1dc2479aaf
DEMO MANUAL DC2479A-A
DESCRIPTION
LTM4650EY Dual Phase Single 50A
DC/DC μModule Regulator
Demonstration circuit 2479A-A features the LTM®4650EY, the high efficiency, high density, dual 25A, single 50A switch mode step-down power module regulator. The input voltage is from 4.5V to 15V. The output voltage is programmable from 0.6V to 1.8V. DC2479A-A is con-figured as dual-phase, single-output, which can deliver up to 50A maximum. The board designs with minimum components to demonstrate this high efficiency, high density µModule. As explained in the data sheet, output current de-rating is necessary for certain VIN, VOUT, and L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
BOARD PHOTO
thermal conditions. These features and the availability of the LTM4650EY in a compact 16mm × 16mm × 5.01mm BGA package make it ideal for use in many high-density point-of-load applications. The LTM4650 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2479A-A.
Design files for this circuit board are available at http://www.linear.com/demo/DC2479A-A
Figure 1. LTM4650/DC2479A-A Demo Board
2dc2479aaf
DEMO MANUAL DC2479A-A
QUICK START PROCEDUREDemonstration circuit DC2479A-A is easy to set up to evaluate the performance of the LTM4650EY. Please refer to Figure 1 for proper measurement setup and follow the procedure below:
1. With power off, connect the input power supply, load and meters as shown in Figure 2. Preset the load to 0A and VIN supply to 12V.
2. Turn on the power supply at the input. The output volt-age should be 1.0V ± 1.5% (0.985V~1.015V).
3. 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 can be measured at J6 with BNC cables.
4. (Optional) For optional load transient test, apply an adjustable pulse signal between “IOSTEP CLK” and “GND” test point. Pulse amplitude (3V~3.5V) sets the load step current amplitude. The output transient current can be monitored at the BNC connector J5 (10mV/A). The pulse signal should have very small duty cycle (< 10%) to limit the thermal stress on the transient load circuit.
PERFORMANCE SUMMARY Specifications are at TA = 25°C
PARAMETER CONDITIONS/NOTES VALUE
Input Voltage Range 4.5V ~ 15V
Output Voltage VOUT VIN = 4.5~15V, IOUT = 0~50A 1.0V ± 1.5% (0.985V ~ 1.015V)
Maximum Continuous Output Current De-Rating is Necessary for Certain VIN, VOUT and Thermal Conditions, See Data Sheet for Detail.
50A
Default Operating Frequency 500kHz
Efficiency VIN = 12V, VOUT = 1.0V, IOUT = 50A, fSW = 500 kHz 86.6%, See Figure 4
Load Transient VIN = 12V, VOUT = 1.0V, ISTEP = 25A to 37.5A < 60mVP-P, See Figure 5
3dc2479aaf
DEMO MANUAL DC2479A-A
QUICK START PROCEDURE+ –
LOAD (0A ~ 50A)1mΩ
VOUT
VIN 4.5V-15V
+ –
+– + –
+ –
dc2479aa F02
Figure 2. Test Setup of DC2479A-A
Figure 3. Measuring Output Voltage Ripple
+ –
VOUT GND
COUT
4dc2479aaf
DEMO MANUAL DC2479A-A
QUICK START PROCEDURE
70%
75%
80%
85%
90%
1 5 10 15 20 25 30 35 40 45 50
EFFI
CIEN
CY
LOAD CURRENT dc2479 F04
Figure 4. Efficiency vs Load Current at VIN = 12V, VO = 1V, fSW = 500kHz
Figure 5. Measured 25A – 37.5A Load Transient Response (VIN = 12V, VOUT = 1.0V, fSW = 500kHz)
VO (20MHz BW) [20mV/DIV, AC COUPLED]
25A-37.5A LOAD STEP
dc2479 F05
5dc2479aaf
DEMO MANUAL DC2479A-A
QUICK START PROCEDURE
Figure 6. Output Voltage Ripple at VIN = 12V, VOUT = 1V, IOUT = 50A, fSW = 500kHz
Figure 7. Thermal Performance at VIN = 12V, VOUT = 1V, IOUT = 50A, TA = 23.8°C, No Air Flow
VOUT (20MHz BW) [10mV/DIV
dc2479 F06
6dc2479aaf
DEMO MANUAL DC2479A-A
PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 CIN1 CAP., 150µF, 25V, Aluminum Electr., SUN ELECT., 25CE150AX
2 4 CIN2, CIN3, CIN4, CIN5 CAP., X5R, 22µF, 25V, 10%, 1210 MURATA, GRM32ER61E226KE15L
3 4 COUT2, COUT4, COUT6, COUT8 CAP., 470µF, 2.5V, POSCAP, F8 SANYO-D4D PANASONIC, 2R5TPF470M6L
4 1 C4 CAP., X5R, 2.2µF, 10V, 10%, 0603 MURATA, GRM188R61A225KE34D
5 1 C7 CAP., X5R, 0.1µF, 25V, 10%, 0603 AVX, 06033D104KAT2A
6 3 C8, C9, C10 CAP., X7R, 1µF, 10V,10%, 0603 AVX, 0603ZC105KAT2A
7 1 Q1 XSTR, SUD50N04-8M8P-4GE3 MOSFET VISHAY, SUD50N04-8M8P-4GE3
8 2 R1, R3 RES., 10, 1%,1/10W, 0603 VISHAY, CRCW060310R0FKEA
9 2 R2, R9 RES., 121k, 1%,1/10W, 0603 VISHAY,CRCW0603121KFKEA
10 2 R4, R18 RES., 10k, 1%,1/10W, 0603 VISHAY, CRCW060310K0FKEA
11 1 R11 RES., 1k, 1%,1/10W, 0603 VISHAY, CRCW06031K00FKEA
12 1 R16 RES., 0.01Ω, 1W, 2512 VISHAY, WSL2512R0100FEA
13 1 R19 RES., 90.9k, 1%,1/10W, 0603 VISHAY, CRCW060390K9FKEA
14 1 U1 LTM4650EY#PBF, 16×16×5.01 BGA LINEAR TECH., LTM4650EY#PBF
