EM5303

CYStech Electronics Corp. Spec. No. : C551QP Issued Date : 2010.10.25 Revised Date : Page No. : 1/12 5V/12V Synchronous Buck PWM Controller EM5303/A General Description EM5303/A is a synchronous rectified PWM controller operating with 5V or 12V supply voltage. This device operates at 200/300 kHz and provides an optimal level of integration to reduce size and cost of the power supply. This part includes internal soft start, internal compensation networks, over current protection, under voltage protection, and shutdown function. This part is available in PSOP-8 package. Features z z z z z z z z z z z Operate from 5V to 12V Voltage Supply 0.6V VREF with 1.5% Accuracy Voltage Mode PWM Control 200kHz or 300kHz Fixed Frequency Oscillator 0% to 80% Duty Cycle Internal Soft Start Over Current Protection Integrated Bootstrap Diode Adaptive Non-Overlapping Gate Driver Under Voltage Protection Over Voltage Protection Applications z z z Notebook & Netbook Graphic Cards & MB Low Voltage Logic Supplies Ordering Information Part Number EM5303QP EM5303AQP Package PSOP-8 PSOP-8 Frequency 200kHz 300kHz EM5303QP CYStek Product Specification http://www.Datasheet4U.com CYStech Electronics Corp. Pin Configuration Spec. No. : C551QP Issued Date : 2010.10.25 Revised Date : Page No. : 2/12 Typical Application Circuit Pin Assignment Pin Pin No. Name BOOT 1 Pin Function Bootstrap Supply for the floating upper gate driver. Connect the bootstrap capacitor C BOOT between BOOT pin and the PHASE...