Linear Technology LTM4650EY-1 Demo Manual

Description

DEMO MANUAL DC2455A-A

LTM4650EY-1

High Efficiency, PolyPhase 100A Step-Down

Power µModule

®

Regulator

2× LTM4650EY-1, 100A

Demonstration Circuit 2455A-A features PolyPhase® design

®

using the LT M high density, dual 25A, switch mode step-down power module regulator. The input voltage is from 4.5V to 15V. The output voltage is jumper selectable from 0.9V to 1.8V. DC2455A-A can deliver nominal 100A output current. As explained in the data sheet, output current de-rating is necessary for certain V LTM4650-1 on DC2455A-A always operate in continuous conduction mode. The switching frequency can be pro grammed through a resistor or can be synchronized to an external clock signal. The board allows the user to program how its output voltage ramps up and down through the

4650EY-1 (B-grade), the high efficiency,

, V

IN

, and thermal conditions. The

OUT

-

TRACK pin. The output voltage is tightly regulated between

+

” and “V

“V

O

which improves output voltage regulation at heavy loads. These features and the availability of the LTM4650EY-1 in a compact 16mm × 16mm × 5.01mm BGA package make it ideal for use in many high-density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2455A-A.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2455A-A

L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, PolyPhase and TimerBlox are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

–

” through remote output voltage sensing

O

Figure 1. 2× LTM4650-1, 100A PolyPhase LTM4650-1/DC2455A-A Demo Board

dc2455aaf

1

DEMO MANUAL DC2455A-A

performance summary

PARAMETER CONDITIONS / NOTES VALUE

Input Voltage Range 4.5V ~ 15V

Output Voltage V

Maximum Continuous Output Current De-rating is necessary for certain V

Default Operating Frequency 500kHz

Resistor Programmable Frequency Range 400kHz – 780kHz

External Clock Sync. Frequency Range 400kHz – 780kHz

Efficiency V

Load Transient V

OUT

VIN = 4.5V to 15V, I

conditions, see data sheet for detail.

= 12V, V

IN

= 12V, V

IN

Specifications are at TA = 25°C

= 0A to 100A, JP5: 1.0V 1.0V ± 1.5% (0.985V ~ 1.015V)

OUT

, V

and thermal

IN

OUT

= 1.0V, I

OUT

= 1.0V, I

OUT

= 100A, fSW = 500kHz 86.5% See Figure 3

OUT

= 50A to 75A < 57mV, See Figure 4

STEP

100A

Quick start proceDure

Demonstration circuit DC2455A-A is easy to set up to evaluate the performance of PolyPhase operation of the LTM4650EY-1. Due to the high input/output current, user should select the proper input supply/load/cable which can sustain the full load operation. It’s recommended to pull load current from J2 and J4. The load current pulled from J5 and J6 shouldn’t exceed 25A. Please refer to Figure 2 for proper measurement setup and follow the procedure below:

1. Place jumpers in the following positions for a typical

1.0V

application:

OUT

JP1 JP2 JP4~JP8

CLK RUN V

INT OFF ON JP5 / 1.0V

OUT

SELECT

and other parameters. Output voltage ripple should be measured at J11 with BNC cables. 50Ω termination should be set on the oscilloscope or BNC cables.

5. (Optional) For optional load transient test, apply an ad justable pulse signal between “IOSTEP CLK” and “GND test point. Pulse amplitude (3V~3.5V) sets the load step current amplitude. The output transient current can be monitored at the BNC connector J12 (5mV/A). The pulse signal should be very small duty cycle (< 10%) to limit the thermal stress on the transient load circuit.

6. (Optional) LTM4650-1 can be synchronized to an external clock signal. Place the JP1 jumper on EXT and apply a clock signal (0V~5V, square wave) on the “EXT_CLK” test point.

”

2. With power off, connect the input power supply, load and meters as shown in Figure 2. Preset the load to 0A and V

supply to 12V.

IN

3. Turn on the power supply at the input. Place JP2 to ON position. The output voltage between “V should be 1.0V ± 1.5% (0.985V~1.015V).

4. Once the proper output voltage is established, adjust the load within the operating range and observe the output voltage regulation, output voltage ripple, efficiency

2

+

” and “V

O

7. (Optional) The outputs of LTM4650-1 can track another supply. The output voltage tracks the voltage on TRACK when a valid signal is applied on the test point.

8. (Optional) DC2455A-A can be configured to a dual outputs configuration with V

at 25A load current. Stuff 0Ω resistor on R61 and

–

”

O

V

O2

0.1µF on C14. Remove R22, R23, R24, R26, R27, R28, R32, R33, R35. Output voltage V on the equation V

= 0.6V(1 + 60.4k/R37).

