ACT  -  系列元器件数据手册
ACT4072  -  Wide Input 2A Step Down Converter  -  Active Semi  -  直流-直流

FEATURES
• 2A Output Current
• Up to 95% Efficiency
• Up to 30V Input Range
• 6μA Shutdown Supply Current
• 420kHz Switching Frequency
• Adjustable Output Voltage
• Cycle-by-Cycle Current Limit Protection
• Thermal Shutdown Protection
• Frequency Fold-Back at Short Circuit
• Stability with Wide Range of Capacitors, Including Low ESR Ceramic Capacitors
• SOP-8 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
GENERAL DESCRIPTION
The ACT4072 is a current-mode step-down DC/DC converter that generates up to 2A output current at 420kHz switching frequency. The device utilizes Active-Semi’s proprietary ISOBCD30 process for operation with input voltage up to 30V.
Consuming only 6μA in shutdown mode, the ACT4072 is highly efficient with peak efficiency at 95% when in operation. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency fold-back at short circuit.
The ACT4072 is available in SOP-8 package and requires very few external devices for operation.