APU3146 Datasheet | Advanced Power Electronics Corp

FEATURES Dual Synchronous Controller with 180 out-of-phase Configurable to 2-Independent Outputs or 2-Phase Single Output Current Sharing Using Inductor's DCR Current Limit using MOSFET's RDS(ON) Hiccup/Latched Current Limit Latched Over-Voltage Protection Vcc from 4.5V to 16V Input Programmable Switching Frequency up to 500KHz Two Independent Soft-Starts/ Shutdowns 0.8V Precision Reference Voltage Available Power Good Output External Frequency Synchronization DESCRIPTION The APU3146 IC bines a Dual synchronous Buck controller, providing a cost-effective, high performance and flexible solution. The APU3146 can configured as 2independent or as 2-phase controller. The 2-phase configuration is ideal for high current applications. The APU3146 features 180 out of phase operation which reduces the required input/output capacitance and results to few number of capacitor quantity. Other key features offered by this device include two independent programmable soft starts, programmable switching frequency up to 500KHz per phase, under voltage lockout function. The current limit is provided by sensing the lower MOSFET's on-resistance for optimum cost and performance. 2-Phase Power Supply Graphic Card DDR Memory Applications D1 C12 APPLICATIONS Embedded puter Systems Tele Systems Point of Load Power Architectures 12V C11 C3 C4 VCL Vc H1 VOUT3 Vc H2 Vcc HDrv1 C13 R1 C14 Q2 L3 C5 OCSet1 Hiccup LDrv1 PGnd1 VP2 Q3 R5 Sync 1.8V @ 30A C15 R2 VREF Rt C8 R3 U1 APU3146 VSEN1 D2 BAT54A R10 C16 R11...