Linear Technology LTM8003 Quick setup guide

dc2416afa

DEMO MANUAL DC2416A

Description

LTM8003

40VIN, 3.5A Step-Down

μModule Regulator

Demonstration circuit 2416A features the LT M

8003, a

40V, 3.5A step-down μModule

Regulator. This demo

circuit is configured to deliver a 5.0V output from an input

voltage between 6.0V to 40V at a switching frequency

of 2MHz. The wide input range of the LTM8003 allows

a variety of input sources such as automotive batteries

and industrial supplies. Under light load conditions, the

available Burst Mode

operation supports high efficiency

with low output ripple.

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

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

respective owners.

performance summary

BoarD photo

The demo board has an EMI filter installed. The EMI per-

formance of the board is shown in Figure 3.

The LTM8003 data sheet gives complete description of

the device, operation and application information. The data

sheet must be read in conjunction with this demo manual

prior to working on or modifying demo circuit 2416A.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2416A

Specifications are at TA= 25°C

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VIN Input Supply Range 6 40 V

VOUT Output Voltage 4.75 5 5.25 V

IOUT Output Current VIN = 12V 3.5 A

fSW Switching Frequency VIN = 12V, IOUT = 3.5A 2 MHz

VOUT(AC) Output Ripple VIN = 12V, IOUT = 3.5A 20 mV

ηEfficiency VIN = 12V, IOUT = 3.5A 91.6 %

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dc2416afa

DEMO MANUAL DC2416A

Quick start proceDure

DC2416A is an easy way to evaluate the performance of

the LTM8003. 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. See Figure 2 for proper scope

probe technique.

1. Place JP1 in Burst position.

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

VEMI and GND.

3. Turn on the power at the input.

NOTE:Make sure that the input voltage does not exceed

40V.

4. Check for the proper output voltage between VOUT and

GND (VOUT = 5V).

NOTE:If there is no output, temporarily disconnect the

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

5. Once the proper output voltage is established, adjust

the load within the operating range and measure the

output voltage regulation, ripple voltage, efficiency and

other parameters.

6. An external clock can be added to the SYNC terminal

when SYNC function is used (JP1 on the SYNC posi-

tion). Make sure that R1 be chosen to set the switching

frequency equal toor below thelowest SYNC frequency.

JP1 can also set the regulator in pulse-skipping mode

(FloatingJP1)or spread spectrum mode (JP1 on SYNC,

and set it high between 3.2V and 4.2V).

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DEMO MANUAL DC2416A

Figure 1. DC2416A Proper Equipment Setup

OR V

OUT

GND

Quick start proceDure

Figure 2. Measuring Input or Output Ripple

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dc2416afa

DEMO MANUAL DC2416A

Quick start proceDure

AMPLITUDE (dBµV/m)

–15

–10

–5

FREQUENCY (MHz)

30 130 230 330 530430 630 730 830 930

DC2416A F03a

CLASS 5 AVG

WITH SS, AV H

AMPLITUDE (dBµV/m)

–15

–10

–5

FREQUENCY (MHz)

30 130 230 330 530430 630 730 830 930

DC2416A F03b

CLASS 5 AVG

WITH SS, AV V

AMPLITUDE (dBµV/m)

–15

–10

–5

FREQUENCY (MHz)

30 130 230 330 530430 630 730 830 930

DC2416A F03c

CLASS 5 PEAK

DATA

AMPLITUDE (dBµV/m)

–15

–10

–5

FREQUENCY (MHz)

30 130 230 330 530430 630 730 830 930

DC2416A F03d

CLASS 5 PEAK

DATA

Figure 3. DC2416A EMI Performance in CISPR25 Radiated Emission

Test with and without Spread Spectrum (14VIN, IOUT = 3.5A)

(3a) Horizontal Polarization, Average, with Spread Spectrum (3b) Vertical Polarization, Average, with Spread Spectrum

(3c) Horizontal Polarization, Peak, without Spread Spectrum (3d) Vertical Polarization, Peak, without Spread Spectrum

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dc2416afa

DEMO MANUAL DC2416A

Quick start proceDure

LOAD CURRENT (A)

EFFICIENCY (%)

3.5

DC2416A F05

80 2

1.50.5 2.5 3

VIN = 12V

VIN = 24V

Figure 4. DC2416A Thermal Performance (12VIN, IOUT = 3.5A, TA= 25°C)

(4a) VIN = 12V (4b) VIN = 24V

Figure 5. DC2416A Efficiency

vs Load Current (TA= 25°C)

Figure 6. Output Noise Spectrum

with 3.5A Load Current (VIN = 12V)

FREQUENCY (MHz)

