Linear DC1892A Guía de configuración rápida

dc1892afb

DEMO MANUAL DC1892A

DESCRIPTION

LTM4630EV

High Efficiency, Dual 18A

Step-Down Power

µModule

Regulator

Demonstration circuit 1892A features the LT M

4630EV,

the high efficiency, high density, dual 18A, switch mode

step-down power module regulator. The input voltage is

from4.5Vto15V.Theoutputvoltageis programmable from

0.6V to 1.8V. DC1892A can deliver up to 18A maximum

in each channel. As explained in the LTM4630 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 effi-

ciency at low load currents, the MODE jumper (JP1) selects

pulse-skipping mode for noise-sensitive applications or

BurstMode

operation in less noise-sensitive applications.

Tw o outputs can be connected in parallel for a single 36A

output solution with optional jumper resistors. The board L, LT, LTC, LTM, Linear Technology, Linear logo, μModule and Burst Mode are registered

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

respective owners.

BOARD PHOTO

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 LTM4630EV in a compact 16mm × 16mm × 4.41mm

LGA package make it ideal for use in many high density

point-of-load regulation applications. The LTM4630 data

sheet must be read in conjunction with this demo manual

for working on or modifying the demo circuit DC1892A.

Design files for this circuit board are available at

http://www.linear.com/demo/DC1892A

Figure 1. DC1892A

dc1892afb

DEMO MANUAL DC1892A

QUICK START PROCEDURE

Demonstration circuit DC1892A is easy to set up to evalu-

ate the performance of the LTM4630EV. 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 JP6

MODE RUN1 RUN2 TRACK1

SEL.

TRACK2

SEL.

CLKOUT

PHASE

CCM ON ON SOFT-

START

SOFT-

START

90°

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

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

0A and the VIN supply to 12V.

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

age in channel 1 should be 1.5V± 1.5% (1.4775V~

1.5225V) and the output voltage in channel 2 should

be 1V ± 1.5% (0.985V ~ 1.015V).

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 should 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 the IOSTEP CLK and

GND test points. Pulse amplitude (3V~ 3.5V) sets the

loadstepcurrentamplitude.Theoutputtransientcurrent

can be monitored at the BNC connector J3 (15mV/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)LTM4630 can be synchronized to an external

clock signal. Place the JP1 jumper on EXT_CLK and

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

test point.

7. (Optional) The outputs of LTM4630 can track another

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) LTM4630 can be configured for a 2-phase

single output at up to 36A on DC1892A. Install 0Ω

resistors on R14, R17, R28, R39 and remove R7, R19.

Output voltage is set by R25 based on the equation:

VOUT =0.6V • 1+60.4k

R25











PERFORMANCE SUMMARY

Specifications are at TA= 25°C

PARAMETER CONDITIONS/NOTES VALUE

Input Voltage Range 4.5V ~ 15V

Output Voltage VOUT1 VIN = 4.5 ~ 15V, IOUT1 = 0A ~ 18A, JP1: CCM 1.5V ± 1.5% (1.4775V ~ 1.5225V)

Output Voltage VOUT2 VIN = 4.5 ~ 15V, IOUT2 = 0A ~ 18A, JP1: CCM 1V ± 1.5% (0.985V ~ 1.015V)

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

Conditions. See the LTM4630 Data Sheet for Details

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 = 5V, VOUT1 = 1.5V, IOUT1 = 18A, fSW = 500kHz 89.7%, See Figure 3

Efficiency of Channel 2 VIN = 5V, VOUT2 = 1V, IOUT2 = 18A, fSW = 500kHz 84.8%, See Figure 4

Load Transient of Channel 1 VIN = 12V, VOUT1 = 1.5V, ISETP = 9 ~ 18A See Figure 5

Load Transient of Channel 2 VIN = 12V, VOUT2 = 1V, ISETP = 9 ~ 18A See Figure 6

dc1892afb

DEMO MANUAL DC1892A

QUICK START PROCEDURE

+–

–

+–

LOAD

(0A TO 18A)

