1dc1663af

DEMO MANUAL DC1663A

DESCRIPTION

LTM4628EV High Efficiency, Dual 8A Step-Down Power

µModule Regulator

BOARD PHOTO

Demonstration circuit DC1663A features the LTM®4628EV, the high efficiency, high density, dual 8A output, switch mode step-down power module. The input voltage is from 4.5V to 26.5V. The output voltage is programmable from 0.6V to 5.5V. 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. The DC1663A sets the LTM4628EV default switching frequency to 400kHz; however the frequency is resistor programmable from 250kHz up to 780kHz. An internal phase-lock loop allows the module to be synchronized to an external clock. 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 ratio metrically 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 LTM4628EV in a compact 15mm × 15mm × 4.32mm LGA package make it ideal for use in many high density point of load regulation applications. The LTM4628 datasheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC1663A.

Design files for this circuit board are available at http://www.linear.com/demoL, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

2dc1663af

DEMO MANUAL DC1663A

QUICK START PROCEDURE

PERFORMANCE SUMMARY

Demonstration circuit DC1663A is easy to set up to evalu-ate the performance of the LTM4628EV. Please refer to Figure 1 for proper measurement equipment setup and the following the procedure:

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

60°

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 12V.

3. Turn on the power supply at the input. The output volt-age in channel 1 should be 1.5V ± 1.5% and the output voltage in channel 2 should be 1.2V ± 1.5%.

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 and other parameters. Output ripple should be measured at J1 and J2 with SMA cables. 50Ω termination should be set on the oscilloscope or SMA cables.

5. (Optional) For optional load transient test, apply an adjustable pulse signal between IOSTEP CLK and GND pins. Pulse amplitude (3V to 3.5V) sets the load step current amplitude. The pulse signal should have very small duty cycle (< 10%) to limit the thermal stress on the transient load circuit. The output transient current can be monitored at the SMA connector J3 (15mV/A). Apply the jumper resistors R34 or R35 (on the back-side of boards) to apply load transient on channel 1 or channel 2 correspondingly.

6. (Optional) LTM4628 can be synchronized to an external clock signal. Remove the jumper on JP1 and apply a clock signal (0V to 5V, square wave) on the CLKIN test point.

7. (Optional) The outputs of LTM4628 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) LTM4628 can be configured for a 2-phase single output at up to 16A on DC1663A. Refer to the schematic for corresponding jumper resistor setup for dual phase single output applications.

PARAMETER CONDITION VALUE

Input Voltage Range 4.5V to 26.5V

Output Voltage VOUT1 VIN = 4.5 to 26.5V, IOUT1 = 0A to 8A, JP1: CCM 1.5V ± 1.5% (1.4775V to 1.5225V)

Output Voltage VOUT2 VIN = 4.5 to 26.5V, IOUT2 = 0A to 8A, JP1: CCM 1.2V ± 1.5% (1.182V to 1.218V)

Per Channel Maximum Continuous Output Current Derating is Necessary for Certain VIN, VOUT and Thermal Conditions, See Datasheet for Details.

8A

Default Operating Frequency 400kHz

External Clock Synchronous Frequency Range 400kHz to 780kHz

Efficiency of Channel 1 VIN = 5V, VOUT1 = 1.5V, IOUT1 = 8A, fSW = 400 kHz 87.7% See Figure 2

Efficiency of Channel 2 VIN = 5V, VOUT2 = 1.2V, IOUT2 = 8A, fSW = 400 kHz 85.5% See Figure 3

Load Transient of Channel 1 VIN = 12V, VOUT1 = 1.5V, ISETP = 0A to 4A See Figure 4

Load Transient of Channel 2 VIN = 12V, VOUT2 = 1.2V, ISETP = 0A to 4A See Figure 5

(TA = 25°C)

