Microchip Technology TC1303 DFN Manual de usuario

TC1303 DFN

Adjustable Output

Demo Board

User’s Guide

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TC1303 DFN ADJUSTABLE OUTPUT

DEMO BOARD USER’S GUIDE

Table of Contents

Preface ........................................................................................................................... 1

Introduction............................................................................................................ 1

Document Layout .................................................................................................. 1

Conventions Used in this Guide ............................................................................ 2

Recommended Reading........................................................................................ 2

The Microchip Web Site ........................................................................................ 3

Customer Support ................................................................................................. 3

Document Revision History ................................................................................... 3

Chapter 1. Product Overview

1.1 Introduction ..................................................................................................... 5

1.2 What is the TC1303 DFN Adjustable Output Demo Board? .......................... 6

1.3 What the TC1303 DFN Adjustable Output Demo Board Kit includes ............. 6

Chapter 2. Installation and Operation

2.1 Introduction ..................................................................................................... 7

2.2 Features ......................................................................................................... 7

2.3 Getting Started ............................................................................................... 7

Appendix A. Schematic and Layouts

A.1 Introduction .................................................................................................. 11

A.2 Board – Schematic ..................................................................................... 12

A.3 Board – Top Silk Screen Layer .................................................................. 13

A.4 Board – Top Metal Layer ............................................................................ 14

A.5 Board – Bottom Metal Layer ...................................................................... 15

Appendix B. Bill Of Materials (BOM)

Worldwide Sales and Service .................................................................................... 18

TC1303 DFN Adjustable Output Demo Board User’s Guide

NOTES:

TC1303 DFN ADJUSTABLE OUTPUT

DEMO BOARD USER’S GUIDE

Preface

INTRODUCTION

This chapter contains general information that will be useful to know before using the

TC1303 DFN Adjustable Output Demo 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 TC1303 DFN Adjustable Output Demo Board

. The manual layout is as follows:

•Chapter 1. “Product Overview” – Important information about the TC1303 DFN

Adjustable Output Demo Board .

•Chapter 2. “Installation and Operation” – Includes instructions on how to get

started with this user’s guide and a description of the user’s guide.

•Appendix A. “Schematic and Layouts” – Shows the schematic and layout

diagrams for the TC1303 DFN Adjustable Output Demo Board .

•Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the

TC1303 DFN Adjustable Output Demo Board .

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 page 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®IDE on-line help.

Select the Help menu, and then Topics to open a list of available on-line help files.

TC1303 DFN Adjustable Output Demo Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

RECOMMENDED READING

This user's guide describes how to use TC1303 DFN Adjustable Output Demo Board.

The following Microchip documents are available and recommended as supplemental

reference resources.

TC1303A/TC1303B/TC1303C Data Sheet, "500mA Synchronous Buck Regulator,

+ 300mA LDO with Power-Good Output" (DS21949)

This data sheet provides detailed information regarding the TC1303 product family.

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB®IDE User’s Guide

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

“Save project before build”

Underlined, italic text with

right angle bracket

A menu path File>Save

Bold characters A dialog button Click OK

A tab Click the Power tab

‘bnnnn A binary number where nis a

digit

‘b00100, ‘b10

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

Courier font:

Plain Courier Sample source code #define START

Filenames autoexec.bat

File paths c:\mcc18\h

Keywords _asm, _endasm, static

Command-line options -Opa+, -Opa-

Bit values 0, 1

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

any valid filename

0xnnnn A hexadecimal number where

nis a hexadecimal digit

0xFFFF, 0x007A

Square brackets [ ] Optional arguments mcc18 [options] file

[options]

Curly brackets and pipe

character: { | }

Choice of mutually exclusive

arguments; an OR selection

errorlevel {0|1}

Ellipses... Replaces repeated text var_name [,

var_name...]

Represents code supplied by

user

void main (void)

{ ...

}

Preface

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at www.microchip.com. This web

site is used as a means to make files and information easily available to customers.

