MICROCHIP MTD6505

MTD6505
Sinusoidal Sensorless 3-Phase Brushless DC Fan Motor Driver
Features
Description
• 180° Sinusoidal Drive, for high efficiency and low
acoustic noise
The MTD6505 device is a 3-phase full-wave
sensorless driver for brushless DC (BLDC) motors. It
features 180° sinusoidal drive, high torque output and
silent drive. With the adaptive features, parameters and
wide range of power supplies (2V to 5.5V), the
MTD6505 is intended to cover a broad range of motor
characteristics, while requiring minimum external
components. Speed control can be achieved through
either power supply modulation (PSM) or pulse-width
modulation (PWM).
• Position Sensorless BLDC Drivers
(No Hall-effect sensor required)
• Integrated Power Transistors
• Supports 2V to 5.5V Power Supplies
• Programming Resistor (RPROG) setting to fit motor
constant (Km) range from 3.25 mV/Hz to
52 mV/Hz
• Direction Control:
- Forward direction: connect DIR pin to GND or
leave floating
- Reverse direction: connect DIR pin to VBIAS
or 3V
• Speed Control through Power Supply Modulation
(PSM) and/or Pulse-Width Modulation (PWM)
• Built-in Frequency Generator (FG Output Signal)
• Built-in Lockup Protection and Automatic
Recovery Circuit
• Built-in Overcurrent Limitation
• Built-in Thermal Shutdown Protection
• Built-in Over Voltage Protection
The compact packaging and the minimal bill-ofmaterial make the MTD6505 device extremely cost
efficient in fan applications. For example, the CPU
cooling fans in notebook computers require designs
that provide low acoustic noise, low mechanical
vibration, and are highly efficient. The frequency
generator (FG) output enables precision speed control
in closed-loop applications.
The MTD6505 device includes Lockup Protection
mode to turn off the output current when the motor is in
a lock condition, with an automatic recovery feature to
restart the fan when the lock condition is removed.
Motor overcurrent limitation and thermal shutdown
protection are included for safety enhanced operations.
The MTD6505 is available in a compact, thermally
enhanced, 3mm x 3mm 10-lead UDFN package.
• No External Tuning Required
• Available Package
10-Lead 3mm x 3mm UDFN
Package Types
MTD6505
3x3 UDFN*
Applications
• Notebook CPU Cooling Fans
• 5V 3-Phase BLDC Motors
FG 1
RPROG 2
VBIAS 3
OUT1 4
OUT2 5
10 PWM
EP
11
9 DIR
8 VDD
7 OUT3
6 GND
*Includes Exposed Thermal Pad (EP); see Table 3-1.
 2011 Microchip Technology Inc.
DS22281A-page 1
MTD6505
Functional Block Diagram
VBIAS
VDD
VDD
CPU + peripherals
PWM
Output Drive Circuit
FG
OUT3
OUT2
OUT1
DIR
GND
Non-volatile
memory
RPROG
DS22281A-page 2
RPROG sense
Adjustable
Km
Thermal
protection
Short-circuit
protection
Overcurrent
protection
Motor Phase
Detection
Circuit
 2011 Microchip Technology Inc.
MTD6505
Typical Application
VDD
Km0 Km1,2 Km3
VBIAS VBIAS
R1
RPROG
VBIAS
C2
1
2
3
OUT1
4
OUT2
5
MTD6505
FG
R2
10
PWM
9
DIR
8
VDD
VDD
7
OUT3
6
GND
C1
Recommended External Components for Typical Application
Element
Type/Value
C1
>1 µF
Connect as close as possible to IC input pins.
C2
>1 µF
Connect as close as possible to IC input pins.
R1
>10 kΩ
R2
3.9 kΩ or 24 kΩ
 2011 Microchip Technology Inc.
Comment
Connect to Vlogic on microcontroller side (FG Pull-Up).
Select appropriate programming resistor value, see
Table 4-2: Km Settings.
