The LT1117CST-3.3#PBF is a low dropout positive fixed 3.3V regulator designed by Linear Technology, now part of Analog Devices, that offers the benefits of high efficiency, low dropout performance, and ease of use. This regulator is capable of delivering up to 800mA of output current with a dropout voltage of typically 1.2V at full load, making it an excellent choice for applications where the supply voltage is very close to the output voltage, and efficiency is paramount.

Featuring a wide input voltage range from 2.7V to 15V, the LT1117CST-3.3#PBF is versatile and can be used in a variety of power supply configurations. It is also designed with thermal overload protection and safe area protection, ensuring reliability and robustness under different load conditions and thermal environments. Additionally, the device includes current limiting, making it tolerant to output short circuits, which adds to the overall durability of the regulator.

The LT1117CST-3.3#PBF comes in a surface-mount TO-220 package, which is widely used and recognized for its thermal performance, making it suitable for applications that require a compact footprint without compromising thermal dissipation. This product is also lead-free and RoHS compliant, addressing environmental concerns and regulatory requirements for hazardous substances.

Applications for the LT1117CST-3.3#PBF are diverse and include but are not limited to: on-card regulation for elimination of noise and distribution problems associated with single-point regulation, portable computing devices, and as a post-regulator for switching supplies. Its fixed output voltage of 3.3V makes it a common choice for logic and digital circuits that require a stable and regulated power supply.

In summary, the LT1117CST-3.3#PBF is a reliable and efficient solution for a wide range of applications requiring a fixed 3.3V output. Its features, including low dropout performance, thermal protection, and current limiting, combined with the convenience of a fixed output, make it a robust choice for designers looking for a high-quality voltage regulator.