Linear Technology DC2603A-A Quick setup guide

dc2603aaf

DEMO MANUAL DC2603A-A

DESCRIPTION

LTM4650AEY

Dual 25A or Single 50A

DC/DC μModule Regulator

Demonstration circuit 2603A-A features the

LT M ®4650AEY-1, the high efficiency, high density, dual

25A, single 50A switch mode step-down power mod-

ule regulator. The input voltage is from 4.5V to 16V.

The output voltage is programmable from 0.6V to 5.5V.

DC2603A-A can deliver 25A maximum current from each

channel. The board designs with minimum components to

demonstrate this high efficiency, high density µModule®.

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 MODE jumper (JP1) selects pulse-skipping

mode for noise sensitive applications or Burst Mode

operation in less noise sensitive applications. Two out-

puts can be connected in parallel for a single 50A out-

L, LT, LTC, LTM, BUrst Mode, µModule, Linear Technology and the Linear logo are registered

trademarks of Analog Devices, Inc. All other trademarks are the property of their respective

owners.

BOARD PHOTO

put solution with optional jumper resistors. The board

allows the user to program how its output ramps up and

down through the TRACK/SS pin. The output can be set

up to either coincidentally or ratiometrically track with

another supply’s output. Remote output voltage sens-

ing is available for improved output voltage regulation at

the load point. These features and the availability of the

LTM4650AEY in a compact 16mm ×16mm ×5.01mm

BGA package make it ideal for use in many high-density

point-of-load applications. The LTM4650Adata sheet

must be read in conjunction with this demo manual for

working on or modifying the demo circuit DC2603A-A.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2603A-A

Figure 1. LTM4650A/DC2603A-A Demo Board

dc2603aaf

DEMO MANUAL DC2603A-A

QUICK START PROCEDURE

Demonstration circuit DC2603A-A is easy to set up to

evaluate the performance of the LTM4650AEY. Please

refer to Figure 2 for proper measurement setup and

follow the procedure below:

1. Place jumpers in the following positions for a typical

application:

JP1 JP2 JP3 JP4 JP5

MODE RUN1 RUN2 TRACK1 SEL TRACK2 SEL

CCM ON ON SOFT-START SOFT-START

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

and meters as shown in Figure 2. Preset the load to 0A

and VIN supply to 12V.

3. Turnonthepowersupplyattheinput.Theoutputvoltage

in channel 1 should be 1.5V± 1.0% (0.985V~1.015V)

andtheoutputvoltageinchannel2shouldbe3.3V±1.0%

(3.267V~3.333V)

4. Oncethe proper output voltage is established, adjustthe

load within the operating range and observe the output

voltage regulation, output voltage ripple, efﬁciency and

other parameters. Output ripple can be measured at J1

and J2 with BNC cables.50Ω termination should be set

on the oscilloscope or BNC cables.

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

adjustable pulse signal between “IOSTEP CLK” and

“GND” test point. Pulse amplitude (3V~3.5V) sets the

loadstepcurrentamplitude.Theoutputtransientcurrent

can be monitored at the BNC connector J3 (10mV/A).

The pulse signal should have very small duty cycle

(< 10%) to limit the thermal stress on the transient

load circuit. Switch the jumper resistors R34 or R35

(on the backside of boards) to apply load transient on

channel 1 or channel 2 correspondingly.

6. (Optional) LTM4650A can be synchronized to an

external clock signal. Place the JP1 jumper on EXT_CLK

and apply a clock signal (0V~5V, square wave) on the

CLKIN test point.

7. (Optional)TheoutputsofLTM4650A-1cantrackanother

supply. The jumpers JP4 and JP5 allow choosing soft-

start or output tracking. If tracking external voltage is

selected, the corresponding test points, TRACK1 and

TRACK2, need to be connected to a valid voltage signal.

