Linear DC2117A Quick setup guide

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DEMO MANUAL DC2117A
DESCRIPTION
LTC3895EFE
High Input Voltage
Synchronous Buck Converter
Demonstration circuit 2117A is a single output high volt-
age nonisolated synchronous step-down converter that
drives all N-channel MOSFET power stage. It features the
LTC3895EFE, a high voltage step-down DC/DC controller
housed in a TSSOP-38 package with several pins removed
for high voltage spacing.
This DC2117A operates over an input voltage range from
14V to 130V, while the LT C
®
3895 can operate up to 150V.
This demo board produces a 12V output voltage with up to
a 5A output current, and is configured with a sense resistor
for over current protection and has optional DCR sensing.
To prevent high on-chip power dissipation in high input
voltage applications, the LTC3895 includes an NDRV pin
which drives the gate of an optional external N-channel
MOSFET acting as a low dropout linear regulator to supply
IC power and is an option on this board.
An internal charge pump allows for 100% duty cycle op-
eration in dropout, a useful feature when powered from
a battery during discharge. The LTC3895’s powerful 1Ω
L, 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.
PERFORMANCE SUMMARY
N-channel MOSFET gate drivers can be adjusted from
5V to 10V to enable the use of logic- or standard-level
MOSFETs to maximize efficiency. The EXTVCC pin permits
the LTC3895 to be powered from the output of the switch-
ing regulator or other available source, reducing power
dissipation and improving efficiency.
A mode selector allows the DC2117A to operate in forced
continuous operation, pulse-skipping or low ripple
Burst Mode
®
operation during light loads. Additional
features include a power good output signal, a PLLIN,
PHASEMD and CLKOUT for multiphase operation.
The LTC3895 data sheet gives a complete description of
the part, operation and application information and must
be read in conjunction with this demo board manual.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2117A
Specifications are at TA= 25°C
Table 1.
PARAMETER CONDITIONS UNITS
Input Voltage Range DC Up to 150VPK Transient 14V ~ 130V
Output Voltage VOUT VIN = 14~130V, IOUT = 0~5A, JP4: FCM 12V ± 2% (11.76V ~ 12.24V)
Maximum Output Current IOUT(MAX) VIN = 14~130V 5A
Default Operating Frequency (Typical) 150kHz
External Clock Sync Frequency Range 75kHz to 850kHz
Typical Full Load Efficiency (See Figure 4) VIN = 48V, VOUT = 12V, IOUT = 5A, fSW = 150kHz 94.9%
*Important Note: 60V or higher voltage can result in an electric shock if care is not taken. Also, hot plugging the circuit to a power supply that has more
than 40V present at its output can produce a high voltage transient exceeding the absolute maximum input voltage which can damage the DC2117A board.
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DEMO MANUAL DC2117A
QUICK START PROCEDURE
Demonstration circuit DC2117A is easy to set up to evalu-
ate the performance of the LTC3895EFE. Refer to Figure 1
for proper measurement equipment setup and follow the
procedure below:
NOTE. When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the input or output voltage
ripple by touching the probe tip directly across the VIN
or VOUT and GND terminals or directly across relevant
capacitor. See Figure 2 for proper scope probe technique.
1. Place jumpers in the following positions:
JP1 ON
JP4 FCM
JP5 ON
JP8 OFF
2. With power off, connect the input power supply to VIN
and GND.
3. Turn on the power at the input.
NOTE. Make sure that the input voltage is higher than
14V and does not exceed 130V.
4. Check the output voltage. The output voltage should
be between 11.76V and 12.24V.
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.
NOTE. If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
Figure 1. Proper Measurement Equipment Setup
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DEMO MANUAL DC2117A
QUICK START PROCEDURE
FREQUENCY SYNCHRONIZATION AND MODE SELECTION
100% DUTY
Table 2. Mode Selection and Synchronized Operation Options
CONFIGURATION JP4 MODE WITH SYNC SIGNAL SUPPLIED TO PLLIN
Forced Continuous Operation FCM FCM
Pulse-Skipping Operation PS PS
Burst Mode Operation with Adjustable Clamp Level BURST ADJ FCM
Burst Mode Operation with Default Clamp BURST DEFAULT FCM
Figure 2. Measuring Input or Output Ripple Across Terminals or Directly Across Ceramic Capacitor
Demonstration circuit 2117A’s mode selector allows the
converter to run in forced continuous operation, pulse-
skipping operation, Burst Mode operation or Burst Mode
operation with adjustable clamp level by changing the
position of JP4. To synchronize the DC2117A to an external
clock, apply the sync signal to the PLLIN turret. Depending
upon the JP4 setting, the DC2117A will operate in different
modes. See Table 2 for the detailed description.
+ –
V
OUT
GND
COUT
Demonstration circuit 2117A features 100% duty cycle
operation in dropout. Set the JP5 to ON position to activate
this feature. Set JP5 to OFF position disables the internal
charge pump and enables boost refresh, allowing for 99%
duty cycle operation in dropout.
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DEMO MANUAL DC2117A
OPTIONAL INDUCTOR DCR CURRENT SENSING
LOW QUIESCENT CURRENT APPLICATIONS AND MEASUREMENT
Demonstration circuit 2117A provides an optional circuit
for inductor DCR current sensing. Inductor DCR current
sensing uses the DCR of the inductor to sense the inductor
current instead of discrete sense resistors. Theadvantages
of DCR sensing are lower cost, reduced board space and
higher efficiency, but the disadvantage is a less accurate
current limit. If DCR sensing is used, be sure to select an
inductor current with a sufficiently high saturation current
or use an iron powder type material.
Refer to Table 3 for optional inductor DCR current sensing
setup and to the data sheet for more details.
Table 3. Optional Inductor DCR Current Sensing
CONFIGURATION RS1 R24 R28 C16 R37 R38 R39 R40
Current Sense
Resistor (Default)
Ref Sch Ref Sch Ref Sch OPEN OPEN OPEN OPEN OPEN
Inductor DCR Current
Sensing
0Ω Copper OPEN OPEN Calculated Value from Data Sheet 0Ω 0Ω
Thetypical quiescentcurrent(IQ) of the LTC3895controller
is 40µA in sleep mode as specified in the LTC3895 data
sheet. However, the input current of the DC2117A board
can be higher than this value because of additional circuit
Table 4. Low Input Quiescent Current Configuration
Reference Designator R1 R2 R23 JP3 JP4 JP5 JP8
Function OVLO PGOOD INTVCC Jumper MODE Selector 100% DUTY BIAS Supply
Stuffing Option OPEN 0Ω OPEN OPEN BURST ADJ or
BURST DEFAULT
OFF OFF
outside of the IC. To reduce the total input current, large
value FB divider resistors shouldbe used. In addition,some
jumpers and resistors should be configured accordingly.
Refer to Table 4 for the low input quiescent current setup.
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DEMO MANUAL DC2117A
EXTVCC BIAS SUPPLY
By default, the DC2117A EXTVCC turret is tied to the 12V
VOUT to save IC power loss.
To power the EXTVCC from onboard bias supply:
1. Leave the JP7 OPEN. This step disconnects the EXTVCC
from VOUT.
2. Keep the JP8 at the ON position. The onboard BIAS
supply output voltage is 12V.
Alternatively, EXTVCC can also be powered by an external
power supply:
1. Leave the JP7 OPEN.
2. Keep the JP8 at the OFF position.
3. Apply a DC voltage (<14V) between the EXTVCC and
GND turret, after the input voltage is established. Ensure
that EXTVCC ≤ VIN.
Figure 3. DC2117A VOUT Typical Efficiency vs Load Current
IOUT (A)
0
EFFICIENCY (%)
100
95
85
75
90
80
70
65
60
55
50 3.52.5 4.5
DC2117a F03
5
30.5 1 1.5 2 4
VIN = 48V
VIN = 130V
VIN = 72V
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DEMO MANUAL DC2117A