DS22281A-page 3
MTD6505
NOTES:
DS22281A-page 4
 2011 Microchip Technology Inc.
MTD6505
1.0
ELECTRICAL
CHARACTERISTICS
† Notice: Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of
the device at those or any other conditions above those
indicated in the operational listings of this specification
is not implied. Exposure to maximum rating conditions
for extended periods may affect device reliability.
Absolute Maximum Ratings†
Power Supply Voltage (VDD_MAX) ...................... -0.7 to +7.0V
Maximum Output Voltage (VOUT_MAX) ............... -0.7 to +7.0V
Note 1: Reference PCB, according
standard EIA/JESD 51-9.
Maximum Output Current(2) (IOUT_MAX) ....................1000 mA
FG Maximum Output Voltage (VFG_MAX) ........... -0.7 to +7.0V
to
JEDEC
2: IOUT is also internally limited, according to the
limits
defined
in
the
Electrical
Characteristics table.
FG Maximum Output Current (IFG_MAX) ......................5.0 mA
VDD Maximum Voltage (VDD_MAX) ..................... -0.7 to +4.0V
PWM Maximum Voltage (VPWM_MAX) ................ -0.7 to +7.0V
Allowable Power Dissipation(1)(PD_MAX).........................1.5W
Max Junction Temperature (TJ)................................... +150°C
ESD protection on all pins 2 kV
ELECTRICAL CHARACTERISTICS
Electrical Specifications: Unless otherwise specified, all limits are established for VDD = 5.5V to 2.0V, TA = +25°C
Parameters
Sym
Min
Typ
Max
Units
Conditions
Power Supply Voltage
VDD
2
—
5.5
V
Power Supply Current
IVDD
—
5
10
mA
VDD = 5V
IVDD_STB
—
30
40
µA
PWM = 0V, VDD = 5V
(Standby mode)
OUT1 High Resistance
RON(H)
—
0.75
—
Ω
IOUT = 0.5A, VDD = 5V
OUT2 Low Resistance
RON(L)
—
0.75
—
Ω
IOUT = 0.5A, VDD = 5V
OUT3 Total Resistance
RON(H+L)
—
1.5
—
Ω
IOUT = 0.5A, VDD = 5V
VBIAS Internal
Supply Voltage
VBIAS
—
3
—
V
VDD = 3.2V to 5.5V
—
VDD – 0.2
—
V
VDD < 3.2V
PWM Input Frequency
fPWM
1
—
100
kHz
PWM Input H Level
VPWM_H
0.55*VDD
—
VDD
V
VDD  4.5V
PWM Input L Level
VPWM_L
0
—
0.2*VDD
V
VDD  4.5V
PWM Internal Pull-Up
Resistor
RPWM_0
—
266
—
kΩ
PWM = 0V
PWM Internal Pull-Up
Resistor
RPWM
—
133
—
kΩ
PWM duty-cycle > 0%
DIR Input H Level
VDIR_H
0.55*VDD
—
VDD
V
VDD  4.5V
DIR Input L Level
VDIR_L
0
—
0.2*VDD
V
VDD  4.5V
RDIR
100
—
200
kΩ
FG Output Pin Low
Level Voltage
VOL_FG
—
—
0.25
V
IFG = -1 mA
FG Output Pin Leakage
Current
ILH_FG
-10
—
10
µA
VFG = 5.5V
Standby Current
DIR Internal Pull-Down
Resistor
Note 1:
2:
750 mA is the standard option for MTD6505. Additional overcurrent protection levels are available upon
request. Please contact factory for different overcurrent protection values.
Related to the internal oscillator frequency (see Figure 2-1)
 2011 Microchip Technology Inc.
DS22281A-page 5
MTD6505
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise specified, all limits are established for VDD = 5.5V to 2.0V, TA = +25°C
Parameters
Sym
Min
Typ
Max
Units
Lock Protection
Operating Time
TRUN
—
0.5
—
s
Lock Protection Waiting
Time
TWAIT
4.5
5
5.5
s
Overcurrent Protection
IOC_MOT
—
750
—
mA
Overvoltage Protection
VOV
—
7.2
—
V
Short Protection on
High Side
IOC_SW_H
—
2.57
—
A
Short Protection on
Low Side
IOC_SW_L
—
-2.83
—
A
Thermal Shutdown
TSD
—
170
—
°C
Thermal Shutdown
Hysteresis
TSD_HYS
—
25
—
°C
Note 1:
2:
Conditions
Note 2
750 mA is the standard option for MTD6505. Additional overcurrent protection levels are available upon
request. Please contact factory for different overcurrent protection values.
