TPS79333DBVRQ1

Product Overview

The Texas Instruments TPS79333DBVRQ1 is a linear voltage regulator IC that provides a fixed positive 3.3 V output from a single regulator channel. It is supplied in a surface-mount SOT-23-5 package, also identified as SC-74A or SOT-753, and is rated for an input voltage up to 5.5 V. The device includes an enable control function and protection features such as over-current, over-temperature, reverse-polarity, and under-voltage lockout. Its automotive grade and AEC-Q100 qualification support use in qualified automotive electronics designs.

Key Features

• Fixed positive 3.3 V output from a single linear regulator channel
• Maximum input voltage of 5.5 V with 200 mA output current capability
• Voltage dropout of 0.18 V at 200 mA
• Quiescent current of 220 µA and PSRR of 70 dB to 43 dB from 100 Hz to 100 kHz
• Enable control plus over-current, over-temperature, reverse-polarity, and UVLO protection
• Automotive-grade AEC-Q100 qualified device in surface-mount SOT-23-5 package
• Operating temperature range of -40°C to 125°C

Applications

• 3.3 V supply rails for automotive microcontrollers, sensor nodes, and control logic
• Enable-controlled 3.3 V power domains for automotive control modules
• Protected 3.3 V bias supplies for low-current automotive electronics
• Low-dropout 3.3 V regulation from 5.5 V automotive power inputs

Design & Procurement Notes

Designers should verify that the input voltage remains at or below 5.5 V and that the load does not exceed 200 mA. The fixed 3.3 V output and 0.18 V dropout at 200 mA affect headroom selection, while the enable control allows controlled power-domain sequencing. Thermal design should consider the -40°C to 125°C operating range and the surface-mount SOT-23-5 package. For automotive applications, use the AEC-Q100 qualified grade and review system-level protection requirements alongside the integrated over-current, over-temperature, reverse-polarity, and UVLO features.