3-V to 20-V, 30-A, synchronous buck controller with PMBus™, including Telemetry
Product details
Parameters
Package | Pins | Size
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
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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TPS40400 3-V to 20-V PMBus Synchronous Buck Controller datasheet (Rev. D) | Nov. 07, 2016 |
Application note | Maximizing power density and thermal performance in power-module designs | Dec. 12, 2018 | |
Selection guide | Power Management Guide 2018 (Rev. R) | Jun. 25, 2018 | |
Selection guide | DC/DC Buck Controller Solutions Selection Guide | Feb. 06, 2018 | |
Application note | SMT Guidelines for Stacked Inductor (Inductor On Top) on Voltage Regulator IC | Feb. 22, 2016 | |
Technical article | Select the correct PMBus POL solution for your application | Aug. 03, 2015 | |
Technical article | Power Tips: How to Remote Sense your Power Supply | Aug. 16, 2014 | |
Technical article | Nailing accurate and lossless current sensing in high-current converters | Nov. 16, 2013 | |
Application note | 2Q 2012 Issue Analog Applications Journal | Apr. 26, 2012 | |
Application note | Remote sensing for power supplies | Apr. 26, 2012 | |
User guide | 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
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: 200kHzâ2MHz
- Programmable soft-start
- Programmable over current protection
- Inductor resistance or series resistance use for current sensing
- Remote voltage sense amplifier
- Voltage (...)
Software development
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 (...)
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
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
- (...)
Reference designs
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VQFN (RHL) | 24 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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