Fixed 3V output, 150mA — headroom and dropout
The TC1185-3.0VCT713 is a fixed-output positive LDO regulator from Microchip Technology, delivering a regulated 3V at up to 150mA from a single SOT-23-5 package. Maximum dropout is 0.4V at full load, meaning the input rail needs to stay above 3.4V to maintain regulation — a tight budget for 3.3V or 3.6V rails feeding 3V logic or sensor supplies. Quiescent current sits at 80 µA typical, making it a reasonable fit for always-on or battery-backed rails where standby draw matters.
PSRR and protection — noise rejection and fault tolerance
Power supply rejection ratio is 64 dB at 1 kHz, which filters a good portion of switching-regulator ripple on the input rail — useful when the LDO sits downstream of a buck converter feeding an analog front-end or a precision reference. Built-in over-current and over-temperature protection keep the die safe under a sustained short or high ambient.
Package and sourcing — SOT-23-5 on tape
Housed in a SOT-23-5 surface-mount package, supplied on Tape & Reel or Cut Tape. The small footprint suits compact PCBs, but thermal dissipation is limited — the 150mA output at high dropout or high ambient needs attention to copper area on the PCB.