Microchip Technology Voltage Supervisor SOT23 User Manual

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Voltage Supervisor SOT23

Evaluation Board

User’s Guide

Page 2

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your 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 support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.

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The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K

EELOQ, microID, MPLAB, PIC, PICmicro, PICSTART,

PRO MATE, PowerSmart, rfPIC and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Linear Active Thermistor, Mindi, MiWi, MPASM, MPLIB, MPLINK, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

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All other trademarks mentioned herein are property of their respective companies.

Printed on recycled paper.

Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona, Gresham, Oregon and Mountain View, California. The Company’s quality system processes and procedures are for its PICmicro 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.

8-bit MCUs, KEELOQ

code hopping devices, Serial

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VOLTAGE SUPERVISOR

SOT23 EVALUATION BOARD

USER’S GUIDE

Table of Contents

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

Chapter 1. Product Overview ........................................................................................ 5

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

1.2 What is the Voltage Supervisor SOT23 Evaluation Board ? .......................... 5

1.3 What the Voltage Supervisor SOT23 Evaluation Board Kit Includes ............ 5

Chapter 2. Installation and Operation .......................................................................... 7

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

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

2.3 Getting Started ............................................................................................... 8

2.4 Voltage Supervisor SOT23 Evaluation Board Description .......................... 12

2.5 Evaluating the Device ................................................................................... 13

Appendix A. Schematic and Layouts ........................................................................ 15

A.1 Introduction .................................................................................................. 15

A.2 Schematics and PCB Layout ....................................................................... 15

A.3 Board Schematic 1 ..................................................................................... 16

A.4 Board Layout - Top Layer With Silk Screen ............................................. 17

Appendix B. Bill Of Materials (BOM) ......................................................................... 19

Appendix C. Microchip Analog SOT-23 Device Compatibility ................................ 21

C.1 Introduction .................................................................................................. 21

C.2 PCB Compatibility ........................................................................................ 21

C.3 Ideas on Evaluating An LDO ....................................................................... 22

Worldwide Sales and Service .................................................................................... 24

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

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VOLTAGE SUPERVISOR

SOT23 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.

INTRODUCTION

This chapter contains general information that will be useful to know before using the Voltage Supervisor SOT23 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 Voltage Supervisor SOT23 Evaluation Board as a development tool. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the Voltage Supervisor SOT23 Evaluation Board.

• Chapter 2. “Installation and Operation” – Includes instructions on how to get started with this evaluation board.

• Appendix A. “Schematic and Layouts” – Shows the schematic and layout diagrams for the Voltage Supervisor SOT23 Evaluation Board.

• Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the Voltage Supervisor SOT23 Evaluation Board.

• Appendix C. “Microchip Analog SOT-23 Device Compatibility” – Explains how this board (PCB) may be used with other Microchip Analog devices in the SOT-23-3 package.

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Voltage Supervisor SOT23 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...

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

Preface

DOCUMENT REVISION HISTORY

Revision B (July 2006)

• Add disclaimer to Bill of Materials regarding RoHS-Compliant part numbers

• Removed Appendix D and incorporated information here.

Revision A (September 2004)

• Initial Release of this Document.

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

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VOLTAGE SUPERVISOR

SOT23 EVALUATION BOARD

USER’S GUIDE

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the Voltage Supervisor SOT23 Evaluation Board and covers the following topics:

• What is the Voltage Supervisor SOT23 Evaluation Board ?

• What the Voltage Supervisor SOT23 Evaluation Board kit includes

1.2 WHAT IS THE VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD ?

The Voltage Supervisor SOT23 Evaluation Board allows the system designer to quickly evaluate the operation of Microchip Technology’s Voltage Supervisors and Voltage Detectors in the SOT-23-3 (3-pin SOT-23) package.

The Voltage Supervisor SOT23 Evaluation Board PCB supports the four different SOT-23-3 pinouts for the product family. This board has been made generic so that other devices may be supported with this board.

