TLV1117LV28DCYR

Product Overview

The TLV1117LV28DCYR from Texas Instruments is a linear voltage regulator integrated circuit that provides a fixed positive 2.8 V output from a single regulator. It is specified for a maximum input voltage of 5.5 V and an output current of 1 A, with a dropout voltage of 1.3 V at 800 mA. The device is supplied in a surface-mount SOT-223-4 package, also identified as TO-261-4 or TO-261AA, and is intended for compact power conversion layouts where a fixed rail and defined thermal limits are required.

Key Features

• Fixed positive output voltage of 2.8 V with one regulator output.
• Output current rating of 1 A and maximum input voltage of 5.5 V.
• Dropout voltage specified as 1.3 V at 800 mA.
• Quiescent current of 100 µA and power supply rejection ratio of 75 dB at 120 Hz.
• Over-current and over-temperature protection features.
• Operating temperature range from -40°C to 125°C.
• Surface-mount SOT-223-4 package, TO-261-4, TO-261AA.

Applications

• A fixed 2.8 V rail for compact general-purpose electronic assemblies that require a single positive output from an input up to 5.5 V.
• Regulated power for low-voltage analog or digital circuitry where a 1 A surface-mount linear regulator is needed.
• A protected 2.8 V supply branch in general-purpose power distribution where over-current and over-temperature limits are relevant.

Design & Procurement Notes

Design and procurement considerations should center on the fixed 2.8 V output, the 5.5 V maximum input limit, and the 1.3 V dropout value at 800 mA when defining headroom. The 1 A output rating, 100 µA quiescent current, and 75 dB PSRR at 120 Hz should be checked against load, standby, and input-noise requirements. The SOT-223-4 surface-mount package and -40°C to 125°C operating range should be matched to the PCB footprint, assembly process, and ambient conditions. The specified over-current and over-temperature protections are device features, not a substitute for system-level fault analysis.