Linear Technology DC2641A, LTC7801EUFD Demo Manual

DESCRIPTION

DEMO MANUAL DC2641A

LTC7801EUFD

High Input Voltage

Synchronous Buck Converter

Demonstration circuit 2641A is a single output synchro­nous buck converter featuring the LTC7801EUFD in the
24-lead QFN package. The input voltage range is from
16V to 100V and the output is 12V/10A. The DC2641A is
configured with a sense resistor for overcurrent protec
tion. Inductor DCR current sensing is optional.

The board has a lot of features including an optional
onboard NMOS LDO for DRVCC, a switch-mode power

clamp or default Burst Mode® operation, a PGOOD output
voltage monitor and PLLIN for PolyPhase® operation.

The LTC7801 data sheet gives a complete description
of the part, operation and application information and

­must be read in conjunction with this demo manual for

DC2641A.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2641A

supply for EXTVCC, jumper selectable 100% duty cycle
operation in dropout, a mode selector pin that allows
the converter to run in CCM, pulse-skip, adjustable burst

PERFORMANCE SUMMARY

PARAMETER CONDITIONS VALUE

Input Voltage Range 16V ~ 100V

Output Voltage V

Maximum Output Current I

Default Operating Frequency (Typical) 150kHz

External Clock Sync. Frequency Range 75kHz – 850kHz

Typical Full Load Efficiency (See Figure 4) V

OUT

OUT,MAX

VIN = 16~100V, I

VIN = 16~100V 10A

= 48V, V

IN

Specifications are at TA = 25°C

= 0~10A, JP4: FCM 12V ± 2% (11.76V ~ 12.24V)

OUT

= 12V, I

OUT

OUT

L, LT, LTC, LTM, Linear Technology, Burst Mode, PolyPhase and the Linear logo are registered
trademarks of Analog Devices, Inc. All other trademarks are the property of their respective
owners.

= 10A, fSW = 150 kHz 95.3%

dc2641af

1

DEMO MANUAL DC2641A

QUICK START PROCEDURE

Demonstration circuit DC2641A is easy to set up to
evaluate the performance of the LTC7801EUFD. Refer to
Figure 1 for proper measurement equipment setup and
follow the procedure below:

NOTE: When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the input or output voltage
ripple by touching the probe tip directly across the VIN
or V
capacitor. See Figure 2 for proper scope probe technique.

1. Place jumpers in the following positions:

JP1 ON

JP4 FCM

JP5 ON

JP8 OFF

and GND terminals or directly across relevant

OUT

2. With power off, connect the input power supply to V

and GND.

3. Turn on the power at the input.

NOTE: Make sure that the input voltage is higher than

16V and does not exceed 100V.

4. Check the output voltage. The output voltage should

be between 11.76V and 12.24V.

Once the proper output voltage is established, adjust

the load within the operating range and observe the
output voltage regulation, output voltage ripple, effi­ciency and other parameters.

NOTE: If there is no output, temporarily disconnect the

load to make sure that the load is not set too high.

IN

2

dc2641af

QUICK START PROCEDURE

DEMO MANUAL DC2641A

I

IN

DC2641A F01

+

I

OUT

+

–

–

LOAD

Figure 1. Proper Measurement Equipment Setup

V

IN SUPPLY

+

–

+

–

Figure 2. Measuring Input or Output Ripple Across Terminals or Directly Across Ceramic Capacitor

+ –

C

OUT

V

OUT

GND

dc2641af

3

DEMO MANUAL DC2641A

FREQUENCY SYNCHRONIZATION AND MODE SELECTION

Demonstration circuit 2641A’s Mode selector allows the
converter to run in forced continuous operation, pulse­skipping operation, Burst Mode or Burst mode with
adjustable clamp level by changing the position of JP4.
To synchronize the DC2641A to an external clock, apply
the sync signal to the PLLIN turret. Depending upon the
JP4 setting, the DC2641A will operate in different modes.
See Table 1 for the detailed description.

100% DUTY

Demonstration circuit 2641A features 100% duty cycle
operation in dropout. Set the JP5 to “ON” position to acti­vate this feature. Set JP5 to “OFF” position disables the
internal charge pump and enables boost refresh, allowing
for 99% duty cycle operation in dropout.

