GENERAL DESCRIPTION
ACT4533A/B is a wide input voltage, high efficiency ActiveCC step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4533A/B provides up to 3.5A output current at 125kHz switching frequency.

FEATURES
• 40V Input Voltage Surge
• 36V Steady State Operation
• Up to 3.5A output current
• Output Voltage up to 12V
• 125kHz Switching Frequency Eases EMI Design
• 91% Efficiency (Vout=5V@2.4A at Vin=12V)
• Stable with Low-ESR Ceramic Capacitors to Allow Low-Profile Designs
• Integrated Over Voltage Protection
• Excellent EMI Performance
• Patented ActiveCC Sensorless Constant Current Control Improves Efficiency and Lowers Cost.
• Resistor Programmable
    − Current Limit from 1.5A to 4.0A
    − Patented Cable Compensation from 0 to 0.25Ω
• ±7.5% CC Accuracy
    − Compensation of Input /Output Voltage Change
    − Temperature Compensation
    − Independent of inductance and Inductor DCR
• 2% Feedback Voltage Accuracy
• Advanced Feature Set
    − Integrated Soft Start
    − Thermal Shutdown
    − Secondary Cycle-by-Cycle Current Limit
    − Protection Against Shorted ISET Pin
• SOP-8EP Package

APPLICATIONS
• Car Charger/ Adaptor
• Rechargeable Portable Devices
• General-Purpose CV/CC Power Supply