ANP013

Application Note AP1509 150KHz, 2A PWM Buck DC/DC Converter Contents 1. Feature 2. Introduction 3. Regulator Design Procedure 4. Design example ANP013 Preliminary This application note contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev. A.0 MAR. 18, 2004 1/9 Application Note AP1509 150KHz, 2A PWM Buck DC/DC Converter ANP013 Preliminary 1.0 Features ◆ Small board size - Entire circuit can fit in less than 1 square inches of PCB space ◆ Low implementation cost - Fewer than 4 discrete components required ◆ ON /OFF control - Be controlled by external logic level signal ◆ Thermal shut-down and current limit - Built-in function ◆ Simply feedback compensation - Lead compensation using external capacitor ◆ Immediate implementation - Schematic, bill-of-materials and board layout available from Anachip 2.0 Introduction This application note discusses simple ways to select all necessary components to implement a step-down (BUCK) regulator and gives a design example. In this example, the AP1509 monolithic IC is used to design a cost-effective and high-efficiency miniature switching buck regulator. Please refer to the datasheet for more complete information, pin descriptions and specifications for the AP1509 will not be repeated here. This demonstration board allows the designer to evalua...