Voltage Supervisor SOT23
Evaluation Board
User’s Guide
2004 Microchip Technology Inc. DS51510A
Note the following details of the code protection feature on Microchip devices:
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• 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.
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• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
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Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
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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
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and may be superseded by updates. It is your responsibility to
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Trademarks
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, MXDEV, MXLAB, PICMASTER, 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, dsPICDEM,
dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR,
FanSense, FlexROM, fuzzyLAB, In-Circuit Serial
Programming, ICSP, ICEPIC, Migratable Memory, MPASM,
MPLIB, MPLINK, MPSIM, PICkit, PICDEM, PICDEM.net,
PICLAB, PICtail, PowerCal, PowerInfo, PowerMate,
PowerTool, rfLAB, rfPICDEM, Select Mode, Sm art Serial,
SmartTel and Total Endurance 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.
© 2004, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 quality system certification for
its worldwide headquarters, design and wafer fabrication facilities in
Chandler and Tempe, Arizona and Mountain View, California in
October 2003. The Company’s quality system processes and
procedures are for its PICmicro
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.
®
8-bit MCUs, KEELOQ
®
code hopping
DS51510A-page ii 2004 Microchip Technology Inc.
VOLTAGE SUPERVISOR
SOT23 EVALUATION BOARD
USER’S GUIDE
Tabl e of Conten ts
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. Voltage Supervisor SOT23 Evaluation Board........................................... 7
2.1 Introduction ..................................................................................................... 7
2.2 Features ................... .. ............. .. .. .............. .. ............. .. .............. .. .. ............. .. ... 7
2.3 Getting St a rt ed ...... .............. .. .. ............. .. .............. .. ............. .. ... ............. .. ....... 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
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
Appendix D. Revision History ....................................................................................23
D.1 Introduction ..................................................................................................23
D.2 Revision Hi st o ry ......... .. ............. .. .............. .. .. ............. ... ............. .. ............. .. . 23
Worldwide Sales and Service ....................................................................................24
2004 Microchip Technology Inc. DS51510A-page iii
Voltage Supervisor SOT23 Evaluation Board User’s Guide
NOTES:
DS51510A-page iv 2004 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 dif fer 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:
• About This Guide
• Recommended Reading
• The Microchip Web Site
• Customer Support
ABOUT THIS GUIDE
Document Layout
This document describes how to use the Voltage Supervisor SOT23 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 – Important information about the Voltage
Supervisor SOT23 Evaluation Board.
• Chapter 2: Voltage Supervisor SOT23 Evaluation Board – 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 – 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.
• Appendix D: Revision History – Lists the revision history of this document.
2004 Microchip Technology Inc. DS51510A-page 1
Voltage Supervisor SOT23 Evaluation Board User’s Guide
Conventions Used in this Guide
This manual uses the following docum entat io n conven tion s:
DOCUMENTATION CONVENTIONS
Description Represents Examples
Arial font:
Italic characters Referenced books MPLAB
Emphasized text ...is the only comp ile r...
RECOMMENDED READING
For more information regarding the Voltage Supervisor and Voltage Detector devices,
the specific device data sheet is recommended reading. T able 1 shows the device and
associated Data Sheet literature number. These documents can be downloaded from
the Microchip web site at: www.microchip.com.
TABLE 1: DEVICES AND DATA SHEET LITERATURE NUMBERS
Device Literature # Device Literature # Device Literature #
MCP100 DS11187 MCP809 DS11194 TC1277 DS21383
®
IDE User’s Guide
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
DS51510A-page 2 2004 Microchip Technology Inc.
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 (FAQ), 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.
Preface
2004 Microchip Technology Inc. DS51510A-page 3
Voltage Supervisor SOT23 Evaluation Board User’s Guide
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
In addition, there is a Development Systems Information Line which lists the latest
versions of Microchip's development systems software products. This line also
provides 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 Interna tio nal Loca tio ns
DS51510A-page 4 2004 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)
2004 Microchip Technology Inc. DS51510A-page 5
Voltage Supervisor SOT23 Evaluation Board User’s Guide
NOTES:
DS51510A-page 6 2004 Microchip Technology Inc.
VOLTAGE SUPERVISOR
SOT23 EVALUATION BOARD
USER’S GUIDE
Chapter 2. Voltage Supervisor SOT23 Evaluation Board
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)
2004 Microchip Technology Inc. DS51510A-page 7
Voltage Supervisor SOT23 Evaluation Board User’s Guide
2.3 GETTING STARTED
The Voltag e 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. T a ble 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
2
U1
Option 1
3
3
U1
Option 2
1
1
2
R1
R2
(1)
V
(1)
R3
(1)
OUT
V
SS
VDD
C1
(1)
Pinout not used by
voltage supervisors,
but other SOT-23-3 devices
(such as voltage references)
3
U1
Option 3
1
2
U1
Option 4
3
(1)
C2
2
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
)
DS51510A-page 8 2004 Microchip Technology Inc.
TABLE 2-1: VOLTAGE SUPERVISOR / VOLTAGE DETECTOR DEVICES AND
V
OUT
)
EVAL BOARD CIRCUIT/FOOTPRINT OPTION
Device
Supported
on
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
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
Output Type
Comment/Recommended
(L
(L) Push-Pull
(L) Push-Pull
component values
TCM810 Option 2 RESET (H) Push-Pull
MCP809 Option 2 RESET
MCP810 Option 2 RESET
(L) Push-Pull C1 = 0.1 µF
(L) Push-Pull C1 = 0.1 µF
MCP102 Option 4 RST (L) Push-Pull
MCP121 Option 4 RST
MCP131 Option 4 RST
(L) Open-Drain with Internal Pull-up
(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
TC1272 Option 4 RESET
TC1272A Option 4 RESET
TC1273 Option 4 RESET
(L) Open-Drain with Internal Pull-up
(L) Push-Pull C1 = 0.1 µF
(L) Push-Pull C1 = 0.1 µF
(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
2004 Microchip Technology Inc. DS51510A-page 9
Voltage Supervisor SOT23 Evaluation Board User’s Guide
e
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
DD
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).
