3.3 V rail in a 1x1 mm footprint
The Texas Instruments TLV74333PDQNR is a fixed 3.3 V output, 300 mA LDO in a 4-X2SON package measuring 1x1 mm. It takes an input up to 5.5 V and delivers a regulated 3.3 V rail with a maximum dropout of 0.27 V at full load. The enable pin lets you gate the output for sequencing or power-save modes. Protection features — current limit, thermal shutdown, and UVLO — are built in, so no external supervisor is needed for basic fault coverage.
PSRR profile — where it helps and where it doesn't
PSRR is 68 dB at 100 Hz, dropping to 28 dB at 100 kHz. That means it knocks down line-frequency ripple and its harmonics well, but above a few hundred kHz the rejection rolls off. If your rail feeds an RF PA or a high-speed ADC with switching noise above 1 MHz, you'll want a post-filter or a regulator with a higher-frequency PSRR floor. For audio codecs, sensor analog supplies, or MCU analog blocks running from a switching pre-regulator, this part cleans up the rail adequately.
Lifecycle and sourcing
No end-of-life notice or last-time-buy window is in effect. The part is ROHS3 compliant.