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TPS54540B ACTIVE 4.5-V to 42-V input, 5-A step-down converter with Eco-mode™ Pin-compatible with the TPS543540.

Product details

Vin (Min) (V) 4.5 Vin (Max) (V) 42 Vout (Min) (V) 0.8 Vout (Max) (V) 41.1 Iout (Max) (A) 5 Iq (Typ) (uA) 146 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 2500 Features Enable, Frequency Synchronization, Light Load Efficiency, Over Current Protection, UVLO Adjustable Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 4.5 Vin (Max) (V) 42 Vout (Min) (V) 0.8 Vout (Max) (V) 41.1 Iout (Max) (A) 5 Iq (Typ) (uA) 146 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 2500 Features Enable, Frequency Synchronization, Light Load Efficiency, Over Current Protection, UVLO Adjustable Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
HSOIC (DDA) 8 19 mm² 4.9 x 3.9
  • 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
  • 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

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.

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

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Type Title Date
* Data sheet TPS54540 4.5-V to 42-V Input, 5 A, Step Down DC-DC Converter with Eco-mode™ datasheet (Rev. B) 20 Mar 2016
Application note NRND & Differences TPS54340/360/540/560 and TPS54340B/360B/540B/560B 05 Apr 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Creating a Universal Car Charger for USB Devices From the TPS54240 and TPS2511 (Rev. E) 16 Sep 2013
User guide Evaluation Module for the TPS54540 Step-Down Converter 01 Feb 2013
Application note Create a Split-Rail Power Supply with a Wide Input Voltage Buck Regulator (Rev. A) 26 Oct 2012
Application note Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) 26 Oct 2012

Design & development

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

Evaluation board

TPS54540EVM-558 — TPS54540 Step-Down DC-DC Converter Evaluation Module

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.
In stock
Limit: 5
Simulation model

TPS54540 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM871A.ZIP (125 KB) - PSpice Model
Simulation model

TPS54540 Unencrypted PSpice Average Model Package (Rev. A)

SLVMA28A.ZIP (205 KB) - PSpice Model
Simulation model

TPS54540 Unencrypted PSpice Transient Model

SLVMCT8.ZIP (6 KB) - PSpice Model
Simulation model

TPS54540 Unencrypted PSpice Average Model

SLVMCT9.ZIP (1 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Calculation tool

TPS54360 and TPS54361 Family Design Excel Tool (Rev. E)

SLVC452E.ZIP (245 KB)
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.
Reference designs

PMP8726 — Wide input voltage buck converter solution optimized for large load steps

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.
Package Pins Download
SO PowerPAD (DDA) 8 View options

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