Figure 4. DC2117A VOUT 1.25A ~ 2.5A Load Transient at VIN = 48V
Figure 5. DC2117A VOUT 1.25A ~ 2.5A Load Transient at VIN = 130V
200µs/DIV
20MHz BW
100mV/DIV
DC2117a F04
VOUT
200µs/DIV
20MHz BW
100mV/DIV
DC2117a F05
VOUT
EXTVCC BIAS SUPPLY
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DEMO MANUAL DC2117A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 CIN1 CAP, 100μF 20% 200V ELEC NIC NRB-XS101M200V16x20TBF
2 5 CIN2, CIN3, CIN4, CIN5, C14 CAP, 1812 0.47μF 10% 200V X7R MURATA GRM43DR72E474KW01L
3 2 CIN6, CIN7 CAP, 1210 0.1μF 10% 200V X7R MURATA GRM32DR72D104KW01L
4 1 COUT1 CAP, 1210 22μF 10% 16V X7R TDK C3225X7R1C226K
5 2 COUT2, COUT3 CAP, 7343 150μF 20% 16V AVX TPSD157M016R0125
6 3 C2, C4, C13 CAP, 0603 0.1μF 10% 25V X7R TDK C1608X7R1E104K
7 1 C3 CAP, 0603 1nF 10% 50V X7R AVX 06035C102KAT2A
8 1 C6 CAP, 0603 4700pF 10% 50V X7R AVX 06035C472KAT2A
9 1 C7 CAP, 0603 1μF 20% 16V X7R TDK C1608X7R1C105M
10 1 C9 CAP, 0603 10pF 10% 50V X7R AVX 06035C100KAT2A
11 1 C10 CAP, 0603 100pF 5% 50V NPO AVX 06035A101JAT2A
12 1 C11 CAP, 1206 0.033μF 20% 200V VISHAY VJ1206Y333MXCAC
13 1 C12 CAP, 0603 4.7μF 20% 16V X5R TDK C1608X5R1C475M080AC
14 1 C15 CAP, 1210 4.7μF 20% 16V X7R AVX 1210YC475KAT2A
15 1 L1 IND, 33μH 15% WURTH ELEKTRONIK 7443633300
16 1 L2 IND, 470μH COILCRAFT MSS1048T-474KLB
17 1 L3 IND, 1.0μH VISHAY IHLP-1616BZER1R0M11
18 3 Q2, Q3, Q4 XSTR, N-CHANNEL DMOS FET INFINEON BSC520N15NS3G
19 1 RS1 RES, 2512 0.006Ω 5% 1/4W VISHAY WSL25126L000FEA18
20 1 R1 RES, 0603 191k 1% 1/10W VISHAY CRCW0603191KFKEA
21 1 R2 RES, 0603 1.74k 1% 1/10W VISHAY CRCW06031K74FKEA
22 8 R8, R10, R22, R24, R27, R28, R29, R35 RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA
23 1 R9 RES, 0603 10M 5% 1/10W VISHAY CRCW060310M0JNEA
24 1 R12 RES, 0603 2.2Ω 5% 1/10W VISHAY CRCW06032R20JNEA
25 1 R13 RES, 0603 10k 1% 1/10W VISHAY CRCW060310K0FKEA
26 1 R14 RES, 0603 10k 5% 1/10W VISHAY CRCW060310K0JNEA
27 1 R15 RES, 0603 140k 1% 1/10W VISHAY CRCW0603140KFKEA
28 3 R16, R17, R23 RES, 0603 100k 5% 1/10W VISHAY CRCW0603100KJNEA
29 1 R18 RES, 0603 49.9k 1% 0.1W VISHAY CRCW060349K9FKEA
30 1 R25 RES, 0603 30.1k 1% 1/10W VISHAY CRCW060330K1FKEA
31 1 R26 RES, 0603 80.6k 1% 1/10W VISHAY CRCW060380K6FKEA
32 2 R30, R36 RES, 0603 10Ω 1% 1/10W VISHAY CRCW060310R0FKEA
33 1 R31 RES, 0603 2M 1% 1/10W VISHAY CRCW06032M00FKEA
34 1 R32 RES, 0603 267k 1% 1/10W VISHAY CRCW0603267KFKEA
35 1 R34 RES, 0603 196k 1% 1/10W VISHAY CRCW0603196KFKEA
36 1 U1 IC, SYNCHRONOUS BUCK CONVERTER LINEAR TECH. LTC3895EFE
37 1 U2 IC, SYNCHRONOUS STEP-DOWN
REGULATOR
LINEAR TECH LTC3639EMSE
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DEMO MANUAL DC2117A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Additional Demo Board Circuit Components
1 0 CIN8 CAP, 1812 OPTION OPTION
2 0 COUT4 CAP, 7343 OPTION OPTION
3 0 C1, C5, C8, C16 CAP, 0603 OPTION OPTION
4 0 D1, D2 DIODE, OPTION OPTION
5 0 L1 – ALTERNATE IND, 33μH 15% WURTH ELEKTRONIK 7443643300
