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ACT4065SH Datasheet(PDF) 1 Page - Active-Semi, Inc |
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ACT4065SH Datasheet(HTML) 1 Page - Active-Semi, Inc |
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1 / 9 page  ACT4065 High Input 2A Step Down Converter FEATURES 2A Output Current Up to 95% Efficiency Up to 28V Input Range 8µA Shutdown Supply Current 200kHz Switching Frequency Adjustable Output Voltage Cycle-by-Cycle Current Limit Protection Thermal Shutdown Protection Frequency Foldback at Short Circuit Stability with Wide Range of Capacitors, Including Low ESR Ceramic Capacitors SOP-8 Package APPLICATIONS TFT LCD Monitors Portable DVDs Car-Powered or Battery-Powered Equipments Set-Top Boxes Telecom Power Supplies DSL and Cable Modems and Routers Termination Supplies GENERAL DESCRIPTION The ACT4065 is a current-mode step-down DC-DC converter that generates up to 2A output current at 200kHz switching frequency. The device utilizes Active-Semi’s proprietary ISOBCD30 process for operation with input voltage up to 28V. Consuming only 8μA in shutdown mode, the ACT4065 is highly efficient with peak efficiency at 95% when in operation. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit. The ACT4065 is available in SOP-8 package and requires very few external devices for operation. Active-Semi, Inc. - 1 - www.active-semi.com Data Sheet Rev 2, 6/2006 Figure 1. Typical Application Circuit ACT4065 IN BS EN FB G COMP SW + 8.5V to 28V ENABLE 5V/1.7A 5V/2A (<23V INPUT) 5V/1.7A (>23V INPUT) |
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