XR76108中文资料8A Synchronous Step-Down COT Regulator数据手册MaxLinear规格书

描述 Description

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 overcurrent, 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 5 x 5mm package.

特性 Features

·8A capable step-down regulator·4.5V to 5.5V low VIN operation
·3V to 22V wide single input voltage
·3V to 22V PVIN with 5V bias
·≥0.6V adjustable output voltage

·Controller, drivers, bootstrap diode and MOSFETs integrated in one package
·Proprietary constant on-time control·No loop compensation required
·Ceramic output cap. stable operation
·Programmable 200ns-2µs on-time
·Constant 200kHz to 800kHz frequency
·Selectable CCM or CCM/DCM operation

·Precision enable and power good flag
·Programmable soft-start
·5 x 5mm 30-pin QFN package
·Pin compatible 12A regulator, XR76112
·6 x 6mm QFN 15A regulator, XR76115

应用 Application

·Distributed power architecture
·Point-of-Load (POL) converters
·Power supply modules
·FPGA, DSP, and processor supplies
·Base stations, switches/routers and servers