150 mA LDO with 70 dB PSRR at 10 kHz
The MCP1801T-3002I/OT is a fixed 3 V output LDO rated for 150 mA continuous, with a maximum input of 10 V. The 70 dB PSRR at 10 kHz means it rejects switching noise from a downstream DC-DC converter — useful when powering analog front-ends or sensor bias rails where ripple couples into the signal chain. Dropout voltage is 0.35 V max at 100 mA load — the headroom between the input rail and 3 V output must stay above that figure across load and temperature to keep regulation. Quiescent current is 50 µA typical, low enough for battery-powered devices that spend most of their time in a light-load state. The enable pin lets the system power down the regulator when the load is idle, cutting the quiescent draw further.
Housed in the SOT-23-5 (SC-74A) surface-mount package, the MCP1801T-3002I/OT places a single output rail in a five-pin footprint. Overcurrent protection is built in, so a short on the output rail folds back the current without damaging the regulator. No external protection diode is needed for normal operation.
Lifecycle and compliance
It is fully RoHS3 compliant, which covers the current EU exemption list. No official pin-compatible second source is documented, but several general-purpose 150 mA LDOs in SOT-23-5 exist; verify the dropout and PSRR against the BOM requirement before substituting.