Highly Integrated DC/DC Converter with PMBus Digital Interface

Texas Instruments recently introduced a four-channel buck DC/DC converter with PMBus/I2C digital interface for applications in space-constrained equipment. The TPS65400 dual- or quad-output configurable DC/DC converter integrates eight power MOSFETs. In addition, it features industry-leading efficiency at up to 95% in the smallest footprint.TPS65400 Press Photo

The TPS65400 includes four high-current synchronous buck switching regulators with integrated MOSFETs. Each switching converter supplies a 2- or 4-A output to efficiently power digital circuits, such as the processor, FPGA, ASIC, memory and digital input/output. Switching frequency for the converter is independently adjustable up to 2.2 MHz. The TPS65400 can be powered from a single-input voltage rail between 4.5 and 18 V. It supports applications running off a 5- or 12-V intermediate power distribution bus.

The TPS65400’s benefits and key features include:

  • Flexible power up/down sequencing control increases system reliability.
  • Parameter configuration and status monitoring via PMBus
  • Dynamic voltage scaling to optimize processor performance
  • Phase interleaving reduces input capacitance and ripple
  • Current sharing supports higher output current and enhances design flexibility
  • Small 48-pin VQFN package measures 7 mm × 7 mm × 0.9 mm.

The TPS65400 costs $3.68 in 1,000-unit quantities. The TPS65400EVM-678 evaluation module costs $199.

Source: Texas Instruments

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