Linear Technology DC1477B Quick setup guide

dc1477bfa

DEMO MANUAL DC1477B

Description

LTM4609EV: 36VIN, 34VOUT

Buck-Boost DC/DC

µModule

Regulator

Demonstration circuit DC1477B features the LT M

4609EV,

the high voltage, high efficiency, high density switch mode

buck-boost power module. The LTM4609EV regulates

an output voltage above, below, or equal to the input

voltage. DC1477B accepts an input voltage from 10V

to 36V with a preset output voltage of 30V at up to 3A.

Derating may be necessary for certain VIN, VOUT, and

thermal conditions. An optional input π filter is added on

the DC1477B to minimize the input ripple. The switching

frequency may be synchronized to an external clock from

L, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks of

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

performance summary

BoarD photo

200kHz to 400kHz to reduce undesirable frequency har-

monics and/or parallel multiple modules for even higher

output current. The LTM4609 data sheet must be read in

conjunction with this demo manual prior to working on

or modifying demo circuit DC1477B.

Design files for this circuit board are available at

http://www.linear.com/demo/DC1477B

(TA= 25°C)

PARAMETER CONDITIONS VALUE

Minimum Input Voltage 10V to 36V

Output Voltage VOUT 30V ± 2%

Maximum Continuous Output Current Derating is Necessary for Certain VIN, VOUT, and Thermal

Conditions

3ADC at 10VIN

8ADC at 24VIN

10ADC at VIN > 30V

Default Operating Frequency 300kHz

Efficiency VIN = 20V, VOUT = 30V, IOUT = 3A 96.7%, See Figure 3 for More Information

dc1477bfa

DEMO MANUAL DC1477B

Quick start proceDure

Demonstration circuit DC1477B is an easy way to evalu-

ate the performance of the LTM4609EV. 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

30VOUT application:

RUN CLOCK MODE START

ON PROG CCM SSO

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

supply, load and meters as shown in Figure 1. Preset

the load to 0A and VIN supply between 10V to 36V.

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

should be 30V ± 2%.

4. Once the proper output voltage is established, adjust the

load within the operating range and observe the output

voltage regulation, ripple voltage, efficiency and other

parameters. A cooling fan and heat sink are necessary

for VIN <10V and IOUT = 3A.

5. To measure input and output ripple, please refer to

Figure 2 for proper setup.

6. To adjust the switching frequency turn off the power

supply and modify R6 and R7. Do not allow voltage at

pin PLLFLTR to exceed 2.4V.

7. Inductor and RSENSE should be modified to accom-

modate certain input and output condition. Refer to

the data sheet for details.

8. The input filter formed by CIN2, L2 and L3, CIN3 and

CIN4 is for the purpose of reducing the input voltage

ripple. The magnetic beads L2 and L3 are not necessary,

but they help to reduce the high frequency ringings on

the input supply significantly. See Figure 5 for details.

9. The optional components Rsnb1 and Csnb1, Rsnb2 and

Csnb2 can be used to form RC snubber circuits on the

switching nodes, which may help to reduce the output

ripple. Refer to the data sheet for details.

dc1477bfa

DEMO MANUAL DC1477B

Quick start proceDure

Figure 1. Test Setup of DC1477B

Figure 2. Proper Scope Probe Placement for Measuring Input or Output Ripple

+–

–

LOAD

0 TO 3A

VIN

–

– +

INPUT OR OUTPUT CAPACITOR

dc1477bfa

DEMO MANUAL DC1477B

Quick start proceDure

LOAD CURRENT (A)

DC1477B/LTM4609 EFFICIENCY AT 10VIN Input

100

0.5 1 1.5 2 2.5 3

EFFICIENCY (%)

DCM

BURST

CCM

LOAD CURRENT (A)

DC1477B/LTM4609 EFFICIENCY AT 20VIN Input

100

0.5 1 1.5 2 2.5 3

EFFICIENCY (%)

DCM

BURST

CCM

LOAD CURRENT (A)