0.5

INTENSITY (dBm)

–80

–40

DC2416A F06

–100

–60

–20

–120 2

10 2.5 3.51.5 3 4.54

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DEMO MANUAL DC2416A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 C1 CAP., CER., X7R, 0.1µF, 25V, 10% 0603 MURATA, GRM188R71E104KA01D

2 1 C3 CAP., ALUM., 56µF, 50V SUN ELECTRONIC INDUSTRIES CORP., 50HVT56M

3 2 C4, C8 CAP., CER., X7R, 10µF, 50V, 10% 1210 MURATA, GRM32ER71H106KA12L

4 1 C5 CAP., CER., X7S, 100µF, 6.3V, 20% 1210 MURATA, GRM32EC70J107ME15L

5 1 C6 CAP., CER., X7R, 1µF, 10V, 10%, 0603 MURATA, GRM188R71A105KA61D

6 1 C7 CAP., CER., X7R, 4.7µF, 50V, 20% 1206 MURATA, GRM31CR71H475KA12L

7 1 C10 CAP., CER., X7R, 0.1µF, 50V, 10% 0402 TDK, C1005X7R1H104K050BB

8 2 C11, C12 CAP., CER., X7R, 0.1µF, 50V, 10% 0603 AVX, 06035C104KAT2A

9 1 R1 RES., CHIP, 18.2k, 1/10W, 1% 0603 VISHAY, CRCW060318K2FKEA

10 1 R2 RES., CHIP, 0Ω, 1/10W, 1% 1206 VISHAY, CRCW12060000Z0EA

11 2 R3, R5 RES., CHIP, 100k, 1/10W, 1% 0603 VISHAY, CRCW0603100KFKEA

12 1 FB1 CHIP BEAD IND., 0805 TDK, MPZ2012S300AT000

13 1 R4 RES., CHIP, 24.3k, 1/10W, 1% 0603 VISHAY, CRCW060324K3FKEA

14 1 U1 IC., BGA, LTM8003, 48PIN LINEAR TECH., LTM8003HY#PBF

Additional Demo Board Circuit Components

1 0 C2, C9 (OPT) CAP., 0603

2 0 R6 (OPT) RES., 0603

Hardware: For Demo Board Only

1 10 E1-E10 TESTPOINT, TURRET, .094" PBF MILL-MAX, 2501-2-00-80-00-00-07-0

2 1 JP1 HEADER 3 PIN 0.079 SINGLE ROW WURTH ELEKTRONIK, 62000311121

3 1 XJP1 SHUNT, .079" CENTER WURTH ELEKTRONIK, 60800213421

4 4 MH1-MH4 STAND-OFF, NYLON 0.50" WURTH ELEKTRONIK, 702935000

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dc2416afa

DEMO MANUAL DC2416A

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

1. ALL RESISTORS ARE 0603.

ALL CAPACITORS ARE 0603.

NOTE: UNLESS OTHERWISE SPECIFIED

VEMI

6V - 40V

TR/SS

PGOOD

VOUT

5V / 3.5A

SYNC

GND

BURST

SYNC

MODE

BIAS

RUN

VIN

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

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.

www.linear.com

DEMO CIRCUIT 2416A

Monday, April 11, 2016 11

N/A

LTM8003HY

40VIN, 3.5A STEP-DOWN µMODULE REGULATOR

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

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.

www.linear.com

DEMO CIRCUIT 2416A

Monday, April 11, 2016 11

N/A

LTM8003HY

40VIN, 3.5A STEP-DOWN µMODULE REGULATOR

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

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.

www.linear.com

DEMO CIRCUIT 2416A

Monday, April 11, 2016 11

N/A

LTM8003HY

40VIN, 3.5A STEP-DOWN µMODULE REGULATOR

100uF

1210

24.3K

18.2K

10uF

50V

1210

C10

0.1uF

50V

0402

OPT

LTM8003HY

RUN

VIN

TR/SS

RUN

TR/SS

A5 RT

GND

C3 GND

GND

SYNC A2

BIAS G1

BIAS G2

PG B1

FB F1

SYNC B2

VOUT G3

VOUT G4

VOUT G5

VOUT G6

VOUT H1

VOUT H2

VOUT H3

VOUT H4

VOUT H5

VOUT H6

PG C1

FB F2

GND

C11

0.1uF

50V

4.7uF

1206

50V

1uF

10V

C12

0.1uF

50V

JP1

1206 C9

OPT

100K

10uF

1210

50V

E10

100K

56uF

50V

50HVT56M E4

0.1uF C2

OPT

FB1

MPZ2012S300A

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dc2416afa

DEMO MANUAL DC2416A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0616 REV A • 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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