Linear Technology DC1900A Guida rapida alla configurazione

dc1900af

DEMO MANUAL DC1900A

Description

LTM4644EY

Quad 4A Output Step-Down

µModule Regulator

Demonstration circuit 1900A features the LT M

4644EY

µModule

regulator, a high-performance high-efficiency

quad output step-down regulator. The LTM4644EY has an

operating input voltage range of 4V to 14V and is able to

provide up to 4A of output current from each of its phases.

Each output’s voltage is programmable from 0.6V to 5.5V.

The LTM4644EY is a DC/DC point of load regulator in a

9mm × 15mm × 5.01mm BGA package requiring only a

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

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

performance summary

BoarD photo

few input and output capacitors. Output voltage tracking

is available through the TRACK/SS pin for supply rail se-

quencing. External clock synchronization is also available

through the CLKIN pin. The LTM4644 data sheet must be

readinconjunctionwiththisdemomanualpriortoworking

on or modifying demo circuit 1900A.

Design files for this circuit board are available at

http://www.linear.com/demo/DC1900A

Specifications are at TA= 25°C

PARAMETER CONDITIONS VALUE

Input Voltage Range 4V to 14V

Output Voltage VOUT Jumper Selectable VOUT1 = 3.3VDC, VOUT2 = 2.5VDC,

VOUT3 = 1.5VDC, VOUT4 = 1.2VDC

Maximum Continuous Load Current per Output De-rating is necessary for certain operating conditions.

See data sheet for details

4ADC

Default Operating Frequency 1MHz

Efficiency VIN = 12V, VOUT1 = 3.3V, IOUT = 4A 89% See Figure 2

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dc1900af

DEMO MANUAL DC1900A

Quick start proceDure

Demonstration circuit 1900Ais an easy way to evaluate the

performance of the LTM4644EY. Please refer to Figure 1

for test setup connections and follow the procedure below.

1. With power off, place the jumpers in the following

positions:

JP1 JP2 JP3 JP4

RUN1 RUN2 RUN3 RUN4

ON ON ON ON

JP8 JP7 JP6 JP5

MODE1 MODE2 MODE3 MODE4

CCM CCM CCM CCM

2. Before connecting input supply, loads and meters,

preset the input voltage supply to be between 4.5V to

14V. Preset the load currents to 0A.

3. With power off, connect the loads, input voltage supply

and meters as shown in Figure 1.

4. Turn on input power supply. The output voltage meters

for each phase should display the programmed output

voltage within ± 2%.

5. Once the proper output voltage is established, adjust

the load currents for each phase within the 0A to 4A

range and observe the load regulation, efficiency, and

other parameters.

6. To observe increased light load efficiency place a Mode

pin jumper (JP5-JP8) in the DCM Mode position.

Note: Optional jumper positions are available on the

DC1900A to allow for easy setup to evaluate parallel

operation of the LTM4644. For example, to parallel all

4 outputs of the LTM4644 together stuff 0Ω jumpers

for R32-R46.

Figure 1. Test Setup of DC1900A

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dc1900af

DEMO MANUAL DC1900A

Quick start proceDure

Figure 2. Measured Supply Efficiency at 5VIN and 12VIN

LOAD CURRENT (A)

EFFICIENCY (%)

123

DC1900A F01a

3.3VOUT1

2.5VOUT2

1.5VOUT3

1.2VOUT4

5VIN

LOAD CURRENT (A)

EFFICIENCY (%)

123

DC1900A F01b

3.3VOUT1

2.5VOUT2

1.5VOUT3

1.2VOUT4

12VIN

Figure 3. Measured VOUT1 = 3.3V and VOUT4 = 1.2V Load Transient Responses (2A to 4A Load Step)

Figure 4. Measured Thermal Capture with All Phases at Full Load (4A)

