Implementations
As of summer 2007, PMBus is relatively new so not many products yet advertise support for it. Given the richness of the specification, firmware based implementations running in microcontrollers are probably easiest to provide, although several of the current products do not involve microcontrollers. One firmware-based example is the Texas Instruments UCD9112. Another uses about 2Kbytes of code on an Atmel AVR 8-bit microcontroller on the NGW100 board controller.
In fall 2009 more products are available. The NXP PIP8000 and Maxim MAX16064 are two recently announced chips, which have vendor-suppled graphical user interfaces (nonportable: MS-Windows only).
As PMBus systems are deployed, tools to manage those systems should become significant. Some of them may just be used during manufacturing, to set up system-specific parameters used with reconfigurable power subsystems. Others will be useful for runtime optimization, for example with server farms.
Read more about this topic: Power Management Bus