TLV73333PDBVR

Product Overview

The TLV73333PDBVR from Texas Instruments is a positive fixed-output linear voltage regulator in a surface-mount SOT-23-5 package. It provides a single 3.3 V output at up to 300 mA, with a maximum input voltage of 5.5 V and a dropout voltage of 0.27 V at 300 mA. The device includes an enable control and protection features such as over-current, over-temperature, short-circuit, and under-voltage lockout. Its quiescent current is specified at 60 µA, and power-supply rejection is given as 68 dB to 28 dB from 100 Hz to 100 kHz.

Key Features

• Fixed positive 3.3 V output with one regulator channel.
• Output current capability up to 300 mA.
• Maximum input voltage of 5.5 V.
• Dropout voltage of 0.27 V at 300 mA.
• Quiescent current of 60 µA.
• PSRR of 68 dB to 28 dB over 100 Hz to 100 kHz.
• Enable control feature.
• Over-current, over-temperature, short-circuit, and under-voltage lockout protection.
• Surface-mount SC-74A, SOT-753 / SOT-23-5 package.
• Operating temperature range of -40°C to 125°C at the junction.

Applications

• Regulated 3.3 V rail generation for embedded logic, sensors, and interface circuits operating within the device's 300 mA output limit.
• Local linear regulation in portable or battery-operated systems where the available input voltage remains within 5.5 V and a fixed 3.3 V rail is required.
• Supply conditioning for circuits where specified power-supply rejection from 100 Hz to 100 kHz is relevant.
• Board-level power control where the enable feature can be used to turn the regulator output on or off under system control.

Design & Procurement Notes

When selecting this regulator, confirm that the input voltage does not exceed 5.5 V and that the load current remains within 300 mA. The fixed 3.3 V output cannot be adjusted, so system voltage requirements must match the device's output configuration. For headroom planning, consider the 0.27 V dropout specification at 300 mA and the 60 µA quiescent current. The enable control should be incorporated into power sequencing or standby logic as needed. Protection features cover over-current, over-temperature, short-circuit, and under-voltage lockout, but the design should still verify thermal and electrical margins within the -40°C to 125°C junction temperature range. The surface-mount SOT-23-5 package should be accounted for in layout and assembly planning.