SOT23-5
Voltage Regulator
Evaluation Board
User’s Guide
© 2009 Microchip Technology Inc.
DS51811A
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Printed on recycled paper.
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DS51811A-page ii
© 2009 Microchip Technology Inc.
SOT23-5 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 SOT23-5 Voltage Regulator Evaluation Board? .......................... 5
1.3 What the SOT23-5 Voltage Regulator Evaluation Board kit includes? .......... 7
Chapter 2. Installation and Operation
2.1 ntroduction ...................................................................................................... 9
2.2 Features ......................................................................................................... 9
2.3 Getting Started ............................................................................................. 10
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 13
A.2 Board - Schematic ....................................................................................... 14
A.3 Board - Top Silk and Pads ........................................................................... 15
A.4 Board - Top Copper ..................................................................................... 16
A.5 Board - Bottom Copper ................................................................................ 17
Appendix B. Bill of Materials (BOM)
Worldwide Sales and Service .................................................................................... 20
© 2009 Microchip Technology Inc.
DS51811A-page iii
SOT23-5 Voltage Regulator Evaluation Board User’s Guide
NOTES:
DS51811A-page iv
© 2009 Microchip Technology Inc.
SOT23-5 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® IDE on-line help.
Select the Help menu, and then Topics to open a list of available on-line help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
SOT23-5 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 SOT23-5 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” – Important information about the SOT23-5
Voltage Regulator Evaluation Board.
• Chapter 2. “Installation and Operation” – This chapter includes a detailed
description of each function of the demo board and instructions for how to begin
using the board.
• Appendix A. “Schematic and Layouts”– Shows the schematic and layout
diagrams for the SOT23-5 Voltage Regulator Evaluation Board.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
SOT23-5 Voltage Regulator Evaluation Board.
© 2009 Microchip Technology Inc.
DS51811A-page 1
SOT23-5 Voltage Regulator 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
A window
A dialog
A menu selection
A field name in a window or
dialog
A menu path
MPLAB® IDE User’s Guide
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
Initial caps
Quotes
Underlined, italic text with
right angle bracket
Bold characters
N‘Rnnnn
Text in angle brackets < >
Courier New font:
Plain Courier New
Represents code supplied by
user
DS51811A-page 2
Examples
File>Save
Press <Enter>, <F1>
var_name [,
var_name...]
void main (void)
{ ...
}
© 2009 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use SOT23-5 Voltage Regulator Evaluation Board.
Other useful documents are listed below. The following Microchip documents are
available and recommended as supplemental reference resources.
MCP1801 Data Sheet - “150 mA, High PSRR, Low Quiescent Current LDO”,
DS22051
MCP1802 Data Sheet - “300 mA, High PSRR, Low Quiescent Current LDO”,
DS22053
TC1014/1015/1185 Data Sheet - “50 mA, 100 mA and 150 mA CMOS LDOs with
Shutdown and Reference Bypass”, DS21335
These datasheets provide useful information regarding voltage regulator parameters
that may be validated using this evaluation board.
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web
site is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the web site contains the following
information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.
Technical support is available through the web site at: http://support.microchip.com.
DOCUMENT REVISION HISTORY
Revision A (April 2009)
• Initial Release of this Document.
© 2009 Microchip Technology Inc.
DS51811A-page 3
SOT23-5 Voltage Regulator Evaluation Board User’s Guide
NOTES:
DS51811A-page 4
© 2009 Microchip Technology Inc.
SOT23-5 VOLTAGE REGULATOR
EVALUATION BOARD USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
The SOT23-5 Voltage Regulator Evaluation Board is designed to provide functional
evaluation of Microchip Voltage Regulators that utilize the SOT23-5 package and the
following device pinouts:
PIN Number
U1 Pad Function
U2 Pad Function
1
SHDN
VIN
2
VIN
GND
3
GND
SHDN
4
VOUT
PWRGD / ADJ
5
PWRGD / ADJ
VOUT
The SOT23-5 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 SOT23-5 Voltage Regulator Evaluation Board is based upon a modulare 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.
1.2
WHAT IS THE SOT23-5 VOLTAGE REGULATOR EVALUATION BOARD?
The SOT23-5 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 SOT23-5 Voltage Regulator Evaluation Board can be broken up into six functional
blocks. These blocks are:
•
•
•
•
•
•
Input Capacitance
Shutdown Control
Ground Current Measurement
Voltage Adjust
Power Good
Load Resistor
© 2009 Microchip Technology Inc.
DS51811A-page 5
SOT23-5 Voltage Regulator Evaluation Board User’s Guide
1.2.2
Input Capacitance
Jumper JP1 connects the input capacitance to the circuit. The input capacitor is
disconnected when performing Power Supply Ripple Rejection tests. By default, C1 is
populated with a 1 µF, 50V, XR7 ceramic capacitor.
1.2.3
Shutdown Control
Jumper JP2 allows the user to select the Shutdown (SHDN) pin voltage level. The
voltage level may be set to VIN, GND or open, depending on the placement of the JP2
jumper. When the jumper is not connecting pins 1 and 2 or pins 2 and 3 of JP2, the
voltage level may be set by attaching a signal to TP5. This allows the user to enable,
disable or pulse the shutdown pin of the device.
