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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftps546d24s”>View Datasheet
Texas Instruments TPS546D24S SWIFT™ Step-Down PMBus® Converter is highly integrated and non-isolated, built to expand on the TPS546D24A by adding manufacturer-specific PMBus commands and extended write protect and Passkey. These features increase security against malicious access to the PMBus by restricting Write capability with more excellent resolution than the standard Write Protect command.
The TI TPS546D24S offers a high-frequency operation and 40A current output in a 7mm × 5mm package. Up to four TPS546D24S devices can be interconnected to deliver up to 160A on a single output. The converter can overdrive the internal 5V LDO with an external 5V supply through the VDD5 pin to improve efficiency and reduce the power dissipation of the converter.
The TPS546D24S utilizes a proprietary fixed-frequency current-mode control with input feed-forward and selectable internal compensation components for minimal size and stability over a wide range of output capacitances.
The PMBus interface with 1MHz clock support gives a convenient, standardized digital interface for converter configuration and monitoring key parameters, including output voltage, output current, and internal die temperature. Depending on system requirements, response to fault conditions can be set to restart, latch off, or ignore. Back-channel communication between stacked devices allows all TPS546D24S converters to power a single output rail to share a single address to simplify system software/firmware design. Key parameters, including output voltage, switching frequency, soft-start time, and overcurrent fault limits, can also be configured through BOM selection without PMBus communication to support program-free power-up.
