Home Power management DC/DC switching regulators Step-down (buck) regulators Buck converters (integrated switch)

TPS54240

ACTIVE

3.5V to 42V Input, 2.5A Step-Down Converter with Eco-Mode

A newer version of this product is available

open-in-new Compare alternates
Same functionality with different pin-out to the compared device
LMR36520 ACTIVE SIMPLE SWITCHER® 4.2-V to 65-V, 2-A synchronous step-down converter with 26-uA IQ Higher input voltage rating, easy to use SO-8 package and an FPWM option.

Product details

Vin (min) (V) 3.5 Vin (max) (V) 42 Vout (min) (V) 0.8 Vout (max) (V) 39 Iout (max) (A) 2.5 Iq (typ) (mA) 0.138 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2500 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
Vin (min) (V) 3.5 Vin (max) (V) 42 Vout (min) (V) 0.8 Vout (max) (V) 39 Iout (max) (A) 2.5 Iq (typ) (mA) 0.138 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2500 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
HVSSOP (DGQ) 10 14.7 mm² 3 x 4.9 VSON (DRC) 10 9 mm² 3 x 3
  • 3.5-V to 42-V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High Efficiency at Light Loads With a
    Pulse Skipping Eco-Mode™
  • 138-µA Operating Quiescent Current
  • 1.3-µA Shutdown Current
  • 100-kHz to 2.5-MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start and Sequencing
  • UV and OV Power Good Output
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V Internal Voltage Reference
  • 10-Pin HVSSOP and 10-Pin 3-mm x 3-mm
    VSON Packages with PowerPAD™
  • Supported by WEBENCH® Software Tool
  • 3.5-V to 42-V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High Efficiency at Light Loads With a
    Pulse Skipping Eco-Mode™
  • 138-µA Operating Quiescent Current
  • 1.3-µA Shutdown Current
  • 100-kHz to 2.5-MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start and Sequencing
  • UV and OV Power Good Output
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V Internal Voltage Reference
  • 10-Pin HVSSOP and 10-Pin 3-mm x 3-mm
    VSON Packages with PowerPAD™
  • Supported by WEBENCH® Software Tool

The TPS54240 device is a 42-V, 2.5-A, step-down regulator with an integrated high-side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low-ripple, pulse skip mode reduces the no load, regulated output supply current to 138 µA. Using the enable pin, shutdown supply current is reduced to 1.3 µA, when the enable pin is low.

Undervoltage lockout is internally set at 2.5 V, but it can be increased using the enable pin. The output voltage startup ramp is controlled by the slow-start pin that can also be configured for sequencing and tracking. An open-drain power good signal indicates the output is within 94% to 107% of its nominal voltage.

A wide switching frequency range allows efficiency and optimization of external component size. Frequency foldback and thermal shutdown protects the part during an overload condition.

The TPS54240 is available in 10-pin, thermally-enhanced HVSSOP and 10-pin 3-mm × 3-mm PowerPAD package.

The TPS54240 device is a 42-V, 2.5-A, step-down regulator with an integrated high-side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low-ripple, pulse skip mode reduces the no load, regulated output supply current to 138 µA. Using the enable pin, shutdown supply current is reduced to 1.3 µA, when the enable pin is low.

Undervoltage lockout is internally set at 2.5 V, but it can be increased using the enable pin. The output voltage startup ramp is controlled by the slow-start pin that can also be configured for sequencing and tracking. An open-drain power good signal indicates the output is within 94% to 107% of its nominal voltage.

A wide switching frequency range allows efficiency and optimization of external component size. Frequency foldback and thermal shutdown protects the part during an overload condition.

The TPS54240 is available in 10-pin, thermally-enhanced HVSSOP and 10-pin 3-mm × 3-mm PowerPAD package.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Same functionality with different pin-out to the compared device
LMR33630 ACTIVE SIMPLE SWITCHER® 3.8V to 36V, 3A Synchronous Buck Converter With Ultra-Low EMI Next-generation 36-V 3-A converter.
LMR51420 ACTIVE SIMPLE SWITCHER® power converter 4.5-V to 36-V, 2-A, synchronous buck with 40-µA IQ Lower Vin voltage, synchronous solution, SOT23-6 package for personal electronics and industrial applications

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 11
Type Title Date
* Data sheet TPS54240 3.5-V to 42-V Step-Down DC - DC Converter With Eco-Mode™ datasheet (Rev. B) PDF | HTML 24 Nov 2014
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
EVM User's guide TPS54240EVM-VSON Regulator Evaluation Module 26 Feb 2018
Application note Understanding Eco-mode(TM) Operation 05 Dec 2016
Application note Design Considerations for DC-DC Converters in Fast-Input Slew Rate Applications 05 Mar 2015
Application note Methods to Improve Low Dropout Operation with the TPS54240 and TPS54260 (Rev. A) 06 Nov 2013
Application note Creating a Universal Car Charger for USB Devices From the TPS54240 and TPS2511 (Rev. E) 16 Sep 2013
Technical article Power Tips: how to build a car charger 03 Sep 2013
Application note Level Shifting Control for an Inverting Buck-boost 10 Oct 2012
EVM User's guide TPS54240EVM-605 2.5-A, SWIFT™ Regulator Evaluation Module 09 Mar 2010

