Linear Technology DC1923A Manuel utilisateur

dc1923af

DEMO MANUAL DC1923A

Description

LTC3129-1

15V, 200mA Synchronous Buck-Boost DC/DC

Converter with 1.3µA Quiescent Current

Demonstration circuit 1923A features the LTC3129-1, a

high efficiency 200mA buck-boost DC/DC converter with

a wide VIN and VOUT range.

The DC1923A demo board has two user selectable operat-

ing modes: Burst Mode

operation and fixed frequency

PWM (JP3). There is also an accurate programmable RUN

pin which is used to ENABLE the converter (JP1). The

LTC3129-1 also incorporates a maximum power point

controlfunctionwhichcanbeenabled(JP2)forapplications

where the input source is a solar cell or is high imped-

ance, such as intrinsically safe applications or high ZOUT

thermal electric generators (TEGs). The LTC3129-1 also

features fixed output voltages with eight user-selectable

settings (JP4, JP5, JP6). This allows the user to eliminate

the output voltage divider and the associated bias current.

The DC1923A operates with a 2.42V to 15V input voltage

range, and has been designed with the output voltage set

to 5V. The demo board can be programmed to any of the

eight voltage settings by using jumpers JP4, JP5, and JP6.

L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, Dust Networks and Dust are

registered trademarks of Linear Technology Corporation. All other trademarks are the property

of their respective owners.

Once the converter is started the LTC3129-1 can operate

with VIN as low as 1.92V provided VCC is back-fed. Consult

the data sheet for more information on these options.

The DC1923A demo board also incorporates a connector

(J1) which can be used to connect to a Dust Networks

mote demo board.

Figure 1 shows typical demo board efficiency and Figure2

shows typical step response.

The LTC3129-1 data sheet has detailed information about

the operation, specification, and applications of the part.

The data sheet should be read in conjunction with this

quick start guide.

Design files for this circuit board are available at

http://www.linear.com/demo

performance summary

Specifications are at TA= 25°C

PARAMETER TYPICAL

Input Voltage Range 2.42V to 15V

VOUT 5V; 8 User Selectable Voltages

IOUT (see Note 1) 200mA, for VIN > VOUT

Efficiency See Figure 1

Note 1: The demo board output current is a function of VIN. Please refer to the data sheet for more information.

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dc1923af

DEMO MANUAL DC1923A

Quick start proceDure

Using short twisted pair leads for any power connections

and with all loads and power supplies off, refer to Figure3

for the proper measurement and equipment setup. The

power supply (PS1) should not be connected to the circuit

until told to do so in the procedure below.

When measuring the input or output voltage ripple, care

must be taken to avoid a long ground lead on the oscil-

loscope probe. Measure the input or output voltage ripple

by touching the probe tip directly across the VIN or VOUT

and GND terminals (see Figure 4), or by using an oscil-

loscope probe tip jack.

1. Jumper, PS1 and LOAD settings to start:

PS1: OFF

JP1: RUN ON

JP2: MPPC OFF

JP3: PWM BURST MODE

JP7: DUST PWR NC

To set VOUT = 5V

JP4: VS1 VCC

JP5: VS2 VCC

JP6: VS3 GND

Figure 2. DC1923A 50mA to 100mA Output Step Response

Description

Figure 1. DC1923A Efficiency

DC1923A Efficiency vs Load, VOUT = 5V

100

LOAD (mA)

EFFICIENCY (%)

0.01 0.1 100 1000101

VIN = 3V

VIN = 5V

VIN = 10V

VIN = 15V

PWM

AutoBURST

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dc1923af

DEMO MANUAL DC1923A

Quick start proceDure

2. With power OFF connect the power supply (PS1) as

shown in Figure 3. If accurate current measurements

aredesired(forefficiencycalculationsforexample)then

connect an ammeter (AM1) in series with the supply

as shown. The ammeter is not required however.

3. Connect a 50mA load to VOUT as shown in Figure 3

(100Ω for VOUT = 5V). Connect an ammeter (AM2)

if accurate current measurement or monitoring is

desired.

4. Turn on PS1 and slowly increase voltage until the

voltage at VIN is 4V.

5. Verify VOUT is ~5V.

6. VIN can now be varied between 2.42V and 15V. VOUT

should remain in regulation.

7. Load current (IOUT) can also be varied. The maximum

IOUT is a function of VIN and the current limit. Consult

the data sheet for more information on IOUT vs VIN.

In general for VIN > VOUT IOUT can be increased to

200mA.For VIN < VOUT IOUTcapability will be reduced.

8. For operation in fixed frequency (PWM) mode move

Jumper JP3 to FIXED FREQ. See the data sheet for

more information on Burst Mode operation.