OPTIONAL INDUCTOR DCR CURRENT SENSING

Demonstration circuit 2641A provides an optional circuit
for Inductor DCR Current Sensing. Inductor DCR Cur-

rent Sensing uses the DCR of the inductor to sense the
inductor current instead of discrete sense resistors. The
advantages of DCR sensing are lower cost, reduced board
space and higher efficiency, but the disadvantage is a less
accurate current limit. If DCR sensing is used, be sure to
select an inductor current with a sufficiently high satura

-

tion current or use an iron powder type material.

Refer to Table 2 for Optional Inductor DCR Current Sens

-

ing setup and to the data sheet for more details.

Low Quiescent Current Applications and Measurement

The typical quiescent current (IQ) of the LTC7801 control­ler is 40µA in sleep mode as specified in the LTC7801
data sheet. However, the input current of the DC2641A
board can be higher than this value because of additional
circuit outside of the IC. To reduce the total input current,
large value FB divider resistors should be used. In addi

­tion, some jumpers and resistors should be configured
accordingly. Refer to Table 3 for the low input quiescent
current setup.

Table 1. Mode Selection and Synchronized Operation Options

CONFIGURATION JP4 MODE WITH SYNC. SIGNAL APPLIED TO PLLIN

Forced Continuous Operation FCM FCM

Pulse-Skipping Operation P.S. P.S.

Burst Mode Operation with Adjustable Clamp Level Burst ADJ. FCM

Burst Mode Operation with Default Clamp Burst Default FCM

Table 2. Optional Inductor DCR Current Sensing

CONFIGURATION RS1 R24 R28 C16 R37 R38 R39 R40

Current Sense Resistor (Default) Ref. Sch. Ref. Sch. Ref. Sch. OPEN OPEN OPEN OPEN OPEN

Inductor DCR Current Sensing 0Ω Copper OPEN OPEN Calculated Value from Data Sheet 0Ω 0Ω

Table 3. Low Input Quiescent Current Configuration

REFERENCE DESIGNATOR R1 R2 R23 JP3 JP4 JP5 JP8

Function OVLO PGOOD INTV

Stuffing Option OPEN 0Ω OPEN OPEN BURST ADJ. or

Jumper MODE Selector 100% DUTY BIAS supply

CC

BURST DEFAULT

OFF OFF

4

dc2641af

EXTVCC BIAS SUPPLY

DEMO MANUAL DC2641A

By default, the DC2641A EXTVCC turret is tied to the 12V

.

V

OUT

To power the EXTV

from on-board bias supply:

CC

1. Leave the JP7 OPEN. This step disconnects the EXTVCC
from V

OUT

.

2. Keep the JP8 at the “ON” position. The on-board BIAS
supply output voltage is 12V.

100

95

90

85

80

Efficiency (%)

75

Alternatively, EXTV

can also be powered by an external

CC

power supply:

1. Leave the JP7 OPEN.

2. Keep the JP8 at the “OFF” position.

3. Apply a DC voltage (<14V) between the EXTVCC and
GND turret, after the input voltage is established.
Ensure that EXTVCC ≤ VIN.

70

65

60

0 1 2 3 4 5 6 7 8 9 10

Figure 3. DC2641A V

I

(A) DC2641A F03

OUT

Typical Efficiency vs Load Current

OUT

VIN = 16V
VIN = 48V
VIN = 72V
VIN = 100V

dc2641af

5

DEMO MANUAL DC2641A

EXTVCC BIAS SUPPLY

20MHz BW

V

OUT

100mV/DIV

50µs/DIV

DC2641 F04

Figure 4. DC2641A V

Figure 5. Thermal Image V

0~2.5A Load Transient at VIN = 48V

OUT

48V, VO 12V at 10A No Air Flow, TA = 25°C

IN

6

dc2641af

DEMO MANUAL DC2641A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 CIN1 CAP., 100µF, ELECT, 200V, 20%, 16×20mm, THT, NRB-XS Series NIC NRB-XS101M200V16x20TBF

