Microchip Technology TO220-3 Voltage Regulator Evaluation Board, TO263-3 Voltage Regulator Evaluation Board User guide

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TO220-3/TO263-3

Voltage Regulator

Evaluation Board

User’s Guide

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TO220-3/TO263-3 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 TO220-3/TO263-3 Voltage Regulator Evaluation Board? ........... 5

1.3 What the TO220-3/TO263-3 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 .................................................................................................... 9

A.2 Board - Schematic ....................................................................................... 10

A.3 Board - Top Silk ........................................................................................... 11

A.4 Board - Top Copper ..................................................................................... 12

A.5 Board - Bottom Copper ................................................................................ 13

Appendix B. Bill of Materials (BOM)

Worldwide Sales and Service .................................................................................... 16

TO220-3/TO263-3 Voltage Regulator Evaluation Board User’s Guide

NOTES:

TO220-3/TO263-3 VOLTAGE REGULATOR

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

IDE on-line help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the TO220-3/TO263-3 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 TO220-3/TO263-3 Voltage Regulator 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” – Contains information about the

TO220-3/TO263-3 Voltage Regulator Evaluation Board.

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

started with this evaluation board and a description of the evaluation board operation.

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

diagrams for the TO220-3/TO263-3 Voltage Regulator Evaluation Board.

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

TO220-3/TO263-3 Voltage Regulator Evaluation Board.

TO220-3/TO263-3 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

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brackets < > 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 repeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the total number of digits, R is the radix 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 mutually exclusive 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)

{ ... }

Chapter 1. Product Overview

1.1 INTRODUCTION

The TO220-3 / TO263-3 Voltage Regulator Evaluation Board is designed to provide functional evaluation of Microchip Voltage Regulators that utilize the TO220-3 and TO263-3 package and the following device pinouts:

Pin Number U1 footprint

The TO220-3 / TO263-3 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 TO220-3 / TO263-3 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 modulare plugin boards currently consist of an Input Voltage Linestep Board, Output Voltage Loadstep Board, and several other device packages.

TO220-3/TO263-3 VOLTAGE REGULATOR

EVALUATION BOARD USER’S GUIDE

Pin 1 V Pin 2 GND Pin 3 V

OUT

1.2 WHAT IS THE TO220-3/TO263-3 VOLTAGE REGULATOR EVALUATION BOARD?

The TO220-3 / TO263-3 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 Funtional Blocks

The TO220-3 / TO263-3 Voltage Regulator Evaluation Board can be broken up into three functional blocks. These 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, C 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.

TO220-3/TO263-3 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 R resistor. JP5 connects R

1.2.5 Output Capacitor

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

is populated with a 1 µF, 6.3V, XR7 ceramic capacitor. C3 is provided for the user to

populate with a radial lead through-hole capacitor with 0.100” lead spacing.

1.2.6 Power Supply

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

1.3 WHAT THE TO220-3/TO263-3 VOLTAGE REGULATOR EVALUATION BOARD KIT INCLUDES

This TO220-3/TO263-3 Voltage Regulator Evaluation Board kit includes:

• One TO220-3/TO263-3 Voltage Regulator Evaluation Board, 102-00204

• Important Information "Read First"

to the device output. R6 may also be populated with a load

to the device output.

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The TO220-3/TO263-3 Voltage Regulator Evaluation Board is designed to be used to facilitate evaluation of Microchip’s voltage regulators or to be used as a stand-alone voltage regulator board. Jumpers have been placed on the board to facilitate testing of specific voltage regulator parameters.

The TO220-3/TO263-3 Voltage Regulator Evaluation Board kit comes with a 1 uF ceramic input and output capacitor soldered to the board. The board has two unpopulated resistor locations that may be used for loads. The board also has one unpopulated output capacitor location that may be populated with a through-hole radial lead capacitor.

2.2 FEATURES

The TO220-3/TO263-3 Voltage Regulator Evaluation Board has the following features:

• Input and Output headers for future connection to Line Step and Load Step modules

• Ample testpoints to attach multimeters, power supplies, and loads

• Jumper to select ground current measurement

• Jumpers to connect output load resistors

• Jumper to connect input capacitor to circuit

• Footprint for an additional through-hole radial lead output capacitor

TO220-3/TO263-3 VOLTAGE REGULATOR

EVALUATION BOARD USER’S GUIDE

2.3 GETTING STARTED

The TO220-3/TO263-3 Voltage Regulator Evaluation Board is fully assembled and tested. All that is required for operating is a user supplied voltage regulator and a supply voltage source. Some of the tests that may be completed using the TO220-3/TO263-3 Voltage Regulator Evaluation Board shall now be described.

2.3.1 Ground Current and Quiescent Current

When measuring ground current, jumper JP3 should be removed, otherwise leave jumper JP3 on. To measure ground current, perform the following steps:

1. Add desired load resistors to R

2. Remove jumpers JP3, JP4 and JP5.

3. Connect an ammeter across testpoints TP6(+) and TP7(-). Select appropriate

meter scale for device being evaluated.

4. Connect a voltmeter across testpoints TP9(+) and TP10(-).

5. Add jumper JP1.

6. Apply source voltage to testpoints TP1(+) and TP2(-).

7. Verify the voltage across testpoints TP10 and TP9 is within the expected range

of the device being tested.

and R6.

TO220-3/TO263-3 Voltage Regulator Evaluation Board User’s Guide

8. Read the Ground Current directly from the ammeter connected to testpoints TP6 and TP7.

9. Vary the input voltage to obtain data for ground current versus input voltage. With no load attached to the output of the voltage regulator, the measured ground current is also called the quiescent current of the regulator.

