TPS40400
3-V to 20-V, 30-A, synchronous buck controller with PMBus™, including Telemetry
TPS40400
- 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.
Technical documentation
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.
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 (...)
FUSION_DIGITAL_POWER_DESIGNER — Digital Power Software
PMBUSSW-LINUX — Linux Driver for PMBUS
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- tps40400
- tps40422
- tps544b20
- tps544b25
- (...)
TPS40400 Unencrypted PSpice Transient Model Package (Rev. A)
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PMP21440 — Comparison: 0.8V/8W GaN vs Silicon Power Supply Reference Design
PMP20084 — 0.9V/10A PMBus POL Power Reference Design
PMP20080 — 12VDC Input, Hybrid Memory Cube (HMC) Gen. 2 Power Supply Reference Design
PMP10520 — Xilinx Virtex® UltraScale™ FPGA Multi-Gigabit Transceiver (MGT) Power Solution
PMP11140 — TPS40400 Step-Down Regulator with PMBus Delivering 1.8V at 4A Reference Design
PMP9475 — Xilinx Virtex UltraScale FPGA Power Solution with PMBus Reference Design
PMP9408 — Xilinx Virtex Ultrascale FPGA Multi-Gigabit Transceiver (MGT) Power Reference Design with PMBus
PMP9407 — Xilinx Virtex Ultrascale FPGA Multi-Gigabit Transceiver (MGT) Power Reference Design with PMBus
PMP9463 — Power Reference Design for Xilinx Ultrascale Kintex FPGA Multi-Gigabit Transciever (MGT) with PMBus
Package | Pins | Download |
---|---|---|
VQFN (RHL) | 24 | View options |
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