General Description
The RT8287A is a synchronous step-down regulator with an internal power MOSFET. It achieves 4A of continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. An adjustable soft-start reduces the stress on the input source at startup.
The RT8287A requires a minimal number of readily available external components, providing a compact solution.

FEATUREs
• 4A Output Current
• Adjustable Soft-Start
• 120mΩ/40mΩ Internal Power MOSFET Switch
• Internal Compensation Minimizes External Parts Count
• Fixed 500kHz Frequency
• Thermal Shutdown Protection
• Cycle-by-Cycle Over Current Protection
• Wide 4.5V to 21V Operating Input Range
• Adjustable Output from 0.808V to 15V
• Small 14-Lead WDFN Package
• RoHS Compliant and Halogen Free

APPLICATIONs
• Distributive Power Systems
• Battery Charger
• DSL Modems
• Pre-Regulator for Linear Regulators