Linear Technology DC2117A Guide de configuration rapide

dc2117af

DEMO MANUAL DC2117A

Description

LTC3895EFE

High Input Voltage

Synchronous Buck Converter

Demonstration circuit 2117A is a single output high volt-

age nonisolated synchronous step-down converter that

drives all N-channel MOSFET power stage. It features the

LTC3895EFE, a high voltage step-down DC/DC controller

housed in a TSSOP-38 package with several pins removed

for high voltage spacing.

This DC2117A operates over an input voltage range from

14V to 130V, while the LT C

3895 can operate up to 150V.

This demo board produces a 12V output voltage with up to

a 5A output current, and is configured with a sense resistor

for over current protection and has optional DCR sensing.

To prevent high on-chip power dissipation in high input

voltage applications, the LTC3895 includes an NDRV pin

which drives the gate of an optional external N-channel

MOSFET acting as a low dropout linear regulator to supply

IC power and is an option on this board.

An internal charge pump allows for 100% duty cycle op-

eration in dropout, a useful feature when powered from

a battery during discharge. The LTC3895’s powerful 1Ω

L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks

of Linear Technology Corporation. All other trademarks are the property of their respective

owners.

performance summary

N-channel MOSFET gate drivers can be adjusted from

5V to 10V to enable the use of logic- or standard-level

MOSFETs to maximize efficiency. The EXTVCC pin permits

the LTC3895 to be powered from the output of the switch-

ing regulator or other available source, reducing power

dissipation and improving efficiency.

A mode selector allows the DC2117A to operate in forced

continuous operation, pulse-skipping or low ripple Burst

Mode

operation during light loads. Additional features

include a power good output signal, a PLLIN, PHASEMD

and CLKOUT for multiphase operation.

The LTC3895 data sheet gives a complete description of

the part, operation and application information and must

be read in conjunction with this demo board manual.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2117A

Specifications are at TA= 25°C

Table 1.

PARAMETER CONDITIONS UNITS

Input Voltage Range DC Up to 150VPK Transient 14V ~ 130V

Output Voltage VOUT VIN = 14~130V, IOUT = 0~5A, JP4: FCM 12V ± 2% (11.76V ~ 12.24V)

Maximum Output Current IOUT(MAX) VIN = 14~130V 5A

Default Operating Frequency (Typical) 150kHz

External Clock Sync Frequency Range 75kHz to 850kHz

Typical Full Load Efficiency (See Figure 4) VIN = 48V, VOUT = 12V, IOUT = 5A, fSW = 150kHz 94.9%

*Important Note: 60V or higher voltage can result in an electric shock if care is not taken. Also, hot plugging the circuit to a power supply that has more

than 40V present at its output can produce a high voltage transient exceeding the absolute maximum input voltage which can damage the DC2117A

board.

dc2117af

DEMO MANUAL DC2117A

Quick start proceDure

Demonstration circuit DC2117A is easy to set up to evalu-

ate the performance of the LTC3895EFE. 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 VOUT and GND terminals or directly across relevant

capacitor. See Figure 2 for proper scope probe technique.

1. Place jumpers in the following positions:

JP1 ON

JP4 FCM

JP5 ON

JP8 OFF

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

and GND.

3. Turn on the power at the input.

NOTE. Make sure that the input voltage is higher than

14V and does not exceed 130V.

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.

Figure 1. Proper Measurement Equipment Setup

dc2117af

DEMO MANUAL DC2117A

Quick start proceDure

freQuency synchronization anD moDe selection

100% Duty

Table 2. Mode Selection and Synchronized Operation Options

CONFIGURATION JP4 MODE WITH SYNC SIGNAL SUPPLIED TO PLLIN

Forced Continuous Operation FCM FCM

Pulse-Skipping Operation PS PS

Burst Mode Operation with Adjustable Clamp Level BURST ADJ FCM

Burst Mode Operation with Default Clamp BURST DEFAULT FCM

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

Demonstration circuit 2117A’s mode selector allows the

converter to run in forced continuous operation, pulse-

skipping operation, Burst Mode operation or Burst Mode

operation with adjustable clamp level by changing the

position of JP4. To synchronize the DC2117A to an external

clock, apply the sync signal to the PLLIN turret. Depending

upon the JP4 setting, the DC2117A will operate in different

modes. See Table 2 for the detailed description.