8. (Optional)LTM4650A-1canbeconﬁgured for a2-phase

singleoutputatupto50AonDC2603A-A.Install0Ωresis-

tors on R14, R17, R28, R39, R43, R44, R45 and remove

R7,R19. Output voltage is set byR25based onequation:

VOUT =0.6V • 1+60.4k

R25

⎛

⎝

⎜⎞

⎠

⎟

PERFORMANCE SUMMARY

Specifications are at TA= 25°C

PARAMETER CONDITIONS VALUE

Input Voltage Range 4.5V ~ 16V

Output Voltage VOUT1 VIN = 4.5~16V, IOUT1 = 0~25A, JP1: CCM 1.5V ± 1% (1.485V ~ 1.515V)

Output Voltage VOUT2 VIN = 4.5~16V, IOUT1 = 0~25A, JP1: CCM 3.3V ± 1% (3.267V ~ 3.333V)

Per- Channel Maximum Continuous Output

Current

De-rating is Necessary for Certain VIN, VOUT and Thermal

Conditions, see Data Sheet for Detail

25A

Default Operating Frequency 600kHz

Resistor Programmable Frequency Range 250kHz to 780kHz

External Clock Sync. Frequency Range 400kHz to 780kHz

Efficiency of Channel 1 VIN = 12V, VOUT = 1.5V, IOUT = 25A, fSW = 600 kHz 90.4%, See Figure 3

Efficiency of Channel 2 VIN = 12V, VOUT = 3.3V, IOUT = 25A, fSW = 600 kHz 94.2%, See Figure 4

Load Transient of Channel 1 VIN = 12V, VOUT = 1.5V, ISTEP = 12.5~18.75A < ±3% (90mVP-P), See Figure 5

Load Transient of Channel 2 VIN = 12V, VOUT = 3.3V, ISTEP = 12.5~18.75A < ±3% (198mVP-P), See Figure 6

dc2603aaf

DEMO MANUAL DC2603A-A

QUICK START PROCEDURE

Figure 2. Test Setup of DC2603A-A

LOAD1 (0~25A)

dc2603aaf

1mΩ

VOUT1

VIN

4.5V-16V

VOUT2

–+–

LOAD2 (0~25A)

1mΩ

+ –+

–

+ –

+ –+

–

dc2603aaf

DEMO MANUAL DC2603A-A

84.6

91.5

94.4 94.7 94.7 94.2

94.9

96.7 97.1 96.5 95.9

95.2

100

0 5 10 15 20 25

EFFICIENCY (%)

OUTPUT LOAD CURRENT (A)

VIN=12V VIN=5V

QUICK START PROCEDURE

Figure 3. Measured Efficiency on Channel 1 (VOUT1 = 1.5V, fSW = 600kHz, Channel2 Disabled)

Efficiency vs Load Current at VO = 3.3V, fSW = 600kHz

Efficiency vs Load Current at VO = 1.5V, fSW = 600kHz

Figure 4. Measured Efficiency on Channel 2 (VOUT2 = 3.3V, fSW = 600kHz, Channel1 Disabled)

83.4

88.9

91.8 91.6 90.9 90.4

90.3

93.0

94.0

93.1

92.2

90.7

100

0 5 10 15 20 25

EFFICIENCY (%)

OUTPUT LOAD CURRENT (A)

VIN=12V VIN=5V

dc2603aaf

DEMO MANUAL DC2603A-A

QUICK START PROCEDURE

Figure 5. Measured Channel 1 12.5A-18.75A Load Transient (VIN = 12V, VOUT1 = 1.5V)

Figure 6. Measured Channel 2 12.5A-18.75A Load Transient (VIN = 12V, VOUT2 = 3.3V)

3.3V Output (20MHz BW) [50mV/Div]

12.5A-18.75A Load Step

1.5V Output (20MHz BW) [20mV/Div]

12.5A-18.75A Load Step

dc2603aaf

DEMO MANUAL DC2603A-A

QUICK START PROCEDURE

Figure 7. Measured Output Voltage Ripple at 12V Voltage Input, 1.5V/25A, fSW = 600kHz, Measured Across COUT6 Using 1×Probe

