The XR76108 is a synchronous step-down regulator combining the controller, drivers, bootstrap diode and MOSFETs in a single package for point-of-load supplies. The XR76108 has a load current rating of 8A. A wide 3V to 22V input voltage range allows for single supply operation from industry standard 5V, 12V and 19.6V rails.
With a proprietary emulated current mode Constant On-Time (COT) control scheme, the XR76108 provides extremely fast line and load transient response using ceramic output capacitors. They require no loop compensation, simplifying circuit implementation and reducing overall component count. The control loop also provides 0.25% load and 0.1% line regulation and maintains constant operating frequency. A selectable power saving mode, allows the user to operate in discontinuous mode (DCM) at light current loads thereby significantly increasing the converter efficiency.
A host of protection features, including over-current, over-temperature, short-circuit and UVLO, help achieve safe operation under abnormal operating conditions.
The XR76108 is available in a RoHS-compliant, green/halogen-free space-saving QFN 5x5mm package.