TPS54540 is not recommended for new designs.
This product continues to be in production to support existing customers. Please consider one of these alternatives:
Exact equivalent in functionality and parametrics to the compared device:
TPS54540B ACTIVE 4.5-V to 42-V input, 5-A step-down converter with Eco-mode™ Pin-compatible with the TPS543540.
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Product details

Parameters

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Features

  • High Efficiency at Light Loads with Pulse Skipping Eco-mode™
  • 92-mΩ High-Side MOSFET
  • 146 µA Operating Quiescent Current and
    2 µA Shutdown Current
  • 100 kHz to 2.5 MHz Fixed Switching Frequency
  • Synchronizes to External Clock
  • Low Dropout at Light Loads with Integrated BOOT Recharge FET
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8 V 1% Internal Voltage Reference
  • 8-Terminal HSOP with PowerPAD™ Package
  • –40°C to 150°C TJ Operating Range
  • Create a Custom Design using the TPS54540 with the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

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Description

The TPS54540 is a 42 V, 5 A, step down regulator with an integrated high side MOSFET. The device survives load dump pulses up to 45V per ISO 7637. Current mode control provides simple external compensation and flexible component selection. A low ripple pulse skip mode reduces the no load supply current to 146 µA. Shutdown supply current is reduced to 2 µA when the enable pin is pulled low.

Undervoltage lockout is internally set at 4.3 V but can be increased using the enable pin. The output voltage start up ramp is internally controlled to provide a controlled start up and eliminate overshoot.

A wide switching frequency range allows either efficiency or external component size to be optimized. Output current is limited cycle-by-cycle. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.

The TPS54540 is available in an 8-terminal thermally enhanced HSOP PowerPAD™ package.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet TPS54540 4.5-V to 42-V Input, 5 A, Step Down DC-DC Converter with Eco-mode™ datasheet (Rev. B) Mar. 20, 2016
Application note NRND & Differences TPS54340/360/540/560 and TPS54340B/360B/540B/560B Apr. 05, 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 Creating a Universal Car Charger for USB Devices From the TPS54240 and TPS2511 (Rev. E) Sep. 16, 2013
User guide Evaluation Module for the TPS54540 Step-Down Converter Feb. 01, 2013
Application note Create a Split-Rail Power Supply with a Wide Input Voltage Buck Regulator (Rev. A) Oct. 26, 2012
Application note Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) Oct. 26, 2012

Design & development

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

Hardware development

EVALUATION BOARD Download
49
Description
The Texas Instruments TPS54540EVM-558 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS54540 Step-Down Converter. The EVM operates from an 6V to 42V input (12V nominal) and provides a 3.3V output at 5A.
Features
  • 4.5 V to 42 V Input Supply Voltage
  • Integrated 90-mΩ High Side N-Channel MOSFET
  • 146 µA Operating Quiescent Current
  • 2 µA Shutdown Current
  • 100 kHz to 2.5 MHz Switching Frequency
  • Adjustable UVLO Voltage and Hysteresis

Design tools & simulation

SIMULATION MODEL Download
SLVM871A.ZIP (125 KB) - PSpice Model
SIMULATION MODEL Download
SLVMA28A.ZIP (205 KB) - PSpice Model
SIMULATION MODEL Download
SLVMCT8.ZIP (6 KB) - PSpice Model
SIMULATION MODEL Download
SLVMCT9.ZIP (1 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
  • (...)
CALCULATION TOOL Download
SLVC211E.ZIP (522 KB)
CALCULATION TOOL Download
SLVC452E.ZIP (245 KB)

Reference designs

REFERENCE DESIGNS 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
REFERENCE DESIGNS Download
Wide input voltage buck converter solution optimized for large load steps
PMP8726 This design is a non-synchronous buck converter with an input voltage range of 16 to 42V providing 14V output at 5A. It is optimized for large load steps. The IC has a Q-grade option for automotive applications.
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
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  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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