3dc1663af

DEMO MANUAL DC1663A

QUICK START PROCEDURE

Figure 1. Test Setup of DC1663A

–

–

++

+ –V

+ –V+–

V

A

+ –A

VIN4.5V TO 26.5V

LOAD 0A TO 8A

+–A

LOAD 0A TO 8A

1663a F01

VOUT1VOUT2

4dc1663af

DEMO MANUAL DC1663A

QUICK START PROCEDURE

Figure 2. Measured Efficiency on Channel 1 (VOUT1 = 1.5V, fSW = 400kHz, Channel 2 Disabled)

Figure 4. Measured Channel 1 Load Transient (VIN = 12V, VOUT1 = 1.5V)

Figure 3. Measured Efficiency on Channel 2 (VOUT2 = 1.2V, fSW = 400kHz, Channel 1 Disabled)

Figure 5. Measured Channel 2 Load Transient (VIN = 12V, VOUT2 = 1.2V)

1663 F04

VOUT1AC-COUPLED

20MHz BW100mV/DIV

IOUT1 0A TO 4A STEP

3.3A/DIV

1663 F05

VOUT2AC-COUPLED

20MHz BW100mV/DIV

IOUT2 0A TO 4A STEP

3.3A/DIV

Figure 6. Measured Output Voltage Ripple at 12V Input, 1.5V and 1.2V Output, 8A Per Channel with Standard Demo Circuit Default Setup

LOAD CURRENT (A)0

EFFI

CIEN

CY (%

)

64 53

1663 F02

95

90

21 87

85

80

75

60

70

65

5VIN9VIN12VIN15VIN18VIN

LOAD CURRENT (A)0

EFFI

CIEN

CY (%

)

5 6 743

1663 F03

95

90

21 8

85

80

75

60

70

65

5VIN9VIN12VIN15VIN18VIN

1663 F06

1.5V OUTPUTAC-COUPLED

20MHz BW50mV/DIV

1.2V OUTPUT AC-COUPLED

20MHz BW50mV/DIV

5dc1663af

DEMO MANUAL DC1663A

PARTS LISTITEM QUANTITY REFERENCE-DESCRIPTION DESCRIPTION MANUFACTURER’S PART NUMBER

Required Circuit Components

1 4 CIN2, CIN3, CIN4, CIN5 Cap., X5R, 10µF, 35V, 10%, 1210 Murata, GRM32ER6YA106KA12

2 2 COUT1, COUT7 Cap., 470µF, 4V, POSCAP, F8 Sanyo, 4TPE470MCL

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

4 2 C5, C7 Cap., X5R, 0.1µF, 25V, 10%, 0603 AVX, 06033D104KAT

5 4 R1, R3, R22, R26 Res., Chip, 10, 1%, 0603 NIC, NRC06F10R0TRF

6 1 R19 Res., Chip, 60.4k, 1%, 0603 Vishay, CRCW060360K4FKED

7 1 R25 Res., Chip, 40.2k, 1%, 0603 Vishay, CRCW060340K2FKED

8 1 R30 Res., Chip, 100k, 1%, 0603 Vishay, CRCW0603100KFKED

9 1 U1 IC, High Efficiency Step-Down Module Linear Technology LTM4628EV

Additional Demo Board Circuit Components

1 1 CIN1 Cap., 150µF, 35V, Aluminum Electr., Sun Electronics, 35CE150AX

2 0 COUT2, COUT3, COUT6, COUT8 Cap., X5R, 100µF, 6.3V, 20% 1210 Optional AVX, 12106D107MAT2A Optional

