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TPS40400

ACTIVE

3-V to 20-V, 30-A, synchronous buck controller with PMBus™, including Telemetry

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Data sheet

A newer version of this product is available

Drop-in replacement with upgraded functionality to the compared device.
TPS546D24A ACTIVE 2.95-V to 16-V, stackable 40-A synchronous SWIFT™ buck converter with pin-strapping and PMBus

TPS40400

ACTIVE
Data sheet Order now

Product details

Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 0.6 Vout (Max) (V) 5 Iout (Max) (A) 30 Iq (Typ) (uA) 6000 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 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 0.6 Vout (Max) (V) 5 Iout (Max) (A) 30 Iq (Typ) (uA) 6000 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 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
VQFN (RHL) 24 19 mm² 5.5 x 3.5
  • 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
  • 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

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.

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

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Type Title Date
* Data sheet TPS40400 3-V to 20-V PMBus Synchronous Buck Controller datasheet (Rev. D) PDF | HTML 07 Nov 2016
User guide TPS40400 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 03 Jan 2022
Analog Design Journal Maximizing power density and thermal performance in power-module designs 12 Dec 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Selection guide DC/DC Buck Controller Solutions Selection Guide 06 Feb 2018
Application note SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC 22 Feb 2016
Technical article Select the correct PMBus POL solution for your application 03 Aug 2015
Technical article Power Tips: How to Remote Sense your Power Supply 16 Aug 2014
Technical article Nailing accurate and lossless current sensing in high-current converters 16 Nov 2013
Analog Design Journal 2Q 2012 Issue Analog Applications Journal 26 Apr 2012
Analog Design Journal Remote sensing for power supplies 26 Apr 2012

Design & development

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

Evaluation board

TPS40400EVM-351 — Evaluation Module for TPS40400 PMBus Synchronous Buck Controller

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 (...)

User guide: PDF | HTML
Not available on TI.com
Application software & framework

FUSION_DIGITAL_POWER_DESIGNER — Digital Power Software

Fusion Digital Power™ graphical user interface (GUI) software is 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.
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Driver or library

PMBUSSW-LINUX — Linux Driver for PMBUS

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
  • (...)
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Simulation model

TPS40400 IBIS MODEL

SLVMAY8.ZIP (81 KB) - IBIS Model
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Simulation model

TPS40400 Unencrypted PSpice Transient Model Package (Rev. A)

SLUM560A.ZIP (221 KB) - PSpice Model
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Calculation tool

Type III Compensation Calculation Tool (Rev. E)

SLUC263E.ZIP (185 KB)
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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 (...)
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Reference designs

PMP21440 — Comparison: 0.8V/8W GaN vs Silicon Power Supply Reference Design

This reference design provides customers with a comparison study on the usage of GaN vs SI in power supply designs. This specific design uses TPS40400 controller to drive CSD87381 for the silicon power supply and LMG1210 with EPC2111 for the GaN power supply to provide 0.8V/10A. This design (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP20084 — 0.9V/10A PMBus POL Power Reference Design

This reference design is a 3.3Vin to 0.9V @ 10A power supply in a small form-factor, cost-effective design. It uses the TPS40400 controller in conjunction with the CSD87381P (a high and low side FET IC). The TPS40400 features full PMBUS telemetry for enhanced monitoring and control. The (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP20080 — 12VDC Input, Hybrid Memory Cube (HMC) Gen. 2 Power Supply Reference Design

The PMP20080 is a powerful design intended to operate 5 output rails with application to a Hybrid Memory Cube (HMC) Gen2. This design uses 5 synchronous bucks with multiple different controllers to allow for a well regulated set of outputs. Also, PMP20080 allows for the configurability that comes (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP10520 — Xilinx Virtex® UltraScale™ FPGA Multi-Gigabit Transceiver (MGT) Power Solution

The PMP10520 reference design provides all the power supply rails (1V/20A, 1.2V/30A, 1.8V/4A) necessary to power the multi-gigabit transcievers (MGT) in Xilinx's Virtex® Ultrascale™  FPGAs.  This design uses a 5V input and has a PMBus interface for current and voltage (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP11140 — TPS40400 Step-Down Regulator with PMBus Delivering 1.8V at 4A Reference Design

PMP11140 is a single-phase switching regulator accepting an input range of 4.5V to 13.2V and providing an output voltage of 1.8V capable of supplying 4A of current. This reference design shows 1.8Vout, 4A (3A without a fan) for CPU I/O and other applications in a 22cm by 12.6cm single sided (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP9475 — Xilinx Virtex UltraScale FPGA Power Solution with PMBus Reference Design

The PMP9475 12V-input reference design provides all the power supply rails necessary to power Xilinx's Virtex® UltraScale™ family of FPGAs in  a compact, highly efficient design.  This design uses several of TI's PMBus Point-Of-Load voltage regulators for ease of (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP9408 — Xilinx Virtex Ultrascale FPGA Multi-Gigabit Transceiver (MGT) Power Reference Design with PMBus

The PMP9408 reference design provides all the power supply rails necessary to power the multi-gigabit transcievers (MGT) in Xilinx's Virtex® Ultrascale™ FPGAs.  It utilizes a PMBus interface for current and voltage monitoring and meets Xilinx's low output voltage ripple (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP9407 — Xilinx Virtex Ultrascale FPGA Multi-Gigabit Transceiver (MGT) Power Reference Design with PMBus

The PMP9407 reference design provides all the power supply rails necessary to power the multi-gigabit transcievers (MGT) in Xilinx's Virtex® Ultrascale™ FPGAs.  This design uses a 5V input and has a PMBus interface for current and voltage monitoring, margining, timing delays, and (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP9463 — Power Reference Design for Xilinx Ultrascale Kintex FPGA Multi-Gigabit Transciever (MGT) with PMBus

The PMP9463 reference design provides all the power supply rails necessary to power the multi-gigabit transcievers (MGT) in Xilinx's Ultrascale™ Kintex® FPGAs.  It utilizes a PMBus interface for current and voltage monitoring and meets Xilinx's low output voltage ripple (...)
Test report: PDF
Schematic: PDF
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VQFN (RHL) 24 View options

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