Analog Devices DC3018A Manuel utilisateur

DEMO MANUAL DC3018A

Rev. 0

DESCRIPTION

LTC 3 311S

3.3V to 1.2V at 12.5A, 2MHz Low EMI Buck

Regulator in a 1.17cm2Solution

Demonstration Circuit 3018A features the LT C

3311S

12.5A, low voltage, synchronous step-down Silent

Switcher

2 operating as a 2MHz 3.3V to 1.2V 12.5A buck

regulator. The LTC3311S supports output voltages from

0.5V to VIN with operating frequencies from 500kHz up

to 5MHz. The LTC3311S 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.

DC3018A is set up to run in forced continuous mode with

a 2MHz switching frequency but can be configured to

pulse skip mode or different switching frequencies. RT is

connected to VIN which sets the MODE/SYNC pin as an

input and allows the LTC3311S to sync from an external

clock. Connecting the MODE/SYNC pin to VIN sets the

mode to pulse skip mode and connecting the MODE/SYNC

pin to GND sets the mode to forced continuous mode.

The Efficiency vs Load graph shows the efficiency and

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

PERFORMANCE SUMMARY

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

continuous mode operation.

The DC3018A 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 LTC3311S 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

LTC3311S is assembled in a 3mm × 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

PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Voltage Range 2.25 5.5 V

VOUT Voltage Range* 1.176 1.2 1.224 V

OUTPUT Current VIN > 3V 12.5 A

Switching Frequency 1.8 2.2 MHz

Minimum On-Time 35 60 ns

*With 1% feedback resistors. Accuracy will improve to within 1% using 0.1% FB resistors.

DEMO MANUAL DC3018A

Rev. 0

QUICK START PROCEDURE

Demonstration circuit 3018A is easy to set up and evalu-

ate the performance of the LTC3311S. 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 VOUT 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 1V. If AM1 reads less than

20mA,increasePS1to3.3V.Verifythat VM1reads 3.3V

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

– 273

4. Increasethe loadby 1Aintervals upto12Aand observe

the voltage output regulation, ripple voltage, and the

voltage on the SSTT turret. Observe the switching

waveform by contacting a second voltage probe, set

to 1V scale, to the SW node of UI pins 6, 7, 8 and 9

as shown in Figure1.

5. If pulse skip mode is desired, set PS1 to 0V. Install a

100kresistorin the R3location andremove R6or short

the MODE/SYNC turret to VIN. Repeat steps 1 through

4. In step 4 observe that the switching waveform is

now operating in pulse skip mode at low currents.

6. To changethefrequency, removeR4 and R6if 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 to GND and VIN. Size the inductor, output

capacitors and compensation components to provide

the desired inductor ripple and a stable output. Refer

tothe LTC3311Sdata sheet andLTPowerCADfor 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 (50mΩ). Adjust a signal generator with a 10ms

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

2V to start.

8. Measure the I_STEP voltage to observe the current,

VI_STEP/50mΩ. 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 2.5A(RL =

0.43Ω) to 8A. Refer to the following equations:

OUT =

I_STEP

50mΩ

VGS = VSG_INPUT – VI_STEP

9. Turn off PS1 and Load. Remove all connections to

demo board.

DEMO MANUAL DC3018A

Rev. 0

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

QUICK START PROCEDURE

Figure1. Test Setup for the DC3018A Demo board

EN SSTT GND

GND

MP3

E3 E5E12

E11

E13

E2E20E1E17

E19

E18

E10

MP4

E16E15

E21

MP2MP1

E14

R12

L1U1

C11

C10

C20

C23

C22C21

C19

C12

R10

R13

GND GND

GND

PS1

AM1

VIN

SNSE SNSE SNSE SNSE

VOUT

1.2V

12.5A

I_STEP

2.25V - 5.5V

2.25V - 5.5V TP3

TP2

TP1

SG_INPUTPGOOD

(VIN MAX)

VIN EMI 20V MAX)

MODE/SYNC

JP1

SG1

OSCOPE

VM2VM1

AM2

dc3018a F01

+–

VM3

OSCOPE

LOAD

+–

DEMO MANUAL DC3018A

Rev. 0

dc3018a CS01a

140k

22µF

×3

100k

VOUT

1.2V

12.5A

6.8pF

22µF 22µF

0.1µF

AGND

MODE/SYNC

ITH

SSTT

PGOOD

0.22µF 0.1µF 0.1µF

1µF

0.22µF

15k

470pF

VIN

2.25V TO

PGND

LTC3311S

100nH

Figure3. Technique for Measuring Load Step Response

QUICK START PROCEDURE

CIRCUIT SCHEMATIC

Efficiency vs Load Current

1.2V, 12.5A Step-Down Converter

Load Transient Response Forced

Continuous Mode

3.3V

IN TO 1.2V

OUT

LOADSTEP 2.5A TO 10A 1A/µs

20µs/DIV

SG_INPUT

2V/DIV

I_STEP

200mV/DIV

1.2V

OUT

20mV/DIV

dc3018a F03

= 3.3V

OUT

= 1.2V

= 2MHz

EFFICIENCY

POWER LOSS

LOAD

(A)