+ –

OUT

GND

COUT

Demonstration circuit 2117A 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.

dc2117af

DEMO MANUAL DC2117A

optional inDuctor Dcr current sensing

low Quiescent current applications anD measurement

Demonstration circuit 2117A provides an optional circuit

for inductor DCR current sensing. Inductor DCR current

sensing uses the DCR of the inductor to sense the inductor

current instead of discrete sense resistors. Theadvantages

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 saturation current

or use an iron powder type material.

Refer to Table 3 for optional inductor DCR current sensing

setup and to the data sheet for more details.

Table 3. 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

Thetypical quiescentcurrent(IQ) ofthe LTC3895controller

is 40µA in sleep mode as specified in the LTC3895 data

sheet. However, the input current of the DC2117A board

can be higher than this value because of additional circuit

Table 4. Low Input Quiescent Current Configuration

Reference Designator R1 R2 R23 JP3 JP4 JP5 JP8

Function OVLO PGOOD INTVCC Jumper MODE Selector 100% DUTY BIAS Supply

Stuffing Option OPEN 0Ω OPEN OPEN BURST ADJ or

BURST DEFAULT

OFF OFF

outside of the IC. To reduce the total input current, large

value FB divider resistors shouldbe used. In addition,some

jumpers and resistors should be configured accordingly.

Refer to Table 4 for the low input quiescent current setup.

dc2117af

DEMO MANUAL DC2117A

eXtVcc Bias supply

By default, the DC2117A EXTVCC turret is tied to the 12V

VOUT to save IC power loss.

To power the EXTVCC from onboard bias supply:

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

from VOUT.

2. Keep the JP8 at the ON position. The onboard BIAS

supply output voltage is 12V.

Alternatively, EXTVCC can also be powered by an external

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.

Figure 3. DC2117A VOUT Typical Efficiency vs Load Current

IOUT (A)

EFFICIENCY (%)

100

50 3.52.5 4.5

DC2117a F03

30.5 1 1.5 2 4

VIN = 48V

VIN = 130V

VIN = 72V

dc2117af

DEMO MANUAL DC2117A

Figure 4. DC2117A VOUT 1.25A ~ 2.5A Load Transient at VIN = 48V

Figure 5. DC2117A VOUT 1.25A ~ 2.5A Load Transient at VIN = 130V

200µs/DIV

20MHz BW

100mV/DIV

DC2117a F04

VOUT

200µs/DIV

20MHz BW

100mV/DIV

DC2117a F05

VOUT

eXtVcc Bias supply

dc2117af

DEMO MANUAL DC2117A

parts list

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 CIN1 CAP, 100µF 20% 200V ELEC NIC NRB-XS101M200V16x20TBF