20µs/DIV DC1900A F03a

VOUT1

200mV/DIV

VIN = 12V

VOUT = 3.3V

2× 47µF/6.3V/CERAMIC

LOAD STEP SLEW RATE = 1A/µs

IOUT1

2A/DIV

20µs/DIV DC1900A F03b

VOUT4

200mV/DIV

IOUT4

2A/DIV

VIN = 12V

VOUT = 1.2V

2× 47µF/6.3V/CERAMIC

LOAD STEP SLEW RATE = 1A/µs

DC1900A F04

VIN = 12V

VOUT1 = 3.3V, VOUT2 = 2.5V, VOUT3 = 1.5V, VOUT4 = 1.2V

NATURAL CONVECTION

AMBIENT TEMPERATURE = 31.2°C

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dc1900af

DEMO MANUAL DC1900A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 2 C1, C3 CAP, 1206, CER. 22µF 25V X5R 20% MURATA, GRM31CR61E226KE15L

2 1 C6 CAP, 0603, X5R, 1uF, 16V 10% AVX, 0603YD105KAT2A

3 4 C9, C17, C28, C36 CAP, 1210 CER. 47µF 6.3V AVX, 12106D476MAT2A

4 4 C10, C16, C29, C35 CAP, 1206, X5R, 47uF, 6.3V, 20% TAIYO YUDEN, JMK316BJ476ML

5 1 R3 RES, 0603, 13.3kΩ 1% 1/10W VISHAY CRCW060313K3FKEA

6 1 R4 RES, 0603, 40.2kΩ 1% 1/10W VISHAY CRCW060340K2FKEA

7 2 R11 RES, 0603, 19.1kΩ 1% 1/10W VISHAY CRCW060319K1FKEA

8 1 R12 RES, 0603, 60.4kΩ 1% 1/10W VISHAY CRCW060360K4FKEA

9 1 U1 LTM4644EY, BGA-15X9-5.01 LINEAR TECH.CORP. LTM4644EY

Additional Demo Board Circuit Components

1 2 C4, C5 CAP, 1206, CER. 22µF 25V X5R 20% MURATA, GRM31CR61E226KE15L

2 1 C2 CAP, 7343, POSCAP 68µF 16V SANYO, 16TQC68MYF

3 6 C7, C21, C22, C31, C41, C42 CAP, 0603, OPTION OPTION

4 4 C8, C18, C27, C37 CAP, 7343, POSCAP, OPTION OPTION

5 8 C11, C12, C14, C15, C30, C38, C33, C34 CAP, 1206, CER., OPTION OPTION

6 2 C13, C32 CAP, 0603, CER., 100PF AVX 06033C101KAT2A

7 4 R7, R8, R15, R16 RES, 0603, 0Ω 1% 1/10W VISHAY, CRCW06030000Z0ED

8 1 R28 RES, 0805, 0Ω 5% 1/16W VISHAY, CRCW08050000Z0EA

9 4 R19, R20, R21, R22 RES, 0603, 150kΩ 5% 1/10W VISHAY CRCW0603150KJNEA

10 4 R23, R24, R25, R26 RES, 0603, 100kΩ 5% 1/10W VISHAY CRCW0603100KJNEA

11 4 R9, R10, R17, R18 RES, 0603, OPTION OPTION

12 12 R32-R35, R37-R40, R42-R45 (OPT) RES, 0603, OPTION OPTION

13 3 R36, R41, R46 (OPT) RES, 2512, 0Ω, OPTION OPTION

14 4 C25, C26, C45, C46 CAP, 0603, CER. 10µF 50V X7R TDK, C1608X7R1H104M

15 1 R1 RES., 0603, CHIP, 10k, 1% VISHAY, CRCW060310K0FKED

16 1 R2 RES, 0603, 1Ω 5% 1/10W VISHAY,CRCW06031R00JNEA

17 4 R27, R29, R30, R31 RES, 0603, 100kΩ 5% 1/10W VISHAY CRCW0603100KJNEA

Hardware

1 16 E1, E3-E17 TESTPOINT, TURRET 0.094" MILLMAX 2501-2-00-80-00-00-07-0

2 2 J1, J2 JACK, BANANA KEYSTONE 575-4

3 8 JP1-JP8 JMP, 0.079 SINGLE ROW HEADER, 3 PIN SULLINS, NRPN031PAEN-RC

4 8 XJP1-XJP8 SHUNT, .079" CENTER SAMTEC, 2SN-BK-G

5 4 STAND-OFFS STAND-OFF, SNAP ON, NYLON 0.375" TALL KEYSTONE, 8832(SNAP ON)

