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TPS54140A

ACTIVE

3.5V to 42V Input, 1.5A Step-Down Converter with Eco-Mode

A newer version of this product is available

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LMR33620 ACTIVE SIMPLE SWITCHER® 3.8V to 36V, 2A Synchronous Buck Converter With Ultra-Low EMI Smaller footprint, higher efficiency, lower IQ and lower EMI.

Product details

Vin (min) (V) 3.5 Vin (max) (V) 42 Vout (min) (V) 0.8 Vout (max) (V) 39 Iout (max) (A) 1.5 Iq (typ) (mA) 0.116 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) 1.5 Iq (typ) (mA) 0.116 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™
  • Tighter Enable Threshold than TPS54140 for
    More Accurate UVLO Voltage
  • Adjustable UVLO Voltage and Hysteresis
  • 116-µA Operating Quiescent Current
  • 1.3-µA Shutdown Current
  • 100-kHz to 2.5-MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start/Sequencing
  • UV and OV Power Good Output
  • 0.8-V Internal Voltage Reference
  • MSOP10 and 3-mm × 3-mm VSON-10 Package
    With PowerPAD™
  • Supported by WEBENCH® and SwitcherPro™
    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™
  • Tighter Enable Threshold than TPS54140 for
    More Accurate UVLO Voltage
  • Adjustable UVLO Voltage and Hysteresis
  • 116-µA Operating Quiescent Current
  • 1.3-µA Shutdown Current
  • 100-kHz to 2.5-MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start/Sequencing
  • UV and OV Power Good Output
  • 0.8-V Internal Voltage Reference
  • MSOP10 and 3-mm × 3-mm VSON-10 Package
    With PowerPAD™
  • Supported by WEBENCH® and SwitcherPro™
    Software Tool

The TPS54140A device is a 42-V, 1.5-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 116 µA. Using the enable pin, shutdown supply current is reduced to 1.3 µA.

Undervoltage lockout is internally set at 2.5 V, but 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/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 external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition.

The TPS54140A device is a 42-V, 1.5-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 116 µA. Using the enable pin, shutdown supply current is reduced to 1.3 µA.

Undervoltage lockout is internally set at 2.5 V, but 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/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 external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition.

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Technical documentation

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Type Title Date
* Data sheet TPS54140A 1.5-A, 42-V Step-Down DC/DC Converter with Eco-mode™ datasheet (Rev. C) PDF | HTML 28 Oct 2015
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 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 Differences between the TPS54x40, TPS54x60 and the TPS54x40A, TPS54x60A 17 Apr 2013
Application note Level Shifting Control for an Inverting Buck-boost 10 Oct 2012

Design & development

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

Evaluation board

TPS54140EVM-429 — TPS54140 42V Input, 3.3V Output, 1.5A Evaluation Module

The TPS54140EVM-429 evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS54140 regulator. The TPS54140 dc/dc converter is designed to provide up to a 1.5 A output from an input voltage source of 3.5 V to 42 V. Rated (...)
User guide: PDF
Not available on TI.com
Simulation model

TPS54140 PSpice Average Model

SLVM545.ZIP (232 KB) - PSpice Model
Simulation model

TPS54140 PSpice Transient Model (Rev. A)

SLIM040A.ZIP (66 KB) - PSpice Model
Simulation model

TPS54140 TINA-TI Average Reference Design

SLVM549.TSC (623 KB) - TINA-TI Reference Design
Simulation model

TPS54140 TINA-TI Average Spice Model

SLVM548.ZIP (7 KB) - TINA-TI Spice Model
Simulation model

TPS54140 TINA-TI Steady State Reference Design

SLIM280.TSC (380 KB) - TINA-TI Reference Design
Simulation model

TPS54140 TINA-TI Transient Spice Model

SLIM279.ZIP (68 KB) - TINA-TI Spice Model
Simulation model

TPS54140 Unencrypted PSpice Average Model

SLVMD09.ZIP (1 KB) - PSpice Model
Simulation model

TPS54140 Unencrypted PSpice Transient Model

SLVMCZ7.ZIP (8 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
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

TIDA-010025 — Three-phase inverter reference design for 200-480 VAC drives with opto-emulated input gate drivers

This reference design realizes a reinforced isolated three-phase inverter subsystem using isolated IGBT gate drivers and isolated current/voltage sensors. The UCC23513 gate driver used has a 6-pin wide body package with optical LED emulated inputs which enables its use as pin-to-pin replacement to (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP8716 — Non-Isolated Buck Using TPS54140A with Input 24 to 30 VDC 5V@1.25A Reference Design

The PMP8716 (5V@1.25A) reference design is a 7W DC/DC Buck which uses a TPS54140A. It can generate a Non-Isolated 5 volt output at 1.25 Amps from an input a 24 to 30 Volts DC. This design has multiple outputs.
Test report: PDF
Package Pins Download
HVSSOP (DGQ) 10 View options
VSON (DRC) 10 View options

Ordering & quality

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

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