Exar offers a complete family of DC to DC power conversion products for Point-of-Load (PoL) converters from linear LDOs and regulators to high-performance switching regulators and controllers covering applications with currents ranging from a few mA to 30A. These products provide a complete power management solution for non isolated point of load converters operating from an intermediate bus in various distributed power architectures. Exar PowerBlox™ family of high voltage high current step-down regulators provides a high performance market proven solution for POLA replacement with capabilities of up to 12Amps and one the highest current density on the market.
The XRP6124 is a non synchronous step down (buck) controller for up to 5Amps point of loads. A wide 3V to 30V input voltage range allows for single supply operations from industry standard 3.3V, 5V, 12V and 24V power rails. With a proprietary Constant On-Time (COT) control scheme, the XRP6124 provides extremely fast line and load transient response while the operating frequency remains nearly constant. It requires no loop compensation hence simplifying circuit implementation and reducing overall component count. The XRP6124 also implements an emulated ESR circuitry allowing usage of ceramic output capacitors and insuring stable operations without the use of extra external components.
The XRP7664/7665 are synchronous current mode PWM step down (buck) regulators capable of a constant output current up to 2Amps and 3Amps. A wide 4.75V to 18V input voltage range allows for single supply operations from industry standard 5V and 12V power rails.