100

0.4

0.8

1.2

1.6

2.0

2.4

2.8

3.2

3.6

4.0

EFFICIENCY (%)

POWER LOSS (W)

dc3018a CS01b

DEMO MANUAL DC3018A

Rev. 0

BOARD PHOTO

DEMO MANUAL DC3018A

Rev. 0

DC3018A DEMO BOARD

(WITH EMI FILTER INSTALLED)

3.3V INPUT TO 1.2V OUTPUT AT 10A, f

= 2MHz

CLASS 5 PEAK LIMIT

MEASURED EMISSIONS

AMBIENT NOISE

FREQUENCY (MHz)

100

110

–20

–10

AMPLITUDE (dBµV/m)

dc3018a ETR01

EMI TEST RESULTS

Conducted EMI Performance (CISPR25 Conducted

Emission Test with Class 5 Peak Limits)

Radiated EMI Performance (CISPR25 Radiated

Emission Test with Class 5 Peak Limits)

Radiated EMI Performance (CISPR25 Radiated

Emission Test with Class 5 Peak Limits)

DC3018A DEMO BOARD

(WITH EMI FILTER INSTALLED)

3.3V INPUT TO 1.2V OUTPUT AT 10A, f

= 2MHz

HORIZONTAL POLARIZATION

CLASS 5 PEAK LIMIT

MEASURED EMISSIONS

AMBIENT NOISE

FREQUENCY (MHz)

100

200

300

400

500

600

700

800

900

1000

–20

–10

AMPLITUDE (dBµV/m)

dc3018a ETR02

DC3018A DEMO BOARD

(WITH EMI FILTER INSTALLED)

3.3V INPUT TO 1.2V OUTPUT AT 10A, f

= 2MHz

VERTICAL POLARIZATION

CLASS 5 PEAK LIMIT

MEASURED EMISSIONS

AMBIENT NOISE

FREQUENCY (MHz)

100

200

300

400

500

600

700

800

900

1000

–20

–10

AMPLITUDE (dBµV/m)

dc3018a ETR03

DEMO MANUAL DC3018A

Rev. 0

THEORY OF OPERATION

Introduction to the DC3018A

The DC3018A demonstration circuit features the

LTC3311S, a low voltage synchronous step-down Silent

Switcher. The LTC3311S 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 current

increases, it causes a reduction in the feedback voltage

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 LT3311S 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 MOD/SYNC pin synchronizes the switching frequency

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 LTC3311S data sheet for

more detailed information.

The maximum allowable operating frequency is influ-

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

ratio of VOUT to VIN and the available inductor values. The

maximum allowable operating frequency may be calcu-

lated using a minimum tON of 35ns in the formula below.

fSW(MAX) =

OUT

VIN(MAX) • tON(MIN)

Select an operating switching frequency below fSW(MAX).

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

of the maximum LTC3311S operating load, 12.5A. Use the

formulas below to calculate the inductor value to obtain a

30% (3.75A) inductor ripple for the operating frequency.

L≥VOUT

3.75A •f

•1−VOUT

IN(MAX)

⎛

⎝

⎜⎞

⎠

⎟for VOUT

IN(MAX)

≤0.5

L≥

0.25•V

IN(MAX)

3.75A •fSW

for VOUT

VIN(MAX)

>0.5

When determining the compensation components, C4,

C10, C11 and R12, controlling the loop stability and

transient response are the two main considerations. The

LTC3311S has been designed to operate at a high band-

width for fast transient response capabilities. This reduces

output capacitance required to meet the desired tran-

sient response. 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 provide 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 in degrees.

The 0dB crossover frequency should be less than 1/6 of

the operating frequency to reduce the effects of added

phase shift of the modulator. The control loop phase mar-

gin goal should be 45° or greater and a gain margin goal

of 8dB or greater.

DEMO MANUAL DC3018A

Rev. 0

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 2 C2, C3 CAP., 22µF, X5R, 25V, 20%, 0805 AVX, 08053D226MAT2A

