AOZ5473QE Datasheet | Alpha & Omega Semiconductors

Description The AOZ5473QE is a high efficiency synchronous buck smart power stage module consisting of two asymmetrical MOSFETs and an integrated driver. The MOSFETs are individually optimized for operation in the synchronous buck configuration. The high-side MOSFET is optimized to achieve low capacitance and gate charge for fast switching with low duty cycle operation. The lowside MOSFET has ultra-low ON resistance to minimize conduction loss. Highly accurate current (IMON) and temperature (TMON) monitors are integrated in AOZ5473QE. AOS digital controllers, when used with AOZ5473QE, can digitize IMON and TMON to provide fault protection and telemetry via the digital munication bus. A dual functionality TMON/FLT pin reports temperature information during normal operating conditions and also reports OC, OT, HS-short, LS-short faults. When a fault is detected, the TMON/FLT pin is pulled high. Dual-layer OC Protection includes a fixed 80 A detection level which enable an OC fault flag and a 100 A cycle-bycycle current limit. This second-level protection turns off the high-side MOSFET, disabling the output. The AOZ5473QE protection also includes thermal shutdown. The bootstrap switch, with auto boot refresh feature , is integrated into the driver. The low-side MOSFET can be driven into diode emulation mode to provide asynchronous operation when required. The pin-out is optimized for low inductance routing of the converter, keeping the parasitic effects to a minimum. Features - 4.5V to 20V power supply range - 80A of current handling capability - Integrated bootstrap with auto refresh - Up to 1 MHz switching operation - 3.3V Tri-state PWM input patible - Fault detection - Under-Voltage Lockout (UVLO) on VCC - Over Current (OC) - Over Temperature (OT) - High-Side and Low-Side Short - Thermal shutdown - Cycle-by-cycle over current protection - Integrated Current Monitor (IMON) - Integrated Temperature Monitor (TMON) - Low profile QFN5x6-39L package Applications - Server...