MaxLinear XR75100

Description

The XR75100 is a synchronous step-down controller for point-of load supplies up to 20A. A wide 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 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 RoHS compliant, green/halogen free space-saving 16-pin 3x3 QFN package.

Features

• 20A Capable Step Down Controller
• ◦Wide 5.5V to 40V Input Voltage Range
• ◦Integrated high Current 2A/3A Drivers
• ◦0.6V Adjustable Output Voltage
• Proprietary Constant On-Time Control
• ◦No Loop Compensation Required
• ◦<0.01%/V Line Regulation
• ◦Ceramic Output Cap. Stable operation
• ◦Programmable 200ns-2µs on-time
• ◦Constant 100kHz-800kHz Freq.
• ◦Selectable CCM or CCM/DCM Operation
• Programmable current limit
• ◦110ms Hiccup mode
• Precision Enable and Power-Good Flag
• Programmable Soft-start
• Integrated Bootstrap diode
• 16-pin QFN Packages

Typical applications

• Networking and Communications
• Industrial Equipment
• Fast Transient Point-of-Loads
• Embedded High Power FPGA
• Automotive
• Medical Equipment

More information

• Datasheet
• IC product information