1.3 WHAT THE VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD KIT INCLUDES

This Voltage Supervisor SOT23 Evaluation Board Kit includes:

• Five Voltage Supervisor SOT23 Evaluation Board Printed Circuit Boards (PCBs)

• Five MCP112 device samples (MCP112T-270E/TT) that can be installed on the Voltage Supervisor SOT23 Evaluation Board PCBs

- 2.63V Trip Point (Typical)

- Extended Temperature

- SOT-23-3 Package

• Voltage Supervisor SOT23 Evaluation Board User’s Guide (Electronic Version on CD)

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

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

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Chapter 2. Installation and Operation

2.1 INTRODUCTION

The blank Printed Circuit Board (PCB) allows the desired voltage supervisor or voltage detector device to be installed along with other desired passive components (resistor and capacitors) and connection posts.

The Voltage Supervisor SOT23 Evaluation Board PCB supports four different SOT-23-3 pinouts. Three of these pinouts are used by the Voltage Supervisor or Voltage Detector product family, while the fourth is used by other Microchip analog products (see Appendix C. “Microchip Analog SOT-23 Device Compatibility”). This board has been made generic so that other devices may be supported with this board. However, the silk screen markings are designed for ease-of-use with the voltage supervisor devices.

2.2 FEATURES

The Voltage Supervisor SOT23 Evaluation Board has the following features:

• Connection terminals may be either through-hole or surface-mount

• Four SOT-23-3 pinouts supported

• Optional passive components for:

- Power Supply Filtering

- Output Filtering

- Output Pull-up Resistor

- Output Pull-down Resistor

- Output Loading Resistor

- Output Series Resistor

• Silk screen area to write specifics of implemented circuit , such as MCP111, 2.7V, 10 kΩ (to indicate that the device is the MCP111 with the 2.7V trip point and an external 10 kΩ pull-up resistor on the output)

VOLTAGE SUPERVISOR

SOT23 EVALUATION BOARD

USER’S GUIDE

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

2.3 GETTING STARTED

The Voltage Supervisor SOT23 Evaluation Board is a blank PCB that allows the user to configure the circuit to their exact requirements. The Passive components use the surface mount 805 package layout. Figure 2-1 shows the board circuit. Table 2-1 shows which circuit option needs to be used for a given voltage supervisor/voltage detector. There are currently no voltage supervisors/voltage detectors that use the Option 3 pinout. For other Microchip Analog Devices, please refer to Appendix C. “Microchip

Analog SOT-23 Device Compatibility”.

FIGURE 2-1: VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD SCHEMATIC

Option 1

Option 2

(1)

OUT

VDD

(1)

Pinout not used by

voltage supervisors,

but other SOT-23-3 devices

(such as voltage references)

Option 3

Option 4

(1)

Note 1: Components C1, C2, R1, R2 and R3

are placed to support different devices and configurations. These components may not be required for some configurations.

2: For Option 1, use: MCP112T-270/NB

For Option 2, use: TCM809RVNB713 For Option 3, use: MCP1525 (a V For Option 4, use: MCP100T-270I/TT

REF

)

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Installation and Operation

TABLE 2-1: VOLTAGE SUPERVISOR / VOLTAGE DETECTOR DEVICES AND

EVAL BOARD CIRCUIT/FOOTPRINT OPTION

Device

MCP111 Option 1 V

MCP112 Option 1 V

TC54VC Option 1 V

TC54VN Option 1 V

TC51 Option 1 Open-Drain R1 = 47 kΩ

MCP103 Option 2 RST

TCM809 Option 2 RESET

TCM810 Option 2 RESET (H) Push-Pull

MCP809 Option 2 RESET

MCP810 Option 2 RESET

MCP102 Option 4 RST

MCP121 Option 4 RST

MCP131 Option 4 RST

TC1275 Option 4 RESET

Supported

Output Signal

(Active State)

(L) Open-Drain R1 = 100 kΩ

OUT

(L) Push-Pull

OUT

(L) Push-Pull

OUT

(L) Open-Drain R1 = 270Ω

OUT

(L)

