Linear Technology DC1696 Quick setup guide

dc1696f

DEMO MANUAL DC1696

DESCRIPTION

LTM8026

36V, 5A, CVCC Step-Down µModule Regulator

Demonstration circuit 1696 is a 36V, 5A, CVCC step-down

μModule regulator featuring the LTM8026. The demo

circuit is designed for a 3.3V output from an input volt-

age range of 6V to 36V. The output can source 5A. The

circuit can be operated in either constant voltage mode

or constant current mode.

L, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks of

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

PERFORMANCE SUMMARY

BOARD PHOTO

The LTM8026 data sheet gives a complete description of

the part, operation and application information. The data

sheet must be read in conjunction with this quick start

guide prior to working on or modifying demo circuit 1696.

Design files for this circuit board are available at

http://www.linear.com/demo

(TA= 25°C)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Supply Voltage Range 636V

Output Voltage IOUT = 5A 3.135 3.3 3.465 V

Switching Frequency 550 kHz

Maximum Output Current 5A

Efficiency VIN = 12V, IOUT = 5A 86 %

dc1696f

DEMO MANUAL DC1696

QUICK START PROCEDURE

Figure 1. Proper Measurement Equipment Setup

Demonstration circuit 1696 is an easy way to evaluate

the performance of the LTM8026. 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

and GND or VOUT and GND terminals.

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

and GND.

VIN

IIN IOUT

VOUT

POWER SUPPLY

2. Connect a load to VOUT and GND.

3. Turn on the power at the input.

4. Check for the proper output voltage and current.

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 and input within the operating ranges and observe

the output voltage regulation, output current regulation,

ripple voltage, efficiency and other parameters.

dc1696f

DEMO MANUAL DC1696

QUICK START PROCEDURE

Figure 2. DC1696A Output Noise Spectrum. (VIN = 12V, VOUT = 3.3V, IOUT = 5A)

FREQUENCY (MHZ)

–120

INTENSITY (dBm)

–20

–40

–60

–80

–100

0.5 3 3.5 4 4.5 51 1.5 2

1696 F01

2.5

dc1696f

DEMO MANUAL DC1696

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 CIN1 Cap., Ceramic 10μF, 50V, 10%, 1210 Murata GRM32ER71H106K

2 1 CIN2 Cap., Alum 22μF, 50V, 10%, OSCON-CE-6.3 SUNCON 50CE22BSS

3 1 COUT1 Cap., X5R 100μF, 6.3V, 20%, 1210 TDK C3225X5R0J107M

4 1 COUT3 Cap., OSCON 330μF, 4V, 20%, OSCON-C6 SANYO 4SVPC330M

5 1 C1 Cap., NPO 1000pF, 50V, 20%, 0603 AVX 06035A102MAT1A

6 1 C2 Cap., X7R 1500pF, 25V, 10%, 0603 AVX 06033C152KAT1A

7 1 R1 Res., Chip 10k, 0.06W, 5%, 0603 Vishay CRCW060310K0JNEA

8 2 R2, R3 Res., Chip 100k, 0.06W, 5%, 0603 Vishay CRCW0603100KJNEA

9 1 R4 Res., Chip 301k, 0.06W, 1%, 0603 Vishay CRCW0603301KFKEA

10 1 R5 Res., Chip 75.0k, 0.06W, 1%, 0603 Vishay CRCW060375K0FKEA

11 1 R6 Res., Chip 5.62k, 0.06W, 1%, 0603 Vishay CRCW060335K62FKEA

12 1 R7 Res., Chip 510k, 0.06W, 5%, 0603 Vishay CRCW0603510KJNEA

13 1 U1 I.C.,Step-Down Converter.

LGA(81)15mm ×11.25mm ×2.82mm

Linear Tech. Corp. LTM8026EV

Additional Demo Board Circuit Components

1 0 COUT2 (OPT) Cap., 1210

2 0 C3 (OPT) Cap., 1206

3 0 C4 (OPT) Cap., 1210

4 0 C5 (OPT) Cap.

5 0 FB1 (OPT) Ferrite Bead, 1206

6 0 L1 (OPT) Inductor

7 0 R8 (OPT) Res., 0603

Hardware For Demo Board Only

1 5 E1, E2, E3, E8, E9 Turret, Testpoint MILL-MAX 2501-2-00-80-00-00-07-0

2 4 E4, E5, E6, E7 Turret, Testpoint MILL-MAX 2308-2-00-80-00-00-07-0

3 2 JP1, JP2 Headers, Single Row 3 Pins 2mm Ctrs. SAMTEC TMM-103-02-L-S

4 4 J1, J2, J3, J4 Connector, Banana Jack KEYSTONE 575-4

5 2 XJP1, XJP2 Shunt, 2mm Ctrs. SAMTEC 2SN-BK-G

dc1696f

DEMO MANUAL DC1696

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

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VOUT

VIN

EVIN VIN

REVISION HISTORY

DESCRIPTION DATE

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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

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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

'(02&,5&8,7$

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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

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dc1696f

DEMO MANUAL DC1696

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0212 • 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 applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

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