Analog Devices DC2629A Guide de configuration rapide

DEMO MANUAL DC2629A

Rev. 0

DESCRIPTION

LTC3310S

5V, 10A Synchronous Step Down

Silent Switcher in 3mm x3mm LQFN

Demonstration Circuit DC2629A features the LTC

3310S

10A, Low Voltage, Synchronous Step-Down Silent

Switcher

2 operating as a 2MHz 3.3V to 1.2V 10A buck

regulator. The LTC3310S supports output voltages from

0.5V to VIN with operating frequencies from 500kHz up

to 5MHz. The LTC3310S is a compact, ultralow emission,

high efficiency, and high speed synchronous monolithic

step-down switching regulator. The integrated bypass

capacitors optimize all the fast current loops and make it

easier to minimize EMI/EMC emissions by reducing layout

sensitivity. Fast minimum on-time of 35ns enables high

VIN to low VOUT conversion at high frequency.

DC2629A is set up to run in Forced Continuous Mode

with a 2MHz switching frequency but can be configured

to Pulse Skip Mode and different switching frequencies.

RT is connected to VIN which sets the MODE/SYNC pin

as an input and allows the LTC3310S to sync from an

external clock. Connecting the MODE/SYNC pin to V

sets the mode to Forced Continuous Mode and connecting

the MODE/SYNC pin to GND sets the mode to Pulse Skip

Mode. The Efficiency vs. Load graph shows the efficiency

All registered trademarks and trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

and the power loss of the circuit with a 3.3V input in

forced continuous mode operation.

The DC2629A also has an EMI filter to reduce conducted

EMI. This EMI filter can be included by applying the input

voltage at the VIN EMI terminal. The EMI performance of

the board is shown in the EMI TEST RESULTS section.

The red lines in the EMI performance graphs illustrate

the CISPR25 Class 5 peak limits for the conducted and

radiated emission tests.

The LTC3310S data sheet gives a complete description of

the part, operation and application information. The data

sheet must be read in conjunction with this demo. The

LTC3310S is assembled in a 3mm x 3mm LQFN package

with exposed pads for low thermal resistance. The layout

recommendations for low EMI operation and maximum

thermal performance are available in the data sheet sec-

tion Low EMI PCB Layout.

Design files for this circuit board are available.

Specifications are at TA= 25°C

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VIN/VIN EMI DC2629A Input Voltage Range 2.25 5.5 V

VOUT DC2629A VOUT Voltage Range 1.183 1.2 1.217 V

IOUT DC2629A Output Current 10 A

fSW Switching Frequency 1.8 2.2 MHz

EFF Efficiency VIN = 3.3V, IOUT = 5A 91 %

DEMO MANUAL DC2629A

Rev. 0

BOARD PHOTO

1.2V 10A Step-Down Converter

VIN

2.25V

TO 5.5V 22μF 1M

249k 100k

VIN

0.033μF

10k

220pF

L = XEL4030-101ME, COILCRAFT

VIN

AGND

PGOOD

VIN

MODE/SYNC

SSTT

ITH

LTC3310S

PGND

100nH

0.22μF 22μF

15pF 140k

100k

22μF

VOUT

1.2V

10A

0.22μF

DC2629A TA01a

LOAD CURRENT (A)

EFFICIENCY (%)

100

POWER LOSS (W)

05 93 7

DC2629 TA01b

104 82 61

VIN = 3.3V

VOUT = 1.2V

fOSC = 2MHz

3.0

0.3

2.7

2.1

1.5

0.9

2.4

1.8

1.2

0.6

POWER LOSS

EFFICIENCY

Efficiency vs Load Current

DEMO MANUAL DC2629A

Rev. 0

EMI TEST RESULTS

FREQUENCY (MHz)

AMPLITUDE (dBµV/m)

–10

–20

DC2629A G01

0 50 9030 70 11010040 8020 6010

PEAK LIMIT

PEAK

DC2629A DEMO BOARD

(WITH VOLTAGE APPLIED TO VIN EMI INPUT)

3.3V INPUT TO 1.2V OUTPUT AT 7.5A, fSW = 2MHz

FREQUENCY (MHz)

AMPLITUDE (dBµV/m)

