LD1117S33TR in LM1117 / LD1117 LDO Family
The LD1117S33TR is a fixed-output low-dropout voltage regulator from STMicroelectronics, belonging to the industry-standard LD1117 family. Designed to deliver up to 800 mA of output current with a fixed 3.3V output, it is a staple in power management for digital circuits. It features a bipolar NPN pass transistor architecture, providing reliable regulation with a dropout voltage typically around 1.1V at full load, making it ideal for converting 5V rails to 3.3V logic levels.
Variants in This Sub-Family
Variants within the LD1117 sub-family primarily differ by output voltage, package type, and tolerance levels. While the LD1117S33TR specifies a fixed 3.3V in a SOT-223 package, other versions offer adjustable outputs (LD1117V) or fixed values such as 1.2V, 1.8V, and 5.0V. Package options like TO-220 and DPAK are available for higher power dissipation requirements, and 'C' suffix versions denote different temperature ranges or tighter voltage accuracies.
