MICROCHIP TC105_13

TC105
PFM/PWM Step-Down DC/DC Controller
Features
Package Type
•
•
•
•
57A (Typ) Supply Current
1A Output Current
0.5A Shutdown Mode
300kHz Switching Frequency for Small Inductor
Size
• Programmable Soft-Start
• 92% Typical Efficiency
• Small Package: 5-Pin SOT-23A
5-Pin SOT-23A
1
2
3
EXT
VDD
GND
General Description
The TC105 is a step-down (Buck) switching controller
that furnishes output currents of up to 1A (max) while
delivering a typical efficiency of 92%. The TC105
normally operates in pulse width modulation mode
(PWM), but automatically switches to pulse frequency
modulation (PFM) at low output loads for greater
efficiency. Oscillator frequency is 300kHz, allowing use
of small (22H) inductors. Supply current draw is only
102A (max), and is reduced to less than 0.5A when
the SHDN input is brought low. Regulator operation is
suspended during shutdown. The TC105 accepts a
maximum input voltage of 10V.
Device Selection Table
Output
Voltage
(V)*
4
NOTE: 5-Pin SOT-23A is equivalent to the EIAJ SC-74A
Palmtops
Battery-Operated Systems
Portable Instruments
Positive LCD Bias Generators
Portable Communicators
Hand-Held Scanners
5V to 3V Down Converters
Part
Number
SHDN
5
TC105
Applications
•
•
•
•
•
•
•
VOUT
Osc.
Freq.
(kHz)
Package
Operating
Temp.
Range
TC105503ECT
5.0
5-Pin SOT-23A
300
-40C to +85C
TC105333ECT
3.3
5-Pin SOT-23A
300
-40C to +85C
TC105303ECT
3.0
5-Pin SOT-23A
300
-40C to +85C
The TC105 is available in a small 5-Pin SOT-23A
package, occupies minimum board space and is ideal
for a wide range of applications.
*Other output voltages are available. Please contact
Microchip Technology Inc. for details.
Functional Block Diagram
L1 22µH (Sumida CD54)
3.3V
VOUT
RSS 470K
D1
MA737
5
4
VOUT
CSS
0.033µF
OFF ON
(From System
Control Logic)
C2
47µF
10V
Tantalum
SHDN
TC105333ECT
EXT
VDD
GND
1
2
3
Si 9430 P
+
VBATT
6V –
NiMH
C1 10µF/16V
3.3V Regulated Supply Using 6V
NiMH Battery Pack Input
 2001-2012 Microchip Technology Inc.
DS21349C-page 1
TC105
1.0
ELECTRICAL
CHARACTERISTICS
*Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. These
are stress ratings only and functional operation of the device
at these or any other conditions above those indicated in the
operation sections of the specifications is not implied.
Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.
Absolute Maximum Ratings*
Voltage on VDD ....................................... -0.3V to +12V
EXT Output Current ........................................±100mA
Voltage on VOUT, EXT,
SHDN Pins .....................................-0.3V to VDD +0.3V
Power Dissipation.............................................150mW
Operating Temperature Range.............-40°C to +85°C
Storage Temperature Range ..............-40°C to +125°C
TC105 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Note 1, fOSC = 300 kHz; TA = 25°C, unless otherwise noted.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
VDD
Operating Supply Voltage
2.2
—
10.0
V
VDDMIN
Minimum Input Voltage
0.9
—
2.2
V
EXT = High; No external components;
VOUT = 0V, SHDN = VIN
IDD
Operating Supply Current
—
—
57
67
102
122
A
No external components; VR = 3.0V, 3.3V
VOUT = 0V, SHDN = VIN VR = 5.0V
ISTBY
Standby Supply Current
—
—
15
16
27
29
A
No external components; VR = 3.0V, 3.3V
VR = 5.0V
VOUT = SHDN = VIN
ISHDN
Shutdown Supply Current
fOSC
Oscillator Frequency
VOUT
Output Voltage
DTYMAX Maximum Duty Cycle (PWM Mode)
—
—
0.5
A
SHDN = GND
255
300
345
kHz
VIN = VOUT + 0.3V
VR x 0.975
VR
VR x 1.025
100
—
—
%
Note 2
15
25
35
%
IOUT = 0mA
SHDN Input Logic High
0.65
—
—
V
VOUT = 0V, No external components
VIL
SHDN Input Logic Low
—
—
0.20
V
VOUT = 0V, No external components
REXTH
EXT ON Resistance to VDD
—
—
—
17
16
12
24
22
17

No external components; VR = 3.0V
VR = 3.3V
VR = 5.0V
VOUT = SHDN = VIN, VEXT = (VIN – 0.4V)
REXTL
EXT ON Resistance to GND
—
—
—
15
14
10
20
19
14

No external components; VR = 3.0V
VR = 3.3V
VR = 5.0V
VOUT = 0V, SHDN = VIN, VEXT = 0.4V

Efficiency
—
92
—
%
DTYPFM Duty Cycle (PFM Mode)
VIH
Note
1:
2:
VR = 3.0V, VIN = 4.5V, IOUT = 200mA
VR = 3.3V, VIN = 5.0V, IOUT = 220mA
VR = 5.0V, VIN = 7.5V, IOUT = 320mA
VR is the factory output voltage setting.