O2

at 75A load current and

O

is set by R37 based

O2

dc2455aaf

Quick start proceDure

DEMO MANUAL DC2455A-A

+

–

LOAD

1mΩ

0A~100A

V

OUT0

+

–

+

–

4.5V TO 16V

+

–

V

IN

+

Figure 2. Test Setup of DC2455A-A

100

95

90

85

EFFICIENCY (%)

80

75

70

0

VO = 1V

= 1.8V

V

O

4020 60

LOAD CURRENT (A)

–

1003010 50 70 9080

DC2455AA F03

Figure 3. Measured Efficiency V

= 12V, fSW = 500kHz

IN

dc2455aaf

3

DEMO MANUAL DC2455A-A

X-AXIS (?)

Quick start proceDure

1V VO (20MHz BW)

20mV/DIV

AC-COUPLED

50A TO 75A

LOAD

V

(20MHz BW)

OUT

5mV/DIV

DC2455AA F04

Figure 4. Load Transient 50A to 75A (VIN = 12V, V

= 1V, fSW = 500kHz)

OUT1

Figure 5. Output Voltage Ripple (V V

OUT1

= 1V, I

= 100A fSW = 500kHz)

OUT

DC2455AA F05

= 12V,

IN

Figure 6. Thermal Performance at VIN = 12V, V

4

OUT

= 1V, I

= 100A, TA = 23.8°C, 200LFM Air Flow

OUT

dc2455aaf

DEMO MANUAL DC2455A-A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 CIN1 CAP, 150µF 25% 25V ALUM SUN ELECT., 25HVH150M

2 2 CIN2,CIN11 CAP, 1206 1µF 10% 25V X5R TAIYO YUDEN, TMK316BJ105KD-T

3 8 CIN3-CIN10 CAP, 1210 22µF 10% 25V X5R AVX, 12103D226KAT2A

4 16 CO1, CO2, CO5, CO6, CO7, CO8, CO11,

5 1 C1 CAP, 0603 330pF 10% 50V X7R AVX, 06035C331KAT2A-CT

6 4 C4, C10, C18, C22 CAP, 0603 4.7µF 20% 10V X5R TAIYO YUDEN, LMK107BJ475MA-T

7 7 C6, C11, C19, C23, COUT26, C42, C43 CAP, 0603 1µF 10% 10V X7R TAIYO YUDEN, LMK107BJ105KA-T

8 1 C7 CAP, 0603 0.1µF 10% 25V X7R AVX, 06033C104KAT2A

9 1 C31 CAP, 0603 15nF 10% 50V X7R AVX, 06035C153KAZ2A

10 1 C39 CAP, 0603 100nF 10% 100V X7R MURATA, GRM188R72A104KA35D

11 1 C40 CAP, 0603 150pF 5% 50V C0G AVX, 06035A151JAT2A

12 2 C41, C48 CAP, 1210 100µF 10V X5R MURATA, GRM32ER61A107ME20L

13 8 C41, C44, C45, C48, C52, C53, C54, C55 CAP, 1210 100µF 10% 6.3V X5R MURATA, GRM32ER60J107ME20L

14 1 C46 CAP, 1210 10µF 16V X5R MURATA, GRM32DR61C106KA01L

15 1 C47 CAP, 0603 220pF 10% 50V X7R AVX, 06035C221KAT2A

16 1 C49 CAP, 0603 47nF 10% 50V X7R AVX, 06035C473KAZ2A

17 1 L1 IND, 68 uH, CDRH105 SUMIDA CDRH105RNP-680N

18 2 Q1, Q2 MOSFET, N-CH D-S 40V TO252 VISHAY, SUD50N04-8M8P-4GE3

19 4 R1, R3, R25, R29 RES, 0603 10Ω 5% 1/10W VISHAY, CRCW060310R0JNEA

20 9 R2, R9, R14, R21, R31, R39, R43, R47,

21 4 R4, R36, R41, R98 RES, 0603 10kΩ 5% 1/10W VISHAY, CRCW060310K0JNEA

22 1 R11 RES, 0603 1.74kΩ 1% 1/10W VISHAY, CRCW06031K74FKEA

23 1 R15 RES, 0603 90.9kΩ 1% 1/10W VISHAY, CRCW060390K9FKEA

24 1 R16 RES, 0603 60.4kΩ 1% 1/10W VISHAY, CRCW060360K4FKEA

25 1 R17 RES, 0603 40.2kΩ 1% 1/10W VISHAY, CRCW060340K2FKEA

26 1 R18 RES, 0603 30.1kΩ 1% 1/10W VISHAY, CRCW060330K1FKEA

27 1 R89 RES, 0603 2Ω 1% 1/10W VISHAY CRCW06032R00FNEA

28 1 R92 RES, 0603 3.3Ω 1% 1/10W VISHAY, CRCW06033R3FKEA

29 1

30

31 3 R95, R96, R107 RES, 0603 20kΩ 5% 1/10W VISHAY, CRCW060320K0JNTA

32 1 R97 RES, 0603 681kΩ 1% 1/10W VISHAY, CRCW0603681KFKEA

33 1 R99 RES, 0603 301Ω 1% 1/10W VISHAY, CRCW0603301RFKEA

34 1 R100 RES, 0603 82.5Ω 1% 1/10W VISHAY, CRCW060382R5FKEA

35 2 R101, R102 RES, 2512 0.010Ω 1% 1W VISHAY, WSL2512R01000FEA

36 1 R103 RES POT, 5k BOURNS 3386P-1-502-LF

37 1 R104 RES, 0603 1kΩ 1% 1/10W VISHAY, CRCW06031K00FKEA

38 1 R105 RES, 0603 105kΩ 1% 1/10W VISHAY CRCW0603105KFKEA

39 1 R106 RES, 0603 80.6kΩ 1% 1/10W VISHAY CRCW060380K6FKEA

CO13, CO15, CO16, CO24, CO55, CO56, CO57, CO58, CO59

R51

R93 RES, 0603 154kΩ 1% 1/10W VISHAY, CRCW0603154KFKEA

1 R94 RES, 0603 1MΩ 5% 1/10W VISHAY CRCW06031M00JNEA

CAP, 1206 220µF 20% 4V X5R MURATA, GRM31CR60G227ME11L

RES, 0603 121kΩ 1% 1/10W VISHAY, CRCW0603121KFKEA

dc2455aaf

5

DEMO MANUAL DC2455A-A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

40 2 U1, U2 IC, VOLTAGE REGULATOR, BGA LINEAR TECH., LTM4650EY-1B#PBF

41 1 U5 IC, TimerBlox

42 1 U6 IC, OP-AMP, SINGLE, BIPOLAR LINEAR TECH., LT1803IS5#PBF

43 1 U7 IC, LTC3630EMSE LINEAR TECH., LTC3630EMSE#PBF

Additional Demo Board Circuit Components

1 0 CIN12-CIN19, CO20, CO21, CO22, CO26,

CO27, CO28, CO30, CO32, CO33, CO34, CO35, CO36, CO48, CO50, CO52, CO54

2 0 R13, R34 RES, 0603 OPTION OPTION

3 0 CO3, CO9, CO14, CO17, CO18, CO38,

CO40, CO42, CO45, CO46

4 0 CO4, CO10, CO12, CO19, CO23, CO25,

CO29, CO31, CO37, CO39, CO41, CO43, CO44, CO47, CO49, CO51, CO53

5 0 C2, C3, C5, C8, C9, C12, C17, C20, C21,

C29, C30, C32

6 0 R5, R7, R8, R10, R30, R37, R38, R42,

R44, R48, R49, R50, R52, R53, R55, R61, R64, R87

7 13 R6, R19, R20, R27, R28, R32, R33, R35,

R40, R45, R62, R63, R91

8 4 R22, R23, R24, R26 RES, 2010 0Ω JUMPER VISHAY, CRCW20100000ZEA9

9 1 R60 RES, 1206 0Ω JUMPER VISHAY, CRCW12060000ZOEA

10 0 U3, U4 DO NOT STUFF

Hardware: For Demo Board Only

1 11 E1-E4, E6-E9, E12, E13, E22 TESTPOINT, TURRET, .063" MILL MAX, 2308-2-00-80-00-00-07-0

2 0 E5, E10, E11, E14, E15, E16, E17, E18,

E23, E24, E25, E26, E27, E28, E29, E30

3 2 E33, E34 TESTPOINT, TURRET, .094" MILL MAX, 2501-2-00-80-00-00-07-0

4 4 JP1, JP2, JP9, JP10 HEADER, 3 PIN 2mm SINGLE ROW WURTH ELEKTRONIK, 620-003-111-21

5 5 JP4, JP5, JP6, JP7, JP8 HEADER, 2 PIN 2mm SINGLE ROW WURTH ELEKTRONIK, 620-002-111-21

6 6 J1, J2, J3, J4, J13, J14 STUD, TEST PIN PEM, KFH-032-10

7 12 J1, J2, J3, J4, J13, J14 (x2) NUT, BRASS PL # 10-32 ANY, 10-32M/S BR PL

8 6 J1, J2, J3, J4, J13, J14 LUG RING, #10 KEYSTONE, 8205

9 6 J1, J2, J3, J4, J13, J14 WASHER, TIN PLATED BRASS ANY, #10EXT BZ TN

10 2 J11, J12 CON, BNC, 5 PINS CONNEX, 112404

11 5 XJP1, XJP2, XJP4, XJP9, XJP10 SHUNT 2mm WURTH ELEKTRONIK, 608-002-134-21

12 4 MTGS AT 4 CORNERS STAND-OFF, NYLON KEYSTONE, 8833

CAP, OPTION OPTION

CAP, 1210 OPTION OPTION

CAP, 7343 OPTION OPTION

CAP, 0603 OPTION OPTION

RES, 0603 OPTION OPTION

RES, 0603 0Ω JUMPER VISHAY, CRCW06030000Z0EA

TEST PAD SMD

®

LINEAR TECH., LTC6992IS6-1#PBF

6

dc2455aaf

DEMO MANUAL DC2455A-A

5

4

3

2

1

D

C

B

A

schematic Diagram

D

JL

*

VO+

132

EXT

VO+

E2

CLKOUT_U1

INT

VIN

E3

VOUT

0.6 - 1.8V

GND

VO-

PGOOD

COMP

VO-

INTVCC_U1

C2

OPT

PGOOD

COMP

G9

E6

SW1

PGOOD1

R4

COMP1

RUN

F5

L10

10K

RUN1

L11

PGOOD

E7

TRACK

VOUT

R5

OPT

R6

E5

C5

TRACK1

VOUTS1

VINM2VINM3VINM4VINM5VINM6VINM7VINM8VINM9VIN

VIN

J4

J2

10

R1

CO6

VOUT

CO5

CO40

CO39

+

CO4

+

CO3

CO2

CO1

220uF4V1210

OPT

7343

OPT

7343

OPT

220uF

4V

220uF

4V

E6

10

R3

1210

VO+

C1

330pF

1210

VFB

SW1-1

E5

D5

G2

E23

R2

1%

121K

JP1

CIN6

CIN5

CIN4

CIN3

CIN2

CIN1

+

J1

VIN+

VIN

4.5V -15V

22uF

1uF

150uF

VFB1

Vout

VOUT1

C4

VOUT1

C3

VOUT1

C2

VOUT1

C1

VOUT1

B5

VOUT1

B4

VOUT1

B3

VOUT1

B2

VOUT1

B1

VOUT1

A5

VOUT1

A4

VOUT1

A3

VOUT1

A2

VOUT1

A1

CLKOUT

G5

MODE-PLLIN

F4

TEMP

J6

VIN

J2

VIN

J3

VIN

J4

VIN

J9

VIN

J10

VIN

J11

VIN

K2

VIN

K3

VIN

K4

VIN

K9

VIN

K10

VIN

K11

VINL2VINL3VINL4VINL5VINL6VINL7VINL8VINL9VIN

25V

1210

25V

1210

25V

1210

25V

1210

25V

1206

25V

J3

E4

VIN-

GND

05/22/16

REVISION HISTORY

PRODUCTION-1

DESCRIPTION DATE APPROVEDECO REV

E1

EXT_CLK

CLK

C

RUN

TRACK

VFB

ON

OFF

JP2

RUN

132

C5

OPT

R7

OPT

VIN

R8

OPT

R11

1.74K

C31

15nF

C3

OPT

Vout

E24

0 Ohm

A10

A11

A12

B10

B11

B12

VOUT2

VOUT2B8VOUT2B9VOUT2

VOUT2

C10

VOUT2C9VOUT2

F8

DIFFOUT

VOUT2A8VOUT2A9VOUT2

U1

LTM4650EY-1

