PMBus adopters in good standing can download the current PMBus 1.3 specification by logging in and going to the home page. All others can get the specification by emailing GetPMBusSpec@SMIForum.org. Be sure to include your request, your full name, and your company name in text in English in the body of your email. (Note: We may use the email address you supply to contact you regarding PMBus.) Normally, the current PMBus specification will be delivered to you by email before the end of the next business day.
Older published specs (PMBus 1.0, 1.1 & 1.2)
The PMBus working groups are advancing the PMBus specifications. Joining SMIF and becoming a PMBus adopter allows you to participate the working groups, and provides a mutual license to the resulting specification. To apply to join SMIF and the PMBus group, follow the instructions on the Join PMBus page.