Figure 8. Measured Output Voltage Ripple at 12V Voltage Input, 3.3V/25A, fSW = 600kHz, Measured Across COUT2 Using 1×Probe

dc2603aaf

DEMO MANUAL DC2603A-A

QUICK START PROCEDURE

Figure 9. Thermal Performance at VIN = 12V, VOUT1 = 1.5V/25A, VOUT2 = 3.3V/25A, fSW = 600kHz, TA= 23 °C, No Forced Air Airflow

dc2603aaf

DEMO MANUAL DC2603A-A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 CIN1 CAP., 330µF, ALUM, OS-CON, 25V, 20%, SMD

10mm ×12.6mm, F12, SVPF Series

PANASONIC, 25SVPF330M

2 4 CIN2,CIN3,CIN4,CIN5 CAP., 22µF, X5R, 25V, 10%,1210 MURATA, GRM32ER61E226KE15L

3 6 COUT2, COUT6, COUT13,

COUT14, COUT15, COUT16

CAP., 100µF, X5R, 6.3V, 20%, 1210 AVX, 12106D107MAT2A

4 4 COUT3, COUT4, COUT5, COUT8 CAP., 100µF, X5R, 6.3V, 20%, 1210 AVX, 12106D107MAT2A

5 4 COUT9, COUT10, COUT12,

COUT18

CAP., 330µF, TANT, POSCAP, 6.3V, 20%, 7343,

D3L, TPE Series

PANASONIC, 6TPE330ML

6 1 C1 CAP., 4.7µF, X5R, 16V, 20%, 0805 KEMET, C0805C475M4PACTU

7 1 C2 CAP., 1µF, X7R, 25V,10%, 0805 AVX, 08053C105KAT2A

8 2 C5,C7 CAP., 0.1µF, X5R, 25V, 10%, 0603 AVX, 06033D104KAT2A

9 4 C13, C14, C15, C16 CAP., 1µF, X7R, 10V,10%, 0603 AVX, 0603ZC105KAT2A

10 4 R1, R3, R22, R26 RES., 10Ω, 1/10W, 1%, 0603 VISHAY, CRCW060310R0FKEA

11 1 R5 RES., 100k, 1/10W, 1%, 0603 VISHAY, CRCW0603100KFKEA

12 4 R9, R12, R15, R18 RES.., 60.4k, 1/10W, 1%, 0603 VISHAY, CRCW060360K4FKEA

13 2 R10, R13 RES.., 6.04k, 1/10W, 1%, 0603 VISHAY, CRCW06036K04FKEA

14 1 R19 RES., 13.3k, 1/10W, 1%, 0603 VISHAY, CRCW060313K3FKEA

15 3 R24, R27, R36 RES., 10k, 1/10W, 1%, 0603 VISHAY, CRCW060310K0FKEA

16 1 R25 RES., 40.2k, 1/10W, 1%, 0603 VISHAY, CRCW060340K2FKDA

17 1 R30 RES., 147k, 1/10W, 1%, 0603 VISHAY, CRCW0603147KFKEA

18 1 R37 RES., HIGH POWER, 0.01Ω, 2W, 1%, 2512 VISHAY, WSL2512R0100FEA18

19 1 U1 I.C., 16 ×16 ×5.01 BGA Linear Tech, LTM4650AEY#PBF

Additional Demo Board Circuit Components

1 0 COUT1, COUT7, COUT11,

COUT17

CAP., OPT, 7343 OPT

2 0 C3, C4, C8, C11 CAP., OPTION, 0603 OPT

3 0 C6, C9, C10, C12, C17, C18 CAP., OPT, 0603 OPT

4 0 R2, R4, R6, R8, R11, R14, R16,

R17, R20, R23, R28, R31, R33,

R39, R40, R41, R42, R46, R47,

R48

RES., OPTION, 0603 OPT

5 4 R7, R21, R29, R32 RES., 0Ω, 1/10W, 0603 VISHAY, CRCW06030000Z0EA

6 1 R34 RES., 0Ω, 3/4W, 2010 VISHAY, CRCW20100000Z0EF

7 0 R35 RES., OPTION, 2010 OPT

dc2603aaf

DEMO MANUAL DC2603A-A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

