MCP16321 Evaluation Board User’s Guide 2011 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
MCP16321 EVALUATION BOARD USER’S GUIDE Table of Contents Preface ........................................................................................................................... 5 Introduction............................................................................................................ 5 Document Layout .................................................................................................. 5 Conventions Used in this Guide ..................................................
MCP16321 Evaluation Board User’s Guide NOTES: DS52024A-page 4 2011 Microchip Technology Inc.
MCP16321 EVALUATION BOARD USER’S GUIDE Preface NOTICE TO CUSTOMERS All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our web site (www.microchip.com) to obtain the latest documentation available. Documents are identified with a “DS” number.
MCP16321 Evaluation Board User’s Guide CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Arial font: Italic characters Initial caps Quotes Underlined, italic text with right angle bracket Bold characters N‘Rnnnn Text in angle brackets < > Courier New font: Plain Courier New Represents Referenced books Emphasized text A window A dialog A menu selection A field name in a window or dialog A menu path MPLAB® IDE User’s Guide ...
Preface RECOMMENDED READING This user's guide describes how to use MCP16321 Evaluation Board. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. • MCP16321/2 Data Sheet – “24V Input, 1A/2A Output, High Efficiency Synchronous Buck Regulator with Power Good Indication” (DS22285) THE MICROCHIP WEB SITE Microchip provides online support via our web site at www.microchip.com.
MCP16321 Evaluation Board User’s Guide NOTES: DS52024A-page 8 2011 Microchip Technology Inc.
MCP16321 EVALUATION BOARD USER’S GUIDE Chapter 1. Product Overview 1.1 INTRODUCTION This chapter provides an overview of the MCP16321 Evaluation Board and covers the following topics: • MCP16321 Short Overview • What is the MCP16321 Evaluation Board? • MCP16321 Evaluation Board kit contents 1.
MCP16321 Evaluation Board User’s Guide Pgood 10k CBOOST 22 nF VIN 6.0V to 24V CIN 2 x 10 μF PG VIN 1.3 10 MCP16321 EN VOUT 3.0V @ 1A SW INJ EN COUT 2 x 22 μF V FBFB SGND FIGURE 1-1: L1 4.7 μH BOOST PGND 10k 23.2k Typical MCP16321 Buck Application. WHAT IS THE MCP16321 EVALUATION BOARD? The MCP16321 Evaluation Board is designed to operate from a 6V to 24V input and regulate the output to 3.0V.
MCP16321 EVALUATION BOARD USER’S GUIDE Chapter 2. Installation and Operation 2.1 INTRODUCTION 2.1.1 MCP16321 Features The MCP16321 devices have been developed to provide high input voltage, high current applications with a precisely regulated rail while operating at high efficiency. The key features of the MCP16321 include: • • • • • • • • • • • • • • • • • • • • • Up to 95% Typical Efficiency for 5V Output Applications Input Voltage Range: 6.0V to 24V Output Voltage Range: 0.
MCP16321 Evaluation Board User’s Guide A copper via, labeled PGD, connected to the power good pin on the device, can be populated to monitor the power good output of the device. The power good pin is externally pulled up to VOUT with a 10 kΩ resistor (R2).The power good output pin should not be pulled to a voltage higher than 6.0V. A copper via, labeled INJ, connected between the 10Ω injection resistor (R1) and the RTOP resistor can be populated to allow a convenient injection point for stability analysis.
MCP16321 EVALUATION BOARD USER’S GUIDE Appendix A. Schematic and Layouts A.1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP16321 Evaluation Board: • • • • Board – Schematic Board – Top Layer Board – Top Copper Layer Board – Bottom Copper Layer 2011 Microchip Technology Inc.
V in 2 GND GND 1 C2 10u 2 DNP GND 1 C3 10u GND DNP Enable 4 15 14 17 9 6 7 2 3 11 MC P16321/2 Sgnd Pgnd Pgnd Pgnd (Pad) EN NC NC V in V in V in U1 FB PG SW SW SW SW BO OST 1 5 8 DNP Pgood 1 12 13 16 10 10k R2 22n C1 2 1 DNP SW V out 4.7u L1 DNP IN J 2 GND Rbot 10k Rtop 36.5k R1 10 1 2 DS52024A-page 14 C4 22u V out 1 GND C5 22u DNP GND DNP V out GND V out A.
Schematic and Layouts A.3 BOARD – TOP LAYER A.4 BOARD – TOP COPPER 2011 Microchip Technology Inc.
MCP16321 Evaluation Board User’s Guide A.5 BOARD – BOTTOM COPPER DS52024A-page 16 2011 Microchip Technology Inc.
MCP16321 EVALUATION BOARD USER’S GUIDE Appendix B. Bill of Materials TABLE B-1: Qty BILL OF MATERIALS (BOM) Reference Description AVX Corporation Part Number C1 2 C2, C3 CAP 10uF 35V CERAMIC X7R 1210 20% Taiyo Yuden GMK325AB7106MM-T 2 C4, C5 CAP 22uF 6.3V CERAMIC X7R 1206 10% Murata GCM31CR70J226KE23L 1 L1 XFL4020 4.7uH Shielded Power Inductor Coilcraft XFL4020-472MEB 1 PCB MCP16321 6V to 24V VIN, 3.3V Printed Circuit Board Microchip Technology Inc. 104-00414 1 R1 RES 10.
Worldwide Sales and Service AMERICAS ASIA/PACIFIC ASIA/PACIFIC EUROPE Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://www.microchip.com/ support Web Address: www.microchip.
