First 18V multi-channel synchronous buck converter with PMBus

Texas Instruments (TI) has introduced an industry-first four-channel buck DC-DC converter with PMBus/I2C digital interface for applications in space-constrained equipment that experience high ambient operating temperature without cooling, such as small cell base stations, infotainment and solid state devices. The TPS65400 dual- or quad-output configurable DC-DC converter integrates eight power MOSFETs and features industry-leading efficiency at up to 95-percent in the smallest footprint. The TPS65400 includes four high-current synchronous buck switching regulators with integrated MOSFETs. Each switching converter supplies a 2A or 4A 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 2.2MHz. The TPS65400, which can be powered from a single-input voltage rail between 4.5V and 18V, supports applications running off a 5V or 12V intermediate power distribution bus, says the company.