2 1 C4 CAP., 6.8pF, C0G, 50V, ±0.25pF, 0402 MURATA, GJM1555C1H6R8CB01D

3 3 C5, C6, C8 CAP., 47µF, X5R, 6.3V, 20%, 0805, AEC-Q200 MURATA, GRT21BR60J476ME13L

4 1 C9 CAP., 0.033µF, X7R, 25V, 10%, 0402 WURTH ELEKTRONIK, 885012205053

5 1 C11 CAP., 470pF, C0G, 50V, 5%, 0402, AEC-Q200 TDK, CGA2B2C0G1H471J050BA

6 1 L1 IND., 0.1µH, PWR, SHIELDED, 20%, 25.8A, 1.8mΩ, 4.3x4.3mm,

XEL4030, AEC-Q200

COILCRAFT, XEL4030-101MEB

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

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

9 1 R12 RES., 15k, 1%, 1/16W, 0402 VISHAY, CRCW040215K0FKED

10 1 U1 IC, LOW VOLTAGE SYN. STEP-DOWN REG, LQFN-18 ANALOG DEVICES, LTC3311SEV#PBF

Additional Demo Board Circuit Components

1 2 C1, C18 CAP., 470µF, TANT, POSCAP, 6.3V, 20%, 7343, 18mΩ, TPE PANASONIC, 6TPE470MI

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

3 0 C10, C12 CAP., OPTION, 0402

4 4 C13, C14, C16, C17 CAP., 10µF, X5R, 10V, 20%, 0603 AVX, 0603ZD106MAT2A

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

6 1 C21 CAP., 1µF, X5R, 10V, 20%, 0402 MURATA, GRM153R61A105ME95D

7 2 C22, C23 CAP., 0.1µF, X7S, 16V, 10%, 0201 MURATA, GRM033C71C104KE14D

8 1 L2 IND., 100Ω AT 100MHz, FERRITE BEAD, 25%, 8A, 6mΩ, 1812 WURTH ELEKTRONIK, 74279226101

9 1 Q1 XSTR., MOSFET, N-CH, 40V, 14A, DPAK (TO-252) VISHAY, SUD50N04-8M8P-4GE3

10 1 R1 RES., 1M, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04021M00FKED

11 1 R2 RES., 249k, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW0402249KFKED

12 0 R3, R5, R7 RES., OPTION, 0402

13 2 R4, R13 RES., 0Ω, 1/16W, 0402, AEC-Q200 VISHAY, CRCW04020000Z0ED

14 2 R6, R11 RES., 100k, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW0402100KJNED

15 1 R8 RES., 20Ω, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW040220R0FKED

16 1 R14 RES., 0.05Ω, 1%, 10W, 2818, AEC-Q200, METAL, HP VISHAY, WSHP2818R0500FEA

17 1 R15 RES., 10k, 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, PCB 0.062" THK 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, PCB 0.062" THK 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, 0.218"

KEYSTONE, 575-4

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

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

6 1 XJP4 CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421

DEMO MANUAL DC3018A

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.

SCHEMATIC DIAGRAM

D D

C C

B B

A A

1.2V

12.5A

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 02-12-202002

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

20V MAX

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

LTC3311S

DC3018A 710-DC3018A_REV02

705-DC3018A_REV02

Wednesday, February 12, 2020

5V, 12.5A 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

LTC3311S

DC3018A 710-DC3018A_REV02

705-DC3018A_REV02

Wednesday, February 12, 2020

5V, 12.5A 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

LTC3311S

DC3018A 710-DC3018A_REV02

705-DC3018A_REV02

Wednesday, February 12, 2020

5V, 12.5A SYNCHRONOUS STEP-DOWN SILENT SWITCHER 2

C23

0.1uF

0201

STNCL1 TOOL, STENCIL, DC3018A REV02

E15

JP1

TP2

E19

E13

C17

10uF

0603

R12

15k

MP1 STANDOFF,NYLON,SNAP-ON,0.50"

C10

OPT

100k

OPT

C14

10uF

0603

MP4 STANDOFF,NYLON,SNAP-ON,0.50"

TPB1

E12

249k

C12

OPT

E20

0.033uF

22uF

0805

E11

TP3

R15

10k

22uF

0805

C20

0.22uF

SUD50N04-8m8P

R11

100k

E10

MP3 STANDOFF,NYLON,SNAP-ON,0.50"

TP1

C21

1uF

C22

0.1uF

0201

L1_1

47uF

0805

0.1uH

XEL4030-101MEB

E17

140k

C18

470uF

6TPE470MI

E18

47uF

0805

E14

6.8pF

C13

10uF

0603

PCB1 PCB, DC3018A REV02

100 OHMS@100MHz

LB1 LABEL

R13

TPA1

R14

0.05

2818

10W

47uF

0805

C16

10uF

0603

MP2 STANDOFF,NYLON,SNAP-ON,0.50"

C11

470pF

470uF

6TPE470MI

E21

C15

0.1uF

OPT

LTC3311S-LQFN

SW 6

FB 18

ITH

MODE/SYNC

RT 15

PGOOD 14

SSTT

VIN

PGND

AGND

VIN

4SW 7

SW 8

SW 9

PGND

0.1uF

OPT

E16 R10

100k

C19

0.22uF

VOUT

VFB

VFBRT

SW VOUT

MODE

VOUT VIN

DEMO MANUAL DC3018A

Rev. 0

 ANALOG DEVICES, INC. 2020

09/20

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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Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and

agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted

is expressly made subject to the following additional limitations:Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board;and (ii) permit any Third

Party to access the Evaluation Board. As used herein, the term “Third Party”includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is

NOT sold to Customer;all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all

be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of

use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile

or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited

to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS

Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF

LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS”AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY

DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE

IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS

LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING

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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