2 5 CIN3, CIN4, CIN8, C14,

C15

3 3 CIN2, CIN6, CIN7 CAP, 1µF, X7R, 10V, 10%, 0805 AVX 0805ZC105KAT2A

4 1 COUT1 CAP, 22µF, X7R, 16V, 10%, 1210 TDK, C3225X7R1C226K250AC

5 2 COUT2, COUT3 CAP., 150µF, TANT, 16V, 20%, 7343, D-CASE AVX TPSD157M016R0125

6 3 C2, C4, C13 CAP, 0.1µF, X7R, 25V, 10%, 0603 AVX, 06033C104KAT2A

7 1 C3 CAP, 1000pF, X7R, 50V, 10%, 0603 AVX 06035C102KAT2A

8 1 C6 CAP, 4700pF, X7R, 50V, 10%, 0603 AVX 06035C472KAT2A

9 1 C7 CAP, 1µF, X7R, 16V, 20%, 0603 TDK, C1608X7R1C105M080AC

10 1 C9 CAP, 10pF, X7R, 50V, 10%, 0603 AVX 06035C100KAT2A

11 1 C10 CAP., 100pF, C0G, 50V, 5%, 0603 AVX 06035A101JAT2A

12 1 C11 CAP, 0.1µF, X7R, 100V, 10%, 1206 AVX 12061C104KAT2A

13 1 C12 CAP, 4.7µF, X5R, 16V, 20%, 0603 TDK C1608X5R1C475M080AC

14 1 L1 IND., 33µH, PWR, 15%, 12A, 11.4mΩ, 2013 WURTH ELEKTRONIK 7443633300

15 1 L2 IND., 470µH, PWR, 10%, 0.72A, 886mΩ, 10.0×10.2×4.8mm,

16 2 Q2, Q3 XSTR., PWR MOSFET, N-CH, 120V, 44A, PG-TDSON-8, SuperSO8 INFINEON BSC190N12NS3 G

17 1 Q4 XSTR., PWR MOSFET, N-CH, 120V, 98A, PG-TDSON-8, SuperSO8 INFINEON BSC077N12NS3 G

18 1 RS1 RES, 0.006Ω, 1%, 2W, 2512, HIGH PWR, SENSE, AEC-Q200 VISHAY WSL25126L000FEA18

19 1 R6 RES., 301kΩ, 1%, 1/10W, 0603 VISHAY CRCW0603301KFKEA

20 1 R9 RES., 10MΩ, 5%, 1/8W, 0805, AEC-Q200 VISHAY CRCW080510M0JNEA

21 1 R12 RES., 2.2Ω, 5%, 1/8W, 0805, AEC-Q200 VISHAY CRCW08052R20JNEA

22 2 R13, R14 RES., 10kΩ, 5%, 1/10W, 0603, AEC-Q200 VISHAY CRCW060310K0JNEA

23 1 R15 RES., 140kΩ, 1%, 1/10W, 0603, AEC-Q200 VISHAY CRCW0603140KFKEA

24 3 R16, R17, R23 RES., 100kΩ, 1%, 1/10W, 0603 VISHAY CRCW0603100KFKEA

25 1 R18 RES., 49.9kΩ, 1%, 1/10W, 0603 VISHAY CRCW060349K9FKEA

26 1 R25 RES., 30.1kΩ, 1%, 1/10W, 0603, AEC-Q200 VISHAY CRCW060330K1FKEA

27 1 R26 RES., 80.6kΩ, 1%, 1/10W, 0603 VISHAY CRCW060380K6FKEA

28 2 R30, R36 RES., 10Ω, 1%, 1/10W, 0603 VISHAY CRCW060310R0FKEA

29 1 R31 RES., 2MΩ, 1%, 1/10W, 0603, AEC-Q200 VISHAY CRCW06032M00FKEA

30 1 R32 RES., 267kΩ, 1%, 1/10W, 0603 VISHAY CRCW0603267KFKEA

31 1 R34 RES., 196kΩ, 1%, 1/10W

32 1 U1 IC, HIGH VOLTAGE DC/DC BUCK REG., QFN-24 (4mm×5mm) LINEAR TECH. LTC7801UFD#PBF

33 1 U2 IC, SYNCHRONOUS STEP DOWN REGULATOR, 150V, 100mA,

CAP., 2.2µF, X7R, 100V, 10%, 1812 TDK, C4532X7R2A225K230KA

COILCRAFT MSS1048T-474KLB

MSS1048T Series, AEC-Q200

0603 VISHAY CRCW0603196KFKEA

LINEAR TECH LTC3639EMSE#PBF

MSOP-16

dc2641af

7

DEMO MANUAL DC2641A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Additional Demo Board Circuit Components

