Linear Technology DC2166A Guida rapida alla configurazione

dc2166af

DEMO MANUAL DC2166A

Description

LTM4639

Low VIN 20A DC/DC

µModule Step-Down Regulator

Demonstration circuit 2166A features the LT M

4639EY,

a20A high efficiency, switch mode step-down power

µModule

regulator. The input voltage range is from

2.375V to 7V. The output voltage range is 0.6V to 5.5V.

Derating is necessary for certain VIN, VOUT, frequency and

thermalconditions. The DC2166AofferstheTRACK/SSpin

allowing the user to program output tracking or soft-start

period.Theboardoperatesincontinuousconductionmode

in heavy load conditions. For high efficiency at low load

currents, the MODE jumper (JP3) selects pulse-skipping

mode for noise sensitive applications or Burst Mode

operation in less noise sensitive applications. There is an L, LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered

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

respective owners.

BoarD photo

on board boost circuit using LT1935 to provide control

power to LTM4639 when VIN is less than 4.5V. LTM4639

has on board diode connected PNP transistors to monitor

its internal temperature. A temperature sensor LTC2997

converts the internal temperature to an analog voltage out-

put. The LTM4639 data sheet must be read in conjunction

with this demo manual prior to working on or modifying

demo circuit DC2166A.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2166A

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dc2166af

DEMO MANUAL DC2166A

Quick start proceDure

Demonstration circuit DC2166A is an easy way to evalu-

ate the performance of the LTM4639EY. Please refer to

Figure 1 for proper measurement equipment setup and

follow the procedure below:

1. Place jumpers in the following positions for a typical

application:

RUN TRACK/SS MODE

VOUT

SELECT CPWR SELECT

ON SOFT-START CCM 1.0V BOOST

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 3.3V.

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

age should be 1.0V ± 1.5% (0.985V to 1.015V).

4. Vary the input voltage from 2.375V to 7V and adjust

the load current from 0A to 20A. Observe the output

voltage regulation, ripple voltage, efficiency, and other

parameters.

performance summary

PARAMETER CONDITIONS/NOTES VALUE

Input Voltage Range 2.375V to 7V

Output Voltages 1.0V, 1.2V, 1.5V, 1.8V ± 1.5%

Maximum Continuous Output Current Derating is necessary for certain operating conditions.

See data sheet for details.

20ADC

Operating Frequency 500kHz

Efficiency VIN = 3.3V, IOUT = 20A 83.2% (VOUT1 = 1.0V) (Figure 2)

85.3% (VOUT1 = 1.2V) (Figure 2)

87.7% (VOUT1 = 1.5V) (Figure 2)

89.1% (VOUT1 = 1.8V) (Figure 2)

Load Transient VIN = 3.3V, VOUT = 1.0V, ISTEP = 0A to 10A 156mV (Figure 4)

5. (Optional) For optional load transient test, apply an

adjustable pulse signal between IOSTEP_CLK and GND

test points. The pulse amplitude sets the load step cur-

rent amplitude. Keep the pulse width short (<1ms) and

pulse duty cycle low (<5%) to limit the thermal stress

on the load transient circuit.

6. (Optional) LTM4639 can be synchronized to an external

clock signal. Place the JP3 jumper on EXTCLK and apply

a clock signal (0V to 5V, square wave) on the CLKIN

test point.

7. (Optional) The outputs of LTM4639 can track another

supplybysettingJP1to EXT. TRACK. If tracking external

voltage is selected, the corresponding test point TRACK

need to be connected to a valid voltage signal.

