APU3146

Technology Licensed from International Rectifier APU3146 DUAL SYNCHRONOUS PWM CONTROLLER WITH CURRENT SHARING CIRCUITRY AND AUTO-RESTART 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 combines 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 Computer Systems Telecom Systems Point of Load Power Architectures 12V C11 C3 C4 VCL VcH1 ...