10. Add a load selection jumper, JP4 or JP5.

11. Read the Ground Current directly from the ammeter connected to testpoints TP6 and TP7.

12. The data collected will be the ground current versus load current.

2.3.2 Load Resistance

R5 and R6 are used to set desired load values. One choice is to set R5 to the minimum current desired for testing. R Either value may be selected by adding their respective jumpers.

2.3.3 Line Step

Dynamic Line Step response may be evaluated by connecting an electronically switched input voltage to testpoints TP1(+) and TP2(-) or to connector J1. An oscilloscope is connected to TP3(Ch1 Trigger), TP9(Ch2) and TP10(Gnd). An appropriate load is selected using R electronically switched from a low voltage to a high voltage. The corresponding voltage waveform data of the voltage regulator response is captured by the oscilloscope. Microchip will be offering a Line Step module that connects directly to connector J1. The Line Step module will be capable of switching between two voltage levels that the user supplies.

would then be set to a value desired for specific tests.

and JP4 or R6 and JP5. The input voltage is then

2.3.4 Load Step

Dynamic Load Step response may be evaluated by connecting an electronically switched load to testpoints TP9(+) and TP10(-) or to connector P1. An oscilloscope is connected to the electronic load switch signal (Ch1 Trigger) and to TP9(Ch2) and TP10(Gnd). The load is then electronically switched from a high resistance to a low resistance. The corresponding voltage waveform data of the voltage regulator response is captured by the oscilloscope. Microchip will be offering a Load Step module that connects directly to connector P1. The Load Step module will have several selectable load values populated onboard to cover a wide range of loads. The load will have the ability to be electronically or manually switched.

2.3.5 Power Supply Rejection Ratio (PSRR)

Power Supply Rejection Ratio tests are performed by removing the input capacitor jumper, JP1, and connecting an appropriate PSRR analyzer to the TO220-3/TO263-3 Voltage Regulator Evaluation Board. The PSRR analyzer may then sweep the input voltage frequencies and record the corresponding output voltages.

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematis and layouts for the TO220-3/TO263-3 Voltage Regulator Evaluation Board:

• Board - Schematic

• Board - Top Silk

• Board - Top Copper

• Board - Bottom Copper

TO220-3/TO263-3 VOLTAGE REGULATOR

EVALUATION BOARD USER’S GUIDE

Date

REV Revision Notes

Initial Release 05-DEC-2007

TO220-3/TO263-3 Voltage Regulator Evaluation Board User’s Guide

A.2 BOARD - SCHEMATIC

A.3 BOARD - TOP SILK

Schematic and Layouts

TO220-3/TO263-3 Voltage Regulator Evaluation Board User’s Guide

A.4 BOARD - TOP COPPER

A.5 BOARD - BOTTOM COPPER

Schematic and Layouts

TO220-3/TO263-3 Voltage Regulator Evaluation Board User’s Guide

NOTES:

TO220-3/TO263-3 VOLTAGE REGULATOR

EVALUATION BOARD USER’S GUIDE

Appendix B. Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty Reference Description Manufacturer Part Number

1 C1 CAP CERAMIC 1.0 uF 50V X7R 0805 Murata Electronics®GRM21BR71H105KA12L 1 C2 CAP CERAMIC 1.0 uF 16V X7R 0805 Kemet 1 C3 DO NOT POPULATE — — 1 J1 2 pin RA header, 0.100 centers,

0.025 sq pins, 0.070 pcb to pin center height, 36 pins to a strip (yields 18 headers)

4 JP1, JP3, JP4,

JP5

4 JP1, JP3, JP4,

JP5

1 P1 RA socket, 0.100 centers,

1 PCB RoHS Compliant Bare PCB, TO220-3

2 R5, R6 DO NOT POPULATE — — 8 TP1, TP2, TP3,

TP4, TP6, TP7,

TP9, TP10 2 U1, U2 DO NOT POPULATE — — 4 On Each Corner Bumpon Hemisphere, 0.44 x 0.20,

Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM

used in manufacturing uses all RoHS-compliant components.

2 pin header, 0.100 centers, 0.025 sq pins, 0.070

Connector, Jumper Shorting, Tin Sullins Electronics STC02SYAN

0.025 sq pins, 0.070 pcb to pin center height

/ TO263-3 Voltage Regulator Evaluation Board

SMT Testpoint Keystone

Black

Electronics C0805C105K4RACTU

3M 929835-01-36-RK

Molex

Electronics 22-28-4360

Sullins Electronics PPPC021LGBN-RC

Microchip Technology Inc.

Electronics

3M SJ-5003 (BLACK)

104-000204

5016

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03/26/09

Microchip Technology TO220-3 Voltage Regulator Evaluation Board, TO263-3 Voltage Regulator Evaluation Board User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

Chapter 1. Product Overview

1.1 INTRODUCTION

1.2 WHAT IS THE TO220-3/TO263-3 VOLTAGE REGULATOR EVALUATION BOARD?

1.3 WHAT THE TO220-3/TO263-3 VOLTAGE REGULATOR EVALUATION BOARD KIT INCLUDES

Chapter 2. Installation and Operation

2.1 INTRODUCTION

2.2 FEATURES

2.3 GETTING STARTED

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

A.2 BOARD - SCHEMATIC

A.3 BOARD - TOP SILK

A.4 BOARD - TOP COPPER

A.5 BOARD - BOTTOM COPPER

Appendix B. Bill of Materials (BOM)

WORLDWIDE SALES AND SERVICE