LOAD

(0A TO 18A)

VIN

4.5V TO 15V

+–

VOUT1

–VOUT1

Figure 2. Test Setup of the DC1892A

dc1892afb

DEMO MANUAL DC1892A

Figure 3. Measured Efficiency on Channel 1. VOUT1 = 1.5V,

fSW = 500kHz, Channel 2 Disabled, CCM, 0A to 18A

QUICK START PROCEDURE

Figure 4. Measured Efficiency on Channel 2. VOUT2 = 1V,

fSW = 500kHz, Channel 1 Disabled, CCM, 0A to 18A

LOAD CURRENT (A)

EFFICIENCY (%)

10 12 14 16 182 4 6

dc1892a F03

VIN = 12V

VIN = 5V

LOAD CURRENT (A)

EFFICIENCY (%)

10 12 14 16 182 4 6

dc1892a F04

VIN = 12V

VIN = 5V

dc1892afb

DEMO MANUAL DC1892A

QUICK START PROCEDURE

Figure 5. Measured Channel 1, 9A to 18A Load Transient

(VIN = 12V, VOUT1 = 1.5V)

Figure 6. Measured Channel 2, 9A to 18A Load Transient

(VIN = 12V, VOUT2 = 1V)

9A to 18A LOAD STEP

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

9A to 18A LOAD STEP

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

dc1892afb

DEMO MANUAL DC1892A

Figure 7. Thermal Capture at 12VIN, 1.5VOUT1 at 18A and

1VOUT2 at 18A (TA= 25°C, 200 LFM Airflow and No Heat Sink)

QUICK START PROCEDURE

dc1892afb

DEMO MANUAL DC1892A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 4 CIN2, CIN3, CIN4, CIN5 CAP., X5R, 22µF, 25V, 10%,1210 MURATA, GRM32ER61E226KE15

2 2 COUT1, COUT7, COUT9, COUT10 CAP., 470µF, 4V, POSCAP, F8 SANYO, 4TPE470MCL

3 2 COUT4, COUT5 CAP., X5R, 100µF, 6.3V, 20%, 1210 AVX, 12106D107MAT2A

4 2 R22, R26 RES., CHIP, 10, 1%, 0603 VISHAY, CRCW060310R0FKEA

5 1 R19 RES., CHIP, 90.9k, 1%, 0603 VISHAY, CRCW060390K0FKEA

6 1 R25 RES., CHIP, 40.2k, 1%, 0603 VISHAY,CRCW060340K2FKEA

7 1 R5, R30 RES., CHIP, 121k, 1%, 0603 VISHAY,CRCW0603121KFKEA

8 1 U1 LTM4630EV, 16×16×4.41-LGA LINEAR TECHNOLOGY, LTM4630EV

Additional Demo Board Circuit Components

9 1 CIN1 CAP., 150µF, 25V, ALUMINUM ELECTR., SUN ELECT., 25CE150AX

10 0 COUT2, COUT3, COUT6, COUT8 OPT, 1210

11 1 C1 CAP., X5R, 4.7µF, 25V,10%, 0805 AVX, 08053D475KAT2A

12 1 C2 CAP., X7R, 1µF, 25V,10%, 0805 AVX, 08053C105KAT2A

13 2 C5, C7 CAP., X5R, 0.1µF, 25V, 10%, 0603 AVX, 06033D104KAT

14 0 C3, C4, C6, C8-C12 OPT, 0603

15 2 C13, C14 CAP., X7R, 0.01µF, 50V, 10%, 0603 AVX, 06035C103KAT2A

16 2 C15, C16 CAP., X7R, 1µF, 10V, 10%, 0603 AVX, 0603ZC105KAT2A

17 1 Q1 N-CHANNEL 30V MOSFET VISHAY, SUD50N03-09P

18 2 R1, R3, RES., CHIP, 10, 1%, 0603 VISHAY, CRCW060310R0FKEA

19 0 R2, R4, R6, R8, R11, R14, R16, R17, R20,

R23, R28, R31, R33, R39, R40

OPT, 0603

20 4 R24, R27, R36 RES., CHIP, 10k, 1%, 0603 VISHAY, CRCW060310K0FKED

21 4 R7, R21, R29, R32 RES., CHIP, 0, 1%, 0603 VISHAY, CRCW06030000Z0ED

22 5 R9, R12, R15, R18 RES., CHIP, 60.4k, 1%, 0603 VISHAY, CRCW060360K4FKED

23 2 R10, R13 RES., CHIP, 6.04k, 1%, 0603 VISHAY, CRCW06036K04FKED

24 1 R34 RES., CHIP, 0Ω, 0.5W, 2010 VISHAY, CRCW20100000Z0EF

25 0 R35 OPT, 2010

26 1 R37 RES., CHIP, 0.015Ω, 2W, 2512 VISHAY, WSL2512R0150FEA

27 0 R38 OPT, 2512

Hardware: For Demo Board Only

28 16 E1, E3-E10, E12-E16 TESTPOINT, TURRET, 0.094" PBF MILL-MAX, 2501-2-00-80-00-00-07-0

29 3 J1, J2, J3 CONN, BNC, 5 PINS CONNEX 112404

30 6 J4-J9 JACK BANANA KEYSTONE, 575-4

31 1 JP1 HEADER, 4-PIN, 0.079", DOUBLE ROW SAMTEC, TMM104-02-L-D

32 1 JP6 HEADER, 4-PIN, 0.079", SINGLE ROW SAMTEC, TMM104-02-L-S

33 3 JP2, JP3, JP4 HEADER, 3-PIN, 0.079", SINGLE ROW SAMTEC, TMM103-02-L-S

34 1 JP5 HEADER, 3-PIN, 0.079", DOUBLE ROW SAMTEC, TMM-103-02-L-D

35 6 XJP1-XJP6 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G

36 4 (STAND-OFF) STAND-OFF, NYLON, 0.50" KEYSTONE, 8833 (SNAP-ON)

dc1892afb

DEMO MANUAL DC1892A

D D

C C

B B

A A

VIN+

VIN-

VIN

GND

4.5V - 15V

VOUT1

GND

VO1+

VO1-

1.5V / 18A

1.0V / 18A

GND

VO2-

VO2+

VOUT2

TRACK1

CLKOUT

PHASE

120

EXT.

SOFT-START

TRACK1 SEL.

NOTE: UNLESS OTHERWISE SPECIFIED

1. ALL RESISTORS ARE IN OHMS, 0603.

ALL CAPACITORS ARE 0603.

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

INTVCC

TEMP

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

HAORAN W.PRODUCTION1 01-21-15

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

HAORAN W.PRODUCTION1 01-21-15

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

HAORAN W.PRODUCTION1 01-21-15

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

Wednesday, January 21, 2015

HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR

HAORAN W.

N/A

LTM4630EV

DEMO CIRCUIT 1892A

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

Wednesday, January 21, 2015

HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR

HAORAN W.

N/A

LTM4630EV

DEMO CIRCUIT 1892A

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

Wednesday, January 21, 2015

HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR

HAORAN W.

N/A

LTM4630EV

DEMO CIRCUIT 1892A

E15

TEMP

E15

TEMP

JP3

OFF

RUN2

JP3

OFF

RUN2

J7J7

R16

OPT

R16

OPT

J6J6

E4E4

C10

OPT

C10

OPT

COUT3

OPT

1210

COUT3

OPT

1210

E7E7

COUT6

OPT

1210

COUT6

OPT

1210

COUT2

OPT

1210

COUT2

OPT

1210

CIN4

22uF

1210

25V

CIN4

22uF

1210

25V

E1E1

J4J4

0.1uF

R19

90.9K

R19

90.9K

LTM4630EV

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

VOUTS1

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

VOUTS2 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

J8J8

R30

121K

R30

121K

J5J5

JP1

EXT_CLK

CCM

MODE

JP1

EXT_CLK

CCM

MODE

7 8

R10

6.04K

R10

6.04K

OPT

OPT C4

OPT

COUT1

470uF

COUT1

470uF

E12 PGOOD2

0.1uF

COUT10

470uF

COUT10

470uF

R32

R15

60.4K

R15

60.4K

CIN3

22uF

25V

1210

CIN3

22uF

25V

1210

E13

EXTVCC

E13

EXTVCC

OPT

R22

4.7uF

0805

4.7uF

0805

COUT8

OPT

1210

COUT8

OPT

1210

E14

CLKOUT

E14

CLKOUT

COUT4

100uF

6.3V

1210

COUT4

100uF

6.3V

1210

R21

CIN2

22uF

25V

1210

CIN2

22uF

25V

1210

E6E6

E8E8

R20

OPT

R20

OPT

1uF

0805

1uF

0805

J9J9

CIN5

22uF

25V

1210

CIN5

22uF

25V

1210

COUT7

470uF

COUT7

470uF

R27

10K

R27

10K

JP5

TRACK2 SEL.

VOUT1

JP5

TRACK2 SEL.

VOUT1

5 6

C12

OPT

C12

OPT

R24

10K

R24

10K

OPT

JP6JP6

C11

OPT

C11

OPT

121K

JP2

OFF

RUN1

JP2

OFF

RUN1

1 3

E10 TRACK2

R18

60.4K

R18

60.4K

E9E9

CIN1

150uF

25V

CIN1

150uF

25V

COUT9

470uF

COUT9

470uF

60.4K

JP4

SOFT-START

TRACK

JP4

SOFT-START

TRACK

R26

OPT

PGOOD1

OPT

R12

60.4K

R12

60.4K

TP1

SW1

TP1

SW1

R13

6.04K

R13

6.04K

COUT5

100uF

6.3V

1210

COUT5

100uF

6.3V

1210

E5E5

TP2 SW2

R29

E16

CLKIN

E16

CLKIN

OPT

R25

40.2K

R25

40.2K

SCHEMATIC DIAGRAM

dc1892afb

DEMO MANUAL DC1892A

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.

D D

C C

B B

A A

OPTIONAL JUMPER FOR 1 OUTPUT CONFIGURATION

DIFF SENSING SELECTION

VOUT1

LOAD TRANSIENT CIRCUIT

VOUT2

TEMP INTVCC

RUN1 RUN2

TRACK1 TRACK2

VFB1 VFB2

COMP1 COMP2

VO2- DIFFN

VO2+ DIFFP

VOUT1S VOUT1

VOUT2S DIFFOUT

VOUT1 VOUT2

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

Wednesday, January 21, 2015

HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR

HAORAN W.

N/A

LTM4630EV

DEMO CIRCUIT 1892A

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

Wednesday, January 21, 2015

HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR

HAORAN W.

N/A

LTM4630EV

DEMO CIRCUIT 1892A

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

Wednesday, January 21, 2015

HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR

HAORAN W.

N/A

LTM4630EV

DEMO CIRCUIT 1892A

E17

IOSTEP CLK

E17

IOSTEP CLK

R36

10K

R36

10K

R39

OPT

R39

OPT

R23

OPT

R23

OPT

IOSTEP

SUD50N03-09P

R35

OPT

2010

R35

OPT

2010

C13

0.01uF

C13

0.01uF

R14

OPT

R14

OPT

J1J1

R11

OPT

R11

OPT

C14

0.01uF

C14

0.01uF

E18

GND

E18

GND

R34

0 OHm

0.5W

2010

R34

0 OHm

0.5W

2010

R28

OPT

R28

OPT

R38

OPT

2512

R38

OPT

2512

R33

OPT

R33

OPT

R40

OPT

R40

OPT

C16

1uF

C16

1uF

R17

OPT

R17

OPT

R37

0.015

2512

R37

0.015

2512

J2J2

R31

OPT

R31

OPT

C15

1uF

C15

1uF

SCHEMATIC DIAGRAM

dc1892afb

DEMO MANUAL DC1892A

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 0115 REV B • 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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