TPS40400

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3.0V - 20V, 30A, Synchronous Buck Controller with PMBus™, including Telemetry

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Product details

Parameters

Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 0.6 Vout (Max) (V) 5 Iout (Max) (A) 30 Iq (Typ) (mA) 6 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2000 Features Dynamic Voltage Scaling, Enable, Frequency Synchronization, PMBus, Power Good, Pre-Bias Start-Up, Remote Sense, Synchronous Rectification, Tracking Operating temperature range (C) -40 to 125 Regulated outputs (#) 1 Number of Phases 1 Rating Catalog open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

VQFN (RHL) 24 19 mm² 5.5 x 3.5 open-in-new Find other Buck controllers (external switch)

Features

  • Input Operating Voltage Range: 3 V to 20 V
  • PMBus Enabled Analog Controller
  • Reference 600 mV ± 1%
  • Remote Voltage Sense Amplifier
  • Internal 6-V Regulator and 6-V Gate Drive
  • Programmable Overcurrent Protection
  • Inductor Resistance or Series Resistance Used for Current Sensing
  • Programmable Switching Frequency: 200 kHz to 2 MHz
  • Powergood Indicator
  • Thermal Shutdown
  • Programmable Soft-Start
  • Internal Bootstrap Diode
  • Prebias Output Safe
  • 24-Pin QFN Package
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Description

The TPS40400 is a cost-optimized flexible synchronous buck controller that operates from a nominal 3-V to 20-V supply. This controller is an analog PWM controller that allows programming and monitoring through the PMBus™ interface. Flexible features found on this device include programmable soft-start time, programmable short circuit limit, and programmable undervoltage lockout (UVLO).

An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Gate drive voltage is 6 V to better enhance the power FETs for reduced losses. Short circuit detection occurs by sensing the voltage drop across the inductor or across a resistor placed in series with the inductor. A PMBus programmable threshold is compared to this voltage and is used to detect overcurrent. When the overcurrent threshold is reached, a pulse by pulse current limit scheme is used to limit the current to acceptable levels. If the overcurrent condition persists for more than 7 clock cycles of the converter, a fault condition is declared and the converter shuts down and goes into either a hiccup restart mode or latches off. The behavior can be selected through the PMBus interface. Other PMBus interface features include programmable operating frequency, soft-start time, overvoltage and undervoltage thresholds and the response to those events, output voltage change including margining as well as status monitoring.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TPS40400 3-V to 20-V PMBus Synchronous Buck Controller datasheet (Rev. D) Nov. 07, 2016
Application notes Maximizing power density and thermal performance in power-module designs Dec. 12, 2018
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Selection guides DC/DC Buck Controller Solutions Selection Guide Feb. 06, 2018
Application notes SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC Feb. 22, 2016
Technical articles Select the correct PMBus POL solution for your application Aug. 03, 2015
Technical articles Power Tips: How to Remote Sense your Power Supply Aug. 16, 2014
Technical articles Nailing accurate and lossless current sensing in high-current converters Nov. 16, 2013
Application notes 2Q 2012 Issue Analog Applications Journal Apr. 26, 2012
Application notes Remote sensing for power supplies Apr. 26, 2012
User guides Using the TPS40400EVM-351 Aug. 10, 2011

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
49
Description

The TPS40400EVM-351 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS40400 PMBus Synchronous Buck Controller in a typical single output application. The EVM is designed to use a regulated 8Vdc to 14Vdc bus to produce a regulated output of 1.2Vdc at a maximum of (...)

Features
  • 8V to 14V input range
  • 1.2V fixed output
  • 20A DC steady state current
  • PMBus enabled analog controller
  • Programmable switching frequency: 200kHz–2MHz
  • Programmable soft-start
  • Programmable over current protection
  • Inductor resistance or series resistance use for current sensing
  • Remote voltage sense amplifier
  • Voltage (...)

Software development

APPLICATION SOFTWARE & FRAMEWORKS Download
Digital Power Software
FUSION_DIGITAL_POWER_DESIGNER Fusion Digital Power™  is the Graphical User Interface (GUI) used to configure and monitor select Texas Instruments digital power controllers and sequencer/health monitors. The application uses the PMBus protocol to communicate with the device over serial bus by way of a TI USB adapter.
Features

Some of the tasks you can perform with the GUI include:

  • Turn on or off the power supply output, either through the hardware control line or the PMBus OPERATION command
  • Monitor real-time data. Items such as input voltage, output voltage, output current, temperature, and warnings/faults are continuously (...)
DRIVERS & LIBRARIES Download
Linux Driver for PMBUS
PMBUSSW-LINUX The Linux driver supports PMBus controlled Buck Controllers. The Linux driver supports communication through the PMBus and interfaces with the HWMon framework.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

  • tps40400
  • tps40422
  • tps544b20
  • tps544b25
  • (...)

Design tools & simulation

SIMULATION MODELS Download
SLUM560A.ZIP (221 KB) - PSpice Model
SIMULATION MODELS Download
SLVMAY8.ZIP (81 KB) - IBIS Model
SIMULATION TOOLS 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 TOOLS Download
SLUC263D.ZIP (131 KB)

Reference designs

Many TI reference designs include the TPS40400 Use our reference design selection tool to review and identify designs that best match your application and parameters.

CAD/CAE symbols

Package Pins Download
VQFN (RHL) 24 View options

Ordering & quality

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