9. NOTE: If VOUT drops out of regulation, check to be

sure that VIN is not below the minimum value for

regulation (see data sheet).

For USE with a Solar Cells/MPPC:

10. With power OFF move jumper MPPC (JP2) to ON.

11. If using a power supply as the source, place a mini-

mum of 10Ω, 10W resistor in series with the input to

simulate the source resistance. If using a solar cell(s)

or high impedance source, no additional resistance

should be needed.

12. Set resistor R6 to a value which will set the MPPC

pin to the desired voltage. See the data sheet section

Programmingthe MPPC Voltageformore information.

13. With no load and the MPPC voltage set, increase the

sourcevoltageabovetheMPPC set point.VOUTshould

be in regulation. As the load is increased VIN will drop

until it reaches the MPPC set voltage. As the load is

increased further, VOUT will drop out of regulation,

but VIN will be regulated to the set point voltage. This

is to prevent the input source from collapsing and to

allow the maximum power to be extracted from the

source.

14. Consult the data sheet for more information on maxi-

mum power point control (MPPC) operation.

For USE with a DUST Networks MOTE demo board:

15. Connector J1 is designed to interface with a Dust

Networks mote demo board. Consult the Dust

documentation for optimal VOUT regulation setting.

In general the Dust Networks mote will operate with

VOUT set to 3.3V. However, care should be taken to

not overvoltage the mote. Newer motes may require

a different VOUT. The DC1923A demo board can be

configured for different VOUT voltages by simply

changing jumpers JP4, JP5 and JP6. To configure the

board for 3.3V set the jumpers as follows:

JP4: VS1 VCC

JP5: VS2 GND

JP6: VS3 GND

16. Once the output voltage has been set to the proper volt-

age and with the power supply OFF connect DC1923A

to the Dust Networks mote demo board using J1.

See Figures 5 and 6 for the proper connections and

orientation. Move jumper JP7 to VOUT.

17. Once the boards have been connected, turn on PS1

and increase the voltage to approximately 3V. VOUT

should now be in regulation. VIN can now be varied

over the operating range and VOUT should remain in

regulation.

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dc1923af

DEMO MANUAL DC1923A

Quick start proceDure

Figure 3. Proper Measurement Equipment Setup

Figure 4. Measuring Input or Output Ripple

Figure 5. DC1923A Connected to DC9003A Dust Mote (Top View)

GND

VIN

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dc1923af

DEMO MANUAL DC1923A

parts List

Quick start proceDure

Figure 6. DC1923A Connected to DC9003A Dust Mote (Bottom View)

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 C1 CAP CER 22µF 25V X5R 20% 1210 TDK, C3225X5R1E226M

2 2 C2, C4 CAP CER 1µF 25V X5R 0603 TDK, C1608X5R1E105M

3 1 C3 CAP CER 10µF 25V X5R 1210 TDK, C3225X5R1E106M

4 2 C5, C6 CAP CER 22000pF 50V X7R 10% 0603 TDK, C1608X7R1H223K

5 1 C9 CAP CER 2.2µF 10V X7R 20% 0603 TDK, C1608X7R1A225M

6 1 C10 CAP CER 10pF 50V NP0 ±0.25pF 0603 TDK, C1608C0G1H100C

7 1 L1 INDUCTOR, 10µH COILCRAFT, EPL3015-103

8 1 Q1 N-CHANNEL MOSFET, 20V, SOT23 DIODES/ZETEX, ZXMN2F30FHTA

9 3 R1, R2, R4 RES, CHIP, 2M, 1/16W, 1%, 0402 VISHAY, CRCW04022M00FKED

10 1 U1 15V, 200mA SYNCHRONOUS BUCK-BOOST DC/DC

CONVERTER WITH 1.3µA QUIESCENT CURRENT

LINEAR TECHNOLOGY, LTC3129EUD-1

Additional Demo Board Circuit Components

1 0 C7 (OPT) CAP CER 0603 OPT

2 0 C8 (OPT) CAP TANT 68µF 20V 10% SMD 7343 OPT

3 0 R3, R5, R6 (OPT) RES 1/10W 1% 0402 SMD OPT

Hardware: For Demo Board Only

1 5 E1, E2, E3, E4, E5 TESTPOINT, TURRET 0.094" MILLMAX 2501-2-00-80-00-00-07-0

2 1 J1 HEADER, 2X6, 12-PIN, SMT HORIZONTAL SOCKET w/KEY,

0.100"

SAMTEC, SMH-106-02-L-D-05

3 7 JP1-JP7 JMP, 0.079" SINGLE ROW HEADER, 3 PIN SAMTEC, TMM-103-02-L-S

47 XJP1-XPJP7 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G

5 4 (STAND-OFFS) STAND-OFF, NYLON 0.625" TALL KEYSTONE, 8834(SNAP ON)

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dc1923af

DEMO MANUAL DC1923A

schematic Diagram

D D

C C

B B

A A

OFF

RUN

MPPC

OFF

PWM

BURST MODE

FIXED FREQ

2.4V - 15V

VS1

VCC

GND

VS2

VCC

GND

VS3

VCC

GND

JP5 / VS2

GND

VOUT JUMPER CONFIGURATION

VOUT

2.5V

4.1V

5.0V

8.2V

JP4 / VS1

VCC

3.3V

15V

12V

6.9V

1. ALL RESISTORS ARE IN OHMS, 0402

ALL CAPACITORS ARE IN MICROFARADS, 0603.

