GENERAL DESCRIPTION

The patent-pending ACT8309/ACT8310/ACT8311 are current-mode, fixed-frequency PWM, synchronous step-down DC/DC converters that are capable of delivering 1.5A with efficiency of up to 95. These devices operate with a fixed frequency of 1.35MHz, minimizing noise in sensitive equipment as well as optimizing both efficiency and component size and cost.

FEATURES

• Multiple Patents Pending

• Up to 95 High Efficiency

• Up to 1.5A Guaranteed Output Current (ACT8311)

• 1.35MHz Constant Frequency Operation

• Internal Synchronous Rectifier Eliminates Schottky Diode

• ACT8309: Up to 900mA

• ACT8310: Up to 1.2A

• ACT8311: Up to 1.5A

• 100 Duty Cycle Low-Dropout Operation

• 0.1µA Shutdown Current

• Small TDFN33-8 Package − RoHS-Compliant

• Enable/Disable Control

• Minimal External Components

APPLICATIONS

• Wireless Handhelds

• Portable Devices

• GPS/PND equipment