Design & development

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

Evaluation board

TPS54240EVM-605 — 2.5A SWIFT™ Converter Evaluation Module

The TPS54240 dc/dc converter is designed to provide up to a 2.5-A output from an input voltage source of 3.5V to 40V. Rated input voltage and output current range for the evaluation module are given in Table 1 of the User Guide. This evaluation module is designed to demonstrate the small, (...)
User guide: PDF
Not available on TI.com
Evaluation board

TPS54240EVM-VSON — Step-down converter evaluation module

TPS54240EVM-VSON is a step-down converter evaluation module (EVM).  The TPS54240 is a buck converter with Eco-mode control which can provide high efficiency at light loads. It has a wide switching-frequency range allows efficiency and external component size to be optimized.
User guide: PDF
Not available on TI.com
Simulation model

TPS54240 PSpice Transient Model (Rev. A)

SLIM265A.ZIP (53 KB) - PSpice Model
Simulation model

TPS54240 TINA-TI Transient Reference Design

SLVM271.TSC (160 KB) - TINA-TI Reference Design
Simulation model

TPS54240 TINA-TI Transient Spice Model

SLVM272.ZIP (51 KB) - TINA-TI Spice Model
Simulation model

TPS54240 Unencrypted PSpice Transient Model

SLVMD00.ZIP (7 KB) - PSpice Model
Calculation tool

SLVC432 TPS54x40 and TPS54x60 Buck Design Spreadsheet

Supported products & hardware

Supported products & hardware

Products
Buck converters (integrated switch)
TPS54040 3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode TPS54040A 3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode TPS54060 3.5V to 60V Input, 0.5A Step-Down Converter with Eco-Mode TPS54060-EP TPS54060-EP- 0.5-A, 60V Step Down DC/DC Converter with Eco-Mode TPS54060A 3.5V to 60V Input, 0.5A Step-Down Converter with Eco-Mode TPS54140 3.5V to 42V Input, 1.5A Step-Down Converter with Eco-Mode TPS54140A 3.5V to 42V Input, 1.5A Step-Down Converter with Eco-Mode TPS54160 3.5V to 60V Input, 1.5A Step-Down Converter with Eco-Mode TPS54160A 3.5V to 60V Input, 1.5A Step-Down Converter with Eco-Mode TPS54240 3.5V to 42V Input, 2.5A Step-Down Converter with Eco-Mode TPS54260 3.5V to 60V Input, 2.5A Step-Down Converter with Eco-Mode
Calculation tool

SWIFTPOSNEG-CALC TPS54160 Pos/Neg Calculation Utility Download

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 (...)

Supported products & hardware

Supported products & hardware

Products
Buck converters (integrated switch)
TPS54040 3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode TPS54060 3.5V to 60V Input, 0.5A Step-Down Converter with Eco-Mode TPS54060-EP TPS54060-EP- 0.5-A, 60V Step Down DC/DC Converter with Eco-Mode TPS54140 3.5V to 42V Input, 1.5A Step-Down Converter with Eco-Mode TPS54160 3.5V to 60V Input, 1.5A Step-Down Converter with Eco-Mode TPS54231 3.5 to 28V Input, 2A, 570kHz Step-Down Converter with Eco-mode™ TPS54232 3.5-V to 28-V input, 2-A step-down converter with eco-mode TPS54233 3.5 to 28V Input, 2A, 300kHz Step-Down Converter with Eco-mode TPS54240 3.5V to 42V Input, 2.5A Step-Down Converter with Eco-Mode TPS54260 3.5V to 60V Input, 2.5A Step-Down Converter with Eco-Mode TPS54331 3.5V to 28V Input, 3A, 570kHz Step-Down Converter with Eco-mode TPS54332 3.5V to 28V Input, 3.5A, 1MHz Step-Down Converter with Eco-mode
Download options
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 (...)
Reference designs

PMP7371 — 12Vdc Input, 2.1A USB Charger for Smart Phones and Tablets Reference Design

This reference design takes a 12Vdc input (20V max) and generates a 5V/2.1A output for charging smart phone and tablets. The TPS54240 provides a cost effective yet efficient solution for the DC/DC conversion. The TPS2561A provides a precision current limit to protect the device being charged during (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP8537 — 3.8V @ 2.5A Buck Converter

This design is a buck converter for automotive as well as for non-automotive applications. It delivers an output voltage of 3.8V @ 2.5A at an input voltage range of 9-14V. It can withstand input peaks up to 40V.
Test report: PDF
Reference designs

PMP7388 — 9-40V Automotive Input, 5V@2.1A Smart USB Charger Reference Design

This reference design is a complete automotive USB charger solution from the car battery.
From a 9V to 40V DC input,  this design generates a 5V/2.1A output for smart phones and tablets.
Test report: PDF
Schematic: PDF
Package Pins Download
HVSSOP (DGQ) 10 View options
VSON (DRC) 10 View options

Ordering & quality

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

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos