General Description

The RT8256 is an as high voltage buck converter that can support the input voltage range from 4.75V to 22V and the output current can be up to 2A. Current Mode operation provides fast transient response and eases loop stabilization.

The chip provides protection functions such as cycle-by cycle current limiting and thermal shutdown protection. In shutdown mode, the regulator draws 25uA of supply current. The RT8256 is available in a SOP-8 surface mount package.

Features

• Wide Operating Input Range : 4.75V to 22V

• Adjustable Output Voltage Range : 1.22V to 16V

• Output Current up to 2A

• 25uA Low Shutdown Current

• Power MOSFET : 0.18Ω

• High Efficiency up to 95%

• 400kHz Fixed Switching Frequency

• Stable with Low ESR Output Ceramic Capacitors

• Thermal Shutdown Protection

• Cycle-By-Cycle Over Current Protection

• RoHS Compliant and Halogen Free

Applications

• Distributive Power Systems

• Battery Charger

• DSL Modems

• Pre-regulator for Linear Regulators