The LM5109B device is a cost-effective, high-voltage gate driver designed to drive both
the high-side and the low-side N-channel MOSFETs in a synchronous buck or a half-bridge
configuration. The floating
high-side driver is capable of working with rail voltages up to 90 V. The outputs are
independently controlled with cost-effective TTL and
CMOS-compatible input thresholds. The robust level shift technology operates at high speed
while consuming low power and providing clean level transitions from the control input logic to the
high-side gate driver. Undervoltage lockout is provided on both the low-side and the high-side
power rails. The device is available in the 8-pin SOIC and thermally-enhanced 8-pin WSON
packages.