Linear Technology DC2268A-E Guide de configuration rapide

dc2268aef

DEMO MANUAL DC2268A-E

DESCRIPTION

LTM4630EY-1

Dual 18A or Single 36A

μModule Regulator

Demonstration circuit 2268A-E is a high efficiency, high

density, dual 18A, switch mode step-down power supply

on a compact 1.5'×1.2' PCB. It features the LTM4630-1

μModule regulator. The input voltage is from 4.5V to 15V.

The output voltage is programmable from 0.6V to 1.8V.

DC2268A-E can deliver up to 18A maximum in each chan-

nel. With the help of external compensation, ±3% transient

accuracy can be achieved with 25% load step. As explained

in the data sheet, output current derating is necessary

for certain VIN, VOUT, and thermal conditions. The board

operates in continuous conduction mode in heavy load

conditions. For high efficiency at low load currents, the

resistor jumper (R1/R2) selects pulse-skipping mode for

noise sensitive applications or Burst Mode

in less noise

sensitive applications. Tw o outputs can be connected in

parallelforasingle36Aoutputsolutionwithoptionaljumper

resistors. The board allows the user to program how its

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

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

owners.

output ramps up and down through the TRACK/SS pin.

Remote output voltage sensing is available for improved

output voltage regulation at the load point. An optional

input inductor L1 reduces the EMI noise for noise sensitive

applications. DC2268A can be easily inserted to an edge

connector for testing and debugging. These features and

the availability of the LTM4630-1EY in a compact 16mm

×16mm × 5.01mm BGA package make it ideal for use in

many high-density point-of-load regulation applications.

The LTM4630-1 data sheet must be read in conjunction

with this demo manual for working on or modifying the

demo circuit DC2268A-E.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2268A-E

BOARD PHOTO

Figure 1. LTM4630-1/DC2268A-E Demo Board

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dc2268aef

DEMO MANUAL DC2268A-E

QUICK START PROCEDURE

Demonstration circuit DC2268A-E is easy to set up to

evaluate the performance of the LTM4630EY-1. It can

be easily inserted to an edge connector (SAMTEC MEC2-

20-01-L-DV--TR) for testing and debugging. Please refer

to Figure 2 for proper measurement setup and follow the

procedure below:

1. Pull up the RUN1 (J1 pin 22) and RUN2 (J1 pin 24)

between 1.4V to 5V or leave them ﬂoating.

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

and meters as shown in Figure 1. Preset the load to 0A

and VIN supply to 12V.

3. Turn on the power supply at the input. The output

voltage in channel 1 should be 1.0V± 1.5% (0.985V

~ 1.015V) and the output voltage in channel 2 should

be 1.5V ± 1.5% (1.4775V ~ 1.5225V),

4. Oncethe proper outputvoltage is established,adjust the

load within the operating range and observe the output

voltage regulation, output voltage ripple, efﬁciency and

other parameters. Output ripple should be measured

at Co3 and Co4.

5. (Optional) LTM4630EY-1 can be synchronized to an

external clock signal. Remove R2 and apply a clock

signal (0~5V, square wave) to MODE-PLLIN pin.

6. (Optional) LTM4630EY-1 can be conﬁgured for a

2-phase single output at up to 36A on DC2268A-E.

Install 0Ω resistors on R26, R27, R28, R29, R32, and

remove R14, R18 R30. Output voltage is set by R7

based on equation VOUT = 0.6V(1 + 60.4k/R7).

PARAMETER CONDITIONS VALUE

Input Voltage Range 4.5V ~ 15V

Output Voltage VOUT1 VIN = 4.5V ~ 15V, IOUT1 = 0A ~ 18A 1.0V ±1.5% (0.985V ~ 1.015V)

Output Voltage VOUT2 VIN = 4.5V ~ 15V, IOUT2 = 0A ~ 18A 1.5V ±1.5% (1.4775V ~ 1.5225V)

Per-Channel Maximum Continuous Output Current Derating Is Necessary for Certain VIN, VOUT and Thermal

Conditions.

18A

Default Operating Frequency 500kHz

Resistor Programmable Frequency Range 250kHz to 780kHz

External Clock Sync. Frequency Range 400kHz to 780kHz

Efficiency of Channel 1 VIN = 12V, VOUT2 = 1.0V, IOUT2 = 18A, fSW = 500kHz 84.0% See Figure 3

Efficiency of Channel 2 VIN = 12V, VOUT1 = 1.5V, IOUT1 = 18A, fSW = 500kHz 87.9% See Figure 4

Load Transient of Channel 1 VIN = 12V, VOUT2 = 1.0V, ISTEP = 0A ~ 4.5A See Figure 5

Load Transient of Channel 2 VIN = 12V, VOUT1 = 1.5V, ISTEP = 0A ~ 4.5A See Figure 6

