The second generation of SupIRBuck integrated PoL (point-of-load) voltage regulators are for energy-efficient telecomms, consumer, set-top-box, high-performance server, and storage applications. The family of wide-input, single-output regulators integrate the company's control ICs, optimised with benchmark HEXFET MOSFETs in a 5x6x0.9mm power QFN package. The Gen2 SupIRBuck family, says the company, features its advances in control-IC, MOSFET and package-integration technologies to deliver 4, 8 and 12A output current with benchmark efficiency over the entire load range. While optimised for a 12V input voltage, efficiencies are also achieved in applications with 9.6, 5 or 3.3V input voltages. Input-voltage range is 1.5 to 16V with 5V bias, and output-voltage range is 0.7V to 90% Vin. The devices offer a switching frequency up to 1.5MHz to allow the use of smaller inductors and fewer output capacitors. Tailored for data-centre applications, the devices provide features that are claimed to significantly reduce overall system complexity and size. The efficiency and thermal properties deliver full current rating with no air flow and without a heatsink and allow rear-mounting on a motherboard to provide additional space savings. The family delivers benchmark peak efficiencies higher than 96% for energy savings and system reliability. The devices' common scalable footprint offers the flexibility to adapt to changing output-current requirements, which can be optimised for space-constrained applications. The features of these voltage regulators include over-current and over-temperature protection, programmable switching frequency, enable input with input-voltage-monitoring capability, hiccup-current limit, soft-start, power-good output, advanced pre-bias start-up, a 1% accurate 0.7V reference voltage, sequencing, and a dedicated device for DDR memory tracking.
