In summary, the LT3071 is a low voltage, fast transient response linear regulator. The device supplies up to 5A of output current with a typical dropout voltage of 85mV. The LT3071’s high bandwidth permits the use of low ESR ceramic capacitors, saving bulk capacitance and cost. Output voltage is digitally selectable in 50mV increments over a 0.8V to 1.8V range. An analog margining function allows the user to adjust system output voltage by ±10%. The IC incorporates a unique tracking function to control a buck regulator powering the LT3071’s input. This tracking function drives the buck regulator to maintain the LT3071’s input voltage to V_OUT + 300mV, minimizing power dissipation. The output current monitor feature provides a scaled dynamic representation of output current that can be measured directly or terminated with a resistor and converted to voltage. All of these features make the LT3071 ideal for high performance FPGAs, microprocessors, and sensitive communication applications.