The LT3041 is a high-performance, low-dropout linear regulator featuring Analog Devices, Inc., ultra-low noise and ultra-high power supply rejection ratio (PSRR) architecture for powering noise-sensitive applications. Designed as a precision-current reference followed by a high-performance voltage buffer, the LT3041 can be easily paralleled to further reduce noise, increase output current, and spread heat on the printed circuit board (PCB).The LT3041 supplies 1 A at a typical 310 mV dropout voltage. The operating quiescent current is nominally 4.3 mA and drops to 18 μA in shutdown. The wide output voltage range (0.2 V to 15 V) of the LT3041 maintained by the unity-gain operation provides virtually constant output noise, PSRR, bandwidth, and load regulation, independent of the programmed output voltage. Additionally, the regulator features VIOC, programmable current limit, fast start-up capability, and programmable power good to indicate output-voltage regulation.Built-in protection includes reverse-battery protection, reverse-current protection, internal current limit with foldback, and thermal limit with hysteresis. The LT3041 is available in a thermally enhanced, 14-lead 4 mm × 3 mm, DFN package.APPLICATIONSRF power supplies: phase-locked loops, voltage-controlled oscillators, mixers, low-noise amplifiers, and power amplifiersLow-noise instrumentationHigh-speed and high-precision data convertersMedical applications: imaging and diagnosticsPostregulator for switching supplies