The board comes with R1 populated with a 10 kΩ resistor.
1.2.4
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.
1.2.5
Voltage Adjust
For Adjustable Output Voltage devices, R2 and R3 may be populated with appropriate
values to provide the desired output voltage.
The board comes with R2 populated with a 69.8 kΩ resistor.
1.2.6
Power Good (PWRGD)
For devices with a Power Good (PWRGD) output, either R2 or R4 is populated
depending on the desired pull-up source voltage.
R2 selects VOUT as the pull-up source voltage.
R4 selects VIN as the pull-up source voltage.
The board comes with R2 populated with a 69.8 kΩ resistor.
1.2.7
Load Resistor
R5 may be populated with the desired load resistor values for the device being
evaluated. Jumper JP4 connects R5 to the device output.
1.2.8
Output Capacitor
C2 may be populated with the desired output capacitance. By default, C2 is populated
with a 1 µF, 6.3V, XR7 ceramic capacitor.
1.2.9
Bypass Capacitor
C3 may be populated with the desired bypass capacitance.
1.2.10
Power Supply
J1 or TP1 and TP2 are connected to the user’s power supply.
DS51811A-page 6
© 2009 Microchip Technology Inc.
Product Overview
1.3
WHAT THE SOT23-5 VOLTAGE REGULATOR EVALUATION BOARD KIT
INCLUDES?
This SOT23-5 Voltage Regulator Evaluation Board kit includes:
• One SOT23-5 Voltage Regulator Evaluation Board -102-00201
• Important Information "Read First"
© 2009 Microchip Technology Inc.
DS51811A-page 7
SOT23-5 Voltage Regulator Evaluation Board User’s Guide
NOTES:
DS51811A-page 8
© 2009 Microchip Technology Inc.
SOT23-5 VOLTAGE REGULATOR
EVALUATION BOARD USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The SOT23-5 Voltage Regulator Evaluation Board is designed to be used to facilitate
the evaluation of Microchip’s voltage regulators, or to be used as a standalone voltage
regulator board. Jumpers have been placed on the board to facilitate testing of specific
voltage regulator parameters. The jumpers may also be used to select pull-up and pulldown voltage levels.
The SOT23-5 Voltage Regulator Evaluation Board kit comes with a 1 uF ceramic input
and output capacitor soldered to the board. A 10K resistor in series with the SHDN pin
is also populated on the board. The PWRGD/ADJ pin has a 69.8 kΩ resistor soldered
to the board. The board has three more unpopulated resistor locations that may be
used for loads and voltage adjustments. The board also has an unpopulated location
that may be used for bypass capacitance.
2.2
FEATURES
The SOT23-5 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
• Jumper to select load resistor
• Jumper to select shutdown pin input: VDD, GND, or use testpoint
• Jumper to connect input capacitor to circuit
• SMT0805 PCB footprints for user Power Good pull-up resistor
• SMT0805 PCB footprints for user Adjustable Voltage resistor divider
• SMT0805 PCB footprints for user Bypass Capacitor
© 2009 Microchip Technology Inc.
DS51811A-page 9
SOT23-5 Voltage Regulator Evaluation Board User’s Guide
2.3
GETTING STARTED
The SOT23-5 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 SOT23-5 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 resistor to R5.
2. Remove jumpers JP3 and JP4.
3. Connect an ammeter across testpoints TP6(+) and TP7(-). Select the
appropriate meter scale for the evaluated device.
4. Connect a voltmeter across testpoints TP9(+) and TP10(-).
5. Add jumper JP1.
6. Add jumper JP2 to pins 1 and 2.
7. Apply source voltage to testpoints TP1(+) and TP2(-).
8. Verify the voltage across testpoints TP9 and TP10 is within the expected range
of the device being tested.
9. Read the Ground Current directly from the ammeter connected to testpoints TP6
and TP7.
10. 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.
11. Add the load selection jumper, JP4.
12. Read the Ground Current directly from the ampere meter connected to testpoints
TP6 and TP7.
13. The data collected will be the ground current versus load current.
2.3.2
Adjustable Output Voltage (ADJ)
The output voltage of some adjustable voltage regulators may be adjusted by selecting
appropriate resistor divider values connected to the Adjust (ADJ) pin. R2 and R3 pads
are available to be used as the voltage divider.
2.3.3
Shutdown input selection (SHDN)
The Shutdown (SHDN) input selection may be set to VIN, GND, or a user supplied
voltage using testpoint TP5. To select VIN as the SHDN voltage, place a jumper across
pins JP2-1 and JP2-2. To select GND as the SHDN voltage, place a jumper across pins
JP-2 and JP-3. To select a user specified input such as a function generator, remove
the jumper from JP2 and connect the external voltage source positive lead (+) to
testpoint TP5 and the negative lead (-) to testpoint TP4.
DS51811A-page 10
© 2009 Microchip Technology Inc.
