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1.5A LDO+ Regulator Monitors Current & Temperature

Robert Dobkin - Chief Technical Officer Feb 5th 2014

LDO+ regulators do more than just regulate. They include monitor and control functions as well as regulation. The LT3081 has a wide safe area, allowing operation with high currents at high input-output differentials. Output voltage is adjustable from from 0 to 37 volts and it withstands reverse voltage. In addition to regulating, it has a current monitor output, providing an analog output current proportional to the output of the regulator. Current limit can be adjusted with a single external resistor. A second monitor current is proportional to the chip temperature. This output can be used to monitor the health of the system, airflow, and is useful in debugging. Unlike any other regulator, the LT3081 output capacitor is optional. It’s stable with no output or input capacitor. The LT3081 can be used in areas where intrinsic safety is important or it can be used as a current source. Finally, it’s adjustable down to zero volts, which means as the logic voltages go lower and lower, this will never be obsoleted.

LT3081 cover graphic