■ General Description

The A5268 is a fixed frequency monolithic synchronous buck regulator that accepts input voltage from 4.75V

to 28V. Two NMOS switches with low on-resistance are

integrated on the die. Current mode topology is used for

fast transient response and good loop stability.

Shutdown mode reduces the input supply current to less

than 1mA. An adjustable soft-start prevents inrush current

at turn-on.

This device is available in SOP-8/PP package with exposed pad for low thermal resistance

■ Applications

■ Distributed Power System

● Networking System

● FPGA, DSP, ASIC Power Supplies

● Notebook Computers

■ Features

● 3A Output Current

● Wide 4.75V to 28V Operating Input Range

● Integrated Power MOSFET Switches

● Output Adjustable from 0.925V to 25V

● Up to 95 Efficiency

● Programmable Soft Start

● Stable with Low ESR Ceramic Output

● Capacitors

● Cycle-by Cycle Over Current Protection

● Fixed 340KHz Frequency

● Input Under Voltage Lockout

● System Protected by Over-current Limiting,

● Over-voltage Protection and Thermal Shut-

down

● Thermally Enhanced SOP-8/PP Package

● Green Products Meet RoHS Standards