Accessible by using your favorite Internet browser, the web site contains the following

information:

•Product Support – Data sheets and errata, application notes and sample

programs, design resources, user’s guides and hardware support documents,

latest software releases and archived software

•General Technical Support – Frequently Asked Questions (FAQs), technical

support requests, online discussion groups, Microchip consultant program

member listing

•Business of Microchip – Product selector and ordering guides, latest Microchip

press releases, listing of seminars and events, listings of Microchip sales offices,

distributors and factory representatives

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

• Development Systems Information Line

Customers should contact their distributor, representative or field application engineer

for support. Local sales offices are also available to help customers. A listing of sales

offices and locations is included in the back of this document.

Technical support is available through the web site at: http://support.microchip.com

In addition, there is a Development Systems Information Line which lists the latest

versions of Microchip's development systems software products. This line also pro-

vides information on how customers can receive currently available upgrade kits.

The Development Systems Information Line numbers are:

1-800-755-2345 – United States and most of Canada

1-480-792-7302 – Other International Locations

DOCUMENT REVISION HISTORY

Revision A (July 2006)

• Initial Release of this Document.

TC1303 DFN Adjustable Output Demo Board User’s Guide

NOTES:

TC1303 DFN ADJUSTABLE OUTPUT

DEMO BOARD USER’S GUIDE

Chapter 1. Product Overview

1.1 INTRODUCTION

Step-down-converter choices include a variety of linear and switching regulators. The

TC1303C Adjustable Output Regulator provides a unique combination of a 500 mA

synchronous buck regulator and 300 mA Low-Dropout Regulator (LDO) with a

Power-Good (PG) monitor to provide a highly integrated solution of dual supply

applications for devices like Cellular Phones, Portable Computers, USB-Powered

Devices, Hand Held instruments, etc. The device provides a very cost-effective solution

with minimal board space because of the high-frequency operation of the buck

converter, which reduces the size requirements of the external inductor and capacitor,

the minimal external component requirement by the LDO and the small DFN (dual flat

no leads) package size.

The 500 mA synchronous buck regulator switches at a fixed frequency of 2.0 MHz

when the load is heavy, providing a low-noise, small-size solution. When the load on

the buck output is reduced to light levels, it changes operation to a pulse frequency

modulation (PFM) mode to minimize quiescent current drawn from the battery. No inter-

vention is necessary for smooth transition from one mode to another.

The LDO provides a 300 mA auxiliary output that requires a single 1 µF ceramic output

capacitor, minimizing board area and cost. Typical dropout voltage for the LDO output

is 137 mV for a 200 mA load.

For the TC1303C, the power-good output is based on the regulation of the buck regu-

lator output, the LDO output or the combination of both. Additional protection features

include UVLO, overtemperature and overcurrent protection on both outputs.

This chapter covers the following topics.

• What is the TC1303 DFN Adjustable Output Demo Board?

• What the TC1303 DFN Adjustable Output Demo Board Kit includes.

FIGURE 1-1: TC1303 DFN Adjustable Output Demo Board Block Diagram.

INPUT VOLTAGE:

2.7V - 5.5V

Resistor Divider

Network

LDO Regulator

Output Voltage

2.5V @300 mA

Switch S1 for

SHDN1 and SHDN2

TC1303C

500mA Synchronous Buck

Regulator + 300mA LDO

with Power-Good Output

Buck Regulator

Output Voltage

1.8V,2.5V,3.3V,

4.0V @500 mA

TC1303 DFN Adjustable Output Demo Board User’s Guide

1.2 WHAT IS THE TC1303 DFN ADJUSTABLE OUTPUT DEMO BOARD?

The TC1303 DFN Adjustable Output demo board demonstrates the use of Microchip’s

TC1303C device in applications that require dual supply voltage.The demo board is

used to evaluate the TC1303C device over the input voltage range, output voltage and

current range for both the synchronous buck regulator output and the low dropout linear

regulator output.

Test points are provided to monitor the Input voltage, Output voltage, shut down control

and power good signal.

1.3 WHAT THE TC1303 DFN ADJUSTABLE OUTPUT DEMO BOARD KIT

INCLUDES

This TC1303 DFN Adjustable Output Demo Board kit includes:

• TC1303 DFN Adjustable Output Demo Board (102-00092)

• TC1303 DFN Adjustable Output Demo Board User’s Guide

(Electronic version on CD-ROM)

• Analog and Interface Products Demonstration Boards CD-ROM (DS21912)

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