DS21349C-page 2
 2001-2012 Microchip Technology Inc.
TC105
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
Pin No.
(5-Pin SOT-23A)
Symbol
1
EXT
Description
Switch transistor control output. This terminal connects to the gate of an external P-channel
MOSFET (or to the base of an external PNP transistor through a current limiting resistor).
2
VDD
Power supply voltage input.
3
GND
Ground terminal.
4
SHDN
Shutdown input (active low). The device enters a low power shutdown state when this input is
brought low. During shutdown, regulator action is suspended, and supply current is reduced to
less than 0.5A. The device resumes normal operation when SHDN is again brought high.
5
VOUT
Voltage sense input. This input senses output voltage for regulation and must be connected to the
output voltage node as shown in the application schematic in this data sheet.
 2001-2012 Microchip Technology Inc.
DS21349C-page 3
TC105
3.0
DETAILED DESCRIPTION
The TC105 is a PFM/PWM step-down DC/DC
controller for use in systems operating from two or
more cells, or in line-powered applications. It uses
PWM as the primary modulation scheme, but automatically converts to PFM at output duty cycles less than
approximately 10%. The conversion to PFM provides
reduced supply current, and therefore higher operating
efficiency at low loads. The TC105 uses an external
switching transistor, allowing construction of switching
regulators with output currents of up to 1A.
The TC105 consumes only 102A, max, of supply
current when VIN = 5V and VOUT = 3.3V, and can be
placed in a 0.5A shutdown mode by bringing the
shutdown input (SHDN) low. The regulator remains
disabled while in shutdown mode, and output voltage
discharges to zero through the load. Normal operation
resumes when SHDN is brought high. Other features
include a built-in undervoltage lockout (UVLO) and
externally programmable soft start time.
3.1
Low Power Shutdown Mode
The TC105 enters a low power shutdown mode when
SHDN is brought low. While in shutdown, the oscillator
is disabled and the output switch is shut off. Normal
regulator operation resumes when SHDN is again
brought high. SHDN may be tied to the input supply if
not used.
3.2
Soft Start
Soft start allows the output voltage to gradually ramp
from 0 to rated output value during start-up. This action
minimizes (or eliminates) overshoot, and in general,
reduces stress on circuit components. Figure 4-1
shows the circuit required to implement soft start
(values of 470K and 0.033F for RSS and CSS
respectively, are adequate for most applications).
3.3
Undervoltage Lockout (UVLO)
The TC105 is disabled when VIN is below the undervoltage lockout threshold. This threshold is equal to the
guaranteed minimum operating voltage for the TC105
(i.e., 2.2V). When UVLO is active, the TC105 is
completely disabled.
DS21349C-page 4
3.4
Input Bypass Capacitors
Using an input bypass capacitor reduces peak current
transients drawn from the input supply and reduces the
switching noise generated by the regulator. The source
impedance of the input supply determines the size of
the capacitor that should be used.
3.5
Output Capacitor
The effective series resistance of the output capacitor
directly affects the amplitude of the output voltage
ripple. (The product of the peak inductor current and
the ESR determines output ripple amplitude.) Therefore, a capacitor with the lowest possible ESR should
be selected. Smaller capacitors are acceptable for light
loads or in applications where ripple is not a concern.
The Sprague 595D series of tantalum capacitors are
among the smallest of all low ESR surface mount
capacitors available. Table 4-1 lists suggested
components and suppliers.
3.6
Inductor Selection
Selecting the proper inductor value is a trade-off
between physical size and power conversion requirements. Lower value inductors cost less, but result in
higher ripple current and core losses. They are also
more prone to saturate since the coil current ramps
faster and could overshoot the desired peak value. This
not only reduces efficiency, but could also cause the
current rating of the external components to be
exceeded. Larger inductor values reduce both ripple
current and core losses, but are larger in physical size
and tend to increase the start-up time slightly.
