LD1117AS33TR in LM1117 / LD1117 LDO Family
The LD1117AS33TR belongs to the LD1117 series by STMicroelectronics, a high-performance low-dropout voltage regulator family designed to provide a stable 3.3V output from varying input sources. Capable of delivering up to 800mA of output current, this bipolar-based LDO is a staple in power management for digital logic. It is widely utilized across industrial and consumer electronics for its balance of low dropout voltage, internal current limiting, and thermal shutdown protection, ensuring reliable power delivery to sensitive downstream components.
Variants in This Sub-Family
Variants within the LD1117 sub-family differ primarily by output voltage configuration and mechanical packaging. While the AS33TR specifies a fixed 3.3V output, other versions offer fixed 1.2V, 1.8V, 2.5V, and 5.0V outputs, or an adjustable version requiring external resistors. Package options such as SOT-223, DPAK, and TO-220 impact thermal resistance and maximum power dissipation limits, allowing engineers to scale based on expected heat loads.
