One Resistor Takes Heat from Single-Supply Op Amps

Abstract: To minimize the power dissipation in a single-supply op amp, driving a ground-referenced load, connect a pullup resistor, with value equal to the load resistor between the output and the positive supply voltage. This addition enables the op amp to operate at higher ambient temperatures and drive lower-resistance loads, limited only by its maximum ratings for output voltage and current (rather than the package power dissipation).