2 5 CIN2, CIN3, CIN4, CIN5, C14 CAP, 1812 0.47µF 10% 200V X7R MURATA GRM43DR72E474KW01L

3 2 CIN6, CIN7 CAP, 1210 0.1µF 10% 200V X7R MURATA GRM32DR72D104KW01L

4 1 COUT1 CAP, 1210 22µF 10% 16V X7R TDK C3225X7R1C226K

5 2 COUT2, COUT3 CAP, 7343 150µF 20% 16V AVX TPSD157M016R0125

6 3 C2, C4, C13 CAP, 0603 0.1µF 10% 25V X7R TDK C1608X7R1E104K

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

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

9 1 C7 CAP, 0603 1µF 20% 16V X7R TDK C1608X7R1C105M

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

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

12 1 C11 CAP, 1206 0.033µF 20% 200V VISHAY VJ1206Y333MXCAC

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

14 1 C15 CAP, 1210 4.7µF 20% 16V X7R AVX 1210YC475KAT2A

15 1 L1 IND, 33µH 15% WURTH ELEKTRONIK 7443633300

16 1 L2 IND, 470µH COILCRAFT MSS1048T-474KLB

17 1 L3 IND, 1µH VISHAY IHLP-1616BZER1R0M11

18 3 Q2, Q3, Q4 XSTR, N-CHANNEL DMOS FET INFINEON BSC520N15NS3G

19 1 RS1 RES, 2512 0.006Ω 5% 1/4W VISHAY WSL25126L000FEA18

20 1 R1 RES, 0603 191kΩ 1% 1/10W VISHAY CRCW0603191KFKEA

21 1 R2 RES, 0603 1.74kΩ 1% 1/10W VISHAY CRCW06031K74FKEA

22 1 R6 RES, 0603 301kΩ 1% 0.1W VISHAY CRCW0603301KFKEA

23 8 R8, R10, R22, R24, R27, R28,

R29, R35

RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA

24 1 R9 RES, 0603 10MΩ 5% 1/10W VISHAY CRCW060310M0JNEA

25 1 R12 RES, 0603 2.2Ω 5% 1/10W VISHAY CRCW06032R20JNEA

26 1 R13 RES, 0603 10kΩ 1% 1/10W VISHAY CRCW060310K0FKEA

27 1 R14 RES, 0603 10kΩ 5% 1/10W VISHAY CRCW060310K0JNEA

28 1 R15 RES, 0603 140kΩ 1% 1/10W VISHAY CRCW0603140KFKEA

29 3 R16, R17, R23 RES, 0603 100kΩ 5% 1/10W VISHAY CRCW0603100KJNEA

30 1 R18 RES, 0603 49.9kΩ 1% 0.1W VISHAY CRCW060349K9FKEA

31 1 R25 RES, 0603 30.1kΩ 1% 1/10W VISHAY CRCW060330K1FKEA

32 1 R26 RES, 0603 80.6kΩ 1% 1/10W VISHAY CRCW060380K6FKEA

33 2 R30, R36 RES, 0603 10Ω 1% 1/10W VISHAY CRCW060310R0FKEA

34 1 R31 RES, 0603 2MΩ 1% 1/10W VISHAY CRCW06032M00FKEA

35 1 R32 RES, 0603 267kΩ 1% 1/10W VISHAY CRCW0603267KFKEA

36 1 R34 RES, 0603 196kΩ 1% 1/10W VISHAY CRCW0603196KFKEA

37 1 U1 IC, SYNCHRONOUS BUCK CONVERTER LINEAR TECH. LTC3895EFE

38 1 U2 IC, SYNCHRONOUS STEP DOWN REGULATOR LINEAR TECH LTC3639EMSE

dc2117af

DEMO MANUAL DC2117A

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Additional Demo Board Circuit Components

1 0 CIN8 CAP, 1812 OPTION OPTION

2 0 COUT4 CAP, 7343 OPTION OPTION

3 0 C1, C5, C8, C16 CAP, 0603 OPTION OPTION

4 0 D1, D2 DIODE, OPTION OPTION

5 0 L1 - ALTERNATE IND, 33µH 15% WURTH ELEKTRONIK 7443643300

6 0 L4 IND, 22µH OPTION COILCRAFT SER2915H-223KL OPTION

7 0 Q1 XSTR, POWER OPTION

8 0 Q5 XSTR, NMOS OPTION OPTION

9 0 Q6, Q7 XSTR, OPTIMOS POWER - TRANSISTOR OPTION INFINEON IPD320N20N3 G OPTION

10 0 Q12, Q13 XSTR, OPTION OPTION

11 0 R3, R4, R5, R7, R11, R19, R20,

R21, R37, R38, R39, R40

RES, 0603 OPTION OPTION

12 0 R33 RES, 1206 OPTION OPTION

Hardware: For Demo Board Only

1 11 E2, E3, E4, E5, E6, E7, E8, E9,

E10, E11, E12

TURRET MILL-MAX 2501-2-00-80-00-00-07-0

23 JP1, JP5, JP8 HEADER, 3PIN, 2mm SULLINS NRPN031PAEN-RC

3 1 JP2 HEADER, 4PIN 2mm SULLINS NRPN041PAEN-RC

4 3 JP3, JP6, JP7 HEADER, 2PIN, 2mm SULLINS NRPN021PAEN-RC

5 1 JP4 HEADER, DOUBLE ROW 2X4 2mm SULLINS NRPN042PAEN-RC

6 4 J1, J2, J3, J4 JACK, BANANA KEYSTONE 575-4

7 8 XJP1, XJP2, XJP3, XJP4, XJP5,

XJP6, XJP7, XJP8

SHUNT, 2mm SAMTEC 2SN-BK-G

8 4 STANDOFF, SNAP ON KEYSTONE_8833

parts list

dc2117af

DEMO MANUAL DC2117A

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

A A

B B

C C

D D

VOUT

GND

FCM

P.S.