3 0 C1 Cap., X7R, 1µF, 25V,10%, 0805 Optional AVX, 08053C105KAT2A Optional

4 1 C2 Cap., X7R, 1µF, 25V,10%, 0805 AVX, 08053C105KAT2A

5 0 C3, C4, C6, C8 to C12 Cap., 0603, Optional Optional

6 0 R2, R4, R6, R8, R16, R20, R40 Res., 0603, Optional Optional

7 0 R11, R14, R17, R23, R28, R31, R33, R39

Res., Chip, 0, 1%, 0603, Optional Vishay, CRCW06030000Z0ED, Optional

8 4 R5, R24, R27, R36 Res., Chip, 10k, 1%, 0603 Vishay, CRCW060310K0FKED

9 2 C13, C14 Cap., X7R, 0.01µF, 16V, 10%, 0603 AVX, 0603YC103KAT2A

10 2 C15, C16 Cap., X7R, 1µF, 10V, 10%, 0603 AVX, 0603ZC105KAT

11 4 R7, R21, R29, R32 Res., Chip, 0, 1%, 0603 Vishay, CRCW06030000Z0ED

12 4 R9, R10, R13, R15 Res., Chip, 60.4k, 1%, 0603 Vishay, CRCW060360K4FKED

13 1 R12 Res., Chip, 30.1k, 1%, 0603 Vishay, CRCW060330R1FKED

14 1 R18 Res., Chip, 90.9k, 1%, 0603 Vishay, CRCW060390K9FKED

15 1 R34 Res., Chip, 0.001Ω, 0.5W, 2010 Vishay, WSL20101L000FEA

16 0 R35 Res., 2010, Optional Optional

17 1 R37 Res., Chip, 0.015Ω, 2W, 2512 Vishay, WSL2512R0150FEA

18 0 R38 Res., 2512, Optional Optional

19 1 Q1 N-Channel 30-V MOSFET Vishay, SUD50N03-09P

20 10 TP1 to TP5, TP10 to TP15 Testpoint, Turret, .094" pbf Mill-Max, 2501-2-00-80-00-00-07-0

21 4 TP18, TP20, TP22, TP23 Testpoint, Turret, .094" pbf Mill-Max, 2501-2-00-80-00-00-07-0

22 6 TP6, TP7, TP8, TP9, TP17, TP19 Jack Banana Keystone, 575-4

Hardware - for Demo Board Only

1 2 JP1, JP6 Header 4 Pin 0.079 Single Row Samtec, TMM104-02-L-S

2 3 JP2, JP3, JP4 Header 3 Pin 0.079 Single Row Samtec, TMM103-02-L-S

3 1 J5 Header 3 Pin 0.079 Double Row Samtec, TMM-103-02-L-D

4 6 XJP1 to XJP6 Shunt, .079" Center Samtec, 2SN-BK-G

5 3 J1, J2, J3 CON., SMA , PCB, Jack Amphenol Connex, 132134

6 4 Stand-Off Stand-Off, Nylon 0.50" Keystone, 8833 (Snap On)

6dc1663af

DEMO MANUAL DC1663A

SCHEMATIC DIAGRAMS5 5

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JP1

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TP5

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R16

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TP19

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JP3

OFF

RU

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VINJ9 VINJ10 VINJ11 VINK2 VINK3 VINK4 VINK9 VINK10 VINK11

VIN

M2

VIN

M3

VIN

M4

VIN

M5

VIN

M6

VIN

M7

VIN

M8

VIN

M9

VIN

M10

VIN

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VINL2 VINL3 VINL4 VINL5 VINL6 VINL7 VINL8 VINL9

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DIF

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TF8

DIFFN E9

DIFFP E8

FSET C6

PHASMD G4

GND A6GND A7GND B6GND B7GND D1GND D2GND D3GND D4GND D9GND D10GND D11GND D12GND E1GND E2GND E3GND E4GND E10GND E11GND E12GND F1GND F2GND F3GND F10GND F11GND F12GND G1