DC2629A G02

0 500 900300 700 1000400 800200 600100

HORIZONTAL POLARIZATION

PEAK DETECTOR

PEAK LIMIT

PEAK

DC2629A DEMO BOARD

(WITH VOLTAGE APPLIED TO VIN EMI INPUT)

3.3V INPUT TO 1.2V OUTPUT AT 7.5A, fSW = 2MHz

FREQUENCY (MHz)

AMPLITUDE (dBµV/m)

DC2629A G03

0 500 900300 700 1000400 800200 600100

VERTICAL POLARIZATION

PEAK DETECTOR

PEAK LIMIT

PEAK

DC2629A DEMO BOARD

(WITH VOLTAGE APPLIED TO VIN EMI INPUT)

3.3V INPUT TO 1.2V OUTPUT AT 7.5A, fSW = 2MHz

CISPR25 Conducted EMI Emmisions with Class 5 Peak

Limits (Voltage Method)

Radiated EMI Performance (CISPR25 Radiated

Emmisions Test with Class 5 Peak Limits)

Radiated EMI Performance (CISPR25 Radiated

Emmisions Test with Class 5 Peak Limits)

DEMO MANUAL DC2629A

Rev. 0

QUICK START PROCEDURE

Demonstration circuit 2629A is easy to set up and evalu-

ate the performance of the LTC3310S. Refer to Figure1

for proper measurement equipment setup and follow the

procedure below:

NOTE:For accurate V

, V

OUT

and efficiency measure-

ments, measure VIN at the VIN SNSE and GND SNSE tur-

rets and V

OUT

at the V

OUT

SNSE and GND SNSE turrets as

illustrated as VM1 and VM2 in Figure1. When measuring

the input or output voltage ripple, care must be taken

to avoid a long ground lead on the oscilloscope probe.

Measure the output voltage ripple by touching the probe

tip directly across the output turrets or to TP1 as shown

in Figure2.

1. Set the JP1 Jumper to the HI position.

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

and GND. If the input EMI ﬁlter is desired, connect the

input power supply to VIN EMI and GND.

3. Slowly increase PS1 to 1.0V. If AM1 reads less than

20mA,increasePS1 to 3.3V. VerifythatVM1reads3.3V

and VM2 reads 1.2V. Record VM1, VM2, VM3 AM1

and AM2. Connect an oscilloscope voltage probe as

shown in Figure2. Set Channel to AC coupled, voltage

scale to 20mV and time base to 10µs. Record VOUT

ripple voltage. Verify that PGOOD voltage is above 3V.

Calculate Die temperature using formula below:

TJ(°C)=

SSTT

4mV

−237

(1)

4. Increase the load by 1A intervals up to 10A and observe

the voltage output regulation, ripple voltage, and the

voltage on the SSTT turret.

5. If Pulse Skip Mode is desired, set PS1 to 0V. Install

a0Ω resistor in the R6 location or short the MODE/

SYNC turret to GND. Repeat steps 1 through 4. In step

4observethattheswitchingwaveformisnowoperating

in Pulse Skip Mode at low currents.

6. To change the frequency, remove R4 and R6 if installed.

Install the desired RT resistor in the R7 location. Note,

the MODE/SYNC pin is an output when R4 is installed

and the MODE/SYNC pin should have high impedance

toGNDandVIN.Sizetheinductor,outputcapacitors and

compensationcomponentstoprovidethedesired induc-

tor ripple and a stable output. Refer to the LTC3310S

datasheet and LTPowerCAD for more information on

choosing the required components.

7. To test the transient response with a base load, add the

desired resistor to produce a minimum load between

VOUT and I_STEP turrets (RL shown on Figure 1).

Note that the total load resistance will be RL plus R14

(100mΩ). Adjust a signal generator with a10ms pe-

riod, 10% duty cycle and an amplitude from 1V to 2V

to start.

8. Measure the I_STEP voltage to observe the current,

VI_STEP/100mΩ. Adjust the amplitude of the pulse

to provide the desired transient. Adjust the rising and

falling edge of the pulse to provide the desired ramp

rate. Figure3 shows a load step from 2A(RL = 0.51Ω)

to 8A. Refer to the following equations:

IOUT =

I_STEP

100mΩ

(2)

GS =

SG_INPUT −

I_STEP

(3)

9. When done, turn off SG1, PS1 and Load. Remove all

connections to demo board.

