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