Multiphase controllers designed around VR13 & server, data centre needs

Multiphase controllers designed around VR13 & server, data centre needs

New Products |
STMicroelectronics’ PM6773 and PM6776 step-down controllers meet demands for more accurate and energy-efficient power delivery in high-current-demand applications, especially those featuring Intel Skylake CPUs and DDR4 memories, and extending ST’s family of digital step-down controllers for Intel VR13 platforms.
By Graham Prophet


The VR13 Serial Voltage ID (SVID)–compliant ICs are 12V-input, dual-channel, multiphase 3+1 (PM6773) and 6+1 (PM6776) devices. They are PMBus-programmable and feature embedded non-volatile memory (NVM) for storing configuration data. The PMBus communication interface reports voltage, current, power, temperature, and fault status. Both devices include a ‘black-box’ recorder function.


The controllers use ST’s voltage-controlled constant-on-time, (STVCOT) digital-control-loop technology, which enables fast transient response and low output capacitance, as well as variable-frequency diode emulation (VFDE) and dynamic phase management (DPM) to ensure high efficiency over all load conditions. Protection against load overcurrent, under- and over-voltage, and feedback disconnections is also built-in.


Engineers can accelerate the design of the VR13 voltage regulator for Skylake using the PM677x devices with ST’s software tools to program and monitor all key parameters, including control-loop response, load-line, and switching frequency.


In VFQFPN48 6 x 6 mm and VFQFPN40 5 x 5 mm, with package and pin-out compatible with dual sourcing, pricing is $3.00 (1000)






Linked Articles
eeNews Embedded