OUT

(L) Push-Pull

(L) Push-Pull C1 = 0.1 µF

(L) Push-Pull

(L) Open-Drain with Internal Pull-up

(L) Open-Drain R1 = 100 kΩ

(L) Push-Pull C1 = 0.1 µF

Output Type

Comment/Recommended

component values

TC1276 Option 4 RESET

TC1277 Option 4 RESET (H) Push-Pull C1 = 0.1 µF

TC1278 Option 4 RESET (H) Open-Drain with Internal Pull-up

TC1279 Option 4 RESET

TC1272 Option 4 RESET

TC1272A Option 4 RESET

TC1273 Option 4 RESET

TC1274 Option 4 RESET (H) Push-Pull C1 = 0.1 µF

MCP100 Option 4 RESET

MCP101 Option 4 RESET (H) Push-Pull

MCP120 Option 4 RESET

MCP130 Option 4 RESET

(L) Open-Drain C1 = 0.1 µF

R1 = 47 kΩ

(L) Open-Drain with Internal Pull-up

(L) Push-Pull C1 = 0.1 µF

(L) Open-Drain C1 = 0.1 µF

R1 = 47 kΩ

(L) Push-Pull

(L) Open-Drain C1 = 0.1 µF

R1 = 47 kΩ

(L) Open-Drain with Internal Pull-up

C1 = 0.1 µF

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

2.3.1 The Hardware

Figure 2-2 shows the layout of the Voltage Supervisor SOT23 Evaluation Board . This is a small board (1”x1.2” (25.4 mm x 30.5 mm)) that is single-sided. There are three connection points (V surface-mount connector posts. Additionally, a test point is available on the device V

, which may be useful if Resistor R3 is installed.

OUT

The different SOT-23-3 layout options are outlined in the diagram below, with Opt 1, Opt 2, Opt 3 and Opt 4 indicating the layout option of that SOT-23-3 footprint.

Resistor R1 is a pull-up resistor that may need to be installed for devices with an open-drain output. Though resistor R2 is not currently required, it was placed for possible future requirements. Resistor R3, too, is not required, but may be useful if this board is to be interfaced into existing circuits. If resistor R3 is to be installed, remember to cut the trace that “shorts out” R3. Capacitors C1 and C2 are bypass capacitors that may be required to be installed, depending on the device selected and the system requirements (such as the noise present on the power supply). Table 2-2 describes the components.

FIGURE 2-2: VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD

, VSS and V

LAYOUT

) that can use either through-hole or

OUT

Silk-screen area to write specifics of implemented circuit (ex: MCP112, 2.7V to indicate that the device is the MCP112 with the 2.7V trip point).

Test Point: If R3 is installed, signal may be different than V

OUT

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Installation and Operation

TABLE 2-2: OPTIONAL PASSIVE COMPONENTS

Device Comment

C1 Power Supply Bypass Capacitor

C2 Output Filter Capacitor

R1 Pull-up Resistor

R2 Pull-down Resistor

R3 Inline Resistance of Device output

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

2.4 VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD DESCRIPTION

The Voltage Supervisor SOT23 Evaluation Board PCB is designed to be flexible in the type of device evaluation that can be implemented.

The following sections describe each element of this evaluation board in further detail.

2.4.1 Power and Ground

The Voltage Supervisor SOT23 Evaluation Board can have connection posts installed for the power (V surface-mount connectors.

For device evaluation, the use of an external variable power supply or waveform generator is required. The type of equipment used will determine the evaluation that may be performed.

) and ground (VSS) planes. The layout allows either through-hole or

2.4.2 Output (V

OUT

)

The Voltage Supervisor SOT23 Evaluation Board can have a connection post installed for the output (V

) signal. The layout allows either a through-hole connector or a

OUT

surface mount connector.

For device evaluation, the use of an oscilloscope or digital volt meter (DVM) is required. The type of equipment used will determine the evaluation that may be performed.

2.4.3 SOT-23-3 Footprints

There are four SOT-23-3 pinout options that the Voltage Supervisor SOT23 Evaluation Board PCB supports. Figure 2-3 shows these four pinouts. Some devices may use different nomenclature for the pin names, such as GND instead of V and RESET (or RESET

) or RST instead of V

OUT

Other Microchip analog devices may be used with this PCB if the power and ground pins match one of these four options. Appendix C. “Microchip Analog SOT-23 Device Compatibility” discusses other Microchip analog devices that may be used with this PCB.

