MICROCHIP TC57

TC57
Line Regulator Controller
Features
General Description
• Low Dropout Voltage: 100mV @ 650mA with
FZT749 PNP Transistor
• 2.7V to 8V Supply Range
• Low Operating Current: 50µA Operating,
0.2µA Shutdown
• Low True Chip Enable
• Output Accuracy < ±2%
• Small Package: 5-Pin SOT-23A
The TC57 is a low dropout regulator controller that
operates with an external PNP pass transistor, allowing
the user to tailor the LDO characteristics to suit the
application at hand. This results in lower dropout
operation (and often lower cost) compared with
traditional linear regulators with on-board pass
transistors. The maximum output current of a TC57based regulator circuit is limited only by the
characteristics of the external pass transistor. For
example, a maximum output current of 650mA (with a
dropout voltage of 100mV) results when an FZT749
pass transistor is used, while a Darlington configuration
can deliver up to 4A.
Applications
•
•
•
•
•
Battery Operated Systems
Portable Instruments
High-Efficiency Linear Regulator
Post-Regulator for SMPS
Power Supply or Battery Back-Up Supply for
Memory
Flexibility, and superior performance make this family
of regulator controllers the ideal choice in applications
where low dropout voltage and low installed cost are
key.
Functional Block Diagram
Device Selection Table
FZT749
Q1
VIN +3.3V
Output
Part Number
Voltage
TC572502ECT
2.5V
Package
Temperature
Range
5-Pin SOT-23A -40°C to +85°C
TC573002ECT
3.0V
5-Pin SOT-23A -40°C to +85°C
TC573302ECT
3.3V
5-Pin SOT-23A -40°C to +85°C
RBE
47K
CIN
10µF
(Tantalum)
2
RB
1K
4
EXT
VOUT
3
CL
10µF
(Tantalum)
RL
VIN
TC573002ECT
OFF
Other output voltages and package options are available.
Please contact Microchip Technology Inc. for details.
VOUT +3V
ON
5
SHDN
GND
1
Package Type
3.3V Line Input, 3.0V, 500mA Output LDO
5-Pin SOT-23A
SHDN
EXT
5
4
TC57
1
2
3
GND
VIN
VOUT
NOTE: 5-Pin SOT-23A is equivalent to the EIAJ SC-74A.
 2002 Microchip Technology Inc.
DS21437B-page 1
TC57
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*
Input Voltage ........................................................+12V
Output Current .................................................... 50mA
Output Voltage............................. -0.3V to (VIN + 0.3V)
Power Dissipation.............................................150mW
Operating Temperature Range............. -40°C to +85°C
Storage Temperature Range .............. -40°C to +150°C
TC55 ELECTRICAL SPECIFICATIONS
TC57EP3002 Electrical Characteristics: SHDN = GND, VIN = VOUT + 1V, VOUT = 3V to 5V, IOUT = 0, TA = 25°C, Test Circuit of
Figure 3-1, unless otherwise noted. (Note 2)
Symbol
Parameter
Min
Typ
Max
Units
VIN
Input Voltage
—
—
8
V
VEXT
Voltage on EXT Output
—
—
8
V
0.98 X VR VR ±0.5% 1.02 X VR
V
Test Conditions
VOUT
Output Voltage
∆V OUT
Load Regulation
-60
—
60
mV
IOUT = 50mA (Note 1)
VIN - VOUT
Dropout Voltage
—
100
—
mV
IOUT = 100mA (Note 2)
IDD
Supply Current
—
50
80
µA
VSHDN = VIN = 5V
ISHDN
Shutdown Supply Current
VSHDN = GND
1mA ≤ IOUT ≤ 100mA (Note 3)
—
—
0.6
µA
∆V OUT/∆VIN Line Regulation
—
0.1
0.3
%/V
∆VOUT/∆T
VOUT Temperature Coefficient
—
±100
—
ppm/°C
ILEXT
EXT Pin Leakage Current
—
—
0.5
µA
IEXT
EXT Sink Current
—
—
25
mA
VIH
SHDN Input High Logic Threshold
1.5
—
—
V
VIL
SHDN Input Low Logic Threshold
—
—
0.25
V
IIH
SHDN Input Current @ VIH
—
—
0.1
µA
VSHDN = VIN = 5V
SHDN Input Current @ VIL
-0.2
-0.05
0
µA
VSHDN = GND
IIL
Note
1:
2:
3:
4:
IOUT = 50mA, 4V ≤ VIN ≤ 8V
(Note 3)
IOUT = 10mA, -40°C < TJ < +85°C
(Note 3)
Note 4
VR is the regulator output voltage setting.
Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at a
1V differential.
Varies with type of pass transistor used. Numbers shown are for the test circuit of Figure 3-1.
The product of IEXT X VEXT must be less than the maximum allowable power dissipation.
DS21437B-page 2
 2002 Microchip Technology Inc.
TC57
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
GND
2
VIN
3
VOUT
4
EXT
5
SHDN
 2002 Microchip Technology Inc.
Description
Ground terminal.
Supply voltage input. Positive input voltage of 2.7V to 8.0V.
Regulator voltage sense input. Connects to the collector of the external PNP pass transistor.
Base Drive for the external PNP pass transistor.
Shutdown Input. The device is enabled when SHDN ≤ VIL. The device enters a low power
shutdown state when SHDN ≥ VIH . During shutdown, the output is disabled, and supply current
falls to less than 1µA.
DS21437B-page 3
TC57
3.0
DETAILED DESCRIPTION
3.2
The TC57 series of precision low dropout regulator
controllers use an external PNP transistor to
accommodate a wide range of output currents. A series
resistor (RB) limits the maximum base current drawn
from the PNP transistor. Limiting the base drive both
determines the regulator’s output current capability, as
well as limits ground current when the device is
operated in dropout. The PNP transistor’s VCE(SAT) is
the only factor limiting dropout voltage.
Base-Current Limiting Resistor
Base current limiting resistor R B can be estimated
using:
EQUATION 3-3:
RB =
hFE (VIN – VBE)
IOUT
Where:
hFE is the current gain of the pass transistor
FIGURE 3-1:
TEST CIRCUIT
FZT749
Q1
VIN
RBE
33K
CIN
10µF
(Tantalum)
IOUT is the output current (in Amps)
VOUT
3
CL
10µF
(Tantalum)
RL
TC573002ECT
OFF
ON
5
VBE is the base-emitter voltage at the desired
output current (in volts)
VOUT
RB
680Ω
4
EXT
2 V
IN
VIN Is the input voltage (in volts)
SHDN
GND
1
For example, assume a desired continuous output
current of 1.0A, an input voltage of 5V, and an FZT749
pass transistor. The FZT749 has a typical hFE of 170,
and a VBE of 0.8V; both specified at a collector current
of 1.0A. Substituting these values into the equation
above results in an RB value of 704Ω (closest standard
value = 680Ω).
3.3
3.1
Transistor Selection
The PNP pass transistor must have satisfactory power
dissipation, current gain, and collector current specifications to suit the application at hand. The maximum
output current the circuit can deliver is influenced by
hFE. The highest guaranteed output current is given by:
EQUATION 3-1:
ILOAD(MAX) = 25 mA x hFE(MIN)
The transistor’s actual power dissipation (PD) is equal
to the maximum load current times the maximum input/
output voltage differential, or:
EQUATION 3-2:
PD ≈ ILOAD(MAX) x (VIN(MAX) – VOUT(MIN))
The ideal transistor has a minimum hFE of 100, and a
VCE(SAT) of less than 0.6V at full output current. For
example, the Zetex FZT749 has an hFE of 170 at a
collector current of 1A, and a guaranteed VCE(SAT) of
0.3V at a base current of 100mA. It is packaged in a
SOT-223 and is recommended for use with the TC57.
Other transistors are also suitable, depending on the
required input and output voltages and output current
(Table 3-1).
DS21437B-page 4
Pull-Up Resistor and Output
Capacitor
A pull-up resistor (RBE, installed between the base and
emitter of the pass transistor) facilitates rapid turn-off of
the pass transistor in the event of a sudden decrease in
load (Figure 3-2). Recommended values for this
resistor are between 20KΩ and 47KΩ. A Tantalum
output capacitor of at least 10µF must be used to
guarantee stability. Higher values decrease output
noise and eliminate power-on overshoot, but extend
power-up times. Table 3-1 lists several capacitor
choices.
FIGURE 3-2:
3.3V, 1A REGULATOR
USING 5V SUPPLY INPUT
FZT749
Q1
VIN = 5V
RBE
33KΩ
CIN
10µF
(Tantalum)
RB
680Ω
4
EXT
OFF ON
5
COUT
10µF
(Tantalum)
VOUT 3
2 V
IN
1
VOUT = 3.3V
TC57
GND
SHDN
 2002 Microchip Technology Inc.
TC57
3.4
Input Capacitor
3.5
The addition of an input capacitor further reduces
output noise, and negates the effects of power supply
input impedance. A 10µF (min) Tantalum capacitor is
recommended.
TABLE 3-1:
Shutdown Mode
The TC57 enters a low power shutdown mode when
the shutdown input (SHDN) is high. During shutdown,
the regulator is disabled, the output capacitor is
discharged through the load, and supply current to the
TC57 decreases to less than 1µA. Normal operation
resumes when SHDN is brought low. If the shutdown
mode is not used, SHDN should be tied to VIN.
COMPONENT SUPPLIERS
Device
Mounting
Method
Manufacturer
Website
CAPACITORS
267 Series
Matsuo
F95 Tantalum Series
Surface Mount
Surface Mount
Nichicon
http://www.matsuoelectronics.com
http://www.nichicon-us.com
595 Tantalum Series
Surface Mount
Sprague
http://www.vishay.com/brands/sprague
OS-CON Series
Through-Hole
Sanyo
LXF Series
Through-Hole
United Chemi-Con
http://chemi-con.com
Through-Hole
Zetex
http://www.zetex.com
http://www.sanyovideo.com
TRANSISTORS
ZTX749
2N4403
Through-Hole
ON SEMI
http://www.onsemi.com/home
2N2907A
Through-Hole
ON SEMI
http://www.onsemi.com/home
FZT749
Surface Mount
Zetex
 2002 Microchip Technology Inc.
http://www.zetex.com
DS21437B-page 5
TC57
4.0
TYPICAL CHARACTERISTICS
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.
1. OUTPUT VOLTAGE vs. OUTPUT CURRENT
TC575002 (5V)
TC574002 (4V)
TA = 25°C
VIN = 6V, CL = 10µF (Tantalum)
5.1
TA = 25°C
VIN = 4.3V, CL = 10µF (Tantalum)
5.0
4.9
4.8
4.7
3.4
OUTPUT VOLTAGE VOUT (V)
4.1
OUTPUT VOLTAGE VOUT (V)
OUTPUT VOLTAGE VOUT (V)
TC573302 (3.3V)
TA = 25°C
VIN = 5V, CL = 10µF (Tantalum)
4.0
3.9
3.8
3.7
0
100
200
300
400
500
3.3
3.2
3.1
3.0
0
OUTPUT CURRENT IOUT (mA)
100
200
400
300
0
500
100
OUTPUT CURRENT IOUT (mA)
200
300
400
500
OUTPUT CURRENT IOUT (mA)
2. OUTPUT VOLTAGE vs. INPUT VOLTAGE
TC575002 (5V)
TC575002 (5V)
CL = 10µF (Tantalum), TA = 25°C
4.2
IOUT = 1mA
500mA
4.8
4.6
100mA
4.4
4.2
4.5
IOUT = 1mA
5.05
500mA
5.00
100mA
4.95
4.90
5
5.5
INPUT VOLTAGE VIN (V)
TC574002 (4V)
IOUT = 1mA
100mA, 500mA
3.90
3.85
5
6
INPUT VOLTAGE VIN (V)
DS21437B-page 6
100mA
3.4
8
7
4.0
4.5
INPUT VOLTAGE VIN (V)
TC573302 (3.3V)
CL = 10µF (Tantalum), TA = 25°C
3.5
OUTPUT VOLTAGE VOUT (V)
4.05
4
3.6
TC573302 (3.3V)
4.10
3.95
7
500mA
3.8
INPUT VOLTAGE VIN (V)
CL = 10µF (Tantalum), TA = 25°C
4.00
6
IOUT = 1mA
A
4.0
3.2
3.5
4.85
5.0
CL = 10µF (Tantalum), TA = 25°C
3.40
OUTPUT VOLTAGE VOUT (V)
5.0
OUTPUT VOLTAGE VOUT (V)
OUTPUT VOLTAGE VOUT (V)
OUTPUT VOLTAGE VOUT (V)
CL = 10µF (Tantalum), TA = 25°C
5.10
5.2
OUTPUT VOLTAGE VOUT (V)
TC574002 (4V)
CL = 10µF (Tantalum), TA = 25°C
3.3
IOUT = 1mA
500mA
3.1
2.9
100mA
2.7
2.5
2.8
3.35
IOUT = 1mA, 100mA
3.30
500mA
3.25
3.20
3.15
3.3
INPUT VOLTAGE VIN (V)
3.8
3
4
5
INPUT VOLTAGE VIN (V)
6
 2002 Microchip Technology Inc.
TC57
4.0
TYPICAL CHARACTERISTICS (CONTINUED)
3. DROPOUT VOLTAGE vs. OUTPUT CURRENT
TC575002 (5V)
TC574002 (4V)
1.0
CL = 10µF (Tantalum)
1.0
0.8
0.6
0.4
80°C
TOPR = 25°C
0.2
-3
30°C
0.0
0
200
400
600
800
DROPOUT VOLTAGE VIN -VOUT
1.0
DROPOUT VOLTAGE VIN -VOUT
DROPOUT VOLTAGE VIN -VOUT
TC573302 (3.3V)
CL = 10µF (Tantalum)
CL = 10µF (Tantalum)
0.8
0.6
0.4
80°C
TOPR
R = 25°C
0.2
-30
0°C
0.0
1000
0
200
OUTPUT CURRENT IOUT (mA)
400
800
600
0.8
0.6
80°C
0.4
TOPR = 25°
25°C
0.2
-30°C
0.0
0
1000
200
OUTPUT CURRENT IOUT (mA)
400
800
600
1000
OUTPUT CURRENT IOUT (mA)
4. SUPPLY CURRENT vs. INPUT VOLTAGE
TC575002 (5V)
TC574002 (4V)
TC573302 (3.3V)
50
40
TOPR = 25°C, 80°C
30
-30°C
20
10
0
50
SUPPLY CURRENT IDD (µA)
SUPPLY CURRENT IDD (µA)
SUPPLY CURRENT IDD (µA)
50
40
30
TOPR = 25°C, 80°C
20
-30°C
10
0
5
6
7
8
40
30
TOPR = 25°C, 80°C
20
-30°C
10
0
4
5
INPUT VOLTAGE VIN (V)
6
7
3
4
6
5
INPUT VOLTAGE VIN (V)
INPUT VOLTAGE VIN (V)
TC574002 (4V)
TC573302 (3.3V)
5. OUTPUT VOLTAGE vs. AMBIENT TEMPERATURE
TC575002 (5V)
VIN = 6.0V
IOUT = 100mA, CL = 10µF (Tantalum)
VIN = 5.0V
IOUT = 100mA, CL = 10µF (Tantalum)
OUTPUT VOLTAGE VOUT (V)
OUTPUT VOLTAGE VOUT (V)
5.05
5.00
4.95
-20
0
20
40
60
AMBIENT TEMP. TA (°C)
 2002 Microchip Technology Inc.
80
3.40
OUTPUT VOLTAGE VOUT (V)
4.10
5.10
4.90
-40
VIN = 4.3V
IOUT = 100mA, CL = 10µF (Tantalum)
4.05
4.00
3.95
3.90
-40
3.35
3.30
3.25
3.20
-20
20
40
60
0
AMBIENT TEMP. TA (°C)
80
-40
-20
0
20
40
60
80
AMBIENT TEMP. TA (°C)
DS21437B-page 7
TC57
4.0
TYPICAL CHARACTERISTICS (CONTINUED)
6. SUPPLY CURRENT vs. AMBIENT TEMPERATURE
TC575002 (5V)
TC574002 (4V)
50
30
20
10
0
-40
SUPPLY CURRENT IDD (µA)
40
40
30
20
10
0
20
40
60
80
40
30
20
10
0
0
-20
VIN = 4.3V
50
50
SUPPLY CURRENT IDD (µA)
SUPPLY CURRENT IDD (µA)
TC573302 (3.3V)
VIN = 5V
VIN = 6V
-40
AMBIENT TEMP. TA (°C)
-20
0
20
40
60
AMBIENT TEMP. TA (°C)
80
-40
0
20
40
60
-20
AMBIENT TEMP. TA (°C)
80
7. INPUT TRANSIENT RESPONSE
TC575002 (5V)
TC575002 (5V)
IOUT = 100mA, CL = 10µF (Tantalum)
8
Input Voltage
5.3
6
5.2
5
Output Voltage
5.1
4
5.0
3
4.9
7
5
3
4.9
TC574002 (4V)
4.3
5
4.2
4.1
3
4.0
2
3.9
INPUT VOLTAGE VIN (V)
Input Voltage
7
OUTPUT VOLTAGE VOUT (V)
INPUT VOLTAGE VIN (V)
5.1
IOUT = 100mA, CL = 10µF (Tantalum)
6
DS21437B-page 8
Output Voltage
Time (0.4 msec/div)
4.4
Time (0.4 msec/div)
5.2
5.0
TC574002 (4V)
Output Voltage
5.3
4
IOUT = 10mA, CL = 10µF (Tantalum)
4
Input Voltage
6
Time (0.4 msec/div)
7
5.4
4.4
Input Voltage
6
4.3
5
4.2
4
Output Voltage
4.1
3
4.0
2
3.9
OUTPUT VOLTAGE VOUT (V)
7
INPUT VOLTAGE VIN (V)
5.4
OUTPUT VOLTAGE VOUT (V)
INPUT VOLTAGE VIN (V)
8
OUTPUT VOLTAGE VOUT (V)
IOUT = 10mA, CL = 10µF (Tantalum)
Time (0.4 msec/div)
 2002 Microchip Technology Inc.
TC57
4.0
TYPICAL CHARACTERISTICS (CONTINUED)
7. INPUT TRANSIENT RESPONSE (CONT.)
TC573302 (3.3V)
TC573302 (3.3V)
6
IOUT = 100mA, CL = 10µF (Tantalum)
6
3.7
3.6
4
3.5
3
Output Voltage
3.4
2
3.3
1
3.2
INPUT VOLTAGE VIN (V)
5
3.7
Input Voltage
OUTPUT VOLTAGE VOUT (V)
INPUT VOLTAGE VIN (V)
Input Voltage
5
3.6
4
3.5
3
3.4
Output Voltage
2
3.3
1
3.2
Time (0.4 msec/div)
OUTPUT VOLTAGE VOUT (V)
IOUT = 10mA, CL = 10µF (Tantalum)
Time (0.4 msec/div)
8. LOAD TRANSIENT RESPONSE
TC575002 (5V)
TC574002 (4V)
5.05
Output Voltage
5.00
800
600
4.95
Output Current
400
300mA
4.90
4.85
200
1mA
0
OUTPUT VOLTAGE VOUT (V)
1000
OUTPUT CURRENT IOUT (mA)
OUTPUT VOLTAGE VOUT (V)
5.10
VIN = 5V, CL = 10µF (Tantalum)
4.10
1000
4.05
800
4.00
Output Voltage
600
400
3.95
Output Current
300mA
200
3.90
3.85
1mA
OUTPUT CURRENT IOUT (mA)
VIN = 6V, CL = 10µF (Tantalum)
0
Time (10 msec/div)
Time (10 msec/div)
TC573302 (3.3V)
VIN = 4.3V, CL = 10µF (Tantalum)
OUTPUT VOLTAGE VOUT (V)
Output Voltage
3.35
800
3.30
600
3.25
Output Current
400
300mA
200
3.20
3.15
1mA
OUTPUT CURRENT IOUT (mA)
1000
3.40
0
Time (10 msec/div)
 2002 Microchip Technology Inc.
DS21437B-page 9
TC57
5.0
PACKAGING INFORMATION
5.1
Package Marking Information
2
3
1
5.2
3
represents integer part of output voltage
Symbol
Voltage
2
3
4
5
6
2.
3.
4.
5.
6.
represents first decimal of output voltage
Symbol
Voltage
Symbol
Voltage
0
1
2
3
4
.0
.1
.2
.3
.4
5
6
7
8
9
.5
.6
.7
.8
.9
represents production lot ID code
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
5-Pin SOT-23A
DS21437B-page 10
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
8 mm
4 mm
3000
7 in
 2002 Microchip Technology Inc.
TC57
5.3
Package Dimensions
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)
 2002 Microchip Technology Inc.
DS21437B-page 11
TC57
NOTES:
DS21437B-page 12
 2002 Microchip Technology Inc.
TC57
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART CODE TC57
XX
02
ECT
XX
Output Voltage:
Ex: 30 = 3.0V
Tolerance:
2 = ±2%
Temperature/Package:
E: -40°C to +85°C
CT: 5-Pin SOT-23A
Taping Direction:
TR: Standard Taping
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.
3.
Your local Microchip sales office
The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277
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 2002 Microchip Technology Inc.
DS21437B-page13
TC57
NOTES:
DS21437B-page14
 2002 Microchip Technology Inc.
TC57
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with
express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, FilterLab,
KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER,
PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.
dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
MXDEV, MXLAB, PICC, PICDEM, PICDEM.net, rfPIC, Select
Mode and Total Endurance are trademarks of Microchip
Technology Incorporated in the U.S.A.
Serialized Quick Turn Programming (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.
© 2002, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999
and Mountain View, California in March 2002.
The Company’s quality system processes and
procedures are QS-9000 compliant for its
PICmicro ® 8-bit MCUs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals,
non-volatile memory and analog products. In
addition, Microchip’s quality system for the
design and manufacture of development
systems is ISO 9001 certified.
 2002 Microchip Technology Inc.
DS21437B-page 15
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05/01/02
*DS21437B*
DS21437B-page 16
 2002 Microchip Technology Inc.