273

DEMO MANUAL DC2629A

Rev. 0

Figure1. Test setup for the DC2629A Demo Board

Figure2. Technique for Measuring Output Ripple and Step Response

QUICK START PROCEDURE

DEMO MANUAL DC2629A

Rev. 0

QUICK START PROCEDURE

Figure3. Technique for Measuring Load Step Response

VSG_INPUT

2V/DIV

VI_STEP

200mV/DIV

200mV

1.20V

VOUT

20mV/DIV

LTC3310S DC2629A TRANSIENT

VIN = 3.3V

VOUT = 1.2V

IOUT = 2A TO 8A

20μs/DIV

DEMO MANUAL DC2629A

Rev. 0

THEORY OF OPERATION

Introduction to the DC2629A

The DC2629A demonstration circuit features the

LTC3310S, a Low Voltage Synchronous Step-Down Silent

Switcher. The LTC3310S is a monolithic, constant fre-

quency, current mode step-down DC/DC converter. An

oscillator, with frequency set using a resistor on the RT

pin, turns on the internal top power switch at the begin-

ning of each clock cycle. Current in the inductor then

increases until the top switch comparator trips and turns

off the top power switch. The peak inductor current, at

which the top switch turns off, is controlled by the volt-

age on the internal ITH node. The error amplifier servos

the ITH node by comparing the voltage on the VFB pin

with an internal 500mV reference. When the load cur-

rent increases, it causes a reduction in the feedback volt-

age relative to the reference leading the error amplifier to

raise the ITH voltage until the average inductor current

matches the new load current. When the top switch turns

off, the synchronous power switch turns on until the next

clock cycle begins or the inductor current falls to zero. If

overload conditions result in excessive current flowing

through the bottom switch, the next clock cycle will be

delayed until the switch current returns to a safe level.

If the EN pin is low, the LT3310S is in shutdown and in a

low quiescent current state. When the EN pin is above its

threshold, the switching regulator will be enabled.

The MODE/SYNC pin synchronizes the switching fre-

quency to an external clock, is a clock output or sets the

PWM mode. The PWM modes of operation are either pulse

skip or forced continuous. See the LTC3310S datasheet

for more detailed information.

The maximum allowable operating frequency is influenced

by the minimum on time of the top switch, the ratio of

VOUT to VIN and the available inductor values. The maxi-

mum allowable operating frequency may be calculated in

the formula below.

fSW(MAX) =

OUT

VIN(MAX) •TON(MIN)

(4)

Select an operating switching frequency below fSW(MAX).

Typically, it is desired to obtain an inductor current of 30%

of the maximum LTC3310S operating load, 10A. Use the

formulas below to calculate the inductor value to obtain

a 30% (3A) inductor ripple for the operating frequency.

L≥VOUT

3A •fSW

•1−VOUT

VIN(MAX)

⎛

⎝

⎜

⎞

⎠

⎟

⎟for VOUT

VIN(MAX)

≤0.5

(5)

L≥0.25•VIN(MAX)

3A •fSW

for VOUT

VIN(MAX)

>0.5

(6)

When determining the compensation components, C4,

C10, C11 and R12, controlling the loop stability and

transient response are the two main considerations. The

LTC3310S has been designed to operate at a high band-

width for fast transient response capabilities. This reduces

output capacitance required to meet the desired transient

voltage range. The mid-band gain of the loop increases

with R12 and the bandwidth of the loop increases with

decreasing C11. C4 along with R4 provides a phase lead

which will improve the phase margin. C10 along with

R12 provides a high frequency pole to reduce the high

frequency gain.

Loop stability is generally measured using the Bode Plot

method of plotting loop gain in dB and phase shift in

degrees. The 0dB crossover frequency should be less

the 1/6 of the operating frequency to reduce the effects

of added phase shift of the modulator. The control loop

phase margin goal should be 45º or greater and a gain

margin goal of 8dB or greater.

