IR Introduces Two Configurable Dual Phase PWM Control ICs for Synchronous Buck DC-DC Converters
International Rectifier, (IR®) introduced two dual channel synchronous buck control ICs with integrated high performance drivers for medium- to high-current point-of-load (POL) buck converters used in networking, computing, and communications systems.
The IR3622MPbF and IR3622AMPbF can be configured to support a single output in current share mode, capable of delivering up to 80A, or to support two independent outputs. The independent channels run 180°C out of phase, and reduce the required input capacitance requirement. A significant reduction in output ripple voltage is achieved in single output mode.
"These flexible and feature-rich ICs provide greater protection and configurability to meet the design demands of today’s high performance systems," said Rami Hamze, Senior Marketing Manager for IR’s DC-DC Standard Products.
The IR3622MPbF targets 12V single input applications while the IR3622AMPbF can support 5 and 12V applications. Key protection features include selectable hiccup or latched current limit, pre-bias start-up, thermal shutdown protection, and under- and over-voltage protection. The devices feature a programmable switching frequency up to 600 kHz to reduce input and output filtering requirements, and minimizing the size and number of external filter capacitors and inductors needed. Available in a 32-lead MLPQ package, the new ICs also feature two independently programmable soft-start functions to allow system level sequencing of output voltages in various configurations critical for system level start-up.
The IR3622 family is well suited to multi-rail applications that require sophisticated power-up and power-down tracking and sequencing of multiple rails by offering a combination of track, sequencing, enable, and "power good" output features that can be used to trigger a sequential rise of output voltages across multiple POL converters.
The IR3622MPbF, IR3622MTRPbF, IR3622AMPbF and IR3622AMTRPbF devices are available in 10,000-unit quantities at $1.90 USD each. Production orders are available immediately.
