ANP007
Application Note
AP2001 Dual Buck Converter

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 Feb. 20, 2003
1/11

Contents

1. AP2001 Specification
1.1 Features
1.2 General Description
1.3 Pin Assignments
1.4 Pin Descriptions
1.5 Block Diagram
1.6 Absolute Maximum Ratings
2. Hardware
2.1 Introduction
2.2 Typical Application
2.3 Input / Output Connections
2.4 Schematic
2.5 Bill of Material
2.6 Board Layout
3. Design Procedure
3.1 Introduction
3.2 Operating Specifications
3.3 Design Procedures
3.3.1 Selection of the buck inductor (L)
3.3.2 Selection of the output capacitor (Cout)
3.3.3 Selection of power switch (MOSFET)
3.3.4 Selection of power Rectifier (D)
3.3.5 Selection of the input capacitor (Cin)
4. Voltage monitor by AP434