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dc2166af

DEMO MANUAL DC2166A

Quick start proceDure

–

LOAD

–

Figure 1. Measurement Setup of DC2166A

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dc2166af

DEMO MANUAL DC2166A

Quick start proceDure

60.0

65.0

70.0

75.0

80.0

90.0

85.0

95.0

100.0

0.0 5.0 10.0 15.0 20.0

EFFICIENCY (%)

LOAD CURRENT (A)

VOUT = 1.8V

VOUT = 1.5V

VOUT = 1.2V

VOUT = 1V

60.0

65.0

70.0

75.0

80.0

85.0

90.0

95.0

0.0 5.0 10.0 15.0 20.0

EFFICIENCY (%)

LOAD CURRENT (A)

VOUT = 1.8V

VOUT = 1.5V

VOUT = 1.2V

VOUT = 1V

Figure 2. Measured Efficiency at VIN = 3.3V, fSW = 500kHz, CCM

Figure 3. Measured Efficiency at VIN = 5.0V, fSW = 500kHz, CCM

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dc2166af

DEMO MANUAL DC2166A

Quick start proceDure

VOUT: 100mV/DIV

IOUT_STEP: 13.3A/DIV

Figure 4. Measured Load Transient

VIN = 3.3V, VOUT1 = 1.0V, ISTEP = 0A to 10A

Figure 5. Thermal Image of LTM4639

VIN = 3.3V, VOUT = 1.8V, ILOAD = 20A

Ambient Temperature = 23.3°C, No Forced Air Flow

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dc2166af

DEMO MANUAL DC2166A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 2 C3, C5 CAP, 1210, 22µF, 10%, 16V, X5R MURATA GRM32ER61E226KE20L

