IR3622AMPBF Datasheet | International Rectifier

Data Sheet No PD94723 rev A .. IR3622AMPb F HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING Description Features - - - - - - - - - - - - - - - - - - Dual Synchronous Controller with 180o Out of Phase Operation Configurable to 2-Independent Outputs or Current Shared Single Output Output Voltage Tracking Power up / down Sequencing Current Sharing Using Inductor’s DCR +/-1% Accurate Reference Voltage Programmable Switching Frequency up 600k Hz Programmable Over Current Protection Hiccup Current Limit Using MOSFET Rds(on) sensing Latched Overvoltage Protection Dual Programmable Soft-Starts Programmable Enable Input Pre-Bias Start-up Dual Power Good Outputs On Board Regulator External Frequency Synchronization Thermal Protection 32-Lead MLPQ Package The IR3622A IC integrates a dual synchronous Buck controller, providing a high performance and flexible solution. The IR3622A can be configured as 2-independent outputs or as current shared single output. The current share configuration is ideal for high current applications. The IR3622A enables output tracking and sequencing of multiple rails in either ratiometric or simultaneous fashion. The IR3622A Features 180o out of phase operation which reduces the required input/output capacitance and results in lower number of capacitors. The switching frequency is programmable from 200k Hz to 600k Hz per phase using one external resistor. In addition, IR3622A also allows the switching frequency to be synchronized to an external clock signal. Other key Features offered by this device include two independent programmable soft starts, two independent power good outputs, precision enable input, and under voltage lockout function. The current limit is provided by sensing the lower MOSFET's on-resistance for optimum cost and performance. The output voltages are monitored through dedicated pins to protect against open circuit, and enhance faster response to...