Richtek RT8279

Description

The RT8279 is a step-down regulator with an internal power MOSFET. It achieves 5A 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.For protection, the RT8279 provides cycle-by-cycle current limiting and thermal shutdown protection. An adjustable soft-start reduces the stress on the input source at startup. In shutdown mode, the regulator draws only 25μA of supply current.The RT8279 requires a minimum number of readily available external components, providing a compact solution. The RT8279 is available in the SOP-8 (Exposed Pad) package.

Features

• 5A Output Current
• Internal Soft-Start
• 110mΩ Internal Power MOSFET Switch
• Internal Compensation Minimizes External Parts Count
• High Efficiency up to 90%
• 25μA Shutdown Mode
• Fixed 500kHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 5.5V to 36V Operating Input Range
• Adjustable Output Voltage from 1.222V to 26V
• Available In an SOP8 (Exposed Pad) Package
• RoHS Compliant and Halogen Free

Typical applications

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

More information

• Datasheet
• IC product information