PERFORMANCE SUMMARY

Specifications are at TA= 25°C

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dc2268aef

DEMO MANUAL DC2268A-E

QUICK START PROCEDURE

Figure 2. Test Setup of DC2268A-E

Table 2. DC2268A Demo Circuit

DEMO BOARD NUMBER µMODULE REGULATOR ON THE BOARD OUTPUT CURRENT

DC2268A-A LTM4620 13A,13A

DC2268A-B LTM4620A 13A,13A

DC2268A-C LTM4628 8A, 8A

DC2268A-D LTM4630 18A,18A

DC2268A-E LTM4630-1 18A,18A

DC2268A-F LTM4630A 18A, 18A

DC2268A-G LTM4631 10A, 10A

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dc2268aef

DEMO MANUAL DC2268A-E

dc2268 F05

1V OUTPUT (20MHz BW) [50mV/DIV]

0A TO 4.5A LOAD STEP

QUICK START PROCEDURE

Figure 3. Measured Efficiency on Channel 1

(VOUT1 = 1.0V, fSW = 500kHz, Channel 2 Disabled)

Efficiency, 1V Efficiency, 1.5V

Figure 4. Measured Efficiency on Channel 2

(VOUT2 = 1.5V, fSW = 500kHz, Channel 1 Disabled)

ILOAD (A)

EFFICICENCY (%)

75 8 164 12

dc2268 F03

6 142 10

VIN = 12V

fSW = 500kHz

76.1

83.1

85.4 86.1 86.2

85.3

85.9

84.7

ILOAD (A)

EFFICICENCY (%)

75 8 164 12

dc2268 F04

6 142 10

78.9

85.5

88.1

89 89.3 88.9

89.2

88.4

87.9

VIN = 12V

fSW = 500kHz

Figure 5. Measured Channel 1 0A to 4.5A Load Transient (VIN = 12V, VOUT1 = 1.0V)

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dc2268aef

DEMO MANUAL DC2268A-E

dc2268 F06

1.5V OUTPUT (20MHz BW) [50mV/DIV]

0A TO 4.5A LOAD STEP

Figure 7. Thermal Performance at VIN = 12V, VOUT1 = 1.0V/14A,

VOUT2 = 1.5V/14A, fSW = 500kHz, TA= 23°C, 200LFM Airflow

QUICK START PROCEDURE

Figure 6. Measured Channel 2 0A to 4.5A Load Transient (VIN = 12V, VOUT2 = 1.5V)

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dc2268aef

DEMO MANUAL DC2268A-E

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 6 CIN1, CIN2, CIN3, CIN4, CIN5, CIN6 CAP, 1210 22µF 10% 25V X5R AVX 12103D226KAT2A