Related to the internal oscillator frequency (see Figure 2-1)
TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise specified, all limits are established for VDD = 5.5V to 2.0V, TA = +25°C.
Parameters
Sym
Min
Typ
Max
Units
Operating Temperature
TOPR
-40
—
+125
°C
Storage Temperature Range
TSTG
-55
—
+150
°C
JA
—
96.6
—
°C/W
Conditions
Temperature Ranges
Thermal Package Resistances
Thermal Resistance, 10L-UDFN
DS22281A-page 6
 2011 Microchip Technology Inc.
MTD6505
2.0
TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless indicated, TA = +25°C, VDD = 5.5V to 2.0V, OUT1, 2, 3 and PWM open.
2.5
Oscillator
or Frequeny Deviation
(%)
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-4
-4.5
VDD = 5.5V
VDD
V
5.5
DD ==5.5V
2
PWM VIL (V)
VDD = 2V
1.5
1
VDD = 2V
0.5
0
-40 -25 -10 5
20 35 50 65 80 95 110 125
-40 -25 -10 5
FIGURE 2-4:
Temperature.
FIGURE 2-1:
Oscillator Frequency
Deviation vs. Temperature.
3.14
3
3.12
2.5
PWM VIH (V)
VBIAS (V)
3.1
3.08
3.06
3 04
3.04
Inputs (PWM, DIR) VIL vs.
VDD = 5.5V
2
1.5
1
VDD = 2V
0.5
3.02
3
0
-40 -25 -10 5
20 35 50 65 80 95 110 125
Temperature (C°)
FIGURE 2-2:
Internal Regulated Voltage
(VBIAS) vs Temperature.
-40 -25 -10 5
FIGURE 2-5:
Temperature.
3.5
RON High Side ()
3
2.5
VBIAS (V)
20 35 50 65 80 95 110 125
Temperature (C°)
Temperature (C°)
2
1.5
1
0.5
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VDD(V)
FIGURE 2-3:
Internal Regulated Voltage
(VBIAS) vs Supply Voltage (VDD).
 2011 Microchip Technology Inc.
6
5.5
5
4.5
4
3.5
3
2.5
2
15
1.5
1
0.5
0
20 35 50 65 80 95 110 125
Temperature (C°)
Inputs (PWM, DIR) VIH vs.
VDD = 2V
VDD = 5.5V
-40 -25 -10 5
20 35 50 65 80 95 110 125
Temperature (C°)
FIGURE 2-6:
Outputs RON High Side
Resistance vs. Temperature.
DS22281A-page 7
MTD6505
Note: Unless indicated, TA = +25°C, VDD = 5.5V to 2.0V, OUT1, 2, 3 and PWM open.
60
IVDD_STB
D_STB Current (μA)
RON
ON Low Side ()
6
5.5
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
VDD = 2V
VDD = 5.5V
50
40
30
20
-40 -25 -10 5
5 20 35 50 65 80 95 110 125
Temperature (C°)
FIGURE 2-7:
Outputs RON Low Side
Resistance vs. Temperature.
20 35 50 65 80 95 110 125
Temperature (C°)
FIGURE 2-9:
Temperature.
7
Stand-By Current vs.
PWM Pull-Up Current (μA)
0
6
IVDD Current (mA)
VDD = 2V
10
0
-40 -25 -10
VDD = 5.5V
5
4
VDD = 2V
3
2
1
-5
-10
VDD = 2V
-15
-20
-25
-30
VDD = 5.5V
-35
-40
0
-40 -25 -10
5
FIGURE 2-8:
Temperature.
3.0
VDD = 5.5V
-40 -25 -10 5
20 35 50 65 80 95 110 125
Temperature (C°)
Supply Current vs.
