1A LDO with 0.8V fixed output — active, in TO-220-5
The MCP1826-0802E/AT is a single-output positive LDO regulator delivering 1A with a fixed 0.8V output, housed in a through-hole TO-220-5 package. Maximum dropout is 0.4V at the full 1A load, meaning the input rail must stay at least 0.4V above 0.8V across temperature to maintain regulation. Quiescent current is 220µA typical, making it suitable for always-on rails where the regulator's own draw is a secondary concern behind load transient response.
What the PSRR and protection features mean for the board
Power supply rejection ratio is 60dB at 100Hz — this attenuates 100Hz ripple from a mains-derived rectifier by a factor of 1000, so a noisy upstream rail does not couple into the 0.8V supply. On-chip protection includes over-temperature shutdown, short-circuit current limit, and under-voltage lockout (UVLO), which together prevent the regulator from supplying a load during brownout or thermal fault conditions. Control features are enable and power-good — the enable pin allows sequenced power-up, and the power-good flag can drive a reset supervisor or FPGA configuration logic.
Temperature range and package — integration into a through-hole design
The TO-220-5 through-hole package (supplier device package TO-220-5) mounts into a standard 5-lead TO-220 footprint and dissipates heat through the tab to a copper area on the board or to a heatsink.