VIN

INTVCCH8EXTVCC

J7

M10

M11

R9

EXTVCC

C6

1uF

10V

INTVCC_U1

4.7uF

C4

10V

E8

EXTVCC

TRACK

E9

R63

VFB

C11

C12

D7

VFB2

VOUT2

FSETC6PHASMD

G4

1%

121k

INTVCC_U1

0 Ohm

C7

R62

0 Ohm

SW2-1

E10

PGOOD

COMP

G11

G8

E7

SW2

COMP2

PGOOD2

GNDA6GNDA7GNDB6GNDB7GNDD1GNDD2GNDD3GNDD4GNDD9GND

R10

OPT

0.1uF

VOUT

RUN

F9

B

VFB

VOUT

SELECT

JP5

JP6

JP4

0.9V

1.0V

R14

R15

1%

121K

90.9K

OPT

1210

CO42

CO41

OPT

7343

+

CO10

OPT

7343

+

CO9

OPT

1210

CO8

220uF

1210

4V

CO7

220uF4V1210

VO+ VO-

TRACK

DIFFP

DIFFN

D8

C8

E8

E9

RUN2

DIFFP

DIFFN

TRACK2

VOUTS2

SGND SGND SGND SGND SGND SGND

GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND

GND

E1

D10

D11

D12

JP7

1.2V

1%

R16

60.4K

R60

1206

0 Ohm

SGND

E22

G7 G6 F7 F6 D6 C7

M12

M1

L12

L1

K12 K8 K7 K6 K5 K1

J12 J8 J5 J1

H12 H11

H10 H9 H7 H6 H5 H4 H3 H2 H1

G12

G10 G3 G1

F12

F11

F10 F3 F2 F1

E12

E11

E10 E4 E3 E2

JP8

1.5V

1.8V

R18

1%

R17

30.1K

40.2K

OPT

220uF

Co22,28,30,32

Co34,35,48,50

OPT

220uF

Co20, 21,26,27

Co33,36,52,54

OPT

Cin16, 17, 18, 19

*

OPT

22uF

A

www.linear.com

Milpitas, CA 95035

Phone: (408)432-1900

Milpitas, CA 95035

Phone: (408)432-1900

Milpitas, CA 95035

Phone: (408)432-1900

Fax: (408)434-0507

1630 McCarthy Blvd.

APPROVALS

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

1



LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY

STEP-DOWN MODULE REGULATOR

LTM4650EY‐1

HIGH EFFICIENCY, POLYPHASE, DC/DC

TECHNOLOGY

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

DEMOCIRCUIT2455A‐(A,B,C)

IC NO. REV.

SCHEMATIC

N/A

SIZE

TITLE:

LT

JL

SCALE = NONE

PCB DES.

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

SCALE = NONE

APP ENG.

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

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

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

220uF

22uF

5

1

SHEET OF

1

Monday, May 23, 2016

DATE:

2

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

3

4

Cin12, 13, 14, 15

0

OPT

R34

R13

*

R13

Iout

I.C.

ASSY

OPT0OPT

100A

150A

U1,U2,U3

‐A U1,U2

‐B

200A

5

U1,U2,U3,U4

‐C

1.ALLCAPACITORS,RESISTORS0603.

NOTE:UNLESSOTHERWISESPECIFIED,

dc2455aaf

7

DEMO MANUAL DC2455A-A

D

C

schematic Diagram

1

VOUT

2

3

CLKOUT_U2

CLKOUT_U1

R20

R19

0 Ohm

4

R21

5

VIN

CO57

220uF4V1210

CO56

220uF4V1210

OPT

1210

CO46

CO44

OPT

7343

+

OPT

CO14

1210

CO13

220uF

1210

4V

CO12

OPT

7343

+

CO11

220uF4V1210

VFB

D5

Vout

E25

1%

121K

CIN10

CIN9

CIN8

CIN7

VFB1

VOUT1

C4

VOUT1

C3

VOUT1

C2

VOUT1

C1

VOUT1

B5

VOUT1

B4

VOUT1

B3

VOUT1

B2

VOUT1

B1

VOUT1

A5

VOUT1

A4

VOUT1

A3

VOUT1

A2

VOUT1

A1

CLKOUT

G5

F4

TEMP

J6

VIN

J2

VIN

J3

VIN

J4

VIN

J9

VIN

J10

VIN

J11

VIN

K2

VIN

K3

VIN

K4

VIN

K9

VIN

K10

VIN

K11

VINL2VINL3VINL4VINL5VINL6VINL7VINL8VINL9VIN

22uF

25V

1210

22uF

25V

1210

22uF

25V

1210

22uF

25V

1210

VOUT2_U2VOUT

R22

R23

2010

0 Ohm

REMOVE 0 OHM JUMPERS

FOR SEPARATE VOUT2_U2.

VOUT/

VOUT2_U2

VO2+

J14

E12

VO2+

C8

OPT

C9

OPT

SW1-2

E11

COMP

PGOOD

RUN

TRACK

G2

G9

E6

F5

E5

SW1

RUN1

COMP1

TRACK1

PGOOD1

MODE-PLLIN

VINM2VINM3VINM4VINM5VINM6VINM7VINM8VINM9VIN

VIN

L10

L11

C5

VOUTS1

10

R25

VOUT2_U2

DIFFOUT_U2

F8

DIFFOUT

U2

M10

CO25

CO43

CO38

CO19

CO18

CO17

CO16

CO15

A10

VOUT2A8VOUT2A9VOUT2

VIN

M11

INTVCC_U2

+

CO45

+

A11

R24

R26

2010

0 Ohm

GND

J13

7343

OPT

10

R29

OPT

1210

OPT

7343

VO2+

1210

OPT

7343

OPT

1210

OPT

1210

220uF

1210

4V

220uF4V1210

E26

A12

B10

B11

B12

C10

VOUT2

VOUT2B8VOUT2B9VOUT2

VOUT2

VOUT2C9VOUT2

LTM4650EY-1

INTVCCH8EXTVCC

J7

R31

EXTVCC

C11

1uF

10V

C10

10V

4.7uF

R30

INTVCC_U2

2010

0 Ohm

VO2-

E13

VO2-

C12

OPT

Vout2

VFB_U2

C11

C12

D7

VFB2

VOUT2

FSETC6PHASMD

G4

1%

121K

OPT

PGOOD

VFB

R28

R27

0 Ohm

PGOOD_U2

VFB_U2

R37

OPT

C13

OPT

INTVCC_U2

R36

10K

E14

SW2-2

COMP_U2

PGOOD_U2

G11

G8

E7

SW2

COMP2

PGOOD2

GNDA6GNDA7GNDB6GNDB7GNDD1GNDD2GNDD3GNDD4GNDD9GND

R34

*

COMP

R32

0 Ohm

COMP_U2

C32

OPT

C15

OPT

RUN_U2

F9

C8

RUN2

RUN

R33

0 Ohm

RUN_U2

R64

OPT

TRACK_U2

D8

TRACK2

VOUTS2

D10

TRACK

R35

0 Ohm

TRACK_U2

C14

OPT

VO2+ VO2-

E8

E9

DIFFP

DIFFN

GND

E1

D11

D12

VOUT2_U2

DIFFOUT_U2

R61

R38

OPT

SGND

GND

5

1

2

www.linear.com

SHEET OF



Milpitas, CA 95035

Phone: (408)432-1900

Milpitas, CA 95035

Phone: (408)432-1900

Milpitas, CA 95035

Phone: (408)432-1900

Fax: (408)434-0507

1630 McCarthy Blvd.

LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY

TECHNOLOGY

SCHEMATIC

TITLE:

LT

JL

APPROVALS

PCB DES.

APP ENG.

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

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

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

OPT

G7

G6 F7 F6

D6

C7

M12

M1

L12

L1

K12 K8 K7 K6 K5 K1

J12

J8 J5 J1

H12

H11

H10 H9 H7 H6 H5 H4 H3 H2 H1

G12

G10 G3 G1

F12 F11

F10 F3 F2 F1

E12

E11

E10

E4 E3 E2

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

1

STEP-DOWN MODULE REGULATOR

LTM4650EY‐1

HIGH EFFICIENCY, POLYPHASE, CD/CD

DEMOCIRCUIT2455A‐(A,B,C)

Monday, May 23, 2016

IC NO. REV.

N/A

SIZE

DATE:

SIZE

DATE:

SIZE

DATE:

SCALE = NONE

2

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

3

4

5

D

8

C

B B

A A

dc2455aaf

DEMO MANUAL DC2455A-A

5

4

3

2

1

schematic Diagram

5

1

3

www.linear.com

COMP

VFB

10K

CO58

220uF

4V

1210

VOUT

4V

CO48*1210

CO47

OPT

7343

+

CO24

220uF4V1210

7343

CO23

OPT

+

4V

CO22*1210

4V

CO21*1210

4V

CO20

*

1210

INTVCC_U3

C16

OPT

R41

VFB

1210

1206

C4 C3 C2 C1 B5 B4 B3 B2 B1 A5 A4 A3 A2 A1

G5

F4

J6

J2 J3 J4 J9 J10 J11 K2 K3 K4 K9 K10 K11

D5

VFB1

VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1

CLKOUT

TEMP

VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN

VINL2VINL3VINL4VINL5VINL6VINL7VINL8VINL9VIN

SW1-3

E15

RUN

COMP

PGOOD

TRACK

G2

G9

E6

F5

E5

SW1

RUN1

COMP1

TRACK1

PGOOD1

MODE-PLLIN

VINM2VINM3VINM4VINM5VINM6VINM7VINM8VINM9VIN

VIN

L10

L11

Vout

E27

CLKOUT_U2

CLKOUT_U3

CLKOUT_U2

CLKOUT_U3

R40

0 Ohm

R39

1%

121K

*

25V

CIN15

*

25V

CIN14

*

25V

CIN13

*

25V

CIN12

1uF

25V

CIN11

VIN

PGOOD

C5

VOUTS1

RUN

C17

OPT

Vout

E28

A10

A11

A12

B10

B11

VOUT2A8VOUT2A9VOUT2

VOUT2

VOUT2B8VOUT2B9VOUT2

VOUT2

B12

VOUT2

F8

DIFFOUT

U3

LTM4650EY-1

VIN

INTVCCH8EXTVCC

J7

M10

M11

EXTVCC

C19

1uF

INTVCC_U3

C18

10V

4.7uF

INTVCC_U3

VOUT

C10

C11

C12

VOUT2C9VOUT2

VOUT2

FSETC6PHASMD

R43

1%

121K

10V

R42

OPT

4V

CO50*1210

7343

CO49

OPT

+

7343

CO29

OPT

+

4V

CO28*1210

4V

CO27

*

4V

*

CO26

E16

VFB

D7

VFB2

G4

1210

SW2-3

COMP

PGOOD

G11

G8

E7

SW2

COMP2

PGOOD2

GNDA6GNDA7GNDB6GNDB7GNDD1GNDD2GNDD3GNDD4GNDD9GND

R44

OPT

RUN

F9

TRACK

Milpitas, CA 95035

Phone: (408)432-1900

Milpitas, CA 95035

Phone: (408)432-1900

Milpitas, CA 95035

Phone: (408)432-1900

Fax: (408)434-0507

1630 McCarthy Blvd.

LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY

TECHNOLOGY

LT

APPROVALS

PCB DES.

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

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

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

INTVCC_U3

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

TRACK

D8

C8

E8

E9

RUN2

DIFFP

DIFFN

TRACK2

VOUTS2

SGND

G7

SGND

G6

SGND

F7

SGND

F6

SGND

D6

SGND

C7

GND

M12

GND

M1

GND

L12

GND

L1

GND

K12

GND

K8

GND

K7

GND

K6

GND

K5

GND

K1

GND

J12

GND

J8

GND

J5

GND

J1

GND

H12

GND

H11

GND

H10

GND

H9

GND

H7

GND

H6

GND

H5

GND

H4

GND

H3

GND

H2

GND

H1

GND

G12

GND

G10

GND

G3

GND

G1

GND

F12

GND

F11

GND

F10

GND

F3

GND

F2

GND

F1

GND

E12

GND

E11

GND

E10

GND

E4

GND

E3

GND

E2

GND

E1

D10

D11

D12

SHEET OF



1

STEP-DOWN MODULE REGULATOR

LTM4650EY‐1

HIGH EFFICIENCY, POLYPHASE, DC/DC

DEMOCIRCUIT2455A‐(A,B,C)

Monday, May 23, 2016

IC NO. REV.

SCHEMATIC

N/A

SIZE

DATE:

SIZE

DATE:

SIZE

DATE:

TITLE:

JL

SCALE = NONE

APP ENG.

2

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

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

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

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

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

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

3

4

5

D D

C C

B B

A A

dc2455aaf

9

DEMO MANUAL DC2455A-A

5

4

3

2

1

D

C

B

A

schematic Diagram

D

VFB

COMP

RUN

TRACK

CO59

220uF4V1210

VOUT

CO55

220uF4V1210

4V

CO52*1210

CO51

OPT

7343

+

4V

CO33*1210

CO32*1210

4V

CLKOUT_U3

R45

0 Ohm

CO31

OPT

7343

+

CO30*4V

Vout

E29

R47

1%

121K

CIN19

CIN18

CIN17

CIN16

VIN

C20

OPT

1210

E17

SW1-4

COMP

VFB

PGOOD

D5

G2

G9

E6

SW1

VFB1

COMP1

PGOOD1

VOUT1

C4

VOUT1

C3

VOUT1

C2

VOUT1

C1

VOUT1

B5

VOUT1

B4

VOUT1

B3

VOUT1

B2

VOUT1

B1

VOUT1

A5

VOUT1

A4

VOUT1

A3

VOUT1

A2

VOUT1

A1

CLKOUT

G5

MODE-PLLIN

F4

TEMP

J6

VIN

J2

VIN

J3

VIN

J4

VIN

J9

VIN

J10

VIN

J11

VIN

K2

VIN

K3

VIN

K4

VIN

K9

VIN

K10

VIN

K11

VINL2VINL3VINL4VINL5VINL6VINL7VINL8VINL9VIN

*

25V

1210

*

25V

1210

25V

*

1210

*

25V

1210

VOUT

C21

OPT

RUN

TRACK

F5

E5

RUN1

TRACK1

VINM2VINM3VINM4VINM5VINM6VINM7VINM8VINM9VIN

VIN

L10

L11

R48

C5

OPT

VOUTS1

VOUT

R49

OPT

C

PGOOD

4V

*

CO54

1210

CO53

OPT

7343

+

CO37

OPT

7343

+

4V

*

1210

CO36

4V

*

1210

CO35

4V

*

CO34

1210

Vout

E30

A10

A11

A12

B10

B11

B12

C10

C11

VOUT2

VOUT2B8VOUT2B9VOUT2

VOUT2

VOUT2C9VOUT2

C12

VOUT2

F8

DIFFOUT

VOUT2A8VOUT2A9VOUT2

U4

LTM4650EY-1

VIN

M10

M11

INTVCC_U4

INTVCCH8EXTVCC

J7

EXTVCC

C23

10V

C22

4.7uF

INTVCC_U4

FSETC6PHASMD

R51

121K

1uF

10V

R50

OPT

1%

E18

VFB

D7

VFB2

G4

SW2-4

COMP

PGOOD

G11

G8

E7

SW2

COMP2

PGOOD2

GNDA6GNDA7GNDB6GNDB7GNDD1GNDD2GNDD3GNDD4GNDD9GND

R52

OPT

RUN

F9

B

VO+

C29

R53

OPT

VO-

C30

R55

OPT

DIFFN

GND

OPT

SGND

G7

SGND

G6

SGND

F7

SGND

F6

SGND

D6

SGND

C7

GND

M12

GND

M1

GND

L12

GND

L1

GND

K12

GND

K8

GND

K7

GND

K6

GND

K5

GND

K1

GND

J12

GND

J8

GND

J5

GND

J1

GND

H12

GND

H11

GND

H10

GND

H9

GND

H7

GND

H6

GND

H5

GND

H4

GND

H3

GND

H2

GND

H1

GND

G12

GND

G10

GND

G3

GND

G1

GND

F12

GND

F11

GND

F10

GND

F3

GND

F2

GND

F1

GND

E12

GND

E11

GND

E10

GND

E4

GND

E3

GND

E2

TRACK

D8

C8

E8

E9

RUN2

DIFFP

TRACK2

VOUTS2

GND

E1

D10

D11

D12

A

www.linear.com

Milpitas, CA 95035

Phone: (408)432-1900

Milpitas, CA 95035

Phone: (408)432-1900

Milpitas, CA 95035

Phone: (408)432-1900

Fax: (408)434-0507

1630 McCarthy Blvd.

LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY

TECHNOLOGY

LT

APPROVALS

PCB DES.

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

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

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

5

1

4

SHEET OF



1

STEP-DOWN MODULE REGULATOR

LTM4650EY‐1

HIGH EFFICIENCY, POLYPHASE, DC/DC

DEMOCIRCUIT2455A‐(A,B,C)

Monday, May 23, 2016

IC NO. REV.

SCHEMATIC

N/A

SIZE

DATE:

SIZE

DATE:

SIZE

DATE:

TITLE:

JL

SCALE = NONE

APP ENG.

2

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

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

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

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

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

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

3

4

5

10

dc2455aaf

schematic Diagram

5

4

3

2

1

D D

C C

B B

A A

VOUT

PULSE

DYNAMIC LOAD CIRCUIT

70Hz, 3% Duty Cycle

INT EXT

1%

IOUT STEP

OPTIONAL 5V BIAS

ON

OFF

BIAS

LT

LTM4650EY‐1

DEMOCIRCUIT2455A‐(A,B,C)

LT

JL



+5V

VIN

+5V

EXTVCC

VOUT

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

1

Monday, May 23, 2016

5

HIGH EFFICIENCY, POLYPHASE, DC/DC

N/A

STEP-DOWN 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

1

Monday, May 23, 2016

5

HIGH EFFICIENCY, POLYPHASE, DC/DC

N/A

STEP-DOWN 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

1

Monday, May 23, 2016

5

HIGH EFFICIENCY, POLYPHASE, DC/DC

N/A

STEP-DOWN MODULE REGULATOR

J12

R100

82.5

1%

J11

R89

2

E34

GND

R106

80.6k

1%

R95

20K

E33

EXT PULSE

R105

105K

1%

U6 LT1803IS5

VOUT

1

V-2+IN

3

-IN

4

V+

5

C43

1uF

C41

100uF

10V

1210

C46

10uF

16V

1210

C42

1uF

C45

100uF

1210

6.3V

C49

47nF

R104

1K

C53

100uF

1210

6.3V

Q1

SUD50N04-8M8P-4EG3

U5 LTC6992IS6-1

MOD1GND2SET

3

DIV

4V+5

OUT

6

C55

100uF

1210

6.3V

R87

OPT

C39

100nF

R97

681K

1%

JP10

1

2

3

R101

0.01

2512

R107

20K

C48

100uF

10V

1210

C44

100uF

1210

6.3V

R91 0 Ohm

C47

220pF

R96

20K

R94 1M

R102

0.01

2512

R99

301

R103

5K

C52

100uF

1210

6.3V

Q2

SUD50N04-8M8P-4EG3

C40

150pF

C54

100uF

1210

6.3V

R92

3.3

1%

R98

10K

COUT26

1uF

L1

68uH

SUMIDA CDRH105

C51

OPT

U7

LTC3630EMSE

SW

1

VIN

3

FBO

12

VPRG17VPRG2

6

GND

8

VFB

9

SS

10

ISET

11

GND

14

RUN

5

GND

16

GND

17

R93

154k

JP9

123

DEMO MANUAL DC2455A-A

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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

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11

DEMO MANUAL DC2455A-A

DEMONSTRATION BOARD IMPORTANT NOTICE

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

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

LTC 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 LTC application engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Linear Technology Corporation

12

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

dc2455aaf

LT 0616 • PRINTED IN USA