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dc1900af

DEMO MANUAL DC1900A

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

4V - 14V

GND

VOUT3

GND

CLKIN

TRACK2

VIN

1.5V / 4A MAX

1.2V / 4A MAX

VOUT4

GND

3.3V / 4A MAX

VOUT1

GND

2.5V / 4A MAX

VOUT2

GND

TEMP

OFF

TRACK1 TRACK3

TRACK4

OPTIONAL JUMPERS FOR

PARALLEL OPERATION

CCM

DCM

7343

RUN1 RUN2 RUN3 RUN4

7343





1210

VIN+

GND

NOTE: UNLESS OTHERWISE SPECIFIED

1. ALL RESISTORS ARE IN OHMS, 0603.

ALL CAPACITORS ARE 0603.

MODE4

CCM

DCM

MODE3

CCM

DCM

MODE2

CCM

DCM

MODE1

VIN

VOUT3

INTVCC3

INTVCC4

VOUT4

INTVCC1

SS1

FB1

VOUT1

COMP1

INTVCC2

SS2

COMP2

SS3

SS4

FB1

FB3 FB4

FB2

FB2 FB3 COMP2 COMP3

COMP1

COMP3 COMP4

COMP2

SS2 SS3

SS1

SS3 SS4

SS2

RUN2 RUN3

RUN1

RUN3 RUN4

RUN2

COMP4

COMP3

VOUT2 VOUT3

VOUT1

VOUT3 VOUT4

VOUT2

FB2 FB4

FB3

VOUT2

INTVCC1

INTVCC2

INTVCC3

INTVCC4

VIN

RUN1

RUN2

RUN3

RUN4

RUN1 RUN2 RUN3 RUN4 INTVCC4 INTVCC3 INTVCC1INTVCC2

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

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.

SCALE = NONE

www.linear.com

LTM4644EY

Tuesday, April 23, 2013 1 1

QUAD 4A STEP-DOWN MODULE REGULATOR

SAM Y.

N/A

DEMO CIRCUIT 1900A

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

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.

SCALE = NONE

www.linear.com

LTM4644EY

Tuesday, April 23, 2013 1 1

QUAD 4A STEP-DOWN MODULE REGULATOR

SAM Y.

N/A

DEMO CIRCUIT 1900A

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

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.

SCALE = NONE

www.linear.com

LTM4644EY

Tuesday, April 23, 2013 1 1

QUAD 4A STEP-DOWN MODULE REGULATOR

SAM Y.

N/A

DEMO CIRCUIT 1900A

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

SAM Y.

PRODUCTION

304-23-13

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

SAM Y.

PRODUCTION

304-23-13

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

SAM Y.