DS51510A-page 10 2004 Microchip Technology Inc.
Test Point: If R3 is
installed, signal may b
different than V
OUT
.
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
2004 Microchip Technology Inc. DS51510A-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 (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
DD
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
V
DD
3
Option 2 Option 3 Option 4
V
DD
3
V
SS
3
, VIN instead of VDD
SS
V
SS
3
V
OUT
1
V
2
SS
1
VSSV
OUT
2
1
2
V
V
DD
V
OUT
OUT
1
2
V
DD
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.
DS51510A-page 12 2004 Microchip Technology Inc.
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: Com men t
Variable Power
Supply
Arbitary
Waveform
Generator
Digital Multi-Meter
(D.M.M.)
Oscilloscope V
Test Light (LED) V
V
, VSS This allows the voltage to the SOT23 Evaluation Board
DD
to be varied so the device output can be monitored.
, VSS This is like a variable power supply, but allows program-
V
DD
ablity into the input signal that the device will be
subjected to. This also allows a particular waveform to
be repeated (such as a 60Hz sine wave that varies from
1V to 5V)
V
OUT
Used to indicate the output state (Low or High) of the
Voltage Supervisor/Voltage Detector.
OUT
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.
OUT
Used to visually indicate the out put st ate (l ow 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
or
Arbitary
Waveform
Generator
Arbitary Waveform
Generator
Output
Test
Point or
V
OUT
SOT23 Evaluation Board PCB
Voltage
Supervisor
or
Voltage
Detector
Device VDD out of Valid Operating Range
Output voltage may be indeterminate
C2
R3
Test Point
Oscilloscope
2004 Microchip Technology Inc. DS51510A-page 13
Voltage Supervisor SOT23 Evaluation Board User’s Guide
NOTES:
DS51510A-page 14 2004 Microchip Technology Inc.
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-2 shows the schematic of the Voltage Supervisor SOT23 Evaluation Board.
Figure A-3 shows the layout for the top layer of the Voltage Supervisor SOT23 Evaluation
Board. The layer ord er is sh own in F ig ureA-1.
FIGURE A-1: LAYER ORDER
VOLTAGE SUPERVISOR
SOT23 EVALUATION BOARD
USER’ S GUIDE
Top Layer (Power, Ground, and Signals)
Bottom Layer (Blank)
2004 Microchip Technology Inc. DS51510A-page 15
Voltage Supervisor SOT23 Evaluation Board User’s Guide
FIGURE A-2: VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD SCHEMATIC 1
M
DS51510A-page 16 2004 Microchip Technology Inc.
FIGURE A-3: VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD
LAYOUT - TOP LAYER + SILK-SCREEN
2004 Microchip Technology Inc. DS51510A-page 17
Voltage Supervisor SOT23 Evaluation Board User’s Guide
NOTES:
DS51510A-page 18 2004 Microchip Technology Inc.
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-dep end ent )
0 C2 Output Filer Capacitor
Surface-mount (805 package)
(Optional - Application-dep end ent )
0 R1 Output Pull-up resistor
Surface-mount (805 package)
(Optional - Application-dep end ent )
0 R2 Output Pull-down resistor
Surface-mount (805 package)
(Optional - Application-dep end ent )
0 R3 Output inline resistor
Surface-mount (805 package)
(Optional - Application-dep end ent )
0V
0V
, VSS, V
DD
, VSS, V
DD
VDD, VSS and V
OUT
connector
VDD, VSS and V
OUT
connector
through-hole
OUT
surface-mount
OUT
Microchip
Technology Inc.
— User-specified
— User-specified
— User-specified
— User-specified
— User-specified
Keystone
Electrionics
Keystone
Electrionics
®
103-00030
User-specified
5012
5016
2004 Microchip Technology Inc. DS51510A-page 19
Voltage Supervisor SOT23 Evaluation Board User’s Guide
NOTES:
DS51510A-page 20 2004 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.
T able 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
1
V
OUT
V
DD
3
V
2
SS
Option 2 Option 3 Option 4
V
DD
1
VSSV
3
2
OUT
V
SS
3
1
V
V
DD
2
V
OUT
OUT
V
SS
3
1
2
V
DD
2004 Microchip Technology Inc. DS51510A-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 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.
L
Supported
on
) becomes possible (for the same system
L
Comment/
Recommended Component Values:
C2 = 1 µF Ceramic
C2 = 1 µF Tantalum
C2 = 1 µF to 10 µF
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
DS51510A-page 22 2004 Microchip Technology Inc.
LDO
C2
C
L
R3
Test Point
From Function
Generator
Appendix D. Revision History
D.1 INTRODUCTION
This Appendix documents the Revision History of this document
D.2 REVISION HISTORY
TABLE D-1: REVISION HISTORY
Rev Changes
A Initial Release of the Document
VOLTAGE SUPERVISOR
SOT23 EVALUATION BOARD
USER’ S GUIDE
2004 Microchip Technology Inc. DS51510A-page 23
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DS51510A-page 24 2004 Microchip Technology Inc.
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