1 0 CIN5 (OPT) CAP, OPT 1812 OPTION

2 0 COUT4 (OPT) CAP, OPTION 7343 OPTION

3 0 C1, C5, C8, C16 (OPT) CAP, OPTION 0603 OPTION

4 0 D1 (OPT) DIODE, OPTION SOD-123 OPTION

5 0 D2 (OPT) DIODE, OPTION SOD-323 OPTION

6 0 L4 (OPT) IND., 22µH, PWR, 10%, 30A, 2.05mΩ, 27.9×19.8×15.36mm,

7 0 Q1, Q6, Q7 (OPT) XSTR, OPTION TO252-3 OPTION

8 0 Q5 (OPT) XSTR, OPTION LFPAK OPTION

9 0 Q12, Q13 (OPT) XSTR, OPT IN_PG_TS OPTION

10 0 R1 (OPT) RES, OPTION 0805 OPTION

11 8 R2, R8, R22, R24, R27,

R28, R29, R35

12 0 R7, R11, R19, R20,

R21, R37, R38, R39,
R40(OPT)

13 0 R33 (OPT) RES, OPTION 1206 OPTION

Additional

1 10 E1-E10 TEST POINT, TURRET, 0.094", MTG. HOLE MILL-MAX 2501-2-00-80-00-00-07-0

2 3 JP1, JP2, JP5 CONN., HDR, MALE, 1×3, 2mm, THT, STR WURTH ELEKTRONIK, 62000311121

3 3 JP3, JP6, JP7 CONN., HDR, MALE, 1×2, 2mm, THT, STR WURTH ELEKTRONIK, 62000211121

4 1 JP4 CONN., HDR, MALE, 2×4, 2mm, THT, STR WURTH ELEKTRONIK, 62000821121

5 4 J1, J2, J3, J4 CONN., BANANA JACK, FEMALE, THT, NON-INSULATED, SWAGE KEYSTONE 575-4

6 7 XJP1, XJP2, XJP3,

XJP4, XJP5, XJP6,
XJP7

7 4 MH1, MH2, MH3, MH4 STANDOFF, NYLON, SNAP-ON, 0.50" WURTH ELEKTRONIK, 702935000

SER2915H Series, AEC-Q200

RES, 0Ω 1/10W 0603 VISHAY CRCW06030000Z0EA

RES, OPTION 0603 OPTION

CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421

COILCRAFT SER2915H-223KL OPTION

8

dc2641af

DEMO MANUAL DC2641A

1

2

3

4

5

6

7

8

11

11

11

SCHEMATIC DIAGRAM

3

3

DL

DL

DL

VIN

RUN

VIN

E10

R9

OFF

20

10M

INTVCC

E1

VIN

R11

OPT

0805

C5

OPT

JP1

04/10/17

04/10/17

04/10/17

REVISION HISTORY

REVISION HISTORY

REVISION HISTORY

PRODUCTION

PRODUCTION

PRODUCTION

DESCRIPTION DATE APPROVEDECO REV

DESCRIPTION DATE APPROVEDECO REV

DESCRIPTION DATE APPROVEDECO REV

3

3

3

VIN

ON

RUN

132

C2 0.1uF

INTVCC

GND

VIN-

5

5

C11

17

VIN

E2

VOSP

Q3

BSC190N12NS3G

Q2

Q1

23

0.1uF

100V

1206

VOUT

E3

R36

4

4

BSC190N12NS3G

OPT

1

JP6

16

NDRV

16V - 100V

J1

J2

CIN1

100uF

200V

+

OPT

100V

1812

CIN5

4.7uF
100V

1812

CIN8

1uF

100V

0805

CIN2

4.7uF

100V

1812

CIN3

4.7uF

100V

1812

CIN4

100V

1uF

0805

CIN6

100V

1uF

0805

CIN7

R12

2.2

0805

C7

1uF

EXTVCC

19

18

RUN

EXTVCC

GND

VOUT

J3

1%

10

VOUT

RS1

0.006

L1 33uH

7443633300

3
2
1

5

3
2
1

Q4
5

C12

15

DRVCC

12V/10A

OPT

7343

COUT4

+

16V

150uF

7343

COUT3

+

7343

150uF

16V

COUT2

+

16V

22uF

1210

COUT1

2512

R38

Q5

OPT

4

BSC077N12NS3G

4

4.7uF
BG

14

GND

J4

E4

R37OPT

C16 OPT

R39

OPT

BG

OPT

3
2
1

3
2
1

SW

D1

OPT

C13

0.1uF

R22 0

12

13

SW

BOOST

U1

EXTVCC

E6

C15

16V

1812

4.7uF

1%

R30

10

EXTVCC

R32

267k

1%

R34

MSS104BT

SW

VIN

VIN

9

VFB

14

132

VBIAS

ON

Q6

23

RUN

OPT

1

TG

196k

JP2

OFF

R33

OPT

1206

SW

6

VPRG17VPRG2

OVLO

12

0

R35

SW

Q7

OPT

23

1

BG

10

SS

GND

GND
GND

NC
NC
NC
NC

FBO

ISET

5