FIGURE 2-3: PINOUT OPTIONS

Option 1

Option 2 Option 3 Option 4

, VIN instead of VDD

OUT

VSSV

OUT

2.4.4 Passive Components (C1, C2, R1, R2 and R3)

The footprints for these components are present to allow maximum flexibility in the use of this PCB to evaluate a wide range of SOT-23-3 devices. The purpose of these components may vary depending on the device under evaluation and how it is to be used in the desired circuit. Please refer to the device data sheet for the components that should be used when using that device.

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2.5 EVALUATING THE DEVICE

When evaluating a Voltage Supervisor or Voltage Detector device, a minimum set of test equipment should be available. Table 2-3 shows the recommended test equipment.

TABLE 2-3: TEST EQUIPMENT

Hardware Connect to: Comment

Variable Power Supply

Arbitary Waveform Generator

Digital Multi-Meter (D.M.M.)

Oscilloscope V

Test Light (LED) V

Installation and Operation

VDD, VSS This allows the voltage to the SOT23 Evaluation Board

to be varied so the device output can be monitored.

VDD, VSS This is like a variable power supply, but allows program-

ablity into the input signal that the device will be subjected to. This also allows a particular waveform to be repeated (such as a 60 Hz sine wave that varies from 1V to 5V)

OUT

Used to indicate the output state (Low or High) of the Voltage Supervisor/Voltage Detector.

Allows the device conditions and response to be better evaluated due to the ability to capture this information. This is useful for faster signals and cases where small spikes need to be detected.

Used to visually indicate the output state (low or high) of the Voltage Supervisor/Voltage Detector. Ensure that the current requirements of this light can be supplied by the device’s output pin.

A typical system that would be used to evaluate the voltage supervisor or voltage detector device is shown in Figure 2-4. Figure 2-4 also shows an example input and output waveforms for a voltage supervisor or voltage detector device.

FIGURE 2-4: EVALUATION SYSTEM

Variable

Power

Supply

Arbitary Waveform Generator

Arbitary Waveform Generator Output

Test Point or

OUT

SOT23 Evaluation Board PCB

Voltage

Supervisor

Voltage

Detector

Device VDD out of Valid Operating Range Output voltage may be indeterminate

Test Point

Oscilloscope

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

NOTES:

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SOT23 EVALUATION BOARD

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the schematics and layouts for the Voltage Supervisor SOT23 Evaluation Board . Diagrams included in this appendix:

• Board Schematic - Digital Circuitry

• Board - Top Layer

A.2 SCHEMATICS AND PCB LAYOUT

Figure A.3 shows the schematic of the Voltage Supervisor SOT23 Evaluation Board .

Figure A.4 shows the layout for the top layer of the Voltage Supervisor SOT23 Evaluation Board . The layer order is shown in Figure A-1.

FIGURE A-1: LAYER ORDER

VOLTAGE SUPERVISOR

USER’S GUIDE

Top Layer (Power, Ground, and Signals)

Bottom Layer (Blank)

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

A.3 BOARD SCHEMATIC 1

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Schematic and Layouts

A.4 BOARD LAYOUT - TOP LAYER WITH SILK SCREEN

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

NOTES:

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VOLTAGE SUPERVISOR

SOT23 EVALUATION BOARD

USER’S GUIDE

Appendix B. Bill Of Materials (BOM)

TABLE B-1: BILL OF MATERIALS

Qty Reference Description Manufacturer Part Number

1 PCB 103-00030 SOT23 Evaluation Board PCB Microchip

Technology Inc.

0 U1, U2, U3, U4 SOT-23-3 Device

(Only one of U1 - U4 installed per board)

0 C1 Power Supply Bypass Capacitor

Surface-mount (805 package) (Optional - Application-dependent)

0 C2 Output Filer Capacitor

Surface-mount (805 package) (Optional - Application-dependent)

0 R1 Output Pull-up resistor

Surface-mount (805 package) (Optional - Application-dependent)

0 R2 Output Pull-down resistor

Surface-mount (805 package) (Optional - Application-dependent)

0 R3 Output inline resistor

Surface-mount (805 package) (Optional - Application-dependent)

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

, VSS, V

used in manufacturing uses all RoHS-compliant components.

