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4.5 V to 18 V, 35 A, 2X stackable synchronous buck converter with PMBus™ and telemetry


Package | PIN: LQFN-CLIP (RVF) | 40
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $10.24
10-24 $9.21
25-99 $8.60
100-249 $7.71
250-499 $7.20
500-749 $6.27
750-999 $5.42
1000+ $5.31


  • PMBus™ 1.3 Compliant Converters: 35 A
  • 2-Device Stackable for up to 70 A With Current Sharing
  • Input Voltage Range: 4.5 V to 18 V
  • Output Voltage Range: 0.35 V to 5.5 V
  • Integrated 3.2-mΩ and 1.4-mΩ Stacked NexFET™ Power Stage
  • 350-mV to 1650-mV Reference for Adaptive Voltage Scaling (AVS) Function and Margining through PMBus
  • 0.5% Reference Accuracy at 600 mV and Above
  • Lossless Low-Side MOSFET Current Sensing
  • Voltage Mode Control With Input Feed-Forward
  • Differential Remote Sensing
  • Monotonic Start-Up into Pre-Biased Output
  • Output Voltage and Output Current Reporting
  • Internal Die Temperature Monitoring
  • 64 Programmable PMBus Addresses via ADDR0 and ADDR1 Pins
  • Programmable via the PMBus Interface:
    • OCP, UVLO, Soft-Start, PG, OV, UV, OT Levels, FaultResponses
    • Turnon and Turnoff Delays
  • Thermal Shutdown
  • Pin Strapping for Switching Frequency: 200 kHz to 1 MHz
  • Frequency Synchronization to an External Clock or Output Clock to Sync Out
  • Create a Custom Design Using the TPS546C23 With the WEBENCH® Power Designer

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Texas Instruments  TPS546C23RVFT

The TPS546C23 devices are PMBus 1.3 Compliant, non-isolated DC/DCconverters with integrated FETs, capable of high-frequency operation and 35-A current output from a7-mm × 5-mm package. Two TPS546C23 devices can be paralleled together to provideup to 70-A load. Current sensing is realized by sampling a small portion of the power stage currentand independent on the device temperature. High-frequency, low-loss switching, provided by anintegrated NexFET power stage and optimized drivers, allows for very high-density power solutions.The PMBus interface enables the AVS functions through VOUT_COMMAND, flexible converterconfiguration, as well as key parameters monitoring including output voltage, current, and internaldie temperature. Response to fault conditions can be set to either restart, latch-off or ignoredepending on system requirements.