TPS546C23 4.5V to 18V, 35A, 2X Stackable Synchronous Buck Converter with PMBus™ supporting Telemetry |


4.5V to 18V, 35A, 2X Stackable Synchronous Buck Converter with PMBus™ supporting Telemetry


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The TPS546C23 devices are PMBus 1.3 Compliant, non-isolated DC/DC converters with integrated FETs, capable of high-frequency operation and 35-A current output from a 7-mm × 5-mm package. Two TPS546C23 devices can be paralleled together to provide up to 70-A load. Current sensing is realized by sampling a small portion of the power stage current and independent on the device temperature. High-frequency, low-loss switching, provided by an integrated NexFET power stage and optimized drivers, allows for very high-density power solutions. The PMBus interface enables the AVS functions through VOUT_COMMAND, flexible converter configuration, as well as key parameters monitoring including output voltage, current, and internal die temperature. Response to fault conditions can be set to either restart, latch-off or ignore depending on system requirements.


  • 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, Fault Responses
    • 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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Parametrics Compare all products in Buck converters (integrated switch)

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Control mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Package Group
Adjustable Current Limit
Dynamic Voltage Scaling
Frequency Synchronization
Phase Interleaving
Power Good
Remote Sense
Synchronous Rectification
UVLO Adjustable
Voltage Margining    
Voltage Mode    
-40 to 125    
LQFN-CLIP | 40    

Design tool

WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPS546C23

  Min   Max Range
Vin  V 4.5 to 18.0V
Vout  V 0.35 to 5.5V
Iout  A ≤ 35A
Ambient Temp  °C -40 to 125°C

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