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TPS54140A

ACTIVE

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

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Data sheet

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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.

TPS54140A

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1.5 Vin (min) (V) 3.5 Vin (max) (V) 42 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 Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 39 Iq (typ) (µA) 116 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1.5 Vin (min) (V) 3.5 Vin (max) (V) 42 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 Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 39 Iq (typ) (µA) 116 Duty cycle (max) (%) 98
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
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Simulation model

TPS54140 PSpice Transient Model (Rev. A)

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

TPS54140 TINA-TI Average Reference Design

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

TPS54140 TINA-TI Average Spice Model

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

TPS54140 TINA-TI Steady State Reference Design

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

TPS54140 TINA-TI Transient Spice Model

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

TPS54140 Unencrypted PSpice Average Model

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

TPS54140 Unencrypted PSpice Transient Model

SLVMCZ7.ZIP (8 KB) - PSpice Model
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Calculation tool

SLVC432 — TPS54x40 and TPS54x60 Buck Design Spreadsheet

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
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
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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
Package Pins CAD symbols, footprints & 3D models
HVSSOP (DGQ) 10 Ultra Librarian
VSON (DRC) 10 Ultra Librarian
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