DC1477B/LTM4609 EFFICIENCY AT 30VIN Input

100

0.5 1 1.5 2 2.5 3

EFFICIENCY (%)

DCM

BURST

CCM

LOAD CURRENT (A)

DC1477B/LTM4609 EFFICIENCY AT 36VIN Input

100

0.5 1 1.5 2 2.5 3

EFFICIENCY (%)

DCM

CCM

Figure 3. Measured Efficiency at Different VIN

dc1477bfa

DEMO MANUAL DC1477B

Quick start proceDure

Figure 4. Measured Load Transient Response (1.5A Step, 50% to 100%)

Figure 5. Input Voltage Ripple Measured at CIN1 with 300MHz BW Probe, with and without the Input Filter

VOUT (500mV/DIV)

IOUT STEP (1A/DIV)

VIN = 10V, VOUT = 30V, CCM MODE

1.5A to 3A LOAD STEP

COUT = 2 ×10µF CERAMIC + 2 ×100µF ALUM

VOUT (200mV/DIV)

IOUT STEP (1A/DIV)

VIN = 36V, VOUT = 30V, CCM MODE

1.5A to 3A LOAD STEP

COUT = 2 ×10µF CERAMIC + 2 ×100µF ALUM

VIN (1V/DIV)

SW2 (10V/DIV)

SW1 (20V/DIV)

VIN = 10V, VOUT = 30V, IOUT = 3A

W/O INPUT FILTER: SHORT L2 AND L3, REMOVE CIN2

VIN = PEAK-TO-PEAK RIPPLE = 2.78V

VIN (1V/DIV)

SW2 (10V/DIV)

SW1 (20V/DIV)

VIN = 10V, VOUT = 30V, IOUT = 3A

W/ INPUT FILTER: STUFF L2, L3, AND CIN2

VIN PEAK-TO-PEAK RIPPLE = 0.47V

dc1477bfa

DEMO MANUAL DC1477B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 CSS CAP., 0.1µF, X7R, 25V, 10%, 0603 AVX, 06033C104KAT2A

2 1 CIN1 CAP., ALUM. ELECT., 100µF, 50V, 20%, ME -WX

SERIES, THROUGH-HOLE, STRAIGHT-PIN

SUN ELECTRONIC INDUSTRIES CORPORATION,

50ME100WX+TS

3 2 CO3, CO4 CAP., 10µF, X7R, 35V, 10%, 1210 MURATA, GRM32ER7YA106KA12L

4 3 CIN2, CIN3, CIN4 CAP., X7R, 4.7µF, 50V, 10%, 1206 TAIYO YUDEN, UMK316BJ475KL-T

5 2 CO5, CO6 CAP., ALUM., 100µF, 35V, 20%, HVH SERIES SUN ELECTRONIC INDUSTRIES CORPORATION,

35HVH100M

6 1 L1 IND., POWER, 3.3µH, 20%, IHLP-5050FD-01 VISHAY, IHLP5050FDER3R3M01

7 1 R1 RES., 100kΩ, 5%, 1/10W, 0603 VISHAY, CRCW0603100KJNEA

8 1 R5 RES., 2.74kΩ, 1%, 1/10W, 0603 VISHAY, CRCW06032K74FKEA

9 1 R6 RES., 4.64kΩ, 1%, 1/10W, 0603 VISHAY, CRCW06034K64FKEA

10 1 R7 RES., 1.21kΩ, 1%, 1/10W, 0603 VISHAY, CRCW06031K21FKEA

11 2 RS1, RS2 RES., PWR. METAL STRIP, 0.015Ω, 1%, 1/4W, 1206 VISHAY, WSL1206R0150FEA

12 1 U1 I.C., HIGH DENSITY, HIGH OUTPUT BUCK-BOOST

µModule, 15mm × 15mm × 2.82mm, LGA

LINEAR TECH., LTM4609EV#PBF

Additional Demo Board Circuit Components

1 0 CIN5, Csnb1, Csnb2, C07

(OPT)

CAP., OPTION, 1206 OPT.

