Voltage Supervisor SOT23 Evaluation Board User’s Guide © 2006 Microchip Technology Inc. DS51510B 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in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates.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. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, 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. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2006, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. 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® 8-bit MCUs, KEELOQ® code hopping 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. DS51510B-page ii © 2006 Microchip Technology Inc. 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 © 2006 Microchip Technology Inc. DS51510B-page iii Voltage Supervisor SOT23 Evaluation Board User’s Guide NOTES: DS51510B-page iv © 2006 Microchip Technology Inc. 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. © 2006 Microchip Technology Inc. DS51510B-page 1 Voltage Supervisor SOT23 Evaluation Board User’s Guide CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Arial font: Italic characters Represents Referenced books Emphasized text Examples MPLAB® IDE User’s Guide ...is the only compiler... RECOMMENDED READING For more information regarding the Voltage Supervisor and Voltage Detector devices, the specific device data sheet is recommended reading. Table shows the device and associated Data Sheet literature number. These documents can be downloaded from the Microchip web site at: www.microchip.com. DEVICES AND DATA SHEET LITERATURE NUMBERS Device DS51510B-page 2 Literature # Device Literature # Device Literature # MCP100 DS11187 MCP809 DS11194 TC1277 DS21383 MCP101 DS11187 MCP810 DS11194 TC1278 DS21384 MCP102 DS21906 TC51 DS21429 TC1279 DS21384 MCP103 DS21906 TC54 DS21434 TCM809 DS21661 MCP111 DS21889 TC1272 DS21382 TCM810 DS21661 MCP112 DS21889 TC1272A DS21877 MCP120 DS11184 TC1273 DS21382 MCP121 DS21906 TC1274 DS21382 MCP130 DS11184 TC1275 DS21383 MCP131 DS21906 TC1276 DS21383 © 2006 Microchip Technology Inc. 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 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. © 2006 Microchip Technology Inc. DS51510B-page 3 Voltage Supervisor SOT23 Evaluation Board User’s Guide NOTES: DS51510B-page 4 © 2006 Microchip Technology Inc. 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) © 2006 Microchip Technology Inc. DS51510B-page 5 Voltage Supervisor SOT23 Evaluation Board User’s Guide NOTES: DS51510B-page 6 © 2006 Microchip Technology Inc. VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD USER’S GUIDE 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) © 2006 Microchip Technology Inc. DS51510B-page 7 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 C1(1) 1 2 VSS U1 Option 1 R2(1) VOUT R3(1) 3 3 VDD R1(1) 2 1 U1 Option 2 C2(1) voltage supervisors, but other SOT-23-3 devices U1 Option 3 2 1 (such as voltage references) 3 Pinout not used by Note 1: 1 2 U1 Option 4 3 DS51510B-page 8 2: Components C1, C2, R1, R2 and R3 are placed to support different devices and configurations. These components may not be required for some configurations. For Option 1, use: MCP112T-270/NB For Option 2, use: TCM809RVNB713 For Option 3, use: MCP1525 (a VREF) For Option 4, use: MCP100T-270I/TT © 2006 Microchip Technology Inc. Installation and Operation TABLE 2-1: VOLTAGE SUPERVISOR / VOLTAGE DETECTOR DEVICES AND EVAL BOARD CIRCUIT/FOOTPRINT OPTION Supported on Output Signal (Active State) Output Type Comment/Recommended component values MCP111 Option 1 VOUT (L) Open-Drain R1 = 100 kΩ MCP112 Option 1 VOUT (L) Push-Pull TC54VC Option 1 VOUT (L) Push-Pull TC54VN Option 1 VOUT (L) Open-Drain R1 = 270Ω TC51 Option 1 VOUT (L) Open-Drain R1 = 47 kΩ MCP103 Option 2 RST (L) Push-Pull TCM809 Option 2 RESET (L) Push-Pull TCM810 Option 2 RESET (H) Push-Pull MCP809 Option 2 RESET (L) Push-Pull C1 = 0.1 µF MCP810 Option 2 RESET (L) Push-Pull C1 = 0.1 µF MCP102 Option 4 RST (L) Push-Pull MCP121 Option 4 RST (L) Open-Drain with Internal Pull-up MCP131 Option 4 RST (L) Open-Drain R1 = 100 kΩ TC1275 Option 4 RESET (L) Push-Pull C1 = 0.1 µF TC1276 Option 4 RESET (L) Open-Drain C1 = 0.1 µF R1 = 47 kΩ 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 (L) Open-Drain with Internal Pull-up TC1272 Option 4 RESET (L) Push-Pull C1 = 0.1 µF TC1272A Option 4 RESET (L) Push-Pull C1 = 0.1 µF TC1273 Option 4 RESET (L) Open-Drain C1 = 0.1 µF R1 = 47 kΩ TC1274 Option 4 RESET (H) Push-Pull C1 = 0.1 µF MCP100 Option 4 RESET (L) Push-Pull MCP101 Option 4 RESET (H) Push-Pull MCP120 Option 4 RESET (L) Open-Drain C1 = 0.1 µF R1 = 47 kΩ MCP130 Option 4 RESET (L) Open-Drain with Internal Pull-up C1 = 0.1 µF Device © 2006 Microchip Technology Inc. DS51510B-page 9 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 (VDD, VSS and VOUT) that can use either through-hole or surface-mount connector posts. Additionally, a test point is available on the device VOUT, which may be useful if Resistor R3 is installed. 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 LAYOUT 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). DS51510B-page 10 Test Point: If R3 is installed, signal may be different than VOUT. © 2006 Microchip Technology Inc. Installation and Operation TABLE 2-2: Device OPTIONAL PASSIVE COMPONENTS Comment C1 Power Supply Bypass Capacitor C2 Output Filter Capacitor R1 Pull-up Resistor R2 Pull-down Resistor R3 Inline Resistance of Device output © 2006 Microchip Technology Inc. DS51510B-page 11 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 (VDD) and ground (VSS) planes. The layout allows either through-hole or 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. 2.4.2 Output (VOUT) The Voltage Supervisor SOT23 Evaluation Board can have a connection post installed for the output (VOUT) signal. The layout allows either a through-hole connector or a 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 VSS, VIN instead of VDD and RESET (or RESET) or RST instead of VOUT. 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 VDD VDD VSS VSS 2.4.4 1 2 1 2 VSS VSS VOUT VDD VOUT 2 2 VOUT 1 1 3 Option 4 3 Option 3 3 Option 2 3 Option 1 VOUT VDD 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. DS51510B-page 12 © 2006 Microchip Technology Inc. Installation and Operation 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 VDD, VSS This allows the voltage to the SOT23 Evaluation Board to be varied so the device output can be monitored. Arbitary Waveform Generator VDD, VSS This is like a variable power supply, but allows programablity 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) Digital Multi-Meter (D.M.M.) VOUT Used to indicate the output state (Low or High) of the Voltage Supervisor/Voltage Detector. Oscilloscope VOUT 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. Test Light (LED) VOUT 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 SOT23 Evaluation Board PCB Variable Power Supply or Arbitary Waveform Generator Oscilloscope Voltage Supervisor or Voltage Detector R3 C2 Test Point Arbitary Waveform Generator Output Test Point or VOUT Device VDD out of Valid Operating Range Output voltage may be indeterminate © 2006 Microchip Technology Inc. DS51510B-page 13 Voltage Supervisor SOT23 Evaluation Board User’s Guide NOTES: DS51510B-page 14 © 2006 Microchip Technology Inc. VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD USER’S GUIDE 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 Top Layer (Power, Ground, and Signals) Bottom Layer (Blank) © 2006 Microchip Technology Inc. DS51510B-page 15 Voltage Supervisor SOT23 Evaluation Board User’s Guide BOARD SCHEMATIC 1 M A.3 DS51510B-page 16 © 2006 Microchip Technology Inc. Schematic and Layouts A.4 BOARD LAYOUT - TOP LAYER WITH SILK SCREEN © 2006 Microchip Technology Inc. DS51510B-page 17 Voltage Supervisor SOT23 Evaluation Board User’s Guide NOTES: DS51510B-page 18 © 2006 Microchip Technology Inc. VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD USER’S GUIDE Appendix B. Bill Of Materials (BOM) TABLE B-1: Qty BILL OF MATERIALS Reference Description 1 PCB 103-00030 SOT23 Evaluation Board PCB 0 U1, U2, U3, U4 Manufacturer Part Number Microchip Technology Inc. Microchip Technology Inc. — 103-00030 SOT-23-3 Device User-specified (Only one of U1 - U4 installed per board) 0 C1 Power Supply Bypass Capacitor User-specified Surface-mount (805 package) (Optional - Application-dependent) 0 C2 Output Filer Capacitor — User-specified Surface-mount (805 package) (Optional - Application-dependent) 0 R1 Output Pull-up resistor — User-specified Surface-mount (805 package) (Optional - Application-dependent) 0 R2 Output Pull-down resistor — User-specified Surface-mount (805 package) (Optional - Application-dependent) 0 R3 Output inline resistor — User-specified Surface-mount (805 package) (Optional - Application-dependent) Keystone 5012 0 VDD, VSS, VOUT VDD, VSS and VOUT through-hole connector Electrionics® Keystone 5016 0 VDD, VSS, VOUT VDD, VSS and VOUT surface-mount connector Electrionics 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. © 2006 Microchip Technology Inc. DS51510B-page 19 Voltage Supervisor SOT23 Evaluation Board User’s Guide NOTES: DS51510B-page 20 © 2006 Microchip Technology Inc. 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 VSS © 2006 Microchip Technology Inc. 1 2 1 2 VSS VSS VOUT VDD VOUT 2 2 VOUT 1 1 3 Option 4 VSS 3 Option 3 VDD 3 Option 2 VDD 3 Option 1 VOUT VDD DS51510B-page 21 Voltage Supervisor SOT23 Evaluation Board User’s Guide TABLE C-1: MICROCHIP ANALOG DEVICES AND SOT23 EVAL BOARD CIRCUIT/FOOTPRINT OPTION SELECTION Device Comment/ Recommended Component Values: MCP1700 LDO Option 2 C1 = 1 µF Ceramic C2 = 1 µF Ceramic MCP1701 LDO Option 2 C1 = 1 µF Tantalum C2 = 1 µF Tantalum MCP1525 Voltage Reference Option 3 C1 = 0.1 µF C2 = 1 µF to 10 µF MCP1541 Voltage Reference Option 3 C1 = 0.1 µF C2 = 1 µF to 10 µF LDO Option 4 C1 = 1 µF Tantalum C2 = 1 µF Tantalum TC59 C.3 Supported on Device Family 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 CL will depend on the LDO used and the load of the circuit. 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 (CL) becomes possible (for the same system performance). FIGURE C-2: LDO EVALUATION SYSTEM SOT23 Evaluation Board PCB Power Supply R3 LDO C2 CL From Function Generator Test Point Function Generator Output Test Point DS51510B-page 22 © 2006 Microchip Technology Inc. Microchip Analog SOT-23 Device Compatibility NOTES: © 2006 Microchip Technology Inc. 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