PRODUCTION

304-23-13

JP3JP3

R25

100K

R25

100K

R20

150K

R20

150K

OPT

JP7JP7

JP1JP1

10K

E4E4

R38

OPT

R38

OPT

R18

OPT

R18

OPT

C22

OPT

C22

OPT

R39

OPT

R39

OPT

22uF

25V

1206

22uF

25V

1206

C25

0.1uF

C25

0.1uF

TP2

PGOOD2

TP2

PGOOD2

C30

OPT

1206

C30

OPT

1206

R45

OPT

R45

OPT

R12

60.4K

R12

60.4K

R35

OPT

R35

OPT

E7E7

C32

100pF

C32

100pF

22uF

25V

1206

22uF

25V

1206

R28

0805

R28

0805

R46

OPT2512

R46

OPT2512

C37

OPT

C37

OPT

C21

OPT

C21

OPT

TP1

PGOOD1

TP1

PGOOD1

R10

OPT

R10

OPT

JP5JP5

C41

OPT

C41

OPT

JP2JP2

JP8JP8

C18

OPT

C18

OPT

22uF

25V

1206

22uF

25V

1206

C13

100pF

C13

100pF

E11E11

J2J2

C38

OPT

1206

C38

OPT

1206

TP3

PGOOD3

TP3

PGOOD3

E10E10

C14

OPT

1206

C14

OPT

1206

C46

0.1uF

C46

0.1uF

JP4JP4

C26

0.1uF

C26

0.1uF

47uF

6.3V

47uF

6.3V

R26

100K

R26

100K

R44

OPT

R44

OPT

R21

150K

R21

150K

R19

150K

R19

150K

E9E9

C28

47uF

6.3V

C28

47uF

6.3V

C42

OPT

C42

OPT

R17

OPT

R17

OPT

R27

100K

R27

100K

E8E8

R24

100K

R24

100K

E3E3

C11

OPT

1206

C11

OPT

1206

R34

OPT

R34

OPT

R30

100K

R30

100K

C45

0.1uF

C45

0.1uF

C12

OPT

1206

C12

OPT

1206

R33

OPT

R33

OPT

E15E15

R36

OPT2512

R36

OPT2512

R11

19.1K

R11

19.1K

R41

OPT2512

R41

OPT2512

TP4

PGOOD4

TP4

PGOOD4

R23

100K

R23

100K

E1E1

R29

100K

R29

100K

E17E17

R40

OPT

R40

OPT

JP6JP6

C29

47uF

6.3V

1206

C29

47uF

6.3V

1206

C16

47uF

6.3V

1206

C16

47uF

6.3V

1206

E14E14

C10

47uF

6.3V

1206

C10

47uF

6.3V

1206

TP5

CLKOUT

TP5

CLKOUT

C36

47uF

6.3V

C36

47uF

6.3V

E16E16

OPT

LTM4644EY

GND

VOUT1

A1 VOUT3 F1

VOUT4 J1

VOUT2

GND

PGOOD2

PGOOD3

PGOOD4

PGOOD1

TEMP F3

CLKOUT J3

INTVCC1

INTVCC2

INTVCC3 J4

INTVCC4 K5

TRACK/SS1

MODE1 B6

RUN1

TRACK/SS2

MODE2 E6

RUN2

TRACK/SS4 K6

MODE4 L6

RUN4

FB4 J7

TRACK/SS3 G6

MODE3 H6

RUN3

FB1

COMP1

CLKIN C7

FB2

COMP2

SGND

FB3 G7

COMP3 H7

COMP4 L7

VIN1 B3

VIN2 E3

VIN3 H3

VIN4 L3

SVIN1 B5

SVIN2 E5

SVIN3 H5

SVIN4 L5

GND

VOUT1

VIN3 H4

VIN4 L4

VIN2 E4

VIN1 B4

VOUT3 G1

VOUT3 G2

VOUT4 K2

VOUT4 K1

GND

E2 GND

H2 GND

GND

G3 GND

GND

D4 GND

G4 GND

GND

VOUT2

D2 VOUT2

E6E6

R31

100K

R31

100K

E13E13

40.2K

1uF

C15

OPT

1206

C15

OPT

1206

C34

OPT

1206

C34

OPT

1206

C31

OPT

C31

OPT

C17

47uF

6.3V

C17

47uF

6.3V

22uF

25V

1206

22uF

25V

1206

E5E5

68uF

16V

68uF

16V

R43

OPT

R43

OPT

E12E12

J1J1

R37

OPT

R37

OPT

R16

C33

OPT

1206

C33

OPT

1206

R32

OPT

R32

OPT

13.3K

R15

R22

150K

R22

150K

C35

47uF

6.3V

1206

C35

47uF

6.3V

1206

R42

OPT

R42

OPT

C27

OPT

C27

OPT

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dc1900af

DEMO MANUAL DC1900A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

 LINEAR TECHNOLOGY CORPORATION 2013

LT 0913 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C ) 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 LT C 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 LT C 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. LT C assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LT C 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 LT C applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

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