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


Package | PIN: RHA | 40
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $6.09
10-24 $5.66
25-99 $5.46
100-249 $4.77
250-499 $4.54
500-749 $4.18
750-999 $3.75
1000+ $3.74


  • 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-PhaseInterleaved Phase Shifts
    • Accurate CurrentSharing
  • PMBus™ Interface Capability
    • Margining Up orDown with 2-mV Step
    • Programmable Fault Limit andResponse
    • ±0.8% VOUT
    • Accuracy CurrentMonitoring
    • ±4.5°C External Temperature Monitoring withx3904
    • Programmable UVLO ON/OFF Thresholds
    • ProgrammableSoft-Start Time, Turn-On Delay, and Turn-OffDelay
  • 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

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Texas Instruments  TPS40425RHAT

The TPS40425 is a PMBus, synchronous buck, driverless controller. It operates innon-smart power mode in factory default setting, and it can operate in smart power mode after PMBusprogramming and power reboot. It can be configured as dual-output or 2-phase. It is also stackableup to 4 phases to support load current as high as 120 A. Interleaved phase shift for 2-, 3-, or4-phases reduce the input and output ripples therefore reducing input and outputcapacitance.

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 outputvoltages, currents and temperatures for individual channels.