TPS54040

ACTIVE

3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode

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Product details

Parameters

Vin (Min) (V) 3.5 Vin (Max) (V) 42 Vout (Min) (V) 0.8 Vout (Max) (V) 39 Iout (Max) (A) 0.5 Iq (Typ) (uA) 116 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 2500 Features Enable, Frequency Synchronization, Light Load Efficiency, Power Good, Tracking, UVLO Adjustable Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HVSSOP (DGQ) 10 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)

Features

  • 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™
  • 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
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V Internal Voltage Reference
  • MSOP10 Package With PowerPAD™
  • Supported by SwitcherPro Software Tool
    (http://focus.ti.com/docs/toolsw/folders/print/switcherpro.html)
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Description

The TPS54040 device is a 42-V, 0.5-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, when the enable pin is low.

Under voltage 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 93% 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 TPS54040 is available in 10-pin thermally enhanced HVSSOP PowerPAD package.

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Technical documentation

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Type Title Date
* Data sheet TPS54040 0.5-A, 42-V Step Down DC/DC Converter with Eco-Mode™ datasheet (Rev. B) Jan. 15, 2016
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note Understanding Eco-mode(TM) Operation Dec. 05, 2016
Application note Design Considerations for DC-DC Converters in Fast-Input Slew Rate Applications Mar. 05, 2015
Application note Differences between the TPS54x40, TPS54x60 and the TPS54x40A, TPS54x60A Apr. 17, 2013
Application note Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) Oct. 26, 2012
Application note Level Shifting Control for an Inverting Buck-boost Oct. 10, 2012
White paper Power Management Solutions for Ultra-Low-Power 16-Bit MSP430 MCUs (Rev. D) Mar. 28, 2012
User guide PMP5691 Test Results Nov. 21, 2011
User guide TPS54040EVM-456 0.5-A, SWIFT™ Regulator Evaluation Module Mar. 20, 2009

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
25
Description
The TPS54040EVM-456 evaluation module is designed to demonstrate the small printed-circuit-board areas that can be achieved when designing with the TPS54040 regulator. The TPS54040 dc/dc converter is designed to provide up to a 0.5-A output from an input voltage source of 3.5 V to 42 V. Rated input (...)

Design tools & simulation

SIMULATION MODEL Download
SLIM069.ZIP (66 KB) - PSpice Model
SIMULATION MODEL Download
SLIM277.ZIP (68 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SLIM278.TSC (482 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLVM913.ZIP (85 KB) - PSpice Model
SIMULATION MODEL Download
SLVMCU4.ZIP (1 KB) - PSpice Model
SIMULATION MODEL Download
SLVMD06.ZIP (7 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
Inverting Power Supply Calculator for SWIFT DC/DC with Integrated FETs
SWIFTINV-CALC The SWIFTINV-CALC Excel sheet is a complementary worksheet to the SLVA317 application note. The worksheet is used to calculate the external components needed to create a negative output voltage from a positive input voltage. The tool features several families of wide input voltage, current-mode (...)
CALCULATION TOOL Download
Positive and Negative Output Voltage Split Rail Calculator for SWIFT DC/DC Converters
SWIFTPOSNEG-CALC 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 (...)

CALCULATION TOOL Download
SLVC432A.ZIP (49 KB)

Reference designs

REFERENCE DESIGNS Download
Sync Buck(x4), Buck (1V @ 25A)
PMP6000 — PMP6000 uses the UC9224 Digital Power controller with 2 outputs with up to 2 phases per output to drive the CSD96370Q5M synchronous buck power stages. It targets 12Vin applications with 2 outputs, each about 1 to 1.2V at up to 50A if both phases are populated. For each phase the INA213 current (...)
Design files
REFERENCE DESIGNS Download
Boost Power Supply for Automotive eCall System
PMP7220 — This design is a buck converter for automotive as well as for non-automotive applications. It delivers an output voltage of 5.0V @ 70mA at an input voltage range of 9-14V. It can withstand input peaks up to 40V.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
3-ph E-Meter. Input voltage: 2 and 3 phase; outputs: 16.5V@300mApk, 12V@500mA, 3.3V@100mApk, 1.9V@15
PMP7146 — The PMP7146 has been designed especially for E-meters with PLC (power line communication) on board. The input filter shows high impedance to the PLC transmitter and the controller LM5021 works in constant switching frequency. A settable skip-mode improves the efficiency at light load. Two Bucks and (...)
Design files
REFERENCE DESIGNS Download
Buck for wireless charging (5V @ 100mA)
PMP5185 — PMP5185 is a 5V 100mA converter off a wide input range with a focus on efficiency down to 5mA loading. With the TPS54040, a 220uHy choke and a 100kHz operating frequency; a near 70% efficiency was achieved at 5mA rising to 90% at and near full load. We have newer parts with light load variable (...)
Design files
REFERENCE DESIGNS Download
3.3V @ 0.3A Buck Converter
PMP8538 — This design is a buck converter for automotive as well as for non-automotive applications. It delivers an output voltage of 3.3V @ 0.3A at an input voltage range of 9-14V. It can withstand input peaks up to 40V.
REFERENCE DESIGNS Download
Inverting buck-boost using TPS54040 to generate -5V@100mA
PMP5691 — Low power inverting buck boost to convert +5V to -5V
Design files
REFERENCE DESIGNS Download
TPS54160 Universal Board
PMP4743 — low power inverting buck boost to generate negative output voltage -5.5V out of positive input voltage 15V
Design files
REFERENCE DESIGNS Download

CAD/CAE symbols

Package Pins Download
HVSSOP (DGQ) 10 View options

Ordering & quality

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