TLV1117LV18DCYR

Product Overview

The Texas Instruments TLV1117LV18DCYR is a linear voltage regulator IC with a single positive fixed output. It provides a fixed 1.8 V output at 1 A, with a maximum input voltage of 5.5 V and a maximum dropout of 1.3 V at 800 mA. The device includes overcurrent and overtemperature protection, operates from -40°C to 125°C, and uses a SOT-223-4 surface-mount package. Its 100 µA quiescent current and 75 dB power-supply rejection ratio at 120 Hz support compact regulated power paths.

Key Features

• Fixed 1.8 V positive output from a single linear regulator
• 1 A output current with 100 µA quiescent current
• Maximum input voltage of 5.5 V and dropout of 1.3 V at 800 mA
• Overcurrent and overtemperature protection for regulated 1.8 V power rails
• 75 dB power-supply rejection ratio at 120 Hz
• Surface-mount SOT-223-4 package with -40°C to 125°C operating range

Applications

• Fixed 1.8 V supply rails for board-level electronic subsystems requiring a single positive output
• Compact surface-mount power regulation in embedded assemblies with a 1 A load
• Regulated power paths where 100 µA quiescent current and 1.3 V dropout at 800 mA are design factors
• Power conditioning for circuits needing 75 dB ripple rejection at 120 Hz
• 1.8 V regulation in assemblies operating between -40°C and 125°C with overcurrent and overtemperature protection

Design & Procurement Notes

When selecting this regulator, confirm that the input voltage remains at or below 5.5 V and that the input-to-output differential provides adequate headroom for the required load current. The 1.3 V maximum dropout at 800 mA should be considered as a design margin, particularly in compact board layouts where thermal rise can be limited. Account for the 100 µA quiescent current in power-path budgeting, the 75 dB PSRR at 120 Hz in noise-sensitive supplies, and the -40°C to 125°C operating range during thermal assessment. The SOT-223-4 surface-mount package should be evaluated against pad layout and thermal dissipation.