NOTE: UNLESS OTHERWISE

SPECIFIED

LTC3129 - 1

GND

VCC

GND

VCC

GND

VCC

GND

JP6 / VS3

VIN > VOUT

VCC

VIN

VCC

VOUT

PWM

VCC

MPPC

MPPC PWM

RUN RUN

VS3

VS2

VS1

VCC

VS1 VS2 VS3

VOUT

PGOOD

GND

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 1923A

CONVERTER WITH 1.3uA QUIESCENT CURRENT

N/A

LTC3129EUD-1

J.NOON

01 - 02 - 13

15V, 200mA SYNCHRONOUS BUCK - BOOST DC / DC

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 1923A

CONVERTER WITH 1.3uA QUIESCENT CURRENT

N/A

LTC3129EUD-1

J.NOON

01 - 02 - 13

15V, 200mA SYNCHRONOUS BUCK - BOOST DC / DC

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 1923A

CONVERTER WITH 1.3uA QUIESCENT CURRENT

N/A

LTC3129EUD-1

J.NOON

01 - 02 - 13

15V, 200mA SYNCHRONOUS BUCK - BOOST DC / DC

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

J.NOONPRODUCTION FAB

-2 01 - 02 - 13

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

J.NOONPRODUCTION FAB

-2 01 - 02 - 13

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

J.NOONPRODUCTION FAB

-2 01 - 02 - 13

JP2JP2

JP5JP5

1uF

25V

1uF

25V

PGOOD

JP3JP3

VOUT

5.0V / 200mA

VOUT

5.0V / 200mA

JP6JP6

LTC3129EUD-1

GND

VIN

SW1 16

BST2 13

PGOOD 11

RUN

VCC

VS3 7

PGND

GND

MPPC

5PWM 10

SW2 14

BST1 1

VOUT 12

VS2 8

VS1 9

OPT

1uF

25V

1uF

25V

OPT

6.3V

OPT

6.3V

22nF

50V

22nF

50V

OPT

GND

22nF

50V

22nF

50V

OPT

VIN

EPL3015 -103

22uF

25V

1210

22uF

25V

1210

OPT

7343

OPT

7343

C10

10pF

C10

10pF

10uF

25V

1210

10uF

25V

1210

2.2uF

JP4JP4

GND

JP1JP1

Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

dc1923af

DEMO MANUAL DC1923A

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

schematic Diagram

D D

C C

B B

A A

CAUTION: ONLY

CONNECT IF VOUT IS

CONFIGURED FOR 3.3V

DUST PWR

VOUT

PGOOD

VOUT

PGOOD

VOUT

PGOOD

GND

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 1923A

CONVERTER WITH 1.3uA QUIESCENT CURRENT

N/A

LTC3129EUD-1

J.NOON

01 -02 - 13

15V, 200mA SYNCHRONOUS BUCK - BOOST DC / DC

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 1923A

CONVERTER WITH 1.3uA QUIESCENT CURRENT

N/A

LTC3129EUD-1

J.NOON

01 -02 - 13

15V, 200mA SYNCHRONOUS BUCK - BOOST DC / DC

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 1923A

CONVERTER WITH 1.3uA QUIESCENT CURRENT

N/A

LTC3129EUD-1

J.NOON

01 -02 - 13

15V, 200mA SYNCHRONOUS BUCK - BOOST DC / DC

SMH-106-02-L-D-05

VSUPPLY

1NC 2

GND

3PGOOD 4

KEY

5VBAT 6

RSVD

7EHORBAT 8

I/O 2

9I/O 1 10

+5V

11 V+ 12

ZXMN2F30FH

JP7JP7

Figure 7. Circuit Schematic

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dc1923af

DEMO MANUAL DC1923A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

 LINEAR TECHNOLOGY CORPORATION 2013

LT 0513 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C ) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT

OR EVALUATION PURPOSES ONLY and is not provided by LT C for commercial use. As such, the DEMO BOARD herein may not be complete

in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety

measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union

directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date

of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU

OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR

ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LT C from all claims

arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all

appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or

agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LT C assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LT C currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and

observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LT C applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

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