TPS54531

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3.5V to 28V Input, 5A, 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) 5 Iq (Typ) (uA) 110 Switching frequency (Min) (kHz) 570 Switching frequency (Max) (kHz) 570 Features Enable, Light Load Efficiency, UVLO Adjustable, Soft Start Fixed Operating temperature range (C) -40 to 85 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 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 5-A Continuous Output
    Current
  • High Efficiency at Light Loads with a
    Pulse Skipping Eco-mode™
  • Fixed 570kHz Switching Frequency
  • Typical 1µA Shutdown Quiescen
    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™ Package
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Description

The TPS54531 device is a 28-V, 5-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 under-voltage 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™ package that has been internally optimized to improve thermal performance.

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Technical documentation

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Type Title Date
* Datasheet TPS54531 5-A, 28-V Input, Step-Down SWIFT™ DC-DC Converter With Eco-mode™ datasheet (Rev. A) Oct. 29, 2014
Selection guide Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note Using TPS54335A to Create an Inverting Power Supply (Rev. A) Jul. 19, 2017
User guide TPS54531EVM-530, 5-A, Regulator Evaluation Module Mar. 05, 2013

Design & development

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

Hardware development

EVALUATION BOARD Download
25
Description

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.

Features
  • 8-V to 28-V input voltage range
  • 95.3% efficiency (VIN = 8 V, IO = 0.7 A)
  • High efficiency at light loads with pulse-skipping eco-mode
  • Integrated 80-mΩ high-side MOSFET supports up to 5-A continuous output current

Design tools & simulation

SIMULATION MODEL Download
SLVM872A.ZIP (309 KB) - PSpice 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
  • (...)

Reference designs

参考设计 Download
Integrated USB Type-C® power delivery (PD) and charging reference design for 2-4 cell batteries
TIDA-050047 This reference design features charging up to 20 V at 5 A 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 BQ25792 (...)
document-generic Schematic
参考设计 Download
Industrial gigabit Ethernet PHY reference design
TIDA-010010 — 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.
document-generic Schematic
参考设计 Download
3D Machine Vision Reference Design Based on AM572x Processor with DLP® Structured Light
TIDEP0076 — 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 of (...)
document-generic Schematic
参考设计 Download
Monte-Carlo Simulation on AM57x Using OpenCL for DSP Acceleration Reference Design
TIDEP0046 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 (...)
document-generic Schematic
参考设计 Download
Power and Thermal Design Considerations Using TI's AM57x Processor Reference Design
TIDEP0047 This TI Design (TIDEP0047) is a reference platform based on the AM57x processor and companion TPS659037 power management integrated circuit (PMIC).  This TI Design specifically highlights important power and thermal design considerations and techniques for systems designed with AM57x and (...)
document-generic Schematic
参考设计 Download
Industrial Power Supply Reference Design for Smart Amplifiers
PMP30224 — 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.
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

Information included:
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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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