XR79103 Datasheet | MaxLinear

Description The XR79103 is part of a family of 22V synchronous step-down power modules bining the controller, drivers, inductor, passive ponents and MOSFETs in a single package for point-of-load supplies. This module requires very few external ponents, leading to ease of design and fast time to market. The XR79103 has a load current rating of 3A. 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 XR79103 provides extremely fast line and load transient response using ceramic output capacitors. It requires no loop pensation, simplifying circuit implementation and reducing overall ponent count. The control loop also provides 0.2% load and 0.2% line regulation and maintains constant operating frequency. A selectable power saving mode allows the user to operate in Discontinuous Current Mode (DCM) at light current loads, significantly increasing the converter efficiency. A host of protection features , including overcurrent, over temperature, short-circuit and UVLO, helps achieve safe operation under abnormal operating conditions. The XR79103 is available in a Ro HS-pliant, green / halogen-free space-saving 6mm x 6mm x 4mm QFN package. Typical Application FEATURES - 3A step-down power module - 4.5V to 22V wide single input voltage - ≥0.6V adjustable output voltage - Controller, drivers, inductor, passive ponents and MOSFETs integrated in one package - Proprietary constant on-time control - No loop pensation required - Stable with ceramic output capacitors - Programmable 100ns to 1µs on-time - Constant 600k Hz to 1000k Hz frequency - Selectable CCM or DCM/CCM operation - Precision enable and power-good flag - Programmable soft-start - 6mm x 6mm x 4mm QFN package APPLICATIONS - FPGA, DSP and processor supplies - Distributed power architecture - Point-of-load converters - Power supply modules - Base stations - Switches and...