Microchip Technology MCP19035 User Manual

MCP19035

300 kHz Synchronous

Buck Controller

Evaluation Board

User’s Guide

 2012 Microchip Technology Inc. DS52099A

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== ISO/TS 16949 ==

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Information contained in this publication regarding device applications and t he lik e is provided only for your convenience and may be su perseded by upda t es . It is y our responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life supp ort and/or safety ap plications is entir ely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless M icrochip from any and all dama ges, claims, suits, or expenses re sulting from such use. No licens es are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.

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QUALITY MANAGEMENT S

DS52099A-page 2  2012 Microchip Technology Inc.

Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified.

MCUs and dsPIC® DSCs, KEELOQ

code hopping

MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide

Object of Declaration: MCP19035 300 kHz Syn chronous Buc k Contr oller Eva luati on Board

 2012 Microchip Technology Inc. DS52099A-page 3

MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide

NOTES:

 2012 Microchip Technology Inc. DS52099A-page 4

MCP19035 300 KHZ SYNCHRONOUS

BUCK CONTROLLER EVALUATION

BOARD USER’S GUIDE

Preface ...........................................................................................................................7

Introduction............................................................................................................7

Document Layout .................................................................................................. 7

Conventions Used in this Guide............................................................................ 8

Recommended Reading.............................................................. .. ........................9

The Microchip Web Site........................................................................................ 9

Customer Support....................... ....................................................... ...................9

Document Revision History................................................................................... 9

Chapter 1. Product Overview

1.1 Introduction ...................................................................................................11

1.2 MCP19035 Short Overview ..........................................................................11

1.3 What Is the MCP19035 300 kHz Synchronous Buck Controller

Evaluation Bo a rd ? ......... ....................................................... .................. 12

1.4 What the MCP19035 300 kHz Synchronous Buck Control ler

Evaluation Bo a rd K it C o n ta in s ............. .. .......................................... ....... 12

Chapter 2. Installation and Operation

2.1 Introduction ...................................................................................................13

2.2 Getting Sta rted ............................................................................................. 13

2.2.1 Necessary Instruments and Tools .............................................................13

2.2.2 Setup Procedure .......................................................................................13

2.2.3 Board Testing ............................................................................................14

Appendix A. Schematic and Layouts

A.1 Introduction ..................................................................................................17

A.2 Board – Schematic ... .................................................................... ................ 18

A.3 Board – Top Silk and Pads ..........................................................................19

A.4 Board – Top Copper and Silk .......................................................................20

A.5 Board – Top Copper ....................................................................................21

A.6 Board – Mid La ye r 1 ....... ................ .............................................................. 22

A.7 Board – Mid La ye r 2 ....... ................ .............................................................. 23

A.8 Board – Bottom Copper and Pads ...............................................................24

A.9 Board – Bottom Copper, Silk and Pads .......................................................25

Appendix B. Bill of Materials Appendix C. Typical Performance Data, Curves and Waveforms

C.1 Introduction ..................................................................................................29

Worldwide Sales and Service ....................................................................................36

 2012 Microchip Technology Inc. DS52099A-page 5

MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide

DS52099A-page 6  2012 Microchip Technology Inc.

MCP19035 300 KHZ SYNCHRONOUS

BUCK CONTROLLER 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. This number is located on the bottom of each page, in front of the p age number. The numbering convention for the DS number is “DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the document.

For the most up-to-date information on development tools, see the MPLAB Select the Help menu, and then Topics to open a list of available online help files.

IDE online help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board. Items discussed in this chapter include:

• Document Layout

• Conventions Used in this Guide

• Recommended Reading

• The Microchip Web Site

• Customer Support

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board as a development tool to emulate and debug firmware on a target board. The manual layout is as follows:

• Chapter 1. “Product Overview” – Shows a brief description of the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board

• Chapter 2. “Installation and Operation” – Includes instructions on how to get started with the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board

• Appendix A. “Schematic and Layouts” – Shows the schematic and layout diagrams for the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board

• Appendix B. “Bill of Materials” – Lists the parts used to build the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board

• Appendix C. “Typical Performance Data, Curves and Waveforms” – Shows the typical performance graphs

 2012 Microchip Technology Inc. DS52099A-page 7

MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following docum entat io n conven tion s:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic chara c ters Referenced books MPLAB

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog A menu selection select Enable Programmer

Quotes A field name in a window or

dialog

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brac kets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe character: { | }

Ellipses... Replaces r epeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the tota l number of digits, R is th e radi x and n is a digit.

Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’

Choice of mut ually exclus ive arguments; an OR selection

Represents code supplied by user

“Save project before build”

4‘b0010, 2‘hF1

any valid filename

[options] errorlevel {0|1}

var_name...] void main (void)

{ ... }

IDE User’s Guide

DS52099A-page 8  2012 Microchip Technology Inc.

DOCUMENT REVISION HISTORY

Revision A (November 2012)

• Initial Release of this Document.

 2012 Microchip Technology Inc. DS52099 A-page 9

MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide

NOTES:

DS52099A-page 10  2012 Microchip Technology Inc.

MCP19035 300 KHZ SYNCHRONOUS

BUCK CONTROLLER EVALUATION

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board, and covers the following topics:

• Short Overview: MCP19035

• What Is the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board?

• What the MCP19035 300 kHz Synchronous Buck Controller Evaluation Board Kit Contains

1.2 SHORT OVERVIEW: MCP19035

The MCP19035 is a highly-featured, highly-integrated, Synchronous Buck Controller in a space-saving 10-pin DFN 3 x 3 mm package, that operates from input voltage sources up to 30V. Integrated features include high and low-side MOSFET drivers, fixed-frequency voltage mode control, internal oscillator and reference voltage generator, overcurrent protection on both the high- and low-side devices, Power Good circuit and overtemperature protection. A minimal number of external components are necessary to develop a complete, high-performance Synchronous Buck Converter power supply.

The MCP19035 Synchronous Buck Controller is intended to be used for applications requiring medium to high-output currents (up to 20A) and input voltages up to 30V.

Typical applications include:

• Medium current Point-of-Load converters

• FPGA/DSP power supplies

• Digital Set-Top boxes

• Industrial 24V rails converters

The internal linear voltage regulator (LDO) allows low current loads (for example, PIC microcontrollers) to be powered directly from this controller without any additional components.

BOARD USER’S GUIDE

 2012 Microchip Technology Inc. DS52099A-page 11

MCP19035 300 kHz Synchronous Buck Controller Evaluation Board User’s Guide

OUT

MCP19035

HDRV

LDRV

PHASE

BOOT

VCC

OUT

SHDN

PWRGD

COMP

OFF

GND

FIGURE 1-1: Typical Application.

1.3 WHAT IS THE MCP19035 300 KHZ SYNCHRONOUS BUCK CONTROLLER EVALUATION BOARD?

The MCP19035 300 kHz Synchronous Buck Controller Evaluation Board is a compact, highly efficient, step-down voltage regulator that will convert the input voltage rail (typically 12V) to 1.8V regulated output voltage. The maximum output current for this step-down converter is 15A. The board demonstrates the capabilities of the MCP19035 300 kHz synchronous buck converter, as well as Microchip’s high-performance power MOSFET transistors. Test points for various signals are provided for measuring different parameters of the converter. The evaluation board can be modified to support output voltages from 0.9V to 3.3V by changing a single resistor.

1.4 WHAT THE MCP19035 30 0 KHZ SYNCHRONOUS BUCK CONTROLLER EVALUATION BOARD KIT CONTAINS

The MCP19035 300 kHz Synchronous Buck Controller Evaluation Board kit includes:

• MCP19035 300 kHz Synchronous Buck Controller Evaluation Board (ADM00434)

• Important Information Sheet

DS52099A-page 12  2012 Microchip Technology Inc.

+ 25 hidden pages

Microchip Technology MCP19035 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Trademarks

Table of Contents

Preface

DOCUMENT REVISION HISTORY

Chapter 1. Product Overview

1.1 INTRODUCTION

1.2 SHORT OVERVIEW: MCP19035

1.3 WHAT IS THE MCP19035 300 KHZ SYNCHRONOUS BUCK CONTROLLER EVALUATION BOARD?

1.4 WHAT THE MCP19035 30 0 KHZ SYNCHRONOUS BUCK CONTROLLER EVALUATION BOARD KIT CONTAINS