TPS546C20A

• 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
• 2 PMBus Addresses (Master 36d/Slave 37d)
• Selectable Boot-up Vout and Soft Start Values via Pin-Strapping
• 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 TPS546C20A With the WEBENCH^® Power Designer

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The TPS546C20A 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 TPS546C20A 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.