The LT3042 is a high performance low dropout linear regulator with LTC's ultralow noise and ultrahigh PSRR architecture, designed to power noise sensitive RF applications. The LT3042, which is designed as a precision current reference followed by a high performance voltage buffer, can be easily paralleled to reduce noise, increase output current, and spread heat on the PCB.
If you want to learn more about LT3042, please read this article: LT3042 Linear Regulator