Additional Demo Board Circuit Components
1 8 COUT1, COUT3, COUT5, COUT7, COUT11, COUT12, COUT13, COUT14
CAP., X5R, 100µF, 6.3V, 20%,1210 AVX, 12106D107MAT2A
2 0 COUT9, COUT10 CAP., OPT, SANYO-D4D OPT
3 0 C1, C3, C5, C11 CAP., OPT, 0603 OPT
4 0 R8, R10 RES., OPT, 0603 OPT
5 2 R12, R14 RES., 0Ω,1/10W, 0603 VISHAY, CRCW06030000Z0EA
6 0 R13 RES., OPT, 0603 OPT
7 0 R20 RES., OPT, 2512 OPT
Hardware: For Demo Board Only
1 9 E1-E7, E17, E18 TESTPOINT, TURRET, .094" MILL-MAX, 2501-2-00-80-00-00-07-0
2 0 E8-E14 TESTPAD SMD TESTPAD SMD
3 1 JP1 HEADER, 3 PIN 2mm SINGLE ROW WURTH ELEKTRONIK, 620-003-111-21
4 2 J1, J3 JACK BANANA KEYSTONE, 575-4
5 2 J2, J4 STUD, TESTPIN PEM KFH-032-10
6 4 J2, J4 (×2) NUT, BRASS 10-32 ANY #10-32
7 2 J2, J4 RING, LUG #10 KEYSTONE #10
8 2 J2, J4 WASHER, TIN PLATED BRASS ANY #10
9 2 J5, J6 CONN, BNC, 5 PINS CONNEX 112404
10 1 XJP1 SHUNT 2mm WURTH ELEKTRONIK, 608-002-134-21
7dc2479aaf
DEMO MANUAL DC2479A-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 representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
5 5
4 4
3 3
2 2
1 1
DD
CC
BB
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: UNL
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330u
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11,13
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+
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-
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ISTO
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16
SIZE
DATE
:
IC N
O.RE
V.
SHEE
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TITL
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APP
RO
VA
LS
PCB
DES.
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ENG.
TECH
NOLO
GY
Fax:
(40
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4-05
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Milp
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CA
9503
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2-19
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1630
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(A/B
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ay 1
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11
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ST
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SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APP
RO
VA
LS
PCB
DES.
APP
ENG.
TECH
NOLO
GY
Fax:
(40
8)43
4-05
07
Milp
itas,
CA
9503
5Ph
one:
(40
8)43
2-19
00
1630
McC
arth
y Bl
vd.
LTC
CO
NF
IDE
NT
IAL
- FO
R C
US
TO
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R U
SE
ON
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CUST
OMER
NOT
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AR T
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BES
T EF
FORT
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MER-
SUPP
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SPE
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HOW
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MER'
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TO
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ROPE
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PERF
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RTE
CHNO
LOGY
APP
LICA
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S EN
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ERIN
G FO
R AS
SIST
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.
THIS
CIR
CUIT
IS P
ROPR
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O LI
NEAR
TEC
HNOL
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AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
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PART
S.SC
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2D
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CIR
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DC2
479A
(A/B
)Th
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ay, M
ay 1
2, 2
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11
HIG
H E
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CY, D
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PH
ASE,
SIN
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TPU
T
N/A
LTM
4650
EY /
LTM
4650
EY-1
ST
STEP
-DO
WN
PO
WER
M
OD
ULE
REG
ULA
TOR
LT
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APP
RO
VA
LS
PCB
DES.
APP
ENG.
TECH
NOLO
GY
Fax:
(40
8)43
4-05
07
Milp
itas,
CA
9503
5Ph
one:
(40
8)43
2-19
00
1630
McC
arth
y Bl
vd.
