Dual-Phase Hybrid Step-Down Synchronous Controller with Load Current Monitor

The LTC7822 uses an ADI-proprietary architecture that merges a soft switching charge pump topology with a dual-phase interleaved synchronous step-down converter to provide superior efficiency and low EMI performance compared to traditional switching architectures. In a typical 48V to 12V application, up to 98.5% efficiency is attainable with the LTC7822.

With reduced switching losses, the hybrid converter allows higher switching frequency without sacrificing much efficiency. The proprietary dual-phase topology greatly reduces the capacitor number in the charge pump stage compared to the single-phase hybrid converters. LTC7822 supports both standard discrete inductors and coupled inductors.

The LTC7822 can be easily paralleled to provide higher output current with its accurate current sharing capability and frequency synchronization function. Current monitor provides an analog voltage reflecting the load current.

APPLICATIONS

* 54V/48V to 5V/12V Conversion

* Intermediate Bus Converters

* High Current Distributed Power Systems

* Telecom, Datacom, and Storage Systems

* 98.5% Peak Efficiency in 48V to 12V Application

* 97.8% Full Load Efficiency at 1kW Output Power

* Wide VIN Range: 19V to 90V (100V ABS Max)

* Output Voltage Up to 35V

* 10V Gate Drive for Optimal Efficiency

* Output Current Monitor