2 1 C6 CAP, 150µF, 35V, ELEC SUN ELEC 35CE150AX

3 1 C9 CAP, 0603, 0.1µF, 10%, 50V, X7R TDK C1608X7R1H104K

4 1 C10 CAP, 0603, 180pF, 10%, 10V, X7R AVX, 0603ZC181KAT2A

5 2 C11, C13 CAP, 1210, 100µF, 20%, 6.3V, X5R TDK C3225X5R0J107M

6 1 C16 CAP, 7343, 470µF, 20%, 2.5V POSCAP PANASONIC 2R5TPE470M9

7 1 C18 CAP, 0603, 1.5nF, 5%, 25V, X7R AVX 06033C152JAT2A

8 1 R13 RES, 0603, 60.4kΩ, 1%, 1/10W VISHAY CRCW060360K4FKEA

9 1 R12 RES, 0603, 90.9kΩ, 1%, 1/10W VISHAY CRCW060390K9FKEA

10 1 R9 RES, 0603, 124kΩ, 1%, 1/10W VISHAY CRCW0603124K0FKEA

11 1 R14 RES, 0603, 40.2kΩ, 1%, 1/10W VISHAY CRCW060340K2FKEA

12 1 R15 RES, 0603, 30.1kΩ, 1%, 1/10W VISHAY CRCW060330K1FKEA

13 1 R20 RES. 0603, 100kΩ, 5%, 1/10W VISHAY CRCW0603100KJNEA

14 1 U1 IC, LTM4639EY LINEAR TECH LTM4639EY#PBF

Additional Demo Board Circuit Components

1 3 C1, C2, C8 CAP, 0603, 1µF, 20%, 10V, X5R TDK, C1608X5R1A105M

2 0 C4, C12, C22, C23 CAP, 1210 OPTION OPTION

3 0 C7 CAP, 0805 OPTION OPTION

4 0 C14 CAP, 7343 OPTION OPTION

5 0 C17, C19, C20, C21, C26 CAP, 0603 OPTION OPTION

6 1 C27 CAP, 0805, 4.7µF, 20%, 10V, X7R TDK C2012X7R1A475M

7 1 C28 CAP, 0805, 22µF, 10%, 16V, X5R TDK C2012X5R1C226K

81 C29 CAP, 0603, 470pF, 10%, 10V, X7R AVX, 0603ZC471KAT2A

9 1 D1 DIODE, SCHOTTKY 30V ON SEMI NSR0230P2T5G

10 1 L1 IND, 2.2µH, 2012 TAIYO YUDEN CBC2012T2R2M

11 1 Q1 XSTR, MOSFET, N-CHANNEL 30V VISHAY SUD50N04-8M8P-4GE3

12 2 R1, R23 RES, 0603, 10kΩ, 5%, 1/10W VISHAY CRCW060310K0JNEA

13 1 R2 RES, 2512, 0.015Ω, 1%, 1W VISHAY WSL2512R0150FEA

14 1 R3 RES, 0603, 60.4kΩ, 1%, 1/10W VISHAY CRCW060360K4FKEA

15 1 R4 RES, 0603, 90.9kΩ, 1%, 1/10W VISHAY CRCW060390K9FKEA

16 0 R5, R6, R8, R11, R22 RES, 0603 OPTION OPTION

17 4 R7, R16, R17, R21 RES, 0603, 0Ω JUMPER VISHAY CRCW06030000Z0ED

18 1 R10 RES. 0603, 20kΩ, 5%, 1/10W VISHAY CRCW060320K0JNEA

19 2 R18, R19 RES, 0603, 10Ω, 5%, 1/10W VISHAY CRCW060310R0JNEA

20 1 R24 RES, 0603, 29.4kΩ, 1% 1/10W VISHAY CRCW060329K4FKEA

21 1 U2 IC, LT1935AES5 LINEAR TECH. LT1935ES5#PBF

22 1 U3 IC, LTC2997IDCB LINEAR TECH., LTC2997IDCB#PBF

Hardware

1 12 E1-E12 TESTPOINT,TURRET,. 094" MILL-MAX 2501-2-00-80-00-00-07-0

2 2 JP1, JP2 HEADER, 1 ×3 , 2mm SULINS, NRPN031PAEN-RC

3 2 JP3, JP4 HEADER, 2 ×4, DOUBLE ROW, 2mm SULINS, NRPN042PAEN-RC

4 2 JP5 HEADER, 2 ×3, DOUBLE ROW, 2mm SULINS, NRPN032PAEN-RC

5 4 J1, J2, J5, J6 JACK, BANANA KEYSTONE 575-4

6 2 J3,J4 CONN., VERT. PC-MNT, BNC 50Ω CONNEX 112404

7 5 XJP1, XJP2, XJP3, XJP4, XJP5 SHUNT SAMTEC 2SN-BK-G

84 MH1, MH2, MH3, MH4 STANDOFF, SNAP ON KEYSTONE_8834

9 2 STENCILS TOP AND BOTTOM STENCIL DC2166A

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dc2166af

DEMO MANUAL DC2166A

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

4 4

3 3

2 2

1 1

2.375V - 7V

OFF

20A MAX

CLK

RUN

1.8V

1.2V

1.0V

1.5V

2512

MODE

CCM

PULSE SKIP

BURST

EXTCLK

OSCON

SOFTSTART

EXT. TRACK

TRACK/SS

10V

30V 200MA

LT1935ES5

CPWR SELECT

4MV / K

1608

BOOST

EXTERNAL

VIN

VOUT SELECT

VO-

VO+

VO-

VO+

INTVCC

VIN

VOUT

VIN

INTVCC

VOUT VIN

VIN

INTVCC

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

YAN L.

PRODUCTION

208/27/14

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

YAN L.

PRODUCTION

208/27/14

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

YAN L.

PRODUCTION

208/27/14

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

Thursday, August 28, 2014

LOW VIN, 20A STEP-DOWN

YAN L.

N/A

LTM4639EY

DEMO CIRCUIT 2166A

MODULE REGULATOR

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

Thursday, August 28, 2014

LOW VIN, 20A STEP-DOWN

YAN L.

N/A

LTM4639EY

DEMO CIRCUIT 2166A

MODULE REGULATOR

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

Thursday, August 28, 2014

LOW VIN, 20A STEP-DOWN

YAN L.

