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TPS40428

ACTIVE

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

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Data sheet

TPS40428

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, PMBus, 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, PMBus, 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
  • Smart Power Mode in Factory Default (Compatible with TI Smart Power Stage CSD95378B and Pin-for-Pin Equivalent to TPS40425 – Non-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
  • Fast Transient Response
  • Stackable up to Four Phases
    • 2-, 3-, or 4-Phase Interleaved Phase Shifts
    • Accurate Current Sharing
  • PMBus Interface Capability
    • Margining Up/Down with 2-mV Step
    • Programmable Fault Limit and Response
    • ±0.8% VOUT
    • Accuracy Current Monitoring
    • ±3°C External Temperature Monitoring In Smart Power Mode
    • 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
  • 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
  • Smart Power Mode in Factory Default (Compatible with TI Smart Power Stage CSD95378B and Pin-for-Pin Equivalent to TPS40425 – Non-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
  • Fast Transient Response
  • Stackable up to Four Phases
    • 2-, 3-, or 4-Phase Interleaved Phase Shifts
    • Accurate Current Sharing
  • PMBus Interface Capability
    • Margining Up/Down with 2-mV Step
    • Programmable Fault Limit and Response
    • ±0.8% VOUT
    • Accuracy Current Monitoring
    • ±3°C External Temperature Monitoring In Smart Power Mode
    • 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
  • 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

The TPS40428 device is a PMBus, synchronous buck, driverless controller. It operates in smart power mode with factory default settings, and it can operate in non-smart power mode after PMBus programing and power reboot. It can be configured for dual-output or 2-phase operation. 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 TPS40428 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.

For all available packages, see the orderable addendum at the end of the data sheet.

The TPS40428 device is a PMBus, synchronous buck, driverless controller. It operates in smart power mode with factory default settings, and it can operate in non-smart power mode after PMBus programing and power reboot. It can be configured for dual-output or 2-phase operation. 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 TPS40428 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.

For all available packages, see the orderable addendum at the end of the data sheet.
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* Data sheet TPS40428 Dual Output, 2-Phase, Stackable PMBus Synchronous Buck Driverless Controller with Adaptive Voltage Scaling (AVS) Bus datasheet (Rev. A) PDF | HTML 22 Jul 2014
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
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
Analog Design Journal MOSFET power losses and how they affect power-supply efficiency 26 Jan 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

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