11

BG

D2

OPT

R29

0

L2 470uH

JP7

1

2SW

0

R24

SENSE1+

SW

TG

11

TG

U2

LTC3639EMSE

3

R28 0

R40 OPT

C14

100V

1812

4.7uF

SENSE1-

VIN

R312M1%

TG

GND

25

www.linear.com

www.linear.com

www.linear.com

Fax: [phone]

Milpitas, CA 95035

Phone: [phone]

1630 McCarthy Blvd.

Fax: [phone]

Milpitas, CA 95035

Phone: [phone]

1630 McCarthy Blvd.

Fax: [phone]

Milpitas, CA 95035

Phone: [phone]

1630 McCarthy Blvd.

17

16

8

15

13
4
2

APPROVALS

APPROVALS

APPROVALS

CUSTOMER NOTICE

CUSTOMER NOTICE

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

LTC7801UFD

3

SHEET OF

SHEET OF

SHEET OF

8

LTC Confidential-For Customer Use Only

LTC Confidential-For Customer Use Only

LTC Confidential-For Customer Use Only

LTC7801UFD

LTC7801UFD

LTC7801UFD

DEMO CIRCUIT 2641A

DEMO CIRCUIT 2641A

TECHNOLOGY

TECHNOLOGY

TECHNOLOGY

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

DEMO CIRCUIT 2641A

Monday, April 10, 2017

Monday, April 10, 2017

Monday, April 10, 2017

IC NO. REV.

IC NO. REV.

IC NO. REV.

SCHEMATIC

SCHEMATIC

SCHEMATIC

TITLE:

TITLE:

TITLE:

LT

LT

LT

D L

D L

D L

PCB DES.

PCB DES.

PCB DES.

APP ENG.

APP ENG.

APP ENG.

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

7

HIGH VOLTAGE DC-DC BUCK REGULATOR

HIGH VOLTAGE DC-DC BUCK REGULATOR

HIGH VOLTAGE DC-DC BUCK REGULATOR

N/A

N/A

N/A

SIZE

DATE:

SIZE

DATE:

SIZE

DATE:

SCALE = NONE

SCALE = NONE

SCALE = NONE

6

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

5

4

OVLO

SENSE1-

SENSE1+

INTVCC

22

C3

SENSE1+

R7

C4

R6

23

1nF

SENSE1-

OPT

301k

SS24VFB1ITH

0.1uF

1%

R8 0

E7

VIN

21

R1

OPT

0805

R2 0

C1 OPT

SS

A A

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

CPUMP_EN

5

BURST DEFAULT

5 6

7 8

100k

B B

PLLIN

6

INTVCC

132

100% DUTY

ON

JP4

R17

100k

8

7

R21

R20

R19

INTVCC

JP5

OFF

1%

R18

49.9k

10

OPT

OPT

OPT

0

R27

80.6k

1%

R26

R25

30.1k

1%

R23

100K

INTVCC

PLLIN

E8

PGOOD

C C

D D

E9

3

2

1

dc2641af

GND4MODE

3

2

C6 4700pF

C10 100pF

R13

10K

VOSP

R15

140k 1%

C9 10pF

R14

10k

C8 OPT

FCM

P.S.

BURST ADJ.

MODE

1 2

3 4

R16

JP3

E5

INTVCC

MODE

DRVSET9DRVUV

FREQ

PGOOD

9

DEMO MANUAL DC2641A

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) 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 LTC 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 LTC 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. LTC assumes no liability for applications assistance,

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

LTC 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 LTC application
engineer.

Mailing Address:

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1630 McCarthy Blvd.

Milpitas, CA 95035

Copyright © 2004, Linear Technology Corporation

10

dc2641af

LT 0517 • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 2017