N/A

LTM4639EY

DEMO CIRCUIT 2166A

MODULE REGULATOR

C19

OPT

C19

OPT

1uF

10V

1uF

10V

TRACK

C17

OPT

C17

OPT R8

OPT

470uF

C16

2.5V

7343

470uF

C16

2.5V

7343

U2U2

SHDN

SW 1

GND

FB 3

VIN 5

R20

100k

R20

100k

C21

OPT

C21

OPT

R24

29.4K

R24

29.4K

GND

JP1JP1

IOSTEP

R16

VO+

1uF

10V

1uF

10V

124k

JP3JP3

C23

OPT

1210

C23

OPT

1210

10K

SUD50N04-8M8P

R19

OPT

LTM4639EY

SGND

G11

FSET

B12

VOUT_LCL

L12

COMPA

A11

VFB

F12

RUN A10

TRACK/SS A9

MODE_PLLIN A8

INTVCC

VOSNS+

J12

VOSNS-

M12

DIFF_VOUT

K12

INTVCC

VIN A1

VIN A2

VIN A3

VIN A4

VIN A5

VIN A6

VIN B1

VIN B2

VIN B3

VIN B4

VIN B5

VIN B6

VIN C1

VIN C2

VIN C3

VIN C4

VIN C5

VIN C6

VOUT J1

VOUT J2

VOUT J3

VOUT J4

VOUT J5

VOUT J6

VOUT J7

VOUT J8

VOUT J9

VOUT J10

VOUT K1

VOUT K2

VOUT K3

VOUT K4

VOUT K5

VOUT K6

VOUT K7

VOUT K8

VOUT K9

VOUT K10

VOUT K11

VOUT L1

VOUT L2

VOUT L3

VOUT L4

VOUT L5

VOUT L6

VOUT L7

VOUT L8

VOUT L9

VOUT L10

VOUT L11

VOUT M1

VOUT M2

VOUT M3

VOUT M4

VOUT M5

VOUT M6

VOUT M7

VOUT M8

VOUT M9

VOUT M10

VOUT M11

PGND

PGND H6

PGND H7

PGND H8

PGND H9

SGND

H11

SGND

H12

PGND

C9 PGND

PGND

PGOOD

F11

PGOOD

G12

MTP7 D12

MTP6 D11

MTP5 D10

MTP4 C12

MTP3 C11

MTP2 C10

MTP1 B11

EXTVCC

E12

CPWR

COMPB

A12

OT_TEST

TEMP+

TEMP-

JP2JP2

C12

OPT

1210

C12

OPT

1210

R17

OPT

GND

R11

OPT

R11

OPT

60.4K

R15

30.1K 1%

R15

30.1K 1%

C13

100uF

6.3V

1210

C13

100uF

6.3V

1210

VOUT

C11

100uF

6.3V

1210

C11

100uF

6.3V

1210

2.2uH

R23

10K

R23

10K

LTC2997IDCB

D+ 1

D- 2

VCC 4

VPTAT

VREF

GND

D1D1

0.1uF

C14

OPT

7343

C14

OPT

7343

R12

90.9K 1%

R12

90.9K 1%

C18

1.5nF

C18

1.5nF

E10

EXTVCC

E10

EXTVCC

VOUT

SGND

C22

OPT

1210

C22

OPT

1210

OPT

16V

1210

OPT

16V

1210

90.9K

VIN

R14

40.2K 1%

R14

40.2K 1%

22uF

16V

1210

22uF

16V

1210

JP5JP5

R10

20k

R10

20k

CLKIN

R22

OPT

R22

OPT

VIN

JP4JP4

0.015

C10

180pF

C10

180pF

R21

E11

PGOOD

E11

PGOOD

150uF

35V

150uF

35V

C29

470pF

C29

470pF

R18

VO-

C26

OPT

C26

OPT

IOSTEP

1uF

10V

1uF

10V

22uF

16V

1210

22uF

16V

1210

R13

60.4K 1%

R13

60.4K 1%

C27

4.7uF

0805

C27

4.7uF

0805

E12

CPWR

E12

CPWR

OPT

0805

OPT

0805

C28

22uF

0805

C28

22uF

0805

C20

OPT

C20

OPT

VTEMP

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dc2166af

DEMO MANUAL DC2166A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

 LINEAR TECHNOLOGY CORPORATION 2014

LT 1114 • 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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