2 0 C2, C4, C5, CP, CFF (OPT) CAP., OPTION, 0603 O P T.

3 0 CO1, CO2, CO8 (OPT) CAP., OPTION, D3L O P T.

4 2 D1, D2 DIODE, ZENER, 4.7V, 5%, 250mW, SOD-323 CENTRAL SEMI., CMDZ5230B TR LEAD FREE

5 2 L2, L3 IND., HIGH CURRENT, 50Ω, 25%, 6A, 1806 FAIR-RITE PRODUCTS CORP., 2518065007Y6

6 1 R2 RES., 51kΩ, 5%, 1/10W, 0603 VISHAY, CRCW060351K0JNEA

7 1 R8 RES., 20kΩ, 1%, 1/10W, 0603 VISHAY, CRCW060320K0FKEA

8 0 RS3, Rsnb1, Rsnb2 (OPT) RES., OPTION, 1206 O P T.

9 0 R9, RUVLO (OPT) RES., OPTION, 0603 O P T.

Hardware-For Demo Board Only

1 2 JP1, JP2 CONN., HEADER, 1×3, 2mm SAMTEC, TMM-103-02-L-S

2 2 JP3, JP4 CONN., HEADER, 1×4, 2mm SAMTEC, TMM-104-02-L-S

3 4 JP1, JP2, JP3, JP4 SHUNT, 2mm SAMTEC, 2SN-BK-G

4 10 TP1, TP4, TP5, TP7, TP9,

TP11-TP15

TEST POINT, TURRET

, 0.094" MTG. HOLE MILL-MAX, 2501-2-00-80-00-00-07-0

5 4 TP2, TP3, TP8, TP10 CONN., JACK, BANANA, NON-INSULATED, 0.218" KEYSTONE, 575-4

6 4 MH1, MH2, MH3, MH4 STANDOFF, NYLON, SNAP-ON, 0.500" KEYSTONE, 8833 (SNAP ON)

dc1477bfa

DEMO MANUAL DC1477B

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

3A MAX

RUN

OFF

DCM

CCM

(BURST / PULSE SKIP) PS

OFF

SSO (SOFT START ON)

LO (LDO ON)

EXT

PROG

CLOCK

30V

MODE

Derating Necessary for Certain Input

and Output Voltages.

START

DCM

SOFT

START ON

LDO ON

OFF

MODE

OFF

SSO

BURST/

START

CCMCCM

DCM

SKIP_CYCLE

10V - 36V

50V50V

LTM4609EV

50V

VSS

VIN

INTVCC

VOUT

VIN1

INTVCC

VIN1

INTVCC

VIN1

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

SAM Y.

PRODUCTION

110-31-11

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

SAM Y.

PRODUCTION

110-31-11

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

SAM Y.

PRODUCTION

110-31-11

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 Condential-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 T O

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 AN D

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Monday, January 23, 2012

1 1

High Density, High Output Buck-Boost Power uModule

SAM Y.

LTM4609EV

DEMO CIRCUIT 1477B

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 Condential-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 T O

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 AN D

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Monday, January 23, 2012

1 1

High Density, High Output Buck-Boost Power uModule

SAM Y.

LTM4609EV

DEMO CIRCUIT 1477B

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 Condential-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 T O

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 AN D

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Monday, January 23, 2012

1 1

High Density, High Output Buck-Boost Power uModule

SAM Y.

LTM4609EV

DEMO CIRCUIT 1477B

L2 0.4uHL2 0.4uH

TP15

INTVCC TP15

INTVCC

(OPT)

TP11 VO-

RS3

(OPT)

RS3

(OPT)

TP3

VIN- TP3

VIN- R9

(OPT)

JP1JP1

Cin2

4.7uF

Cin2

4.7uF

(OPT)

