Exar Corporation’s XR7620x line of 40V buck switching regulators supports a wide input-voltage range of 5V-40V while providing excellent transient response and output accuracy.
Part of the PowerBlox™ family of DC-DC converter products, the XR76203, XR76205 and XR76208 are synchronous step-down regulators providing Point-of-Load (PoL) supplies of 3A, 5A and 8A. They are intended for use in systems powered by well-regulated 24V DC, standard telecoms 18V- 36V or rectified 18V AC or 24V AC supplies.
Benefitting from Exar’s proprietary emulated current-mode Constant On-Time (COT) control loop, the XR76203, XR76205 and XR76208 require no loop compensation, simplifying circuit implementation and reducing overall component count. The control loop also provides 0.07% load and 0.15% line regulation and maintains constant operating frequency.
A selectable power-saving mode allows the user to operate in discontinuous mode when supplying light loads, which helps to improve the converter’s efficiency.
The parts are available in 30-pin, 5mm x 5mm QFN packages.
- Distributed power architectures
- PoL converters
- Power-supply modules
- Power supplies for FPGAs, DSPs or processors
- Networking and telecoms equipment
- Integrated controller, drivers, bootstrap diode and MOSFETs
- Stable with ceramic output capacitors
- Over-current, over-temperature and short-circuit protections
- Under-voltage lock-out