A high voltage, low noise, low dropout voltage linear regulator with active output discharge has been released by Linear Technology Corporation. The LT3063 delivers up to 200mA of continuous output current with a 300mV dropout voltage at full load.

This IC includes an internal NMOS pull-down that discharges the output voltage if either the SHDN pin is driven low or the input voltage is turned off.

This rapid output discharge helps protect the load in applications requiring power conditioning on both start-up and shutdown, such as highend imaging sensors.
This IC features a wide 1.6V to 45V input voltage range and delivers adjustable output voltages from 0.6V to 19V. A single capacitor provides programmable ultralow noise operation, only 30µVRMS across a 10Hz to 100kHz bandwidth and reference soft-start functionality, preventing output voltage overshoot at  turn-on.

The LT3063’s output voltage tolerance is highly accurate at ±2% over line, load and temperature. The device’s input and output voltage range, fast transient response, low quiescent current of 45µA (operating) and <3µA (in shutdown) make it an ideal choice for portable batterypowered systems that require optimum
run time, and for usage in automotive, industrial and avionic power supply applications.

The LT3063 operates with a small, low cost, ceramic output capacitor, optimising stability and transient response. The IC is stable with a minimum value 3.3µF output capacitor. The device’s internal protection circuitry includes reverse-battery protection, reverse-current protection, current limit with foldback and thermal limiting.

Linear Technology Corporation