Typical Application Using LT3045IDD Linear Regulator for Ratiometric Tracking. The LT3045 is a high performance low dropout linear regulator featuring ultra low noise and ultra high PSRR architecture for powering noise sensitive applications. Designed as a precision current reference followed by a high performance voltage buffer, the LT3045 can be easily paralleled to further reduce noise, increase output current and spread heat on the PCB. The device supplies 500mA at a typical 260mV dropout voltage