycle by cycle current limiting on the high-side fet protects the TPS54334 in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the part when die temperature exceeds thermal shutdown temperature and enables the part again after the built-in thermal hiccup time.

The TPS54334 is a 28-V, 3-A, low quiescent supply current (I_Q), synchronous monolithic buck converter with integrated MOSFETs.

The TPS54334 enables small designs by integrating the MOSFETs and implementing current mode control to reduce external component count.

Efficiency is maximized through the integrated 128mΩ/84mΩ MOSFETs, low quiescent supply current and pulse skipping at light loads. Using the enable pin, shutdown supply current is reduced to 2 µA by entering a shutdown mode.

The TPS54334 provides accurate regulation for a variety of loads with an accurate 1.5% voltage reference over temperature.

Cycle by cycle current limiting on the high-side fet protects the TPS54334 in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the part when die temperature exceeds thermal shutdown temperature and enables the part again after the built-in thermal hiccup time.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen
*	Datenblatt	TPS54334 4.2-V to 28-V Input Voltage, 3-A Output Current Synchronous Step-Down Voltage Converter datasheet (Rev. A)	PDF \| HTML	10.02.2016
	Anwendungshinweis	Measure Power Stage Gain and Slope Compensation in PCM (Peak Current Mode) BUCK (Rev. A)	PDF \| HTML	01.04.2019
	Anwendungshinweis	How to Estimate Overshoot and Undershoot of Load Transients of a DC/DC Regulator		20.12.2017
	Anwendungshinweis	Using TPS54335A to Create an Inverting Power Supply (Rev. A)		19.07.2017

Design und Entwicklung

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Evaluierungsplatine

TPS54334EVM-722 — TPS54334EVM-722 Evaluierungsmodul 3-A-Wandler

The TPS54334 is a 28-V, 3-A, low quiescent supply current (IQ), synchronous monolithic buck converter with integrated MOSFETs.The TPS54334 enables small designs by integrating the MOSFETs and implementing current mode control to reduce external component count.

Efficiency is maximized through the (...)

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