深圳市谷科智电子有限公司

General 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

z 5A Output Current

z Internal Soft-Start

z 110mΩ Internal Power MOSFET Switch

z Internal Compensation Minimizes External Parts

Count

z High Efficiency up to 90%

z 25μA Shutdown Mode

z Fixed 500kHz Frequency

z Thermal Shutdown

z Cycle-by-Cycle Over Current Protection

z Wide 5.5V to 36V Operating Input Range

z Adjustable Output Voltage from 1.222V to 26V

z Available In an SOP8 (Exposed Pad) Package

z RoHS Compliant and Halogen Free

Applications

z Distributive Power Systems

z Battery Charger

z DSL Modems

z Pre-regulator for Linear Regulators