Linear Technology LTM8032 Guida rapida alla configurazione

dc1386bfa

DEMO MANUAL DC1386B

DESCRIPTION

LTM8032 Ultralow EMI,

36V, 2A DC/DC

µModule Regulator

Demonstration circuit 1386 features the LTM

8032, a

2A EN55022 Class B certiﬁed step-down converter. This

μModule

regulator is conﬁgured to deliver a 3.3V output

from an input voltage between 5.5V to 36V at a switching

frequency of 600kHz. The wide input range of the LTM8032

allows a variety of input sources. Under light load condi-

tions, the available Burst Mode

operation supports high

efﬁciency with low output ripple. L, LT, LTC, LTM, Linear Technology, Burst Mode, μModule and the Linear logo are registered

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

respective owners.

PARAMETER CONDITION VALUE

Input Voltage Range 5.5V to 36V

Output Voltage VOUT 3.3V

Maximum Output Current 2A

Typical Switching Frequency 600kHz

BOARD PHOTO

PERFORMANCE SUMMARY

The LTM8032 data sheet gives a complete description of

the part, operation and application information. The data

sheet must be read in conjunction with this manual to

modify demo circuit 1386.

Design ﬁles for this circuit board are available at

http://www.linear.com/demo

(TA= 25°C)

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dc1386bfa

DEMO MANUAL DC1386B

QUICK START PROCEDURE

Demonstration circuit 1386 is easy to set up to evaluate

the performance of the LTM8032. 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 on the ON position.

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 does not exceed

the maximum input voltage.

4. Check for the proper output voltage.

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 observe the

output voltage regulation, ripple voltage, efﬁciency and

other parameters.

Figure 1. Proper Measurement Equipment Setup

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dc1386bfa

DEMO MANUAL DC1386B

QUICK START PROCEDURE

Figure 2. Measuring Input or Output Ripple

GNDVIN

Figure 3. Efﬁciency

OUTPUT CURRENT (A)

0.01

EFFICIENCY (%)

0.1 1

1386 F03

100

5.5VIN

12VIN

24VIN

36VIN

PARTS LIST

ITEM QUANTITY REFERENCE-DESCRIPTION DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 C1 Cap, X7R, 2.2μF, 50V, 10%,1206 Murata GCM31CR71H225KA55L

2 1 CIN1 Cap, 22μF, 50V Sanyo 50CE22BS

3 1 C3 Cap, X5R, 22μF, 10V, 20%, 1206 AVX 1206ZD226MAT2A

4 1 C4 Cap, X7R, 0.1μF, 50V, 10%, 0603 AVX 06035C104KAT2A

5 1 R1 Res, 54.9k, 1%, 1/16W, 0603 Vishay CRCW060354K9FKEA

6 1 R2 Res, 78.7k, 1%, 1/16W, 0603 Vishay CRCW060378K7FKEA

7 2 R3, R5 Res, 100k, 1%, 1/16W, 0603 Vishay CRCW0603100KFKED

8 1 R4 Res, 10k, 5%, 1/16W, 0603 Vishay CRCW060310K0JNED

9 1 U1 IC, LTM8032EV, μModule Linear Technology LTM8032EV#PBF

Additional Demo Board Circuit Components

1 0 C10 (OPT) Cap, 1206

2 0 C11 (OPT) Cap, 22μF, 50V

3 0 L1 (OPT) Ind, High Current, Size 2525

Hardware for Demo Board Only

1 9 E1 to E9 Turret Mill-Max 2501-2-00-80-00-00-07-0

2 1 JP1 Header, 3 Pin 2mm Samtec TMM-103-02-L-S

3 1 Shunt Shunt, 2mm Samtec 2SN-BK-G

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dc1386bfa

DEMO MANUAL DC1386B

SCHEMATIC DIAGRAM

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dc1386bfa

DEMO MANUAL DC1386B

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. LinearTechnology Corporation makes no representation

that the interconnection of its circuits as described herein will not infringe on existing patent rights.

REVISION HISTORY

REV DATE DESCRIPTION PAGE NUMBER

A 04/11 Updated Board Photo

Updated Figure 1

Updated Schematic Diagram

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dc1386bfa

DEMO MANUAL DC1386B

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0411 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 direc-

tive 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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