VDD, VSS and V

OUT

connector

VDD, VSS and V

OUT

connector

through-hole

OUT

surface-mount

OUT

Microchip

Technology Inc.

— User-specified

Keystone

Electrionics

Keystone

Electrionics

103-00030

User-specified

5012

5016

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

NOTES:

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VOLTAGE SUPERVISOR

SOT23 EVALUATION BOARD

USER’S GUIDE

Appendix C. Microchip Analog SOT-23 Device Compatibility

C.1 INTRODUCTION

This appendix documents other Microchip analog devices that can be evaluated using this PCB. New devices may be introduced after the publication of this document that may be supported. Compare the pinout of the device to the PCB schematic/layout to determine compatibility of any SOT-23-3 (3-pin SOT-23) packaged device.

C.2 PCB COMPATIBILITY

There are four SOT-23-3 (3-pin SOT-23) pinouts that the Voltage Supervisor SOT23 Evaluation Board PCB supports. Figure C-1 shows these four pinouts. Other Microchip analog devices may be used with this PCB if the power and ground pins match one of these four options. Though these devices may use different nomenclature for the pin names, as long as the power and ground signals match one of the four options, this PCB should be able to be used to evaluate that device.

Table C-1 shows the Microchip analog device part number, the analog family the device belongs to, which footprint option to use and the recommended components to use for the circuit. Please refer to the device data sheet for complete information of the application circuit.

FIGURE C-1: SOT-23-3 PINOUT OPTIONS

Option 1

OUT

Option 2 Option 3 Option 4

VSSV

OUT

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Voltage Supervisor SOT23 Evaluation Board User’s Guide

TABLE C-1: MICROCHIP ANALOG DEVICES AND SOT23 EVAL BOARD

CIRCUIT/FOOTPRINT OPTION SELECTION

Device Device Family

MCP1700 LDO Option 2 C1 = 1 µF Ceramic

MCP1701 LDO Option 2 C1 = 1 µF Tantalum

MCP1525 Voltage Reference Option 3 C1 = 0.1 µF

MCP1541 Voltage Reference Option 3 C1 = 0.1 µF

TC59 LDO Option 4 C1 = 1 µF Tantalum

C.3 IDEAS ON EVALUATING AN LDO

One of the characteristics that a designer may wish to evaluate on a LDO is how the LDO responds to transient loads. Figure C-2 shows a system block diagram for evaluating a LDO and a typical waveform response (at test point) for the function generator signal. The output of the function generator connects to a BJT transistor to simulate the fast switching loads of the circuit.

The value of C2, R3 and C Look at both the worst-case amplitude load requirements for a loaded and unloaded system. As the output response of the LDOs become faster, the selection of a smaller (cheaper) output load capacitor (C performance).

will depend on the LDO used and the load of the circuit.

Supported

) becomes possible (for the same system

Comment/ Recommended Component Values:

C2 = 1 µF Ceramic

C2 = 1 µF Tantalum

C2 = 1 µF to 10 µF

C2 = 1 µF Tantalum

FIGURE C-2: LDO EVALUATION SYSTEM

SOT23 Evaluation Board PCB

Power Supply

Function Generator Output

Test Point

LDO

Test Point

From Function Generator

Page 27

NOTES:

Microchip Analog SOT-23 Device Compatibility

Page 28

WORLDWIDE SALES AND SERVICE

AMERICAS

Corporate Office

2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://support.microchip.com Web Address: www.microchip.com

Atlanta

Alpharetta, GA Tel: 770-640-0034 Fax: 770-640-0307

Boston

Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088

Chicago

Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075

Dallas

Addison, TX Tel: 972-818-7423 Fax: 972-818-2924

Detroit

Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260

Kokomo

Kokomo, IN Tel: 765-864-8360 Fax: 765-864-8387

Los Angeles

Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608

Santa Clara

Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445

Toronto

Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509

ASIA/PACIFIC

Asia Pacific Office

Suites 3707-14, 37th Floor Tower 6, The Gateway Habour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431

