The LT3042 is a high performance low dropout linear regulator featuring LTC’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive RF applications. Designed as a precision current reference followed by a high performance voltage buffer, the LT3042 can be easily paralleled to further reduce noise, increase output current and spread heat on the PCB. The device supplies 200mA at a typical 350mV dropout voltage. Operating quiescent current is nominally 2mA and drops to <<1μA in shutdown. The LT3042’s wide output voltage range (0V to 15V) while maintaining unity-gain operation provides virtually constant output noise, PSRR, bandwidth and load regulation, independent of the programmed output voltage. Additionally, the regulator features programmable current limit, fast start-up capability and programmable power good to indicate output voltage regulation. The LT3042 is stable with a minimum 4.7μF ceramic output capacitor. Built-in protection includes reverse battery protection, reverse current protection, internal current limit with foldback and thermal limit with hysteresis. The LT3042 is available in thermally enhanced 10-Lead MSOP and 3mm × 3mm DFN packages. Applications * RF Power Supplies: PLLs, VCOs, Mixers, LNAs * Very Low Noise Instrumentation * High Speed/High Precision Data Converters * Medical Applications: Imaging, Diagnostics * Precision Power Supplies * Post-Regulator for Switching Supplies * Ultralow RMS Noise: 0.8μVRMS (10Hz to 100kHz) * Ultralow Spot Noise: 2nV/√Hz at 10kHz * Ultrahigh PSRR: 79dB at 1MHz * Output Current: 200mA * Wide Input Voltage Range: 1.8V to 20V * Single Capacitor Improves Noise and PSRR * 100μA SET Pin Current: ±1% Initial Accuracy * Single Resistor Programs Output Voltage * High Bandwidth: 1MHz * Programmable Current Limit * Low Dropout Voltage: 350mV https://elecena.pl/product/5064880/20v-200ma-ultralow-noise-ultrahigh-psrr-rf-linear-regulator 2015-03-25 https://elecena.pl/product/5064880/20v-200ma-ultralow-noise-ultrahigh-psrr-rf-linear-regulator 2015-06-12 https://elecena.pl/product/5064880/20v-200ma-ultralow-noise-ultrahigh-psrr-rf-linear-regulator 2025-01-20