TLV74033PDQNR

Product Overview

The Texas Instruments TLV74033PDQNR is a single-output linear voltage regulator that provides a fixed positive 3.3 V output at up to 300 mA. It uses a 4-X2SON (1x1) surface-mount package for compact board-level power distribution. The device operates from an input voltage up to 5.5 V and has a maximum dropout voltage of 0.5 V at the full 300 mA output current. Its 80 µA quiescent current and PSRR of 67 dB to 32 dB from 100 Hz to 1 MHz support regulation of small logic or sensor rails where board area and idle power are important.

Key Features

• Fixed positive 3.3 V output with 300 mA rated output current.
• Maximum input voltage of 5.5 V and maximum dropout voltage of 0.5 V at 300 mA.
• 80 µA quiescent current for low idle power consumption.
• PSRR of 67 dB to 32 dB across 100 Hz to 1 MHz.
• Includes enable control and current limit as control features.
• Protection includes over current, over temperature, and under-voltage lockout.
• Operating junction temperature range is -40°C to 125°C.
• 4-X2SON (1x1) surface-mount package supports compact PCB assembly.

Applications

• Local 3.3 V rail for small embedded logic or microcontroller circuits.
• Power regulation in battery-operated portable electronics where idle current matters.
• Supply rail for sensor interface boards and compact measurement modules.
• Regulated 3.3 V output for space-constrained control boards.

Design & Procurement Notes

Design notes should consider the 5.5 V maximum input limit and the 0.5 V dropout requirement at 300 mA when selecting the upstream supply. The fixed 3.3 V output is not adjustable, so the load voltage tolerance and input headroom must be matched to the circuit. The 80 µA quiescent current is relevant for battery-powered rails, while the enable control can be used for power sequencing or load disconnect if required by the system design. The 4-X2SON (1x1) package requires attention to PCB land pattern, thermal dissipation, and soldering process. Protection features such as current limit, over temperature, and UVLO should be considered in the overall system fault strategy, but external filtering and layout should still be evaluated for the intended load and input source.