The LM5109A is a cost effective, high voltage gate driverdesigned to drive both the high-side and the low-sideN-Channel MOSFETs in a synchronous buck or a half bridgeconfiguration. The floating high-side driver is capable ofworking with rail voltages up to 90V. The outputs are independentlycontrolled with TTL compatible input thresholds.The robust level shift technology operates at high speedwhile consuming low power and providing clean level transitionsfrom the control input logic to the high-side gatedriver. Under-voltage lockout is provided on both the lowsideand the high-side power rails. The device is available inthe SOIC-8 and the thermally enhanced LLP-8 packages.
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