The UCC3923 family of devices are Hot-Swap Power Managers for use with negative power supplies. These devices are optimized for use in systems with nominal 48-V supplies, but are fully functional over a supply range of 20 V to 200 V. These devices can be used both on plug-in cards and on back-planes to limit inrush current, control load turnon and turnoff, report faults, isolate faulty loads, and sequence downstream dc-to-dc converters.