MaxLinear XR75100ELTR-F

The XR75100 is a synchronous step-down controller for point-of load supplies up to 20A. A wide 5.5V to 40V input voltage range allows for single supply operation from industry standard 12V, 18V, and 24V DC and AC rails. With a proprietary emulated current mode Constant On-Time (COT) control scheme, the XR75100 provides extremely fast line and load transient response using ceramic output capacitors. It requires no loop compensation hence simplifying circuit implementation and reducing overall component count. The control loop also provides exceptional load and 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 XR75100 is available in a RoHS compliant, green / halogen free space-saving 16-pin 3x3mm QFN package.

• 20A capable step-down controller
• Wide 5.5V to 40V input voltage range
• Integrated high current 2A / 3A drivers
• 0.6 to 30V adjustable output voltage
• Proprietary Constant On-Time control
• No loop compensation required
• Stable ceramic output capacitor operation
• Programmable 200ns to 2µs on-time
• Constant 100kHz to 800kHz frequency
• Selectable CCM or CCM / DCM operation
• Programmable hiccup current limit with thermal compensation
• Precision enable and Power Good flag
• Programmable soft-start
• Integrated bootstrap diode
• 16-pin QFN package

• Networking and communications
• Fast transient Point-of-Loads
• Industrial and medical equipment
• Embedded high power FPGA