DEMO MANUAL DC2629A

Rev. 0

SCHEMATIC DIAGRAM

D D

C C

B B

A A

1.2V

10A

2.25V - 5.5V

VOUT

MODE/SYNC

GND

SSTT

PGOOD

GND

VIN

GND

VIN

GND

VOUT

GND

VOUT

SNSE

GND

SNSE

VIN

SNSE

GND

SNSE

OPT

REVISION HISTORY

ECO REV DESCRIPTION APPROVED DATE

-PRODUCTION MM 10-09-18

PCA ADDITIONAL PARTS

PULSE SKIP/SYNC

FORCED CONT

(VIN MAX)

MODE

PULSE SKIP

FORCED CONT.

R3 R4 R7

OPEN 0 or OPEN * POPULATED OR OPEN **

100k OPEN

* IF R7 IS POPULATED R4 MUST BE OPEN.

** MODE/SYNC PIN IS CLOCK OUTPUT WHEN R7 IS POPULATED.

FSW = 2MHz

CONNECT BY VOUT

SENSE ONLY

VIN EMI

OPEN

100k

2.25V - 5.5V

NOTES: UNLESS OTHERWISE SPECIFIED

1. RESISTORS: OHMS, 0402, 1%, 1/16W

2. CAPACITORS: 0402

SG_INPUT

I_STEP

OPTIONAL TRANSIENT RESPONSE CIRCUIT

VIN

GND_A

VIN

GND

GND_A

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

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

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

SIZE:

SKU NO.

SCHEMATIC NO. AND REVISION:

PCA ASS'Y DWG:

www.analog.com

N. CARLONE

M.MERCHANT

LTC3310S

DC2629A 710-DC2629A_REV05

705-DC2629A_REV05

Wednesday, October 10, 2018

5V, 10A SYNCHRONOUS STEP-DOWN SILENT SWITCHER 2

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

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

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

SIZE:

SKU NO.

SCHEMATIC NO. AND REVISION:

PCA ASS'Y DWG:

www.analog.com

N. CARLONE

M.MERCHANT

LTC3310S

DC2629A 710-DC2629A_REV05

705-DC2629A_REV05

Wednesday, October 10, 2018

5V, 10A SYNCHRONOUS STEP-DOWN SILENT SWITCHER 2

DATE:

IC NO.

SHEET OF

TITLE: DEMO CIRCUIT SCHEMATIC,

APPROVALS

PCB DES.

APP ENG.

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

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

SIZE:

SKU NO.

SCHEMATIC NO. AND REVISION:

PCA ASS'Y DWG:

www.analog.com

N. CARLONE

M.MERCHANT

LTC3310S

DC2629A 710-DC2629A_REV05

705-DC2629A_REV05

Wednesday, October 10, 2018

5V, 10A SYNCHRONOUS STEP-DOWN SILENT SWITCHER 2

E19

TP2

JP1

E15

100k

22uF

0805

E13

LTC3310S-LQFN

SW 6

VFB 18

ITH

MODE/SYNC

RT 15

PGOOD 14

SSTT

VIN

PGND

AGND

VIN

4SW 7

SW 8

SW 9

PGND

C10

OPT

C11

220pF

PCB1 PCB, DC2629A REV05

MP1 STANDOFF,NYLON,SNAP-ON,0.50"

C17

10uF

0603

E9 TPB1

15pF

MP4 STANDOFF,NYLON,SNAP-ON,0.50"

C14

10uF

0603

C12

OPT

STNCL1 TOOL, STENCIL, 700-DC2629A REV05

249k

E12

E20

E11

22uF

0805

0.033uF

SUD50N04-8M8P

R11

100k

C20

0.22uF

22uF

0805

R15

10k

TP3

TP1

MP3 STANDOFF,NYLON,SNAP-ON,0.50"

E10

140k

E17

OPT

0.10uH

XEL4030-101MEC

L1_1

R12

10k

E18

22uF

0805

C18

470uF

6TPE470MI

E14

LB1 LABEL

100 OHMS @ 100MHz

C13

10uF

0603

R14

0.1

2818

10W

TPA1

R13

470uF

6TPE470MI

22uF

0805

MP2 STANDOFF,NYLON,SNAP-ON,0.50"

