SNVSA47C February 2016 – December 2020 LM5165
The LM5165 is a step-down buck converter with integrated high-side PMOS buck switch and low-side NMOS synchronous switch. During the high-side MOSFET on-time, the SW voltage VSW swings up to approximately VIN, and the inductor current increases with slope (VIN – VOUT)/LF. When the high-side MOSFET is turned off by the control logic, the low-side MOSFET turns on after an adaptive deadtime. Inductor current flows through the low-side MOSFET with slope –VOUT/LF. Duty cycle D is defined as TON/TSW, where TON is the high-side MOSFET conduction time and TSW is the switching period.