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TPS54531

ACTIVE

3.5V to 28V Input, 5A, 570kHz Step-Down Converter with Eco-mode

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Data sheet

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TPS54538 ACTIVE 3.8-V to 28-V, 5-A, 200-kHz to 2.2-MHz, synchronous buck converter Higher efficiency and lower Iq.

TPS54531

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 28 Vin (min) (V) 3.5 Vout (max) (V) 25 Vout (min) (V) 0.8 Features Enable, Light-load efficiency, Soft-start fixed, UVLO adjustable Control mode current mode Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.00011 Duty cycle (max) (%) 90
Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 28 Vin (min) (V) 3.5 Vout (max) (V) 25 Vout (min) (V) 0.8 Features Enable, Light-load efficiency, Soft-start fixed, UVLO adjustable Control mode current mode Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.00011 Duty cycle (max) (%) 90
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • 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 5-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 thermally enhanced 8-pin SO PowerPAD™ integrated circuit package
  • Use TPS56637 for higher efficiency in a smaller package
  • Create a custom design using the TPS54531 with the WEBENCH Power Designer
  • 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 5-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 thermally enhanced 8-pin SO PowerPAD™ integrated circuit package
  • Use TPS56637 for higher efficiency in a smaller package
  • Create a custom design using the TPS54531 with the WEBENCH Power Designer

The TPS54531 device is a 28-V, 5-A non-synchronous buck converter that integrates a low R DS(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 fold back, and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54531 device is available in 8-pin SO PowerPAD integrated circuit package that has been internally optimized to improve thermal performance.

The TPS54531 device is a 28-V, 5-A non-synchronous buck converter that integrates a low R DS(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 fold back, and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54531 device is available in 8-pin SO PowerPAD integrated circuit package that has been internally optimized to improve thermal performance.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS54531 5-A, 28-V Input,SWIFTStep-Down Converter With Eco-mode datasheet (Rev. B) PDF | HTML 10 Oct 2023
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Application note Using TPS54335A to Create an Inverting Power Supply (Rev. A) 19 Jul 2017

Design & development

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

Evaluation board

TPS54531EVM-530 — TPS54531 Step-Down DC/DC Converter Evaluation Module

The TPS54531EVM-530 is a fully assembled and tested circuit for evaluating the TPS54531 synchronous step-down SWIFT™ converter. The EVM converts a 8-V to 28-V input voltage to a regulated 5-V output voltage that delivers up to 5 A and 95.3% efficiency.

User guide: PDF | HTML
Not available on TI.com
Evaluation board

USB-PD-CHG-EVM-01 — Integrated USB Type-C® Power Delivery (PD) and charging reference design for 2-4 cell batteries EVM

The USB-PD-CHG-EVM-01 evaluation module (EVM) is used to evaluate the BQ25798 device and TPS25751 device together. The BQ25798 is an integrated switched-mode buck-boost battery charge management device in HOTROD (QFN) package, intended for 1- to 4-series cell Li-ion and Li-polymer batteries from (...)

Not available on TI.com
Simulation model

TPS54531 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM872A.ZIP (309 KB) - PSpice Model
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Reference designs

TIDA-050047 — Integrated USB Type-C®, USB Power Delivery and charging reference design for 2–4 cell batteries

This reference design features charging up to 20V at 5A without the need for any external FETs, enabling a much smaller solution size and reducing total BOM cost. A microprocessor is also not necessary as the TPS25750 Power Delivery (PD) controller will handle the I2C communication to the BQ25798 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDEP0076 — 3D Machine Vision Reference Design Based on AM572x Processor with DLP® Structured Light

The TIDEP0076 3D machine vision design describes an embedded 3D scanner based on the structured light principle. A digital camera along with a Sitara™ AM57xx processor System on Chip (SoC)  is used to capture reflected light patterns from a DLP4500-based projector. Subsquent processing (...)
Design guide: PDF
Schematic: PDF
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TIDA-010010 — Industrial gigabit Ethernet PHY reference design

PLC applications require high speed gigabit Ethernet interface. This can be realized using our reference design which implements the DP83867IR industrial gigabit Ethernet physical layer transceiver to the gigabit Ethernet MAC peripheral block inside the Sitara™ AM5728 processor.
Design guide: PDF
Schematic: PDF
Reference designs

TIDEP0046 — Monte-Carlo Simulation on AM57x Using OpenCL for DSP Acceleration Reference Design

TI’s high performance ARM® Cortex®-A15 based AM57x processors also integrate C66x DSPs. These DSPs were designed to handle high signal and data processing tasks that are often required by industrial, automotive and financial applications. The AM57x OpenCL implementation makes it easy (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDEP0047 — Power and Thermal Design Considerations Using TI's AM57x Processor Reference Design

This is a reference design based on the AM57x processor and companion TPS659037 power management integrated circuit (PMIC).  This design specifically highlights important power and thermal design considerations and techniques for systems designed with AM57x and TPS659037.  It includes (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP30224 — Industrial Power Supply Reference Design for Smart Amplifiers

The PMP30224 reference design provides 5.0V at 1.0A continuous / 5.0A peak and 1.8V @ 0.075A for a TAS2555 Class D Amplifier. The input voltage range is between 5.0V and 38.0V.
Test report: PDF
Schematic: PDF
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