LT1084IT#PBF

The LT1084IT#PBF from Analog Devices is a 5A low dropout (LDO) positive adjustable voltage regulator housed in a TO-220 power package. This device delivers a continuous output current up to 5A with a typical dropout voltage of 1.3V at full load, allowing efficient regulation with minimal input-to-output differential. The output voltage is adjustable from a 1.25V reference level using an external resistor divider, and internal protection features include current limiting, thermal shutdown, and safe-area compensation for the pass transistor, ensuring reliable operation under fault conditions.

Typical applications span industrial automation, test and measurement, and high-reliability power systems demanding low-noise linear regulation. Common use cases include local on-card regulation for FPGAs and analog front-ends, low-ripple post-regulation of switching converters, and constant-current/constant-voltage battery charging circuits. In defense and aerospace environments, the industrial temperature range (-40°C to +125°C, indicated by the 'IT' suffix) and the TO-220’s inherent ability to dissipate heat via external heatsinks make it well-suited for ruggedized embedded systems. From a procurement perspective, the '#PBF' suffix denotes lead-free, RoHS-compliant plating, and as a mature Linear Technology design now manufactured by Analog Devices, the part remains in active production with no near-term end-of-life notice, supporting long-lifecycle programs and minimizing obsolescence risk.