BURST ADJ.

BURST DEFAULT

7443633300

MSS104BT

3PROD 06/26/15 W_

4PROD - Parts addition 03/30/16 W_

SENSE1-

SENSE1+

VOUT

SENSE1+

SENSE1-

EXTVCC

INTVCC

VIN

INTVCC

VIN

VOSP

VIN

2SW

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

Tuesday, May 03, 2016

HIGH INPUT VOLTAGE SYNCHRONOUS

W _A

N/A

LTC3895EFE

DEMO CIRCUIT 2117A

BUCK CONVERTER

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

Tuesday, May 03, 2016

HIGH INPUT VOLTAGE SYNCHRONOUS

W _A

N/A

LTC3895EFE

DEMO CIRCUIT 2117A

BUCK CONVERTER

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

Tuesday, May 03, 2016

HIGH INPUT VOLTAGE SYNCHRONOUS

W _A

N/A

LTC3895EFE

DEMO CIRCUIT 2117A

BUCK CONVERTER

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

PROTO

105/28/13

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

PROTO

105/28/13

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

PROTO

105/28/13

1nF

COUT3

OPT

7343

VIN

14V - 130V

R10

R16

100k

OPT

BSC520N15NS3G

OPT

GND

1uF

R21

OPT

VOUT

12V, 5A

E11

PGOOD

E10

R13

10K 1%

CIN3

0.47uF

200V

R31

R4 OPT

L2 470uH

BSC520N15NS3G

JP4

MODE

1 2

3 4

5 6

7 8

R25

30.1k

C15

4.7uF

16V

R36

LTC3895EFE

INTVCC 38

OVLO

VPRG

DRVSET

DRVUV

19 TG 20

FREQ

PGOOD

RUN 34

PHASMD 36

SENSE1-

GND

BG 24

BOOST 22

PLLIN

SENSE1+

GND

NDRV 28

DRVCC 26

GND

MODE

EXTVCC 32

VIN 30

VFB

ITH

CLKOUT

CPUMP_EN

ILIM 37

GND

SW 21

1.0uH

R30

R2 1.74k 1%

R17

100k

OPT

R29

C16 OPT

VIN-

CIN6

0.1uF

200V

1210

PLLIN

R19

OPT

R15

140k 1%

C11

0.033uF

200V

OPT

1R35

10M

R28 0

CIN5

0.47uF

200V

JP8

OFF

VBIAS

R20

OPT

C2 0.1uF

L1 33uH

191k

C9 10pF R12

2.2

JP6

OPT R37 OPT

VIN

JP7

C12

4.7uF

C8 OPT

0.1uF

COUT2

150uF

16V

7343

CIN4

0.47uF

200V

CLKOUT

R18

49.9k

C6 4700pF

COUT4

OPT

7343

R27

0R40 OPT

MODE

JP5

OFF

100% DUTY

OPT

R32

267k

R38

OPT

R14

10k

OPT

R34

196k

C1 OPT

CIN1

100uF

200V

CIN8

OPT

200V

C14

0.47uF

200V

1812

C10 100pF

R24 0

R39

OPT

301k

R26

80.6k

RS1 0.006

2512

JP2

120

180

PHASE MD

LTC3639EMSE

SW 1

VIN

FBO

VPRG1 7

VPRG2 6

GND

VFB 9

SS 10

ISET

OVLO

RUN

GND

R33

OPT

R22 0

CIN2

0.47uF

200V

JP3

OPT

CIN7

0.1uF

200V

1210

R11

OPT

JP1

OFF

RUN

COUT1

22uF

16V

1210

R8 0

R23

100K

E12

EXTVCC

GND

C13

0.1uF

RUN

dc2117af

DEMO MANUAL DC2117A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0616 • PRINTED IN USA

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:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

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