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TPS40425

ACTIVE

Dual Output, 2-Phase, Stackable PMBUS Synchronous Buck Driverless Controller

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Data sheet

TPS40425

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 4.5 Vin (max) (V) 20 Iout (max) (A) 40 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 5 Features Adjustable current limit, Dynamic Voltage Scaling, Enable, Frequency synchronization, Phase Interleaving, Power good, Pre-Bias Start-Up, Remote Sense, Synchronous Rectification, UVLO adjustable, Voltage Margining Iq (typ) (µA) 18000 Duty cycle (max) (%) 46 Number of phases 2
Vin (min) (V) 4.5 Vin (max) (V) 20 Iout (max) (A) 40 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 5 Features Adjustable current limit, Dynamic Voltage Scaling, Enable, Frequency synchronization, Phase Interleaving, Power good, Pre-Bias Start-Up, Remote Sense, Synchronous Rectification, UVLO adjustable, Voltage Margining Iq (typ) (µA) 18000 Duty cycle (max) (%) 46 Number of phases 2
VQFN (RHA) 40 36 mm² 6 x 6
  • Non-Smart Power Mode in Factory Default
  • Pin-for-Pin Equivalent to TPS40428 – Smart Power Mode in Factory Default
  • Single Supply Operation: 4.5 V to 20 V
  • VOUT from 0.6 V
  • Dual or Multi-Phase Synchronous Buck Controller
  • Individual High-Speed AVS Interface
    (0.5-V to 1.5-V Range)
  • Fast Transient Response
  • Stackable up to Four Phases
    • 2-, 3-, or 4-Phase Interleaved Phase Shifts
    • Accurate Current Sharing
  • PMBus™ Interface Capability
    • Margining Up or Down with 2-mV Step
    • Programmable Fault Limit and Response
    • ±0.8% VOUT
    • Accuracy Current Monitoring
    • ±4.5°C External Temperature Monitoring with x3904
    • Programmable UVLO ON/OFF Thresholds
    • Programmable Soft-Start Time, Turn-On Delay, and Turn-Off Delay
  • On-Chip Non-Volatile Memory (NVM) to Store Custom Configurations
  • 0.6-V Reference Voltage with 0.5% Accuracy from –40°C to 125°C
  • Inductor DCR Current Sensing
  • Programmable ƒSW from 200 kHz to 1.5 MHz
  • Supports Pre-biased Output
  • Differential Remote Sensing
  • Synchronization to an Extermal Clock
  • OC/OV/UV/OT Fault Protection
  • 40-Pin, 6 mm × 6 mm, QFN Package
  • Support for TI Power Stage
  • Non-Smart Power Mode in Factory Default
  • Pin-for-Pin Equivalent to TPS40428 – Smart Power Mode in Factory Default
  • Single Supply Operation: 4.5 V to 20 V
  • VOUT from 0.6 V
  • Dual or Multi-Phase Synchronous Buck Controller
  • Individual High-Speed AVS Interface
    (0.5-V to 1.5-V Range)
  • Fast Transient Response
  • Stackable up to Four Phases
    • 2-, 3-, or 4-Phase Interleaved Phase Shifts
    • Accurate Current Sharing
  • PMBus™ Interface Capability
    • Margining Up or Down with 2-mV Step
    • Programmable Fault Limit and Response
    • ±0.8% VOUT
    • Accuracy Current Monitoring
    • ±4.5°C External Temperature Monitoring with x3904
    • Programmable UVLO ON/OFF Thresholds
    • Programmable Soft-Start Time, Turn-On Delay, and Turn-Off Delay
  • On-Chip Non-Volatile Memory (NVM) to Store Custom Configurations
  • 0.6-V Reference Voltage with 0.5% Accuracy from –40°C to 125°C
  • Inductor DCR Current Sensing
  • Programmable ƒSW from 200 kHz to 1.5 MHz
  • Supports Pre-biased Output
  • Differential Remote Sensing
  • Synchronization to an Extermal Clock
  • OC/OV/UV/OT Fault Protection
  • 40-Pin, 6 mm × 6 mm, QFN Package
  • Support for TI Power Stage

The TPS40425 is a PMBus, synchronous buck, driverless controller. It operates in non-smart power mode in factory default setting, and it can operate in smart power mode after PMBus programming and power reboot. It can be configured as dual-output or 2-phase. It is also stackable up to 4 phases to support load current as high as 120 A. Interleaved phase shift for 2-, 3-, or 4-phases reduce the input and output ripples therefore reducing input and output capacitance.

The wide input voltage range can support 5-V and 12-V intermediate supply buses. The 0.5% reference voltage satisfies the need of precision voltage to the modern ASICs.

Using the PMBus standard, the TPS40425 device can program reference voltage, fault limit, UVLO threshold, soft-start time and turn-on and turn-off delay.

In addition, the device implements an accurate measurement system to monitor the output voltages, currents and temperatures for individual channels.

The TPS40425 is a PMBus, synchronous buck, driverless controller. It operates in non-smart power mode in factory default setting, and it can operate in smart power mode after PMBus programming and power reboot. It can be configured as dual-output or 2-phase. It is also stackable up to 4 phases to support load current as high as 120 A. Interleaved phase shift for 2-, 3-, or 4-phases reduce the input and output ripples therefore reducing input and output capacitance.

The wide input voltage range can support 5-V and 12-V intermediate supply buses. The 0.5% reference voltage satisfies the need of precision voltage to the modern ASICs.

Using the PMBus standard, the TPS40425 device can program reference voltage, fault limit, UVLO threshold, soft-start time and turn-on and turn-off delay.

In addition, the device implements an accurate measurement system to monitor the output voltages, currents and temperatures for individual channels.
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Technical documentation

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Type Title Date
* Data sheet TPS40425 Dual Output, 2-Phase, Stackable PMBus™ Synchronous Buck Driverless Controller with Adaptive Voltage Scaling (AVS) Bus datasheet (Rev. C) PDF | HTML 01 Oct 2018
Application note Multiphase Buck Design from Start to Finish, Part 1 (Rev. B) 07 Apr 2021
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 PDF | HTML 03 Aug 2015
EVM User's guide Using the PWR594 EVM Dual Output DC/DC Analog with PMBus Interface 30 Jul 2014

Design & development

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

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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Simulation model

TPS40425 PSpice Transient Model

SLUM430.ZIP (216 KB) - PSpice Model
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Package Pins CAD symbols, footprints & 3D models
VQFN (RHA) 40 Ultra Librarian
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