Active-Semi Solutions for Sustainability
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?Product Features

  • Up to 40V Input Voltage
  • Up to 2A output current
  • Output Voltage up to 12V
  • 2% Feedback Voltage Accuracy
  • Up to 93% Efficiency
  • 210kHz Switching Frequency Eases EMI Design
  • Patent Pending Active CC Sensorless Constant Current Control
    ? Integrated Current Control Improves?Efficiency, Lowers Cost, and Reduces
    Component Count
  • Resistor Programmable
    ? Current Limit from 750mA to 2A
    ? Patented Cable Compensation from 0Ω to
  • ±7.5% CC Accuracy
    ? Compensation of Input /Output Voltage Change
    ? Temperature Compensation
    ? Independent of inductance and Inductor DCR
  • SOP-8EP Package1
  • Advanced Feature Set
    ? Integrated Soft Start
    ? Thermal Shutdown
    ? Secondary Cycle-by-Cycle Current Limit
    ? Protection Against Shorted ISET Pin


ACT4513 is a wide input voltage, high efficiency?Active CC step-down DC/DC converter that?operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4513 provides up to 2A output current at 210kHz switching frequency. Active CC is a patent-pending control scheme to achieve highest accuracy sensorless constant current control. Active CC eliminates the expensive, high accuracy current sense resistor, making it ideal for battery charging applications and adaptors with accurate current limit. The ACT4513 achieves higher efficiency than traditional constant current switching regulators by eliminating its associated power loss.
Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.

The ACT4513 is available in a SOP-8EP package and require very few external devices for operation.






  • Car Charger
  • Rechargeable Portable Device
  • General Purpose CC/CV Power Supply