Microchip Technology SOT89-3 Manual de usuario

SOT89-3

Voltage Regulator

Evaluation Board

User’s Guide

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SOT89-3 VOLTAGE REGULATOR

EVALUATION BOARD USER’S GUIDE

Table of Contents

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

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

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

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

Recommended Reading........................................................................................3

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 SOT89-3 Voltage Regulator Evaluation Board? ..........................5

1.3 What the SOT89-3 Voltage Regulator Evaluation 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 ..........................................................................................13

A.4 Board – Top Solder ......................................................................................14

A.5 Board – Bottom Solder .................................................................................15

Appendix B. Bill Of Materials (BOM)

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

SOT89-3 Voltage Regulator Evaluation Board User’s Guide

NOTES:

SOT89-3 VOLTAGE REGULATOR

EVALUATION BOARD USER’S GUIDE

Preface

INTRODUCTION

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

SOT89-3 Voltage Regulator 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 SOT89-3 Voltage Regulator Evaluation

Board. The manual layout is as follows:

•Chapter 1. “Product Overview” – Important information about the SOT89-3

Voltage Regulator Evaluation 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 SOT89-3 Voltage Regulator Evaluation Board.

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

SOT89-3 Voltage Regulator Evaluation 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.

SOT89-3 Voltage Regulator Evaluation Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

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

N‘Rnnnn A number in verilog format,

where N is the total number of

digits, R is the radix and n is a

digit.

4‘b0010, 2‘hF1

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

Courier New font:

Plain Courier New 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

Constants 0xFF, ‘A’

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

any valid filename

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

RECOMMENDED READING

This user's guide describes how to use SOT89-3 Voltage Regulator Evaluation Board.

Other useful documents are listed below. The following Microchip documents are

available and recommended as supplemental reference resources.

MCP1700A Datasheet, “Low Quiescent Current LDO”, DS22069

MCP1701A Datasheet, “2 μA Low-Dropout Positive Voltage Regulator”, DS21991

MCP1702 Datasheet, “250 mA Low Quiescent Current LDO Regulator”, DS22008

MCP1703 Datasheet, “250 mA, 16V, Low Quiescent Current LDO Regulator”,

DS22049

These datasheets provide useful information regarding voltage regulator parameters

that may be validated using this evaluation board.

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

(FAE) 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.

DOCUMENT REVISION HISTORY

Revision A (February 2009)

• Initial Release of this Document.

SOT89-3 Voltage Regulator Evaluation Board User’s Guide

NOTES:

SOT89-3 VOLTAGE REGULATOR

EVALUATION BOARD USER’S GUIDE

Chapter 1. Product Overview

1.1 INTRODUCTION

The SOT89-3 Voltage Regulator Evaluation Board is designed to provide functional

evaluation of Microchip Voltage Regulators that utilize the SOT89-3 package and the

following device pinouts:

The SOT89-3 Voltage Regulator Evaluation Board does not come with a voltage

regulator soldered onto the board. This allows the user to attach the voltage regulator

of their choosing to the board and perform quiescent current, ground current, PSRR,

and other desired tests.

The SOT89-3 Voltage Regulator Evaluation Board is based upon a modular concept

which will allow the user to plug in additional boards to increase the test capability of

the voltage regulator. Planned additional modular plug-in boards currently consist of an

Input Voltage Linestep Board, Output Voltage Loadstep Board, and several other

device packages.

1.2 WHAT IS THE SOT89-3 VOLTAGE REGULATOR EVALUATION BOARD?

The SOT89-3 Voltage Regulator Evaluation Board is designed to evaluate and test

voltage regulators. By soldering the desired device to the evaluation board, the user

can easily validate several parameters of the device.

1.2.1 Functional Blocks

The SOT89-3 Voltage Regulator Evaluation Board can be broken up into 3 functional

blocks. The blocks are:

• Input Capacitance

• Ground Current Measurement

• Load Resistor

1.2.2 Input Capacitance

Jumper JP1 connects the input capacitance to the circuit. The input capacitor is

disconnected when performing Power Supply Ripple Rejection tests. By default, C1 is

populated with a 1 µF, 50V, XR7 ceramic capacitor.

1.2.3 Ground Current Measurement

Jumper JP3 allows measurement of ground current. When a current meter is

connected to TP6 and TP7 and jumper JP3 is removed, the ground current of the

device may be measured.

Pin No. U2 footprint U1 footprint

Pin 1 VIN GND

Pin 2 GND VIN

Pin 3 VOUT VOUT

SOT89-3 Voltage Regulator Evaluation Board User’s Guide

1.2.4 Load Resistor

R5 may be populated with the desired load resistor value for the device being

evaluated. JP4 connects R5 to the device output.

1.2.5 Output Capacitor

C2 may be populated with the desired surface mount output capacitance. By default,

C2 is populated with a 1 µF, 6.3V, XR7 ceramic capacitor.

1.2.6 Power Supply

J1 or TP1 and TP2 are connected to the user’s power supply.

1.2.7 Device Selection

JP2 and JP5 select either device U1 or device U2. Placing the jumper on pins 1-2 of

JP2 and JP5 selects the device at U2. Placing the jumper on pins 2-3 of JP2 and JP5

selects the device at U1.

1.3 WHAT THE SOT89-3 VOLTAGE REGULATOR EVALUATION BOARD KIT

INCLUDES

This SOT89-3 Voltage Regulator Evaluation Board kit includes:

• SOT89-3 Voltage Regulator Evaluation Board, 102-00213, (Qty 2)

• Microchip Analog and Interface Products Demonstration Boards CD-ROM

Includes: (DS21912)

- SOT89-3 Voltage Regulator Evaluation Board User’s Guide, DS51796

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