2.5 V fixed LDO — what the ratings mean for your rail
The Texas Instruments TLV1117-25CDCY is a single-output, fixed 2.5 V positive LDO regulator rated for 800 mA continuous output. It comes in a surface-mount SOT-223-4 package (TO-261-4 equivalent) and operates over the 0°C to 125°C temperature range.
75 dB PSRR at 120 Hz — post-rectifier ripple rejection
The 75 dB PSRR at 120 Hz is the spec that matters when this regulator sits after a full-bridge rectifier and bulk capacitor.
Protection and quiescent draw
Built-in over-current and over-temperature protection let the part survive momentary shorts or thermal excursions without external clamp diodes. Quiescent current is 10 mA — not a micropower LDO, but acceptable for always-on rails in mains-powered equipment where the 10 mA Iq is a small fraction of the load budget.
Lifecycle and sourcing
The TLV1117-25CDCY carries an Active lifecycle status and is ROHS3 compliant. No last-time-buy window is open, and no successor has been announced.