A 22H inductor is recommended as the best overall
compromise. For highest efficiency, use inductors with
a low DC resistance (less than 20 m). To minimize
radiated noise, consider using a toroid, pot core or
shielded-bobbin inductor.
3.7
Output Diode
The high operating frequency of the TC105 requires a
high-speed diode. Schottky diodes such as the MA737
or 1N5817 through 1N5823 (and the equivalent surface
mount versions) are recommended. Select a diode
whose average current rating is greater than the peak
inductor current and whose voltage rating is higher
than VDDMAX.
 2001-2012 Microchip Technology Inc.
TC105
3.8
External Switching Transistor
Selection
EXT is a complementary output with a maximum ON
resistance of 22 to VDD when high and 19 to ground
when low. It is designed to directly drive a P-channel
MOSFET or a PNP bipolar transistor through a base
current limiting resistor (Figure 4-2). A PNP transistor is
recommended in applications where VIN is less than
2.5V. Otherwise, a P-channel MOSFET is preferred as
it affords the highest efficiency because it does not
draw any gate drive current. However, P-channel
MOSFETs are typically more expensive than bipolar
transistors.
3.8.1
BOARD LAYOUT GUIDELINES
As with all inductive switching regulators, the TC105
generates fast switching waveforms, which radiate
noise. Interconnecting lead lengths should be minimized to keep stray capacitance, trace resistance and
radiated noise as low as possible. In addition, the GND
pin, input bypass capacitor and output filter capacitor
ground leads should be connected to a single point.
The input capacitor should be placed as close to power
and ground pins of the TC105 as possible. The length
of the EXT trace must also be kept as short as possible.
P-channel MOSFET selection is determined mainly by
the on-resistance, gate-source threshold, and gate
charge requirements. Also, the drain-to-source and
gate-to-source breakdown voltage ratings must be
greater than VDDMAX. The total gate charge specification should be less than 100nC for best efficiency. The
MOSFET must be capable of handling the required
peak inductor current, and should have a very low
on-resistance at that current. For example, an Si9430
MOSFET has a drain-to-source rating of -20V, and a
typical on-resistance rDSON of 0.07 at 2A, with VGS =
-4.5V. Table 4-1 lists suppliers of external components
recommended for use with the TC105.
 2001-2012 Microchip Technology Inc.
DS21349C-page 5
TC105
4.0
APPLICATIONS
4.1
Circuit Examples
FIGURE 4-1:
SOFT START CIRCUIT
RSS
470K
Figure 4-3 shows a TC105 using a PNP switching
transistor (Zetex FZT749) that has an hFE of 180 and
VCESAT of 100 mV at IC = 1A. Other high beta transistors can be used, but the values of RB and CB may
need adjustment if hFE is significantly different from that
of the FZT749.
+
–
4
VIN
CSS
0.033µF
SHDN/SS
TC105
The circuit of Figure 4-4 utilizes a P-channel MOSFET
switching transistor (Silconix Si9430). This transistor is
a member of the Littlefoot™ family of small outline
MOSFETs.
Shutdown Not Used
RSS
470K
SHDN
+
4
–
CSS
0.033µF
SHDN/SS
OFF ON
(From System
Control Logic)
TC105
Shutdown Used
FIGURE 4-2:
VIN
EXTERNAL TRANSISTOR CONNECTION
L
P
L
+
–
D
TC105
Q
VIN
+
CL
D
RB
+
–
–
VOUT
CL
CB
TC105
EXT
EXT
1
1
P-Channel MOSFET
DS21349C-page 6
VOUT
PNP Bipolar Transistor
 2001-2012 Microchip Technology Inc.
TC105
FIGURE 4-3:
REGULATOR USING PNP TRANSISTOR
FZ749
Q1
VIN
2.5V
22µH
Sumida CD-54
+
+
10µF
16V –
MA737
47µF
10V Tantalum
–
RSS
470K
OFF ON
RB
500
CSS
0.033µF
SHDN/SS
VOUT
+
CB
2200 pF –
+
–
4
5
FIGURE 4-4:
VOUT
1.8V
TC105
EXT
VDD
GND
1
2
3
REGULATOR USING P-CHANNEL MOSFET
Si9430
P
22µH
Sumida CD-54
VIN
+
10µF
16V –
VOUT
+
MA737
47µF
10V Tantalum
–
+
4
5
VOUT
–
RSS
470K
OFF ON
CSS
0.033µF
SHDN/SS
TC105
TABLE 4-1:
Type
Surface Mount
EXT
VDD
GND
1
2
3
SUGGESTED COMPONENTS AND SUPPLIERS
Inductors
Sumida
CD54 Series
CDRH Series
Coilcraft
DO Series
Capacitors
Transistors
AVX
TPS Series
ON Semiconductor
MBRS340T3
Silconix
Little Foot MOSFET Series
Sprague
595D Series
Nihon
NSQ Series
Zetex FZT749
PNP Bipolar Transistor
Matsushita
MA737
Toshiba 2SA1213 PNP
Transistor
Miniature
Through-Hole
Sumida
RCH Series
Sanyo
OS-CON Series
Standard
Through-Hole
Coilcraft
PCH Series
Nichicon
PL Series
Coiltronics
CTX Series
United Chemi-Con
LXF Series
 2001-2012 Microchip Technology Inc.