C16

10uF

0603

0.1uF

OPT

C15

0.1uF

E21

C19

0.22uF

R10

100k

E16

OPT

VOUT

VFB

VFBRT

SW VOUT

MODE

VOUT VIN

DEMO MANUAL DC2629A

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog

Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications

subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 4 C2, C3, C5, C6 CAP., 22uF, X5R, 25V, 20%, 0805 SAMSUNG, CL21A226MAQNNNE

2 1 C4 CAP., 15pF, C0G, 50V, 5%, 0402 KEMET, C0402C150J5GAC7867

3 1 C9 CAP., 0.033uF, X7R, 25V, 10%, 0402 KEMET, C0402C333K3RACTU

4 1 C11 CAP., 220pF, X7R, 50V, 10%, 0402 YAGEO, CC0402KRX7R9BB221

5 2 C13, C14 CAP., 10uF, X5R, 10V, 20%, 0603 AVX, 0603ZD106MAT2A

6 1 L1 IND., 0.10uH 20% SHEILDED POWER INDUCTOR COILCRAFT, XEL4030-101MEC

7 1 R9 RES., 140k OHMS, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW0402140KFKED

8 1 R10 RES., 100k OHMS, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW0402100KFKED

9 1 R12 RES., 10k OHMS, 1%, 1/10W, 0402, AEC-Q200 PANASONIC, ERJ2RKF1002X

10 1 U1 IC, Low Voltage Syn. Stepdown Reg., LQFN-18 ANALOG DEVICES, LTC3310SEV#PBF

Additional Demo Board Circuit Components

1 2 C1, C18 CAP., 470uF, TANT. POSCAP, 6.3V, 20%, 7343,

18mOHMS, TPE

PANASONIC, 6TPE470MI

2 2 C7, C15 CAP., 0.1uF, X5R, 25V, 10%, 0402 AVX, 04023D104KAT2A

3 1 C8 CAP., 22uF, X5R, 25V, 20%, 0805 SAMSUNG, CL21A226MAQNNNE

4 2 C16, C17 CAP., 10uF, X5R, 10V, 20%, 0603 AVX, 0603ZD106MAT2A

5 2 C19, C20 CAP., 0.22uF, X7R, 16V, 10%, 0402, AEC-Q200 MURATA, GCM155R71C224KE02D

6 1 L2 IND., 100 OHMS @ 100MHz, FERRITE BEAD, 25%,

8A, 6mOHMS, 1812

WURTH ELEKTRONIK, 74279226101

7 1 Q1 XSTR., MOSFET, N-CH, 40V, TO-252 (DPAK) VISHAY, SUD50N04-8M8P-4GE3

8 1 R1 RES., 1M OHMS, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04021M00FKED

9 1 R2 RES., 249k OHMS, 1%, 1/16W, 0402 VISHAY, CRCW0402249KFKED

10 2 R3, R11 RES., 100k OHMS, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW0402100KJNED

11 2 R4, R13 RES., 0 OHM, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04020000Z0ED

12 1 R8 RES., 20 OHMS, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW040220R0FKED

13 1 R14 RES 0.1 OHM 1% 10W 2818 VISHAY DALE, WSHP2818R1000FEA

14 1 R15 RES., 10k OHMS, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW040210K0JNED

Hardware: For Demo Board Only

1 10 E1-E3, E5, E12, E14-E17, E20 TEST POINT, TURRET, 0.064", MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0

2 6 E4, E7, E10, E13, E18, E21 TEST POINT, TURRET, 0.094", MTG. HOLE MILL-MAX, 2501-2-00-80-00-00-07-0

3 5 E6, E8, E9, E11, E19 CONN., BANANA JACK, FEMALE, THT, NON-

INSULATED, SWAGE

KEYSTONE, 575-4

4 1 JP1 CONN., HDR, MALE, 1x3, 2mm, VERT, STR, THT WURTH ELEKTRONIK, 62000311121

5 4 MP1-MP4 STANDOFF, NYLON, SNAP-ON, 0.50" KEYSTONE, 8833

6 1 XJP1 CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421

DEMO MANUAL DC2629A

Rev. 0

 ANALOG DEVICES, INC. 2019

03/19

www.analog.com

ESD Caution

ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection

circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.

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BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE

HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States

federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts

(excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits

to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.

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