TPS54331

ACTIVE

3.5V to 28V Input, 3A, 570kHz Step-Down Converter with Eco-mode

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Product details

Parameters

Vin (Min) (V) 3.5 Vin (Max) (V) 28 Vout (Min) (V) 0.8 Vout (Max) (V) 25 Iout (Max) (A) 3 Iq (Typ) (uA) 110 Switching frequency (Min) (kHz) 570 Switching frequency (Max) (kHz) 570 Features Enable, Light Load Efficiency, UVLO Adjustable, Soft Start Adjustable Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 SOIC (D) 8 19 mm² 4.9 x 3.9 SOIC (D) 8 19 mm² 3.91 x 4.9 open-in-new Find other Buck converters (integrated switch)

Features

  • 3.5 to 28-V Input Voltage Range
  • Adjustable Output Voltage Down to 0.8 V
  • Integrated 80-mΩ High-Side MOSFET Supports up to 3-A Continuous Output Current
  • High Efficiency at Light Loads With a Pulse Skipping Eco-mode™
  • Fixed 570 kHz Switching Frequency
  • Typical 1-µA Shutdown Quiescent Current
  • Adjustable Slow-Start Limits Inrush Currents
  • Programmable UVLO Threshold
  • Overvoltage Transient Protection
  • Cycle-by-Cycle Current Limit, Frequency Fold Back, and Thermal Shutdown Protection
  • Available in Easy-to-Use SOIC8 Package or Thermally Enhanced SOIC8 PowerPAD™ Package
  • Create a Custom Design with WEBENCH Tools

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Description

The TPS54331 device is a 28-V, 3-A non-synchronous buck converter that integrates a low RDS(on) high-side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode feature is automatically activated. Furthermore, the 1-µA shutdown supply-current allows the device to be used in battery-powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the hysteresis of the input undervoltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle-by-cycle current-limit scheme, frequency foldback and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54331 device is available in an 8-pin SOIC package and 8-pin SO PowerPAD package that have been internally optimized to improve thermal performance.

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Same functionality and pinout but is not an equivalent to the compared device:
TPS54231 ACTIVE 3.5 to 28V Input, 2A, 570kHz Step-Down Converter with Eco-mode™ This product offers lower current (2 A).
TPS54332 ACTIVE 3.5V to 28V Input, 3.5A, 1MHz Step-Down Converter with Eco-mode This product offers higher switching frequency.

Technical documentation

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Type Title Date
* Datasheet TPS54331 3-A, 28-V Input, Step Down DC-DC Converter With Eco-mode™ datasheet (Rev. F) Oct. 24, 2014
Application note Low Dropout Operation in a Buck Converter (Rev. A) Apr. 01, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note Understanding Eco-mode(TM) Operation Dec. 05, 2016
Technical articles How-to Improve Buck Converter Light Load Efficiency with an LDO - Part 2 Sep. 02, 2014
Application note Demystifying Type II and Type III Compensators Using Op-Amp and OTA for DC/DC Co Jul. 11, 2014
Application note Simple CC/CV Charger using TPS54331 Nov. 30, 2012
Application note Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) Oct. 26, 2012
Application note Designing Type III Compensation for Current Mode Step-Down Converters (Rev. A) Sep. 15, 2010
Application note Efficiency of synchronous versus nonsynchronous buck converters Oct. 04, 2009
User guide TPS54331EVM-232 3-A, SWIFT™ Regulator Evaluation Module Jul. 11, 2008
Application note Understanding and Applying Current-Mode Control Theory Aug. 19, 2007
Application note Modeling, Analysis and Compensation of the Current-Mode Converter Sep. 05, 1999

Design & development

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

Hardware development

EVALUATION BOARD Download
10
Description

The TPS54331EVM-232 is a fully assembled and tested circuit for evaluating the TPS54331 synchronous step-down SWIFT™ converter. The EVM converts a 3.5-V to 28-V input voltage to a regulated 3.3-V output voltage that delivers up to 3-A output. The switching frequency is internally set at a (...)

Features
  • 3.5-V to 28-V wide input voltage range
  • 91.6% efficiency (VIN = 10 V, IO = 0.75 A)
  • Nominal 570-kH switching frequency
  • Adjustable output voltage

Design tools & simulation

SIMULATION MODEL Download
SLIM041A.TSC (390 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLIM042A.TSM (14 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SLVM659A.ZIP (55 KB) - PSpice Model
SIMULATION MODEL Download
SLVMC20.TSC (580 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLVMC21.ZIP (8 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
  • (...)
CALCULATION TOOL Download
Inverting Power Supply Calculator for SWIFT DC/DC with Integrated FETs
SWIFTINV-CALC The SWIFTINV-CALC Excel sheet is a complementary worksheet to the SLVA317 application note. The worksheet is used to calculate the external components needed to create a negative output voltage from a positive input voltage. The tool features several families of wide input voltage, current-mode (...)
CALCULATION TOOL Download
Positive and Negative Output Voltage Split Rail Calculator for SWIFT DC/DC Converters
SWIFTPOSNEG-CALC The SWIFTPosNeg-CALC Excel sheet is a complementary worksheet to the SLVA369 application note.

This worksheet is used to calculate the external components needed to create a dual output (i.e. positive and negative) power supply using a step-down switching regulator and catalog off the shelf coupled (...)

Reference designs

REFERENCE DESIGNS Download
Non-isolated power architecture with diagnostics reference design for protection relay modules
TIDA-010055 — This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
document-generic Schematic
REFERENCE DESIGNS Download
USB Type-C™ and Power Delivery Minidock With Video and Charging Support Reference Design
TIDA-01243 — The USB Type-C™ and Power Delivery (PD) minidock evaluation module (EVM) provides a complete reference solution for a USB Type-C dock including audio, USB data, power, and video.  The EVM has a small 2 inch by 4 inch  form factor and supports  both source and sink power (...)
document-generic Schematic
REFERENCE DESIGNS Download
Adding an LDO for Increased Standby Mode Efficiency Reference Design
TIDA-00393 This regulation topology is designed to increase the efficiency of a DC/DC buck converter by disabling the converter during light-load operation and providing a regulated output voltage with a low-Iq LDO. During no-load or light-load conditions, the LDO allows for low-noise, low-Iq output voltage (...)
document-generic Schematic
REFERENCE DESIGNS Download
12V input to 3.3@2A output + Isolated 3.3V@150mA
PMP4536 — On a standard 12Vin to 3.3Vout@2A Buck converter, the main inductor has been replaced with a coupled one, thus adding an isolated 3.3V@150mA output. A linear regulator stabilizes the 3.3Vout.
Design files

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options
SOIC (D) 8 View options

Ordering & quality

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  • Ongoing reliability monitoring

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