2 2 CO1, CO5 CAP, 7343 470µF 20% 2.5V POSCAP PANASONIC ETPF470M5H

3 4 CO2, CO3, CO4, CO6 CAP, 1210 100µF 10% 6.3V X5R AVX 12106D107KAT2A

4 2 C4, C13 CAP, 0603 150pF 5% 16V C0G AVX 0603YA151JAT2A

5 2 C5, C12 CAP, 0603 1000pF 5% 16V C0G AVX 0603YA102JAT2A

6 1 C6 CAP, 0603 4.7µF 20% 6.3V X5R AVX 06036D475MAT2A

7 2 C8, C14 CAP, 0603 0.1µF 10% 25V X7R AVX 06033C104KAT2A

8 2 C16, C17 CAP, 0603 10µF 20% 25V X5R TDK C1608X5R1E106M080AC

9 2 C18, C20 CAP, 0603 22µF 20% 6.3V X5R TDK C1608X5R0J226M080AC

10 1 L1 IND, 1.0µH COILCCRAFT XAL5030-102MEC

11 3 R2, R9, R22 RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA

12 3 R3, R5, R14 RES, 0603 100Ω 5% 0.1W VISHAY CRCW0603100RJNEA

13 2 R4, R15 RES, 0603 121k 1% 0.1W VISHAY CRCW0603121KFKEA

14 2 R6, R17 RES, 0603 10k 5% 0.1W VISHAY CRCW060310K0JNEA

15 1 R7 RES, 0603 90.9k 1% 0.1W VISHAY CRCW060390K9FKEA

16 1 R10 RES, 0603 7.87k 1% 1/10W VISHAY CRCW06037K87FKEA

17 1 R16 RES, 0603 14k 1% 0.1W VISHAY CRCW060314K0FKEA

18 1 R18 RES, 0603 40.2k 1% 0.1W VISHAY CRCW060340K2FKEA

19 3 R24, R25, R30 RES, 0603 10Ω 5% 0.1W VISHAY CRCW060310R0JNEA

20 1 U1 IC, VOLTAGE REGULATOR LGA LINEAR TECH. LTM4630-1EV#PBF

Additional Demo Board Circuit Components

1 0 C1, C2, C3, C7, C9, C10, C11, C15 CAP, 0603 OPTION OPTION

2 0 R1, R8, R11, R12, R13, R16, R19, R20,

R21, R23, R26, R27, R28, R29

RES, 0603 OPTION OPTION

3 0 R31, R32 RES, 2512 OPTION OPTION

Hardware: For Demo Board Only

1 1 J1 CONN., CARD EDGE 1.6mm SAMTEC MEC2-20-01-L-DV--TR

PARTS LIST

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dc2268aef

DEMO MANUAL DC2268A-E

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



OPTIONAL JUMPER FOR

1 OUTPUT CONFIGURATION

1.0V AT 18A

1.5V AT 18A



PGOOD1

RUN1

VOS1+

PGOOD2

COMP1

TRACK1

VFB1

VFB2

COMP2

RUN2

VFB2

VFB1

VOS1-_R

VOS1+_R

VOS2+_R

VOUT1

VOUT2 VOUT2

VOUT1

RUN2

RUN1

VOS1-_R

VOS1+_R

VOS2+_R

VOS2+

TRACK2

VOS1-

VOS1+

VIN2

INTVCC

VOUT1

VOS1+

VOS1-

INTVCC

VOUT2

EXTVCC

VIN1

VIN2

VOS2+

INTVCC VIN2

INTVCC

VIN1 VIN1

VOUT1 VOUT2

VOUT1

VOUT2

RUN1 RUN2

TRACK1 TRACK2

VFB1 VFB2

COMP1 COMP2

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

DEMO CIRCUIT 2268A

Monday, October 13, 2014

HIGH EFFICIENCY, STEP-DOWN, MODULE

N/A

LTM4630EY-1

` \

Yingyi Y.

REGULATOR

C:\PROJECTS\LTM4630-1\DC2268A\1013\2268A-2.DSN 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

DEMO CIRCUIT 2268A

Monday, October 13, 2014

HIGH EFFICIENCY, STEP-DOWN, MODULE

N/A

LTM4630EY-1

` \

Yingyi Y.

REGULATOR

C:\PROJECTS\LTM4630-1\DC2268A\1013\2268A-2.DSN 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

DEMO CIRCUIT 2268A

Monday, October 13, 2014

HIGH EFFICIENCY, STEP-DOWN, MODULE

N/A

LTM4630EY-1

` \

Yingyi Y.

REGULATOR

C:\PROJECTS\LTM4630-1\DC2268A\1013\2268A-2.DSN

C18

22uF

CO4

100uF

6.3V

1210

C14

0.1uF

R14

100

OPT

CIN5

22uF

25V

1210

C10

OPT

R29

OPT

4.7uF

6.3V

0.1uF

CO3

100uF

6.3V

1210

CIN6

22uF

25V

1210

R31 OPT

10K

L1 1uH

CO1

470uF

2.5V

7343

OPT

C20

22uF

C17

10uF

25V

R10

7.87k

CO6

100uF

6.3V

1210

CIN2

22uF

25V

1210

121K

R16

14k 1%

R27

OPT

R26

OPT

R15

121K 1%

100

OPT

R32

OPT

C13

150pF

R18

40.2K 1%

R11

OPT

R22

R12

OPT

P2 R7

90.9K

R24 10

CO5

470uF

2.5V

150pF

C12

1000pF

LTM4630EY-1

VOUT1

VFB1

SW1

PGOOD1

COMP1

RUN1

TRACK1

VOUTS1

VOUT2

A10

VOUT2

A11

VOUT2

A12

VOUT2

B10

VOUT2

B11

VOUT2

B12

VOUT2

C10

VOUT2

C11

VOUT2

C12

VFB2

SW2

G11

PGOOD2

COMP2

RUN2

TRACK2

VOUTS2

VIN

M10

VIN

M11

VIN

L10

VIN

L11

VIN

K10

VIN

K11

VIN

J10

VIN

J11

GND

D10

GND

D11

GND

D12

GND

E10

GND

E11

GND

E12

GND

F10

GND

F11

GND

F12

GND

G10

GND

G12

GND

H10

GND

H11

GND

H12

GND

M12

GND

L12

GND

J12

GND

K12

GND

SGND

FSET

PHASMD

DIFFP

DIFFN

CLKOUT

MODE-PLLIN

TEMP

INTVCC

EXTVCC

DIFFOUT

R19

OPT R20

OPT

R28

OPT

CIN1

22uF

25V

1210

R25 10

R23

OPT

R17

10K

OPT

VIN

GND

N/A

GND

VOS1+

GND

VOS1-

RUN1

VOS2+

RUN2

VOUT1

VOUT2

C11 OPT

R13

OPT

1000pF

R30 10

C15

OPT

C16

10uF

25V

R21

OPT

CO2

100uF

6.3V

1210

CIN4

22uF

25V

1210

100

CIN3

22uF

25V

1210

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dc2268aef

DEMO MANUAL DC2268A-E

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

 LINEAR TECHNOLOGY CORPORATION 2015

LT 0215 • 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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