The LT3009 features a low dropout voltage of only 280mV and delivers up to 20mA of output current, with wide V_IN capability of 1.6V to 20V and an adjustable output from 0.6V to 19.5V. Output tolerance is tightly regulated to within ±2% over line, load and temperature variations. The LT3009 regulator optimizes stability and transient response with low ESR, ceramic output capacitors as small as 1µF. These tiny external capacitors can be used without any necessary series resistance as is common with many other regulators. Internal protection circuitry includes reverse-battery protection, reverse output, and reverse output-to-input protection, current limiting, and thermal limiting.