Installation and Operation
2.3.4
Power Good (PWRGD)
The Power Good (PWRGD) output pin has the ability to be pulled up to either SHDN
or VOUT. Populating R2 (and removing R4) with the desired pull-up resistor causes
PWRGD to be pulled up to VOUT. Populating R4 (and removing R2) with the desired
pull-up resistor causes PWRGD to be pulled up to VIN.
When PWRGD is pulled up to VOUT, the device current will be minimal when SHDN is
active. When PWRGD is pulled up to VIN, the device current will be higher when when
SHDN is active because the current will flow threw R4 and the PWRGD pin to ground.
When low operating currents are critical, PWRGD should be pulled up to VOUT. That
will keep current consumption at a minimum when SHDN is active because the output
voltage will be low.
2.3.5
Load Resistance
R5 is used to set the desired load value. Jumper JP4 is used to connect or disconnect
the load resistance to the output.
2.3.6
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 R5 and JP4. The input voltage is then 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
2.3.7
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.
2.3.8
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 SOT23-5 Voltage
Regulator Evaluation Board. The PSRR analyzer may then sweep the input voltage
frequencies and record the corresponding output voltages.
© 2009 Microchip Technology Inc.
DS51811A-page 11
SOT23-5 Voltage Regulator Evaluation Board User’s Guide
NOTES:
DS51811A-page 12
© 2009 Microchip Technology Inc.
SOT23-5 VOLTAGE REGULATOR
EVALUATION BOARD USER’S GUIDE
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the SOT23-5 Voltage
Regulator Evaluation Board:
•
•
•
•
Board - Schematic
Board - Top Silk and Pads
Board - Top Copper
Board - Bottom Copper
© 2009 Microchip Technology Inc.
DS51811A-page 13
Input Voltage
( 0V to 50V)
DS51811A-page 14
Bypass
Pwrgd/Error
Revision Notes
Initial Release
Gnd
Vout
Output Voltage
( 0V to 6.0V )
Date
18-FEB-2008
A.2
Adj
Adj
3.3V OUT
REV
1
SOT23-5 Voltage Regulator Evaluation Board User’s Guide
BOARD - SCHEMATIC
© 2009 Microchip Technology Inc.
Schematic and Layouts
A.3
BOARD - TOP SILK AND PADS
© 2009 Microchip Technology Inc.
DS51811A-page 15
SOT23-5 Voltage Regulator Evaluation Board User’s Guide
A.4
BOARD - TOP COPPER
DS51811A-page 16
© 2009 Microchip Technology Inc.
Schematic and Layouts
A.5
BOARD - BOTTOM COPPER
© 2009 Microchip Technology Inc.
DS51811A-page 17
SOT23-5 Voltage Regulator Evaluation Board User’s Guide
NOTES:
DS51811A-page 18
© 2009 Microchip Technology Inc.
SOT23-5 VOLTAGE REGULATOR
EVALUATION BOARD USER’S GUIDE
Appendix B. Bill of Materials (BOM)
TABLE B-1:
Qty
BILL OF MATERIALS (BOM)
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® Electronics
Corp
C0805C105K4RACTU
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)
3M
929835-01-36-RK
3
JP1, JP3,
JP4
2 pin header, 0.100 centers, 0.025 sq pins, Molex® Electronics
0.070 pcb to pin center height, 36 pins to a
strip (yields 18 headers)
22-28-4360
1
JP2
3 pin header, 0.100 centers, 0.025 sq pins, Molex Electronics
0.070 pcb to pin center height, 36 pins to a
strip (yields 12 headers)
22-28-4360
4
JP1-JP4
Connector, Jumper Shorting, Tin
Sullins
STC02SYAN
4
On Each
Corner
Bumpon Hemisphere, 0.44 x 0.20, Black
3M
SJ-5003 (BLACK)
1
P1
RA socket, 0.100 centers, 0.025 sq pins,
0.070 pcb to pin center height
Sullins
PPPC021LGBN-RC
1
PCB
RoHS Compliant Bare PCB, SOT23-5
Voltage Regulator Evaluation
Board(250 boards, 4wk delivery)
Advanced Circuits
104-000201
1
R1
10K Res, Smt 0805, 1%, 1/8W
Rohm
MCR10EZHF1002
1
R2
69.8K Res, Smt 0805, 1%, 1/8W
Rohm
MCR10EZHF6982
3
R3, R4,
R5
DO NOT POPULATE
—
—
10
TP1-TP10 SMT Testpoint
Keystone
Electronics®
5016
2
U1, U2
—
—
Note 1:
DO NOT POPULATE
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.
© 2009 Microchip Technology Inc.
DS51811A-page 19
WORLDWIDE SALES AND SERVICE
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
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
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Cleveland
Independence, OH
Tel: 216-447-0464
Fax: 216-447-0643
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
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: 86-28-8665-5511
Fax: 86-28-8665-7889
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Hsin Chu
Tel: 886-3-6578-300
Fax: 886-3-6578-370
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
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
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
03/26/09
DS51811A-page 20
© 2009 Microchip Technology Inc.