Linear Technology, now a part of Analog Devices, has released the LTC4417 and LTC4418 prioritized PowerPath controllers. The LTC4417 connects one of three valid power supplies to a common output based on priority whereas the LTC4418 connects one of two valid power supplies. Priority is defined by pin assignment, with V1 assigned the highest priority and V3 the lowest priority. A power supply is defined as valid when its voltage has been within its overvoltage (OV) and undervoltage (UV) window continuously for at least 256 ms. Multiple LTC4418s, as well as triple channel LTC4417s, can be cascaded to provide switch-over between more than two inputs. The LTC4417 and LTC4418 are ideal for servers, computer peripherals, and battery backups on handheld instrumentation applications.