GND G10GND G12GND H1GND H2

GN

DH

3G

ND

H4

GN

DH

5G

ND

H6

GN

DH

7G

ND

H9

GN

DH

10G

ND

H11

GN

DH

12G

ND

J1G

ND

J5G

ND

J8G

ND

J12

GN

DK1

GN

DK5

GN

DK6

GN

DK7

GN

DK8

GN

DK1

2G

ND

L1G

ND

L12

GN

DM

1G

ND

M12

SGN

DC

7SG

ND

D6

SGN

DF6

SGN

DF7

SGN

DG

6SG

ND

G7

VOU

T1B1

VOU

T1B2

VOU

T1B3

VOU

T1B4

VOU

T1B5

VOU

T1C

1VO

UT1

C2

VOU

T1C

3VO

UT1

C4

CO

MP2

E7

PGO

OD

2G

8SW

2G

11

VFB2

D7

TRAC

K2D

8R

UN

2F9

VOU

TS2

C8

TEMPJ6

MODE-PLLINF4

CLKOUTG5

INTVCCH8

EXTVCCJ7

VOUT2A8VOUT2A9VOUT2A10VOUT2A11VOUT2A12VOUT2B8VOUT2B9VOUT2B10VOUT2B11VOUT2B12VOUT2C9VOUT2C10VOUT2C11VOUT2C12

GND G3

TP2

EXTV

CC

TP2

EXTV

CC

CIN

310

uF35

V12

10

CIN

310

uF35

V12

10

R15

60.4

KR

1560

.4K

R32 0R32 0

R1

10R1

10

C6

OPT

C6

OPT

TP15

TP15

CIN

210

uF35

V12

10

CIN

210

uF35

V12

10

R21

0R21

0

CO

UT4

100u

F6.

3V12

10

CO

UT4

100u

F6.

3V12

10

TP1

CLK

OU

T

TP1

CLK

OU

T

R7

0R7

0

CO

UT8

OPT

1210

CO

UT8

OPT

1210

C1

OPT

C1

OPT

R22

10R22

10

TP9

TP9

C2

1uF

C2

1uF

R20

OPT

R20

OPT

TP3

TP3

R2

OPT

R2

OPT

R6

OPT

R6

OPT

R24 10K

R24 10K

C12

OPTC12

OPT

R27

10K

R27

10K

+C

OU

T747

0uF

4V

+C

OU

T747

0uF

4V

CIN

510

uF35

V12

10

CIN

510

uF35

V12

10

JP2

OFF

RU

N1

JP2

OFF

RU

N1 13 2

R5

10K

R5

10K

TP4

CLK

IN TP4

CLK

IN

R8

OPTR

8O

PT

C11

OPT

C11

OPT

JP6

JP6

1 32

4

R18

90.9

KR

1890

.9K

TP14

TRAC

K2TP

14TR

ACK2

R9

60.4

KR

960

.4K+

CIN

115

0uF

35V

+C

IN1

150u

F35

V

TP12

TP12

TP21

SW1

TP21

SW1

R12

30.1

KR

1230

.1K

C8

OPT

C8

OPT

TP22

PGO

OD

1TP

22PG

OO

D1

R26 10

R26 10

JP4SO

FT-S

TAR

TTR

ACK

JP4SO

FT-S

TAR

TTR

ACK

13 2TP10

TP10

CO

UT5

100u

F6.

3V12

10

CO

UT5

100u

F6.

3V12

10

R13

60.4

KR

1360

.4K

R29 0R29 0

TP16

SW2

TP16

SW2

R25

40.2

KR

2540

.2K

R4

OPT

R4

OPT

7dc1663af

DEMO MANUAL DC1663A

SCHEMATIC DIAGRAMS5 5

4 4

3 3

2 2

1 1

DD

CC

BB

AA

OPT

ION

AL J

UM

PER

FO

R 1

OU

TPU

T C

ON

FIG

UR

ATIO

N

DIF

F SE

NSI

NG

SEL

ECTI

ON

VOU

T1

LOAD

TRA

NSIE

NT C

IRCU

IT

VOU

T2

TEM

PIN

TVC

C

RU

N1

RU

N2

TRAC

K1TR

ACK2

VFB1

VFB2

CO

MP1

CO

MP2

VO2-

DIF

FN

VO2+

DIF

FP

VOU

T1S

VOU

T1

VOU

T2S

DIF

FOU

T

VOU

T1VO

UT2

SIZE

DA

TE:

IC N

O.

REV.

