PCIregler

PCIregler is a generic term used to describe devices or modules that regulate the electrical power delivered to PCI buses and PCIe expansion cards. It is not the name of a single standard or product, but rather a class of power-regulation solutions found in desktops, servers, and embedded systems to meet the voltage, stability, and protection requirements of PCI-based hardware.

A PCIregler takes input power from the system’s main supply, commonly including rails such as 12V and 5V, and provides regulated outputs used by PCI or PCIe devices, typically 3.3V and sometimes additional rails. Implementations may employ switching regulators or linear regulators, supported by feedback sensing to maintain tight load and line regulation. Remote sense lines can compensate for voltage drop along traces and connectors. The module often includes sequencing and monitoring features: a power-good signal, under-voltage and over-current protection, over-temperature protection, and fault reporting. Some designs integrate with system firmware to coordinate with other power-management functions.

PCIregler modules appear as standalone boards, as VRM blocks on motherboards, or as external regulation units in lab benches and industrial equipment. They are especially relevant in configurations where PCI or PCIe devices have stringent stability requirements, operate under non-standard loads, or involve unusual backplane wiring or hot-plug scenarios.

Because PCIregler is not a formal standard, its specifications are determined by the particular product or design. Related concepts include PCI Local Bus and PCI Express specifications, voltage regulator modules (VRMs), and general power-supply quality and EMI/EMC considerations.