TLV1117LV33DCYR

Product Overview

The TLV1117LV33DCYR from Texas Instruments is a positive fixed-output linear voltage regulator intended for surface-mount power regulation. It provides a single 3.3 V output at up to 1 A from an input voltage up to 5.5 V. The device is housed in a SOT-223-4 package, also identified as TO-261-4 or TO-261AA, and supports operating temperatures from -40°C to 125°C. Built-in over-current and over-temperature protection help manage fault conditions during normal load operation.

Key Features

• Fixed 3.3 V positive output with 1 A maximum output current
• Input voltage range up to 5.5 V
• Voltage dropout of 1.3 V at 800 mA
• Quiescent current of 100 µA
• PSRR of 75 dB at 120 Hz
• Over-current and over-temperature protection
• SOT-223-4 surface-mount package, TO-261-4 / TO-261AA case
• Operating temperature range from -40°C to 125°C

Applications

• General-purpose 3.3 V rail regulation for digital logic circuits
• Microcontroller and sensor board power supplies
• Post-regulation of a higher input rail to provide a fixed 3.3 V output
• Compact surface-mount power supplies in equipment using SOT-223-4 packages
• Embedded system power management

Design & Procurement Notes

When selecting this regulator, verify that the input voltage does not exceed 5.5 V and that the load current remains within 1 A. Consider the 1.3 V dropout at 800 mA when calculating headroom between input and output. The 100 µA quiescent current and 75 dB PSRR at 120 Hz are relevant for power budget and noise-sensitive designs. The SOT-223-4 surface-mount package requires pad and thermal layout appropriate for a 3.3 V, 1 A linear regulator.