20 35 50 65 80 95 110 125
Temperature (C°)
FIGURE 2-10:
Temperature.
PWM Pull-Up Current vs.
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
MTD6505 PIN FUNCTION TABLE
Pin
Number
Type
Name
1
O
FG
2
I
RPROG
Km parameter setting with external resistors, see Table 4-2 for values
3
—
VBIAS
Internal regulator output (for decoupling only)
4
O
OUT1
Single phase coil output pin
5
O
OUT2
Single phase coil output pin
6
—
GND
Negative voltage supply (ground)
7
O
OUT3
Single phase coil output pin
8
—
VDD
Positive voltage supply for motor driver
9
I
DIR
Motor Rotation Direction
- Forward direction: connect pin to GND or leave floating
- Reverse direction: connect pin to VBIAS
10
I
PWM
11
—
EP
Function
Motor speed indication output
PWM input signal for speed control
Exposed pad (can be connected to the ground plan for better thermal dissipation)
Legend: I = Input; O = Output
DS22281A-page 8
 2011 Microchip Technology Inc.
MTD6505
4.0
FUNCTIONAL DESCRIPTION
The MTD6505 generates a full-wave signal to drive a
3-phase BLDC motor. High efficiency and low-power
consumption are achieved due to CMOS transistors
and synchronous rectification drive type.
4.1
Speed Control
The rotational speed of the motor can be controlled
either through the PWM digital input signal or by acting
directly on the power supply (VDD). When the PWM
signal is High (or left open), the motor rotates at full
speed. When the PWM signal is low, the IC outputs are
set to high-impedance and the motor is stopped.
By changing the PWM duty cycle, the speed can be
adjusted. Thus, the user has maximum freedom to
choose the PWM system frequency within a wide range
(from 1 kHz to 100 kHz).
Since the PWM pin has an internal pull-up resistor
connected to VDD, it is recommended to drive it
between 0V and High-Z. The PWM driver must be able
to support the pull-up resistor current, in order to drive
the pin. See “PWM Internal Pull-Up Resistor” in
Section 1.0, Electrical Characteristics.
The output transistor activation always occurs at a fixed
rate of 30 kHz, which is outside of the range of audible
frequencies.
Note 1: The PWM frequency has no direct affect
on the motor speed and is asynchronous
with the activation of the output
transistors.
Note 2: The standard output frequency is 30 kHz.
A 20 kHz output frequency option is
available upon request.
4.2
Motor Rotation Direction
The current-carrying order of the outputs depends on
the DIR pin state (“Rotation Direction”) and is described
in Table 4-1. The DIR pin is not designed for dynamic
direction change during operation.
TABLE 4-1:
MOTOR ROTATION
DIRECTION OPTIONS
(DIR PIN)
Rotation
Direction
Outputs Activation
Sequence
Connected
to GND
or Floating
Forward
OUT1  OUT2  OUT3
Connected
to VBIAS
Reverse
DIR Pin State
OUT3  OUT2  OUT1
 2011 Microchip Technology Inc.
4.3
Frequency Generator Function
The Frequency Generator output (FG) is a “Hall-effect
sensor equivalent” digital output, giving information to
an external controller about the speed and phase of the
motor. The FG pin is an open drain output, connecting
to a logical voltage level through an external pull-up
resistor. When a lock, or an out-of-sync situation is
detected by the driver, this output is set to highimpedance until the motor is restarted. Leave the pin
open when it is not used.
4.4
Lockup Protection and Automatic
Restart
If the motor is blocked and cannot rotate freely, a lockup protection circuit detects it and disables the driver by
setting its outputs to high-impedance to prevent the
motor coil from burnout. After a “waiting time” (TWAIT),
the lock-up protection is released and normal operation
resumes for a given time (TRUN). If the motor is still
blocked, a new period of waiting time is started. TWAIT
and TRUN timings are fixed internally, so that no external capacitor is required.
4.5
Overcurrent Protection
The motor peak current is limited by the driver to
750 mA (standard value), thus limiting the maximum
power dissipation in the coils.