LTC
CO
NF
IDE
NT
IAL
- FO
R C
US
TO
ME
R U
SE
ON
LY
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
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IN T
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LAP
PLIC
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N. C
OMPO
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SUB
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LAYO
UT M
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PERF
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BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
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ERIN
G FO
R AS
SIST
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.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
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AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
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PART
S.SC
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CIR
CUIT
DC2
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(A/B
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ay 1
2, 2
016
11
HIG
H E
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CY, D
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PH
ASE,
SIN
GLE
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T
N/A
LTM
4650
EY /
LTM
4650
EY-1
ST
STEP
-DO
WN
PO
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M
OD
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REG
ULA
TOR
LT
+C
OU
T4
* 2.5V
C1 *
+C
OU
T2
* 2.5V
R20
OP
T25
12
CO
UT1
1
* 1210
C9 1u
F
CIN
522
uF25
V12
10
R19
90.9
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R13 *
E13
SW
1
R9
121K
1%
R14
0 O
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03
R11 1K
E18
GN
D
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VO
+
E12
PH
AS
MD
U1
VOUT1A1VOUT1A2VOUT1A3VOUT1A4VOUT1A5VOUT1B1VOUT1B2VOUT1B3VOUT1B4VOUT1B5VOUT1C1VOUT1C2VOUT1C3VOUT1C4
VFB1
D5
SW1
G2
PGO
OD
1G
9
CO
MP1
E6
RU
N1
F5
TRAC
K1E5
VOU
TS1
C5
VOU
T2A8
VOU
T2A9
VOU
T2A1
0VO
UT2
A11
VOU
T2A1
2VO
UT2
B8VO
UT2
B9VO
UT2
B10
VOU
T2B1
1VO
UT2
B12
VOU
T2C9
VOU
T2C1
0VO
UT2
C11
VOU
T2C1
2
VFB2
D7
SW2
G11
PGO
OD
2G
8
CO
MP2
E7
RU
N2
F9
TRAC
K2D8
VOU
TS2
C8
VIN
M2
VIN
M3
VIN
M4
VIN
M5
VIN
M6
VIN
M7
VIN
M8
VIN
M9
VIN
M10
VIN
M11
VIN
L2VI
NL3
VIN
L4VI
NL5
VIN
L6VI
NL7
VIN
L8VI
NL9
VIN
L10
VIN
L11
VINK2 VINK3 VINK4 VINK9 VINK10 VINK11
VINJ2 VINJ3 VINJ4 VINJ9 VINJ10 VINJ11
GN
DA6
GN
DA7
GN
DB6
GN
DB7
GN
DD1
GN
DD2
GN
DD3
GN
DD4
GN
DD9
GN
DD1
0G
ND
D11
GN
DD1
2G
ND
E1
GND E2GND E3GND E4GND E10GND E11GND E12GND F1GND F2GND F3GND F10GND F11GND F12GND G1GND G3GND G10GND G12GND H1GND H2GND H3GND H4GND H5GND H6GND H7GND H9GND H10GND H11GND H12
GND M12GND M1GND L12
GND J1GND J5GND J8GND J12GND K1GND K5GND K6GND K7GND K8GND K12GND L1
SGND C7SGND D6SGND F6SGND F7SGND G6SGND G7
FSET
C6
PHAS
MD
G4
DIF
FPE8
DIF
FNE9
CLKOUTG5
MODE-PLLINF4
TEMPJ6
INTV
CC
H8
EXTV
CC
J7
DIF
FOU
TF8
CO
UT1
* 6.3V
1210
JP1
1 32
+C
IN1
150u
F25
V
C10
1uF
CIN
322
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V12
10
C5 *
+C
OU
T6
* 2.5V
E11
EX
TVC
C
R1 10
E9
CLK
IN
E2
VIN
-
E6
RU
N
E14
SW
2
J4G
ND
R10
OP
T
R16
0.01
1W 2512
R8
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T
CO
UT1
2
* 1210
CIN
222
uF25
V12
10
J2
0.6
- 1.8
VV
OU
T
R4 10K
CO
UT3
* 6.3V
1210
C8
1uF
+C
OU
T9O
PT
E7 S
GN
D
CO
UT1
3
* 1210
+C
OU
T8
* 2.5V
E10C
LKO
UT
CIN
422
uF25
V12
10
E8TE
MP
J3
GN
D1
Q1
SU
D50
N04
-8M
8P
2
1
34
C11
OP
T
CO
UT1
4
* 1210
C7
0.1u
F
R2
121K
1%
E4
VO
-
J1V
IN1
E17
IOS
TEP
CLK
R3 10
E5
PG
OO
D
R18
10K
C4
2.2u
F10
V
CO
UT5
* 6.3V
1210
J6
E1
VIN
+
J5IO
STE
P
R12
0 O
hm
+C
OU
T10
OP
T
CO
UT7
* 6.3V
1210
C3
OP
T
8dc2479aaf
DEMO MANUAL DC2479A-A
Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2016
LT 0616 • 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 application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation