TC126331ECTRT [MICROCHIP]
0.4 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO5, EIAJ, SC-74A, SOT-23A, 5 PIN;
| 型号： | TC126331ECTRT |
| 厂家： | 
MICROCHIP |
| 描述： | 0.4 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO5, EIAJ, SC-74A, SOT-23A, 5 PIN 开关 光电二极管 |
| 文件： | 总10页 (文件大小：84K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TC125
TC126
PFM Step-Up DC/DC Regulators
GENERAL DESCRIPTION
FEATURES
■ Space-Saving 5-Pin SOT-23A Package
■ Guaranteed 0.9V Start-Up
■ PFM (100 KHz Max Operating Frequency)
■ 40 µA Maximum Supply Current (VOUT = 3V @ 30 mA)
■ 0.5 µA Shutdown Mode (TC125)
■ Voltage Sense Input (TC126)
■ Requires Only Three External Components
■ 80 mA Maximum Output Current
The TC125/6 step-up (Boost) switching regulators fur-
nish output currents to a maximum of 80 mA (VIN = 2V,
VOUT = 3V) with typical efficiencies above 80%. These
devices employ pulse frequency modulation (PFM) for mini-
mum supply current at low loads. They are ideal for battery-
operated applications powered from one or more cells.
Maximum supply current is less than 70 µA at full output
load, and less than 5 µA in standby (VOUT = 3V). Both
devicesrequireonlyanexternalinductor,diode,andcapaci-
tor to implement a complete DC/DC regulator.
The TC126 has separate output voltage sensing and
chip power inputs for greater application flexibility. The
TC125combinestheoutputvoltagesensingandchippower
inputs onto a single package pin, but adds a power-saving
shutdown mode that suspends regulator operation and
reduces supply current to less than 0.5 µA when the
shutdown control input (SHDN) is low.
TYPICAL APPLICATIONS
■ Palmtops/PDAs
■ Battery-Powered Systems
■ Cameras
■ Portable Communicators
ORDERING INFORMATION
Housed in tiny 5-Pin SOT-23A packages, the
TC125/6 occupy minimum board space, and use tiny
external components. The TC125 accepts input voltages
from 2.0V to 10.0V. The TC126 accepts input voltages from
2.2V to 10V. Both the TC125 and TC126 have a guaranteed
start-up voltage of 0.9V at light load.
Part #
Output
Package
Temp.
Range
Voltage
TC125301ECT
TC125331ECT
TC125501ECT
TC126301ECT
TC126331ECT
TC126501ECT
3.0V
3.3V
5.0V
3.0V
3.3V
5.0V
5-Pin SOT-23A –40°C to 85°C
5-Pin SOT-23A –40°C to 85°C
5-Pin SOT-23A –40°C to 85°C
5-Pin SOT-23A –40°C to 85°C
5-Pin SOT-23A –40°C to 85°C
5-Pin SOT-23A –40°C to 85°C
PIN CONFIGURATIONS
GND
4
LX
GND
LX
5
4
5
NOTE: Other output voltages are available. Output voltage Range:
2.0V to 7.0V in 0.1V increments. Please contact Microchip
Technology Inc. for details.
TC126
2
TC125
3
1
1
3
2
NC
NC
PS
SHDN
SENSE
V
DD
TYPICAL APPLICATION
SUMIDA
100µH CD54
MA735
V
IN
5.0V @ 80mA
47 µF/16V
TANTALUM
5
4
LX
GND
2 x "AA"
CELL
3V
TC125
SHDN
1
PS
2
NC
3
Two Cell to 5V Boost Regulator
© 2001 Microchip Technology Inc DS21372A
TC125/6-1 8/3/99
PFM Step-Up DC/DC Regulators
TC125
TC126
ABSOLUTE MAXIMUM RATINGS*
above those listed under Absolute Maximum Ratings may cause perma-
nent 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 operational sections of the specifications is not implied.
Exposure to Absolute Maximum Rating Conditions for extended periods
may affect device reliability.
Voltage on VDD, SENSE/VDD, LX, SHDN pins. –0.3 to +12V
LX Sink Current....................................................400 mA
Power Dissipation ...............................................150 mW
Operating Temperature............................ –40°C to +85°C
Storage Temperature (TSTG) .................. –40°C to +125°C
*Static-sensitive device. Unused devices must be stored in conductive
material. Protect devices from static discharge and static fields. Stresses
ELECTRICAL CHARACTERISTICS:
VIN = VOUT x 0.6, TA = 25°C, SHDN = VOUT (TC125), unless otherwise noted.
Symbol
VOUT
Parameter
Output Voltage
Test Conditions
Min
VR - 2.5%
0.70
Typ
Max
Unit
V
V
R ± 0.5% VR + 2.5%
VDD
Operating Voltage Range
Note 4
—
10.0
0.90
V
VSTART
IDD
Start-Up Voltage
IOUT = 1 mA
—
0.80
V
Operating Supply Current
Note 2
TC125
VOUT = 2V,
IOUT = 10 mA
—
—
—
14
20
32
28
40
64
µA
VOUT = 3V,
TC125/126
IOUT = 30 mA
VOUT = 5V,
IOUT = 50 mA
TC125/126
IOUT = 0
INL
No Load Supply Current
Standby Supply Current
VOUT = 2V
VOUT = 3V
VOUT = 5V
—
—
5
5
6
9
10
11
µA
µA
ISTBY
VIN= VOUT + 0.5V
VIN = 2V
VIN = 3V
VIN = 5V
—
—
—
2
3
3
4
5
5
ISHDN
Shutdown Supply Current
LX Pin ON Resistance
Note 2, SHDN = VIL
–
—
0.5
µA
RLX(ON)
Note 2, Note 3,
VLX = 0.4V
VOUT = 2V
VOUT = 3V
VOUT = 5V
—
—
—
10
6
3
14
8
5
Ω
ILX
LX Pin Leakage Current
Duty Cycle
No External Components,
VOUT = VLX = 10V
—
—
1
µA
DCYCLE
fMAX
Note 2, Measured at LX Pin
70
85
75
100
—
80
115
1.1
%
KHz
V
Maximum Oscillator Frequency Note 2
VLXLIM
η
LX Pin Limit Voltage
Efficiency
Note 2
0.7
VOUT = 2V
VOUT = 3V
VOUT = 5V
—
—
—
70
80
85
—
—
—
%
VIH
VIL
SHDN Input Logic HIGH
SHDN Input Logic LOW
0.75
—
—
—
—
—
—
0.20
0.25
—
V
V
IIN
SHDN Input Current (High)
SHDN Pin Input Current (Low)
—
µA
µA
H
IIN
–0.25
L
NOTES: 1. VR is the factory output voltage setting.
2. VIN = VOUT x 0.95.
3. VDD input tied to SENSE input for TC126, as shown in Figure 2.
4. The VDD input of the TC126 must be operated between 2.2V and 10.0V for spec compliance.
The VPS input of the TC125 must be operated between 2.0V and 10.0V for spec compliance.
© 2001 Microchip Technology Inc DS21372A
2
TC125/6-1 8/3/99
PFM Step-Up DC/DC Regulators
TC125
TC126
PIN DESCRIPTION
TC125 Pin #
TC126 Pin #
Name
Description
1
—
SHDN
Shutdown Input. A logic low on this input suspends device operation
and reduces supply current to less than 0.5 µA. Device operation
resumes when SHDN is brought high.
—
2
1
SENSE
PS
Voltage Sense Input. This input provides feedback voltage
sensing to the internal error amplifier. It must be connected to the
output voltage node, preferably the single point in the system where
tight voltage regulation is most beneficial.
—
Power and Voltage Sense Input. This dual function input provides
both feedback voltage sensing and internal chip power. It should be
connected to the regulator output. (See Figure 1).
—
3
2
3
4
5
VDD
NC
Power Supply Input.
Not Connected.
4
GND
LX
Ground Terminal.
5
Inductor Switch Output. LX is the drain of an internal N-channel
switching transistor. This terminal drives the external inductor, which
ultimately provides current to the load.
TC125/6 OVERVIEW
must be connected to the regulated output as shown in
Figure 1. PS also senses output voltage for closed-loop
regulation. Start-upcurrentisfurnishedthroughtheinductor
when input voltage is initially applied. This action starts the
oscillator, causing the voltage at the PS input to rise,
bootstrapping the regulator into full operation.
The TC126 (Figure 2) is recommended for all applica-
tions not requiring shutdown mode. It has separate VDD and
SENSE inputs, allowing it to be powered from any source of
2.2V to 10V in the system. The VDD input of the TC126 may
be connected to the VIN, VOUT, or an external DC voltage.
Lower values of VDD result in lower supply current, but lower
efficiency due to higher switch ON resistance. Higher VDD
values increase supply current, but drive the internal switch-
ing transistor harder (lowering RDSON), thereby increasing
efficiency.
The TC125/6 are PFM step-up DC/DC regulators for
use in systems operating from two or more cells or in low
voltage, line powered applications. Because Pulse Fre-
quency Modulation (PFM) is used, the TC125/6 switching
frequency (and therefore supply current) is minimized at low
outputloads. Thisisespeciallyimportantinbatteryoperated
applications (such as pagers) that operate in standby mode
most of the time. For example, a TC125/6 with a 3V output
and no load will consume a maximum supply current of only
10 µA versus a supply current of 40 µA maximum when
IOUT =30mA.Bothdevicesrequireonlyanexternalinductor,
diode, and capacitor to implement a complete DC/DC
converter.
The TC125 is recommended for applications requiring
shutdown mode as a means of reducing system supply
current. The TC125 is powered from the PS input, which
L1
D1
3.3V
LINE
SUPPLY
100µH SUMIDA CD54
MA735
D1
MA735
L1
1.5V
100µH SUMIDA CD54
5
4
4
5
GND
LX
LX
GND
TC125
TC126
SHDN
1
PS NC
2
V
OUT
SENSE
1
V
NC
3
DD
ON OFF
3
3.3V @ 40mA
2
SHUTDOWN
CONTROL
V
OUT
5V @ 80mA
C
1
C
1
47 µF/16V
47 µF/16V
TANTALUM
TANTALUM
Figure 2. Typical TC126 Circuit
Figure 1.Typical TC125 Circuit
TC125/6-1 8/3/99
© 2001 Microchip Technology Inc DS21372A
3
PFM Step-Up DC/DC Regulators
TC125
TC126
Input Bypass Capacitors
APPLICATIONS
Adding 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.
Low Power Shutdown Mode
The TC125 enters a low power shutdown mode when
SHDN is brought low. While in shutdown, the oscillator is
disabled and the internal switch is shut off. Normal regulator
operation resumes when SHDN is brought high. Because
the TC125 uses an external diode, a leakage path between
the input voltage and the output node (through the inductor
and diode) exists while the regulator is in shutdown. Care
must be taken in system design to assure the input supply
is isolated from the load during shutdown.
Inductor Selection
Selecting the proper inductor value is a trade-off be-
tween 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 to a higher value.
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. The recommended inductor value
for use with the TC125/6 is 100 µH. Inductors with a ferrite
core (or equivalent) are recommended. For highest effi-
ciency, use an inductor with a series resistance less than 20
mΩ.
Behavior When VIN is Greater Than the Fac-
tory-Programmed OUT Setting
TheTC125andTC126aredesignedtooperateasstep-
up regulators only. As such, VIN is assumed to always be
less than the factory-programmed output voltage setting
(VR).OperatingtheTC125/6withVIN >VR causesregulating
action to be suspended (and corresponding supply current
reduction) until VIN is again less than VR. While regulating
action is suspended, VIN is connected to the output voltage
node through the series combination of the inductor and
Schottky diode. Again, care must be taken to add the
appropriate isolation (MOSFET series switch or post LDO
with shutdown) during system design if this VIN/VOUT leak-
age path is problematic.
Internal Transistor Switch Current Limiting
The peak switch current is equal to the input voltage
divided by the RDSON of the internal switch. The internal
transistor has absolute maximum current rating of 400 mA
with a design limit of 350 mA. A built-in oscillator frequency
doubling circuit guards against high switching currents.
Should the voltage on the LX pin rise above 1.1V, max while
Table 1. Suggested Components and Manufacturers
Type
Inductors
Capacitors
Diodes
Surface Mount
Sumida
Matsuo
Nihon
CD54 Series
CDR125 Series
267 Series
EC10 Series
Murata
GRM200 Series
Coiltronics
CTX Series
Sprague
595D Series
Matshushita
MA735 Series
Murata
Nichicon
LQN6C Series
F93 Series
Through Hole
Sumida
Sanyo
Motorola
RCH855 Series
RCH110 Series
OS-CON Series
1N5817-1N5822
Renco
Nichicon
RL1284-12
PL Series
© 2001 Microchip Technology Inc DS21372A
4
TC125/6-1 8/3/99
PFM Step-Up DC/DC Regulators
TC125
TC126
the internal N-channel switch is ON, the oscillator frequency
automatically doubles to minimize ON time. Although re-
duced, switch current still flows because the regulator re-
mains in operation. Therefore, the LX input is not internally
current limited and care must be taken never to exceed the
350 mA maximum limit. Failure to observe this will result in
damage to the regulator.
TC125/6
(Mount on Reverse Side of Board)
VOUT
VIN
D1
L1
COUT
CIN
J2
J1
ON SD OFF
EXT VDD VOUT
VOUT
V
DD
EXT
EXT
SENSE
VDD
Select
Output Diode
J2
J1
EXT
VDD
V
OUT SENSE EXT
J3
For best results, use a Schottky diode such as the
MA735, 1N5817, MBR0520L, or equivalent. Connect the
diode between the PS and LX pins (TC125) or SENSE and
LX pins (TC126) as close to the IC as possible. (Do not use
ordinary rectifier diodes since the higher threshold voltages
reduce efficiency.)
ON SD OFF
Shutdown
Control
J3
VOUT
EXT
SENSE
SENSE
Select
Figure 3. TC125/6 Demo Board Parts
locations specified. Jumper locations J1, J2, J3 can be
soldered in place as in Table 2, or shorting strips can be
installed to facilitate easy reconfiguration. If shorting strips
are used, specify 0.1”, single row strip, such as DigiKey
S1012 - 36 - ND.
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 1 lists suggested
component numbers and manufacturers.
Table 2.
Device
J1
J2
J3
TC125
Short SD to ON
Short VDD to VOUT
Leave
OPEN
TC126
Leave OPEN
Short VDD to VOUT
Short
SENSE
to VOUT
Board Layout Guidelines
As with all inductive switching regulators, the TC125/6
generate fast switching waveforms that radiate noise. Inter-
connecting 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 con-
nected to a single point. The input capacitor should be
placed as close to power and ground pins of the TC125/6 as
possible.
Note that there are two sets of inductor mounting holes
to accomodate various sizes of through-hole inductors.
Once the components are installed, configure the shorting
blocks for normal operation as follows:
The TC125 is placed in shutdown by removing the
shorting block (J1) BETWEEN SD and ON and installing it
between SD and OFF (J1). The TC126 uses external VDD
input when the shorting block between VDD and VOUT is
removed from J2 and installed between VDD and EXT. The
EXT VDD pad on the board is then wired to desired 2.2V to
10Vsource. Likewise, externalfeedbacksensingisselected
by removing the shorting block between SENSE and VOUT
and installing it between VOUT and EXT. The EXT SENSE
pad on the board is then wired to the desired location.
Important: Never install shorting blocks on J1 SD to
OFF and F3 SENSE to VOUT at the same time. This
combinationofshortingblocksshortstheinputsupply!
TC125/6 DEMO Card
The TC125/6 DEMO Card can be used to evaluate this
series of products. It is a pre-etched and drilled PC card with
jumper options to accomodate either device (Figure 3).
ThesecardsareavailablefromyourlocalTelComSemicon-
ductor sales office.
Using the TC125/6 DEMO Board
Mount the TC125/6 on the foil side of the circuit board
(Figure 3). The diode, input and output capacitors, and
inductor are mounted on the blank side of the board in the
TC125/6-1 8/3/99
© 2001 Microchip Technology Inc DS21372A
5
PFM Step-Up DC/DC Regulators
TC125
TC126
D1
V
IN
V
OUT
L1
COUT
CIN
5
4
J2
SELECT
V
GND
LX
DD
EXT
VDD
VOUT VDD
EXT
TC125/6
NC
2
1
3
EXT
SENSE
SD
J1
ON
VOUT SENSE
EXT
OFF
J3
SENSE SELECT
SHUTDOWN CONTROL
Figure 4. TC125/6 Demo Board Schematic
TC125/6 Demo Board Parts
TC125/6
(Mount on Reverse Side of Board)
VOUT
VIN
D1
L1
COUT
CIN
J2
J1
EXT VDD VOUT
ON SD OFF
VOUT
V
EXT
DD
EXT
SENSE
VDD
Select
J2
J1
EXT
VDD
V
OUT SENSE EXT
J3
ON SD OFF
Shutdown
Control
J3
VOUT
EXT
SENSE
SENSE
Select
Figure 3. TC125/6 Demo Board Parts
6
© 2001 Microchip Technology Inc DS21372A
TC125/6-1 8/3/99
PFM Step-Up DC/DC Regulators
TC125
TC126
TYPICAL CHARACTERISTICS
1. OUTPUT VOLTAGE vs. OUTPUT CURRENT
TC125/126
TC125/126
L = 100 µH, C = 47 µF (Tantalum)
L = 100 µH, C = 47 µF (Tantalum)
3.5
3.0
1.8V
6
3.0V
2.5
2.0
5
4
1.5V
1.2V
2.0V
V
IN
= 0.9V
1.5
1.0
3
2
1.5V
1.2V
V
IN
= 0.9V
0.5
0
1
0
0
60
80
20
40
100
0
60
80
20
40
100
OUTPUT CURRENT : IOUT (mA)
OUTPUT CURRENT : IOUT (mA)
2. EFFICIENCY vs. OUTPUT CURRENT
TC125/126
TC125/126
L = 100 µH, C = 47 µF (Tantalum)
L = 100 µH, C = 47 µF (Tantalum)
100
100
V
IN
= 3.0V
80
60
80
60
V
IN
= 1.8V
2.0V
0.9V
1.2V
1.5V
1.5V
0.9V
1.2V
40
40
20
0
20
0
0
60
80
20
40
100
0
60
80
20
40
100
OUTPUT CURRENT : IOUT (mA)
OUTPUT CURRENT : IOUT (mA)
TC125/6-1 8/3/99
© 2001 Microchip Technology Inc DS21372A
7
PFM Step-Up DC/DC Regulators
TC125
TC126
MARKINGS
ꢂ represents 1st decimal of output voltage and frequency
5-Pin SOT-23A
Symbol
100KHz
Output Voltage
0
1
2
3
4
5
6
7
8
9
.0
.1
.2
.3
.4
.5
.6
.7
.8
.9
ꢀ represents product classification; TC125 = L
TC126 = N
ꢁ represents integer part of output voltage and frequency
Symbol
100KHz
Output Voltage
ꢃ represents production lot ID number
1
2
3
4
5
6
7
1
2
3
4
5
6
7
TAPING FORM
Component Taping Orientation for 5-Pin SOT-23A (EIAJ SC-74A) Devices
PIN 1
User Direction of Feed
User Direction of Feed
M a r k i n g
D e v i c e
Device
Marking
W
PIN 1
P
Standard Reel Component Orientation
TR Suffix Device
(Mark Right Side Up)
Reverse Reel Component Orientation
RT Suffix Device
(Mark Upside Down)
Carrier Tape, Number of Components Per Reel and Reel Size
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
3000
Reel Size
5-Pin SOT-23A
8 mm
4 mm
7 in
Tape and Reel Specifications Table
Package
Carrier Width (W)
Pitch (P)
4 mm
Part Per Full Reel
Reel Size
5-Pin SOT-23A
8 mm
3000
7
© 2001 Microchip Technology Inc DS21372A
8
TC125/6-1 8/3/99
PFM Step-Up DC/DC Regulators
TC125
TC126
PACKAGE DIMENSIONS
5-Pin SOT-23A (EIAJ SC-74A)
.075 (1.90)
REF.
.071 (1.80)
.059 (1.50)
.122 (3.10)
.098 (2.50)
.020 (0.50)
.012 (0.30)
.037 (0.95)
REF.
PIN 1
.122 (3.10)
.106 (2.70)
.057 (1.45)
.035 (0.90)
.010 (0.25)
.004 (0.09)
10° MAX.
.006 (0.15)
.000 (0.00)
.024 (0.60)
.004 (0.10)
Dimensions: inches (mm)
TC125/6-1 8/3/99
© 2001 Microchip Technology Inc DS21372A
9
WORLDWIDE
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ERVICE
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ASIA/PACIFIC (continued)
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Hong Kong
Microchip Asia Pacific
RM 2101, Tower 2, Metroplaza
223 Hing Fong Road
Kwai Fong, N.T., Hong Kong
Tel: 852-2401-1200 Fax: 852-2401-3431
Tel: 978-371-6400 Fax: 978-371-0050
Chicago
333 Pierce Road, Suite 180
Itasca, IL 60143
Tel: 630-285-0071 Fax: 630-285-0075
Dallas
4570 Westgrove Drive, Suite 160
Addison, TX 75001
Tel: 972-818-7423 Fax: 972-818-2924
Batiment A - ler Etage
91300 Massy, France
Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79
Germany
Arizona Microchip Technology GmbH
Gustav-Heinemann Ring 125
D-81739 Munich, Germany
India
Microchip Technology Inc.
India Liaison Office
Divyasree Chambers
Tel: 49-89-627-144 0 Fax: 49-89-627-144-44
1 Floor, Wing A (A3/A4)
No. 11, OíShaugnessey Road
Bangalore, 560 025, India
Tel: 91-80-2290061 Fax: 91-80-2290062
Dayton
Germany
Analog Product Sales
Lochhamer Strasse 13
D-82152 Martinsried, Germany
Tel: 49-89-895650-0 Fax: 49-89-895650-22
Two Prestige Place, Suite 130
Miamisburg, OH 45342
Tel: 937-291-1654 Fax: 937-291-9175
Japan
Detroit
Tri-Atria Office Building
32255 Northwestern Highway, Suite 190
Farmington Hills, MI 48334
Tel: 248-538-2250 Fax: 248-538-2260
Microchip Technology Intl. Inc.
Benex S-1 6F
Italy
Arizona Microchip Technology SRL
Centro Direzionale Colleoni
Palazzo Taurus 1 V. Le Colleoni 1
20041 Agrate Brianza
3-18-20, Shinyokohama
Kohoku-Ku, Yokohama-shi
Kanagawa, 222-0033, Japan
Tel: 81-45-471- 6166 Fax: 81-45-471-6122
Los Angeles
18201 Von Karman, Suite 1090
Irvine, CA 92612
Milan, Italy
Tel: 39-039-65791-1 Fax: 39-039-6899883
Korea
Microchip Technology Korea
168-1, Youngbo Bldg. 3 Floor
Samsung-Dong, Kangnam-Ku
Seoul, Korea
Tel: 949-263-1888 Fax: 949-263-1338
United Kingdom
Arizona Microchip Technology Ltd.
505 Eskdale Road
Winnersh Triangle
Wokingham
Mountain View
Analog Product Sales
1300 Terra Bella Avenue
Mountain View, CA 94043-1836
Tel: 650-968-9241 Fax: 650-967-1590
Tel: 82-2-554-7200 Fax: 82-2-558-5934
Berkshire, England RG41 5TU
Tel: 44 118 921 5869 Fax: 44-118 921-5820
01/09/01
All rights reserved.
©
2001 Microchip Technology Incorporated. Printed in the USA. 1/01
Printed on recycled paper.
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 Microchipís 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, except as maybe explicitly expressed herein, under any intellec-
tual property rights. The Microchip logo and name are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. All rights
reserved. All other trademarks mentioned herein are the property of their respective companies.
© 2001 Microchip Technology Inc DS21372A
10
TC125/6-1 8/3/99
相关型号：
TC126331TR
Switching Regulator, Voltage-mode, 0.4A, 115kHz Switching Freq-Max, PDSO5, SOT-23, 5 PIN
MICROCHIP
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