SHEE

TO

F

TITL

E:

APP

ROVA

LS

PCB

DES

.

APP

EN

G.

TEC

HN

OLO

GY

Fax:

(408

)434

-050

7

Milp

itas,

CA

950

35Ph

one:

(408

)432

-190

0

1630

McC

arth

y Bl

vd.

LTC

Con�

dent

ial-F

or C

usto

mer

Use

Onl

y

CUST

OM

ER N

OTI

CELI

NEA

R TE

CHN

OLO

GY

HA

S M

AD

E A

BES

T EF

FORT

TO

DES

IGN

ACI

RCU

IT T

HA

T M

EETS

CU

STO

MER

-SU

PPLI

ED S

PECI

FICA

TIO

NS;

HO

WEV

ER, I

T RE

MA

INS

THE

CUST

OM

ER'S

RES

PON

SIBI

LITY

TO

VERI

FY P

ROPE

R A

ND

REL

IABL

E O

PERA

TIO

N IN

TH

E A

CTU

AL

APP

LICA

TIO

N.

COM

PON

ENT

SUBS

TITU

TIO

N A

ND

PRI

NTE

DCI

RCU

IT B

OA

RD L

AYO

UT

MA

Y SI

GN

IFIC

AN

TLY

AFF

ECT

CIRC

UIT

PERF

ORM

AN

CE O

R RE

LIA

BILI

TY.

CON

TACT

LIN

EAR

TECH

NO

LOG

Y A

PPLI

CATI

ON

S EN

GIN

EERI

NG

FO

R A

SSIS

TAN

CE.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O L

INEA

R TE

CHN

OLO

GY

AN

D

SCH

EMA

TIC

SUPP

LIED

FO

R U

SE W

ITH

LIN

EAR

TECH

NO

LOG

Y PA

RTS.

SCA

LE =

NO

NE

ww

w.li

near

.com 1

Tues

day,

Sep

tem

ber 0

7, 2

010

22

HIGH

EFF

ICIE

NCY,

DUA

L 8A

STE

P-DO

WN

uMO

DULE

REG

ULAT

OR

AK

JEFF

Z.

N/A

LTM

4628

EVD

EMO

CIR

CUIT

166

3ASI

ZE

DA

TE:

IC N

O.

REV.

SHEE

TO

F

TITL

E:

APP

ROVA

LS

PCB

DES

.

APP

EN

G.

TEC

HN

OLO

GY

Fax:

(408

)434

-050

7

Milp

itas,

CA

950

35Ph

one:

(408

)432

-190

0

1630

McC

arth

y Bl

vd.

LTC

Con�

dent

ial-F

or C

usto

mer

Use

Onl

y

CUST

OM

ER N

OTI

CELI

NEA

R TE

CHN

OLO

GY

HA

S M

AD

E A

BES

T EF

FORT

TO

DES

IGN

ACI

RCU

IT T

HA

T M

EETS

CU

STO

MER

-SU

PPLI

ED S

PECI

FICA

TIO

NS;

HO

WEV

ER, I

T RE

MA

INS

THE

CUST

OM

ER'S

RES

PON

SIBI

LITY

TO

VERI

FY P

ROPE

R A

ND

REL

IABL

E O

PERA

TIO

N IN

TH

E A

CTU

AL

APP

LICA

TIO

N.

COM

PON

ENT

SUBS

TITU

TIO

N A

ND

PRI

NTE

DCI

RCU

IT B

OA

RD L

AYO

UT

MA

Y SI

GN

IFIC

AN

TLY

AFF

ECT

CIRC

UIT

PERF

ORM

AN

CE O

R RE

LIA

BILI

TY.

CON

TACT

LIN

EAR

TECH

NO

LOG

Y A

PPLI

CATI

ON

S EN

GIN

EERI

NG

FO

R A

SSIS

TAN

CE.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O L

INEA

R TE

CHN

OLO

GY

AN

D

SCH

EMA

TIC

SUPP

LIED

FO

R U

SE W

ITH

LIN

EAR

TECH

NO

LOG

Y PA

RTS.