8 0 R38, R43, R44, R45 RES., OPTION, 2512 OPT

Hardware: For Demo Board Only

1 16 E1, E3, E4, E5, E6, E7, E8, E9,

E10, E12, E13, E14, E15, E16,

E17, E18

TEST POINT, TURRET, .094" MTG. HOLE MILL-MAX, 2501-2-00-80-00-00-07-0

2 1 JP1 CONN., HDR, MALE, 2 ×4, 2mm, THT, STR WURTH ELEKTRONIK, 62000821121

3 3 JP2, JP3, JP4 CONN., HDR, MALE, 1 ×3, 2mm, THT, STR WURTH ELEKTRONIK, 62000311121

4 1 JP5 CONN., HDR, MALE, 2 ×3, 2mm, THT, STR WURTH ELEKTRONIK, 62000621121

5 5 XJP1, XJP2, XJP3, XJP4, XJP5 CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421

6 3 J1, J2, J3 CONN., RF, BNC, RCPT, THT, STR, 5-PIN AMPHENOL CONNEX 112404

7 2 J4, J5 CONN., BANANA JACK, FEMALE, THT,

NON-INSULATED, SWAGE, 0.218"

KEYSTONE, 575-4

8 4 J6, J7, J8, J9 STUD, FASTENER, #10-32 PennEngineering, KFH-032-10ET

9 8 J6, J7, J8, J9 (×2) NUT, HEX, STEEL, ZINC PLATE,10-32 KEYSTONE, 4705

10 4 J6, J7, J8, J9 RING, LUG, CRIMP, #10, NON-INSULATED,

SOLDERLESS TERMINALS

KEYSTONE, 8205

11 4 J6, J7, J8, J9 WASHER, FLAT, STEEL, ZINC PLATE, OD: 0.436

[11.1]

KEYSTONE, 4703

12 4 (STAND-OFF) STANDOFF, NYLON, SNAP-ON, 0.500" KEYSTONE, 8833

dc2603aaf

DEMO MANUAL DC2603A-A

SCHEMATIC DIAGRAM

D D

C C

B B

A A

VIN+

VIN-

VIN

GND

4.5V-20V

VO1+

VO1-

VO2-

VO2+

TRACK1

EXT.

SOFT-START

TRACK1 SEL.

NOTE: UNLESS OTHERWISE SPECIFIED

1. ALL RESISTORS AND CAPACITORS ARE 0603.

SW2

SW1

U1ASSY

LTM4650AEY‐A

‐B

C10

OPT

220pF

R46,R47

OPT

10KLTM4650AEY‐1

C12

OPT

47pF

C17

OPT

3.3nF

C18

OPT

4.7nF

C6,C9

OPT

33pF

COUT9,10,12,18

330uF(7343)

OPT

COUT2,6,13,14,15,16

100uF(1210)

330uF(1210)

VOUT1

VIN INTVCC

VO1+

VO1-

INTVCC

VO1-

VO1+

INTVCC

VOUT1

VO2+

VO2-

VIN

INTVCC

DIFFP

COMP1

VFB1

DIFFN

DIFFOUT

VOUT1S

VOUT1

TRACK1

RUN1

VO2+

VOUT2

VO2-

VOUT2S

RUN2

TRACK2

VFB2

COMP2

INTVCCTEMP

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

PROTOTYPE

1 03-28-17

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

PROTOTYPE

1 03-28-17

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

PROTOTYPE

1 03-28-17

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

Tuesday, March 28, 2017

DC/DC MODULE REGULATOR

N/A

LTM4650AEY / LTM4650AEY-1

DEMO CIRCUIT 2603A(A,B)

HIGH EFFICIENCY, DUAL 25A OR SINGLE 50A,

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

Tuesday, March 28, 2017

DC/DC MODULE REGULATOR

N/A

LTM4650AEY / LTM4650AEY-1

DEMO CIRCUIT 2603A(A,B)

