Meeting Power Supply Requirements Through Field-Programmable Device Utilization
Specially Designed to Enable Power Supply for Intel Skylake and DDR4 Memory

STMicroelectronics (hereinafter ST) has launched new step-down controllers PM6773 and PM6776.

These products can meet more precise and energy-efficient power supply requirements in servers and data centers by utilizing the latest low-voltage, high-current microprocessors, ASICs, and field-programmable devices.

These new ICs are included in ST's family of digital step-down controllers for the Intel VR13 platform and are specifically designed to supply power to Intel's Skylake CPUs and DDR4 memory.



Compatible with VR13 SVID (Serial Voltage ID), these ICs are multiphase 3+1 (PM6773) and 6+1 (PM6776) devices with 12V input and dual-channel configuration. They are PMBus™ programmable and feature embedded non-volatile memory (NVM) for storing configuration data. Additionally, the PMBus communication interface can report voltage, current, power, temperature, and fault status. Both devices also include a useful black-box recording function.

Utilizing ST's high-performance digital control loop technology STVCOT® (ST's high-performance Voltage-Controlled Constant-On-Time), these devices provide fast transient response and low output capacitance, as well as VFDE (Variable-Frequency Diode Emulation) and DPM (Dynamic Phase Management) to ensure high efficiency under all load conditions. Built-in protection functions against load overcurrent, under-voltage/overvoltage, and feedback open-circuit are also included.

Using ST's advanced software tools, VR13 voltage regulator design for Skylake using the new PM677x devices can be accelerated, and all critical parameters including control-loop response, load-line, and switching frequency can be programmed and monitored.

PM6773 and PM6776 are currently produced and supplied in VFQFPN48 6x6mm and VFQFPN40 5x5mm packages, with package and pin-out compatibility possible for dual sourcing with industry-leading manufacturers' products.