4.6
Thermal Shutdown
The MTD6505 device has a thermal protection function
which detects when the die temperature exceeds
TJ = +170°C. When this temperature is reached, the
circuit enters the Thermal Shutdown mode, and the
outputs OUT1, OUT2 and OUT3 are disabled (highimpedance), avoiding the IC destruction and allowing
the circuit to cool down. When the junction temperature
(TJ) drops below +145°C, normal operation resumes.
The thermal detection circuit has +25°C hysteresis.
Thermal shutdown
Normal
operation
+145°
FIGURE 4-1:
Hysteresis.
+170°
TJ
Thermal Protection
DS22281A-page 9
MTD6505
4.7
Internal Voltage Regulator
VBIAS voltage is generated internally and is used to
supply internal logical blocks. The VBIAS pin is used to
connect an external decoupling capacitor (1 µF or
higher). Notice that this pin is for IC internal use, and is
not designed to supply DC current to external blocks.
4.8
BEMF Coefficient Setting
Km is the electro-mechanical coupling coefficient of the
motor (also referred to as “motor constant” or “BEMF
constant”). Depending on the conventions in use, the
exact definition of Km and its measurement criteria can
vary among motor manufacturers. To accommodate
various motor applications, the MTD6505 provides
options to facilitate diverse BEMF coefficients.
The MTD6505 defines BEMF coefficient (Km) as the
peak value of the phase-to-phase BEMF voltage,
normalized to the electrical speed of the motor. The
following table offers methods to set the Km value for
the MTD6505 device.
TABLE 4-2:
Km
Option
Km SETTINGS
Km (mV/Hz) Range
Phase-to-Phase
RPROG
Min
Max
Km0
3.25
6.5
GND
Km1
6.5
13
24 k
Km2
13
26
3.9 k
Km3
26
52
VBIAS
The RPROG sensing is actually a sequence that is controlled by the firmware. For any given RPROG, the internal control block will output the corresponding Km
range.
DS22281A-page 10
 2011 Microchip Technology Inc.
MTD6505
5.0
PACKAGING INFORMATION
5.1
Package Marking Information
10-Lead UDFN (3x3x0.5 mm)
Legend: XX...X
Y
YY
WW
NNN
e3
*
Note:
Example
Device
Code
MTD6505T-E/NA
AAAD
AAAD
1141
256
Customer-specific information
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
This package is Pb-free. The Pb-free JEDEC designator ( e3 )
can be found on the outer packaging for this package.
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
 2011 Microchip Technology Inc.
DS22281A-page 11
MTD6505
DS22281A-page 12
 2011 Microchip Technology Inc.
MTD6505
 2011 Microchip Technology Inc.
DS22281A-page 13
MTD6505
NOTES:
DS22281A-page 14
 2011 Microchip Technology Inc.
MTD6505
APPENDIX A:
REVISION HISTORY
Revision A (November 2011)
This is the original release of this document.
 2011 Microchip Technology Inc.
DS22281A-page 15
MTD6505
NOTES:
DS22281A-page 16
 2011 Microchip Technology Inc.
MTD6505
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
T
-X
Device Tape & Reel
Temperature
/XX
Examples:
Package
a)
Device:
MTD6505T: 3-Phase Brushless DC, Sinusoidal Sensorless
Fan Motor Driver (Tape and Reel)
Temperature Range:
E
=
Package:
NA
=
MTD6505T-E/NA
Tape and Reel,
Extended Temperature
10LD UDFN Package
Extended -40°C to +125°C
Plastic Dual Flat, thermally-enhanced,
3x3x0.5 mm Body (UDFN)
 2011 Microchip Technology Inc.
DS22281A-page 17
MTD6505
NOTES:
DS22281A-page 18
 2011 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.
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OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
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conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
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Printed on recycled paper.
ISBN: 978-1-61341-788-1
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analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
 2011 Microchip Technology Inc.
DS22281A-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://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 - Yokohama
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
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
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Hangzhou
Tel: 86-571-2819-3187
Fax: 86-571-2819-3189
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-330-9305
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
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 - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
DS22281A-page 20
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
08/02/11
 2011 Microchip Technology Inc.