Industry’s First 0.8μVRMS Noise LDO Has 79dB Power Supply Rejection Ratio at 1MHz

December 30, 2015 // By Amit Patel, Linear Technology
When it comes to powering noise-sensitive analog/RF applications, low dropout (LDO) linear regulators are generally preferred over their switching counterparts. Low noise LDOs power a wide range of analog/RF designs, including frequency synthesizers (PLLs/VCOs), RF mixers and modulators, high speed and high resolution data converters (ADCs and DACs) and precision sensors. Nevertheless, these applications have reached capabilities and sensitivities that are testing the limits of conventional low noise LDOs.
Linear Technology, LT3042, LDO, low noise