GENERAL DESCRIPTION

ACT4523A 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. ACT4523A provides up to 3.5A output current at 250kHz switching frequency.

FEATURES

• 40V Input Voltage Surge

• 36V Steady State Operation

• Up to 3.5A Output Current

• Output Voltage up to 12V

• 250kHz Switching Frequency

• 91 Efficiency (Vout = 5V@3.5A at Vin = 12V)

• Patented ActiveCC Sensorless Constant Current Control

    − Integrated Current Control Improves Efficiency, Lowers Cost, and Reduces Component Count

• Resistor Programmable

    − Current Limit from 1.5A to 4.0A

    − Patented Cable Compensation from 0 to 0.25Ω

• ±6.5 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 CC/CV Supply