MIC2128 EVALUATION BOARD
USER’S GUIDE
2016 Microchip Technology Inc. DS50002533A-page 5
Table of Contents
Preface ........................................................................................................................... 7
Introduction............................................................................................................ 7
Document Layout .................................................................................................. 7
Conventions Used in this Guide ............................................................................ 8
Warranty Registration............................................................................................ 8
Recommended Reading........................................................................................ 9
The Microchip Website.......................................................................................... 9
Product Change Notification Service..................................................................... 9
Customer Support ................................................................................................. 9
Document Revision History ................................................................................... 9
Chapter 1. Product Overview
1.1 Introduction ................................................................................................... 11
1.2 MIC2128 Evaluation Board Overview .......................................................... 11
1.3 MIC2128 Evaluation Board Features ........................................................... 12
1.4 What the MIC2128 Evaluation Board Kit Contains ....................................... 12
Chapter 2. Installation and Operation
2.1 System and Configuration Requirements ..................................................... 13
2.2 Board Setup ................................................................................................. 13
2.3 Circuit Description ........................................................................................ 14
2.3.1 Feedback Resistors ................................................................................... 14
2.3.2 SW Node ................................................................................................... 14
2.3.3 Current Limit .............................................................................................. 14
2.3.4 Loop Gain Measurement ........................................................................... 16
2.3.5 Setting the Switching Frequency ............................................................... 16
2.3.6 Setting the Soft-Start Time ........................................................................ 17
2.3.7 Auxiliary Bootstrap LDO (EXTVDD) .......................................................... 18
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 19
A.2 Board – Schematic ....................................................................................... 20
A.3 Board – Top Silk Layer ................................................................................ 21
A.4 Board – Top Copper layer ............................................................................ 22
A.5 Board – Mid Copper Layer 1 ........................................................................ 23
A.6 Board – Mid Copper Layer 2 ........................................................................ 24
A.7 Board – Bottom Copper layer ...................................................................... 25
A.8 Board – Bottom Silk Layer ........................................................................... 26
Appendix B. Bill of Materials (BOM)........................................................................... 27
Worldwide Sales and Service .................................................................................... 30