Diodes
IRC
OAR Series
ON Semiconductor
TMOS Power MOSFETs
(i.e., MTP30P06V)
DS21349C-page 7
TC105
5.0
PACKAGING INFORMATION
5.1
Package Marking Information
1
represents product classification; TC105 = M
2
represents first integer of voltage
4
Symbol (300kHz)
Voltage
1
2
3
4
5
6
1.
2.
3.
4.
5.
6.
DS21349C-page 8
3
represents first decimal of voltage
Symbol (300kHz)
Voltage
A
B
C
D
E
F
H
K
L
M
.0
.1
.2
.3
.4
.5
.6
.7
.8
.9
represents production lot ID code
 2001-2012 Microchip Technology Inc.
TC105
5.2
Taping Form
Component Taping Orientation for 5-Pin SOT-23A (EIAJ SC-74A) Devices
User Direction of Feed
Device
Marking
W
PIN 1
P
Standard Reel Component Orientation
TR Suffix Device
(Mark Right Side Up)
Carrier Tape, Number of Components Per Reel and Reel Size
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
8 mm
4 mm
3000
7 in
5-Pin SOT-23A
5.3
Package Dimensions
Note:
For the most current package drawings, please see the Microchip Packaging Specification located
at http://www.microchip.com/packaging
SOT-23A-5
.075 (1.90)
REF.
.071 (1.80)
.059 (1.50)
.122 (3.10)
.098 (2.50)
.020 (0.50)
.012 (0.30)
PIN 1
.037 (0.95)
REF.
.122 (3.10)
.106 (2.70)
.057 (1.45)
.035 (0.90)
.006 (0.15)
.000 (0.00)
.010 (0.25)
.004 (0.09)
10° MAX.
.024 (0.60)
.004 (0.10)
Dimensions: inches (mm)
 2001-2012 Microchip Technology Inc.
DS21349C-page 9
TC105
REVISION HISTORY
Revision C (November 2012)
Added a note to the package outline drawing.
DS21349C-page 10
 2001-2012 Microchip Technology Inc.
TC105
Sales and Support
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1.
2.
Your local Microchip sales office
The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
New Customer Notification System
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
 2001-2012 Microchip Technology Inc.
DS21349C-page11
TC105
NOTES:
DS21349C-page12
 2001-2012 Microchip Technology Inc.
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, dsPIC,
FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,
PICSTART, PIC32 logo, rfPIC, SST, SST Logo, SuperFlash
and UNI/O are registered trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MTP, SEEVAL and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
Analog-for-the-Digital Age, Application Maestro, BodyCom,
chipKIT, chipKIT logo, CodeGuard, dsPICDEM,
dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O,
Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA
and Z-Scale 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.
GestIC and ULPP are registered trademarks of Microchip
Technology Germany II GmbH & Co. & KG, a subsidiary of
Microchip Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2001-2012, Microchip Technology Incorporated, Printed in
the U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 9781620767481
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
 2001-2012 Microchip Technology Inc.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, 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.
DS21349C-page 13
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://www.microchip.com/
support
Web Address:
www.microchip.com
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Harbour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431
India - Bangalore
Tel: 91-80-3090-4444
Fax: 91-80-3090-4123
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
India - Pune
Tel: 91-20-2566-1512
Fax: 91-20-2566-1513
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
Japan - Osaka
Tel: 81-66-152-7160
Fax: 81-66-152-9310
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
Boston
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
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
Indianapolis
Noblesville, IN
Tel: 317-773-8323
Fax: 317-773-5453
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: 86-10-8569-7000
Fax: 86-10-8528-2104
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
China - Chongqing
Tel: 86-23-8980-9588
Fax: 86-23-8980-9500
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
China - Hangzhou
Tel: 86-571-2819-3187
Fax: 86-571-2819-3189
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-213-7828
Fax: 886-7-330-9305
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Taipei
Tel: 886-2-2508-8600
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
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
DS21349C-page 14
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Japan - Yokohama
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
10/26/12
 2001-2012 Microchip Technology Inc.