Cin4

4.7uF

Cin4

4.7uF

L1 3.3uH

RS1

0.015

RS1

0.015

U1U1

VIN

L12

VIN

K11

VIN

J10

VIN

M10

VIN

L11VIN

L10VIN

K12

VIN

J11

VIN

J12

VIN

K10

GND

C11

GND

C10

GND

VOUT G2

VOUT G3

VOUT G4

VOUT H1

VOUT H2

VOUT H3

VOUT H4

COMP

EXTVCC

RSENSE G5

GND

C12 GND

D1 GND

D2 GND

D3 GND

GND

D10

VFB B6

SW1 J1

SW2 J8

VOUT G1

VOUT E2

VOUT E1

VIN

M11

VIN

M12

INTVCC

PGOOD

RUN

PLLFLTR

PLLIN

FCB

STNDBY

A10

SGND

GND

D11 GND

D12 GND

E3 GND

E4 GND

E5 GND

E6 GND

E7 GND

E8 GND

E9 GND

E10 GND

E11 GND

E12

GND

A11 GND

A12

GND

B10 GND

B11 GND

B12

SENSE+A4

SENSE-A5

RSENSE G6

RSENSE G7

RSENSE G8

RSENSE G9

RSENSE G10

RSENSE G11

RSENSE G12

RSENSE H5

RSENSE H6

RSENSE H7

RSENSE H8

RSENSE H9

RSENSE H10

RSENSE H11

RSENSE H12

RSENSE J5

RSENSE J6

RSENSE J7

RSENSE K5

RSENSE K6

RSENSE L5

RSENSE L6

RSENSE M5

RSENSE M6

RSENSE F10

RSENSE F11

RSENSE F12

VOUT F1

VOUT F2

VOUT F3

VOUT F4

SW1 J2

SW1 J3

SW1 J4

SW1 K1

SW1 K2

SW1 K3

SW1 K4

SW1 L1

SW1 L2

SW1 L3

SW1 L4

SW1 M1

SW1 M2

SW1 M3

SW1 M4

SW2 J9

SW2 K7

SW2 K8

SW2 K9

SW2 L7

SW2 L8

SW2 L9

SW2 M7

SW2 M8

SW2 M9

NC F8

NC F9

NC F7

RUVLO

(OPT)

RUVLO

(OPT)

Cin1

50V

100uF

Cin1

50V

100uF

RS2

0.015

RS2

0.015

CFF

(OPT)

CFF

(OPT)

Csnb2 (OPT)Csnb2 (OPT)

1.21K

TP7 VO+

CO5

100uF

35V

CO5

100uF

35V

51K

TP9

EXTVCC TP9

EXTVCC

JP4JP4

Cin5

(OPT)

Cin5

(OPT)

TP1

VIN TP1

VIN

CO3

10uF

35V

CO3

10uF

35V

CMDZ5230B

2 1

TP13

SGND TP13

SGND

L3 0.4uHL3 0.4uH

CO7

(OPT)

35V

CO7

(OPT)

35V

2.74K

TP2

VIN+ TP2

VIN+

Rsnb1 (OPT)Rsnb1 (OPT)

TP5

PGOODTP5

PGOOD

TP4

GND TP4

GND

TP12

SOFT START TP12

SOFT START

CO4

10uF

35V

CO4

10uF

35V

CO8

(OPT)

CO8

(OPT)

JP3JP3

TP14

EXT. CLOCK TP14

EXT. CLOCK

Cin3

4.7uF

Cin3

4.7uF

CSS 0.1uF

JP2JP2

TP10

GND

TP10

GND

CO2

(OPT)

CO2

(OPT)

C2 (OPT)C2 (OPT)

TP8 VOUT

R8 20KR8 20K

C4 (OPT)C4 (OPT)

Csnb1 (OPT)Csnb1 (OPT)

100K

CO1

(OPT)

CO1

(OPT)

R6 4.64KR6 4.64K

Rsnb2 (OPT)Rsnb2 (OPT)

CO6

100uF

35V

CO6

100uF

35V

CMDZ5230B

2 1

dc1477bfa

DEMO MANUAL DC1477B

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

 LINEAR TECHNOLOGY CORPORATION 2012

LT 0415 REV A • PRINTED IN USA

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 applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

Analog Devices Inc.:

DC1477B

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