GENERAL DESCRIPTION

ACT4070B is a wide input voltage step-down DC/DC converter that provides up to 3A output current at 300kHz switching frequency. ACT4070B is a replacement part for ACT4070 with advanced features such as lower standby current and higher light load efficiency. ACT4070B can be dropped into ACT4070 socket with only feedback resistance value changed.

FEATURES

• 3A Output Current

• Up to 95 Efficiency

• 6.5V to 30V Input Range

• 100µA Shutdown Supply Current

• 4mA Standby Input Current

• 300kHz Switching Frequency

• Output Voltage Up to 12V

• Cycle-by-Cycle Current Limit Protection

• Thermal Shutdown Protection

• Internal Soft Start Function

• Frequency Fold Back at Short Circuit

• Stability with Wide Range of Capacitors

• Including Low ESR Ceramic Capacitors

• SOP-8/EP (Exposed Pad) Package

APPLICATIONS

• TFT LCD Monitors or Televisions and HDTV

• Portable DVD Players

• Car-Powered or Battery-Powered Equipment

• Set-Top Boxes

• Telecom Power Supplies

• DSL and Cable Modems and Routers