XR76108 Datasheet | MaxLinear

Description The XR76108 and XR76112 are synchronous step-down regulators bining 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 and the XR76112 has a load current rating of 12A. A wide 4.5V 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 and XR76112 provide extremely fast line and load transient response using ceramic output capacitors. They require no loop pensation, simplifying circuit implementation and reducing overall ponent 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 and XR76112 are available in a Ro HSpliant, green / halogen-free, space-saving QFN 5x5mm package. FEATURES - 8A and 12A capable step down regulators - 4.5V to 5.5V low VIN operation - 4.5V to 22V wide single input voltage - ≥0.6V adjustable output voltage - Controller, drivers, bootstrap diode and MOSFETs integrated in one package - Proprietary Constant On-Time control - No loop pensation required - Ceramic output capacitor stable operation - Programmable 200ns - 2µs on-time - Constant 200k Hz - 800k Hz frequency - Selectable CCM or CCM / DCM operation - Precision enable and Power-Good flag - Programmable soft-start - 5x5mm 30-pin QFN package APPLICATIONS - Distributed power architecture - Point-of-Load converters - Power supply modules - FPGA, DSP, and processor supplies - Base stations, switches / routers, and servers Typical...