HIGH EFFICIENCY, DUAL 25A OR SINGLE 50A,

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

Tuesday, March 28, 2017

DC/DC MODULE REGULATOR

N/A

LTM4650AEY / LTM4650AEY-1

DEMO CIRCUIT 2603A(A,B)

HIGH EFFICIENCY, DUAL 25A OR SINGLE 50A,

E15

TEMP

JP3

OFF

RUN2

R16

OPT

COUT14 *

6.3V

1210

C10*

COUT13 *

6.3V

COUT6*

6.3V

1210

COUT2 *

6.3V

CIN4

22uF

1210

25V

0.1uF

R19

13.3K

U1 *

VIN J9

VIN J10

VIN J11

VIN K2

VIN K3

VIN K4

VIN K9

VIN K10

VIN K11

VIN

M10

VIN

M11

VIN L2

VIN L3

VIN L4

VIN L5

VIN L6

VIN L7

VIN L8

VIN L9

VIN

L10

VIN

L11

VIN J2

VIN J3

VIN J4

RUN1

TRACK1

VOUT1S

VOUT1

VFB1

SW1

PGOOD1

COMP1

DIFFOUT

DIFFN

DIFFP

FSET

PHASMD

GND

D10

GND

D11

GND

D12

GND

E10

GND

E11

GND

E12

GND

F10

GND

F11

GND

F12

GND

G10

GND

G12

GND

GND H3

GND H4

GND H5

GND H6

GND H7

GND H9

GND H10

GND H11

GND H12

GND J1

GND J5

GND J8

GND J12

GND K1

GND K5

GND K6

GND K7

GND K8

GND K12

GND L1

GND L12

GND M1

GND M12

SGND C7

SGND D6

SGND F6

SGND F7

SGND G6

SGND G7

VOUT1

COMP2 E7

PGOOD2 G8

SW2 G11

VFB2 D7

TRACK2 D8

RUN2 F9

VOUT2S C8

TEMP J6

MODE-PLLIN F4

CLKOUT G5

INTVCC H8

EXTVCC J7

VOUT2 A8

VOUT2 A9

VOUT2 A10

VOUT2 A11

VOUT2 A12

VOUT2 B8

VOUT2 B9

VOUT2 B10

VOUT2 B11

VOUT2 B12

VOUT2 C9

VOUT2 C10

VOUT2 C11

VOUT2 C12

GND

R30

147K

1.5V / 25A

VOUT1

JP1

EXT_CLK

CCM

MODE

7 8

R10

6.04K

OPT C4

OPT

COUT1

OPT

6.3V

E12 PGOOD2

R46 *

0.1uF

JP5

VOUT1

TRACK2 SEL.

5 6

R32

R15

60.4K

CIN3

22uF

25V

1210

E13

EXTVCC

COUT10 *

6.3V

7343

COUT18

6.3V

7343

COUT17

OPT

7343

COUT16 *

6.3V

COUT15 *

6.3V

1210

R22

4.7uF

E14

CLKOUT

COUT4

100uF

6.3V

1210

R21

CIN2

22uF

25V

1210

R42

OPT

R20

OPT

R47*

1uF

CIN5

22uF

25V

1210

COUT7

OPT

7343

R27

10K

GND

C12*

R24

10K

R41

OPT

COUT8

100uF

6.3V

C11

OPT

100K

JP2

OFF

RUN1

1 3

COUT12 *

6.3V

7343

E10

TRACK2

R18

60.4K

C17 *

CIN1

330uF

25V

60.4K

JP4

SOFT-START

TRACK

COUT11

OPT

6.3V

7343

R26

C9 *

PGOOD1

OPT

R12

60.4K

GND

C18*

R13

6.04K

COUT5

100uF

6.3V

1210

R29

E16

CLKIN

OPT

COUT9

6.3V

7343

COUT3

100uF

6.3V

1210

R25

40.2K

3.3V / 25A

VOUT2

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