AT2003

AT2003 Wide Input sensorless CC/CV 2A Buck Converter General Description AT2003 is a wide input voltage, high efficiency stepdown DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. AT2003 provides up to 3A output current at 120kHz switching frequency ,and the CC level can be adjusted by changing external sensing resister. The AT2003 provides full protection functions, thermal shutdown is to prevent over temperature operating from damage; cycle by cycle current limit is against over current operating of the switch; and over voltage protection (OVP) that can avoid high Vout voltage to damage circuit and capacitor. The devices is available in PSOP8-8L package and require very few external devices for operation. Features  Wide Input Voltage with 9V ~ 40V Operation  Up to 3A Output Current  Fixed Frequency 120 kHz with Easy EMI Control  Constant voltage and constant voltage control  Precision Feedback Voltage 1.2V+-1%  Precision CC Limit with +-5% Accuracy  Integrated 140mohm High Side NMOS  Internal MOS 4.5A Current Peak Protected in Cycle by Cycle Current Limit  PSOP8-8 Package Applications   Car Charger/Adaptor General-Purposed DC/DC Converters with Ordering and Marking Information Constant Current Limit Order Number Package Top Marking  Rechargeable Portable Devices AT2003SSP8 PSOP-8L AT2003S Pin Configuration Note: Aplustek products are compatible with the current IPC/JEDEC J-STD-020 requi...