Australia - Sydney

Tel: 61-2-9868-6733 Fax: 61-2-9868-6755

China - Beijing

Tel: 86-10-8528-2100 Fax: 86-10-8528-2104

China - Chengdu

Tel: 86-28-8676-6200 Fax: 86-28-8676-6599

China - Fuzhou

Tel: 86-591-8750-3506 Fax: 86-591-8750-3521

China - Hong Kong SAR

Tel: 852-2401-1200 Fax: 852-2401-3431

China - Qingdao

Tel: 86-532-8502-7355 Fax: 86-532-8502-7205

China - Shanghai

Tel: 86-21-5407-5533 Fax: 86-21-5407-5066

China - Shenyang

Tel: 86-24-2334-2829 Fax: 86-24-2334-2393

China - Shenzhen

Tel: 86-755-8203-2660 Fax: 86-755-8203-1760

China - Shunde

Tel: 86-757-2839-5507 Fax: 86-757-2839-5571

China - Wuhan

Tel: 86-27-5980-5300 Fax: 86-27-5980-5118

China - Xian

Tel: 86-29-8833-7250 Fax: 86-29-8833-7256

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-4182-8400 Fax: 91-80-4182-8422

India - New Delhi

Tel: 91-11-4160-8631 Fax: 91-11-4160-8632

India - Pune

Tel: 91-20-2566-1512 Fax: 91-20-2566-1513

Japan - Yokohama

Tel: 81-45-471- 6166 Fax: 81-45-471-6122

Korea - Gumi

Tel: 82-54-473-4301 Fax: 82-54-473-4302

Korea - Seoul

Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934

Malaysia - Penang

Tel: 60-4-646-8870 Fax: 60-4-646-5086

Philippines - Manila

Tel: 63-2-634-9065 Fax: 63-2-634-9069

Singapore

Tel: 65-6334-8870 Fax: 65-6334-8850

Taiwan - Hsin Chu

Tel: 886-3-572-9526 Fax: 886-3-572-6459

Taiwan - Kaohsiung

Tel: 886-7-536-4818 Fax: 886-7-536-4803

Taiwan - Taipei

Tel: 886-2-2500-6610 Fax: 886-2-2508-0102

Thailand - Bangkok

Tel: 66-2-694-1351 Fax: 66-2-694-1350

EUROPE

Austria - Wels

Tel: 43-7242-2244-3910 Fax: 43-7242-2244-393

Denmark - Copenhagen

Tel: 45-4450-2828 Fax: 45-4485-2829

France - Paris

Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79

Germany - Munich

Tel: 49-89-627-144-0 Fax: 49-89-627-144-44

Italy - Milan

Tel: 39-0331-742611 Fax: 39-0331-466781

Netherlands - Drunen

Tel: 31-416-690399 Fax: 31-416-690340

Spain - Madrid

Tel: 34-91-708-08-90 Fax: 34-91-708-08-91

UK - Wokingham

Tel: 44-118-921-5869 Fax: 44-118-921-5820

07/21/06

Microchip Technology Voltage Supervisor SOT23 User Manual

Preface

INTRODUCTION

DOCUMENT LAYOUT

CONVENTIONS USED IN THIS GUIDE

RECOMMENDED READING

THE MICROCHIP WEB SITE

CUSTOMER SUPPORT

DOCUMENT REVISION HISTORY

Chapter 1. Product Overview

1.1 INTRODUCTION

1.2 WHAT IS THE VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD ?

1.3 WHAT THE VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD KIT INCLUDES

Chapter 2. Installation and Operation

2.1 INTRODUCTION

2.2 FEATURES

2.3 GETTING STARTED

2.4 VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD DESCRIPTION

2.5 EVALUATING THE DEVICE

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

A.2 SCHEMATICS AND PCB LAYOUT

A.4 BOARD LAYOUT - TOP LAYER WITH SILK SCREEN

Appendix B. Bill Of Materials (BOM)

Appendix C. Microchip Analog SOT-23 Device Compatibility

C.1 INTRODUCTION

C.2 PCB COMPATIBILITY

C.3 IDEAS ON EVALUATING AN LDO

WORLDWIDE SALES AND SERVICE