SCA

LE =

NO

NE

ww

w.li

near

.com 1

Tues

day,

Sep

tem

ber 0

7, 2

010

22

HIGH

EFF

ICIE

NCY,

DUA

L 8A

STE

P-DO

WN

uMO

DULE

REG

ULAT

OR

AK

JEFF

Z.

N/A

LTM

4628

EVD

EMO

CIR

CUIT

166

3ASI

ZE

DA

TE:

IC N

O.

REV.

SHEE

TO

F

TITL

E:

APP

ROVA

LS

PCB

DES

.

APP

EN

G.

TEC

HN

OLO

GY

Fax:

(408

)434

-050

7

Milp

itas,

CA

950

35Ph

one:

(408

)432

-190

0

1630

McC

arth

y Bl

vd.

LTC

Con�

dent

ial-F

or C

usto

mer

Use

Onl

y

CUST

OM

ER N

OTI

CELI

NEA

R TE

CHN

OLO

GY

HA

S M

AD

E A

BES

T EF

FORT

TO

DES

IGN

ACI

RCU

IT T

HA

T M

EETS

CU

STO

MER

-SU

PPLI

ED S

PECI

FICA

TIO

NS;

HO

WEV

ER, I

T RE

MA

INS

THE

CUST

OM

ER'S

RES

PON

SIBI

LITY

TO

VERI

FY P

ROPE

R A

ND

REL

IABL

E O

PERA

TIO

N IN

TH

E A

CTU

AL

APP

LICA

TIO

N.

COM

PON

ENT

SUBS

TITU

TIO

N A

ND

PRI

NTE

DCI

RCU

IT B

OA

RD L

AYO

UT

MA

Y SI

GN

IFIC

AN

TLY

AFF

ECT

CIRC

UIT

PERF

ORM

AN

CE O

R RE

LIA

BILI

TY.

CON

TACT

LIN

EAR

TECH

NO

LOG

Y A

PPLI

CATI

ON

S EN

GIN

EERI

NG

FO

R A

SSIS

TAN

CE.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O L

INEA

R TE

CHN

OLO

GY

AN

D

SCH

EMA

TIC

SUPP

LIED

FO

R U

SE W

ITH

LIN

EAR

TECH

NO

LOG

Y PA

RTS.

SCA

LE =

NO

NE

ww

w.li

near

.com 1

Tues

day,

Sep

tem

ber 0

7, 2

010

22

HIGH

EFF

ICIE

NCY,

DUA

L 8A

STE

P-DO

WN

uMO

DULE

REG

ULAT

OR

AK

JEFF

Z.

N/A

LTM

4628

EVD

EMO

CIR

CUIT

166

3A

R36

10K

R36

10K

TP23IOST

EP C

LK

TP23IOST

EP C

LK

J3IO

STEP

J3IO

STEP

R23

OPTR23

OPT

R39

OPT

R39

OPT

C13

0.01

uFC

130.

01uF

R35

OPT

2010

R35

OPT

2010 Q

1SU

D50

N03

-09P

Q1

SUD

50N

03-0

9P

2

1

34

R14

OPT

R14

OPT

J1J1C

140.

01uF

C14

0.01

uF

R11

OPT

R11

OPT

R34

1mO

Hm

0.5W

2010

R34

1mO

Hm

0.5W

2010

R28

OPT

R28

OPT

R38

OPT

2512

R38

OPT

2512

R33

OPT

R33

OPT

R17

OPT

R17

OPT

C16

1uF

C16

1uF

R40

OPT

R40

OPT

C15

1uF

C15

1uF

R31

OPTR31

OPT

J2J2

R37

0.01

52W 25

12

R37

0.01

52W 25

12

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.

8dc1663af

DEMO MANUAL DC1663A

Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2010

LT 0910 • 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 direc-tive 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

Copyright © 2004, Linear Technology Corporation