ATX Version 3 Multi Rail Desktop Platform Power Supply

Design Guide

ID 336521
Date 11/01/2023
Document Table of Contents

+5VSB at Power-Down – REQUIRED

After AC power is removed, the +5VSB standby voltage output must remain at its steady state value for the minimum hold-up time specified in Section 4.2.9 until the output begins to decrease in voltage. The decrease shall be monotonic in nature, dropping to 0.0 V. There shall be no other disturbances of this voltage at or following removal of AC power.