6 0 L4 IND, 22μH OPTION COILCRAFT SER2915H-223KL OPTION
7 0 Q1 XSTR, POWER OPTION
8 0 Q5 XSTR, NMOS OPTION OPTION
9 0 Q6, Q7 XSTR, OPTIMOS POWER -TRANSISTOR
OPTION
INFINEON IPD320N20N3 G OPTION
10 0 Q12, Q13 XSTR, OPTION OPTION
11 0 R3, R4, R5, R6, R7, R11, R19, R20, R21,
R37, R38, R39, R40
RES, 0603 OPTION OPTION
12 0 R33 RES, 1206 OPTION OPTION
Hardware
1 11 E2, E3, E4, E5, E6, E7, E8, E9, E10, E11, E12 TURRET MILL-MAX 2501-2-00-80-00-00-07-0
2 3 JP1, JP5, JP8 HEADER, 3-PIN, 2mm SULLINS NRPN031PAEN-RC
3 1 JP2 HEADER, 4-PIN 2mm SULLINS NRPN041PAEN-RC
4 3 JP3, JP6, JP7 HEADER, 2-PIN, 2mm SULLINS NRPN021PAEN-RC
5 1 JP4 HEADER, DOUBLE ROW 2mm × 4 2mm SULLINS NRPN042PAEN-RC
6 4 J1, J2, J3, J4 JACK, BANANA KEYSTONE 575-4
7 8 XJP1, XJP2, XJP3, XJP4, XJP5 SHUNT, 2mm SAMTEC 2SN-BK-G
8 4 XJP6, XJP7, XJP8, XJP6, XJP7, XJP8 STANDOFF, SNAP ON KEYSTONE_8833
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DEMO MANUAL DC2117A
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
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
A A B B C C D D
VOUT
GND
FCM P.S. BURST ADJ. BURST DEFAULT
7443633300
MSS104BT
3PROD 06/26/15 W_
4PROD - Parts addition 03/30/16 W_
EXTVCC
INTVCC
INTVCC
INTVCC
INTVCC
VIN
INTVCC
INTVCC
INTVCC
INTVCC
INTVCC
VIN
VIN
VIN
VIN
VOSP
VOSP
VIN
TG SW BG
SW
2SW
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
4
Tuesday, May 31, 2016
11
HIGH INPUT VOLTAGE SYNCHRONOUS
`\
W _A
N/A
LTC3895EFE
DEMO CIRCUIT 2117A
BUCK CONVERTER
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
4
Tuesday, May 31, 2016
11
HIGH INPUT VOLTAGE SYNCHRONOUS
`\
W _A
N/A
LTC3895EFE
DEMO CIRCUIT 2117A
BUCK CONVERTER
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
4
Tuesday, May 31, 2016
11
HIGH INPUT VOLTAGE SYNCHRONOUS
`\
W _A
N/A
LTC3895EFE
DEMO CIRCUIT 2117A
BUCK CONVERTER
REVISION HISTORY
DESCRIPTION DATE APPROVEDECO REV
W_
PROTO
105/28/13
REVISION HISTORY
DESCRIPTION DATE APPROVEDECO REV
W_
PROTO
105/28/13
REVISION HISTORY
DESCRIPTION DATE APPROVEDECO REV
W_
PROTO
105/28/13
R10
0
R36 10
1%
U1
LTC3895EFE
INTVCC 38
OVLO
1
VPRG
2
DRVSET
18
DRVUV
19 TG 20
NC
16
FREQ
17
PGOOD
14
RUN 34
PHASMD 36
SENSE1-
4
GND
39
BG 24
BOOST 22
PLLIN
13
SENSE1+
3
GND
12
NDRV 28
DRVCC 26
GND
9
MODE
8
EXTVCC 32
VIN 30
SS
5
VFB
6
ITH
7
CLKOUT
11
CPUMP_EN
10
ILIM 37
GND
15
SW 21
JP8
ON
OFF
VBIAS
1 3 2
R38
OPT
R11 OPT
E4
RUN
L3
1.0uH
E6
VIN-
JP7
C14
0.47uF
200V 1812
JP2
120 180
90
PHASE MD
1 3 2 4
C13 0.1uF
R31 2M 1%
Q2
BSC520N15NS3G
1
2
5
3
4
R29 0
R9 10M
R27
0
R5 OPT
E8
CLKOUT
R14 10k
COUT1
22uF
16V
1210
C3
1nF
J1
VIN
14V - 130V
E11
PGOOD
L1 33uH
C9 10pF
R37 OPT
R32 267k 1%
C1 OPT
RS1 0.006
2512
JP3
Q3 BSC520N15NS3G
1
2
5
3
4
JP4
MODE
1 2 3 4 5 6 7 8
JP6
C8 OPT
CIN4
0.47uF 200V
R21 OPT
C7
1uF
CIN6
0.1uF
200V
1210
E9
PLLIN
CIN5
0.47uF
200V
+
COUT2
150uF 16V
7343
Q1 OPT
23
1
R33 OPT R34
196k
R24 0
+
COUT3
150uF
16V
7343
R13
10K 1%
CIN3
0.47uF 200V
R17
100k
C16 OPT
R35
0
D1 OPT
C12
4.7uF
C5 OPT
L2 470uH
R25 30.1k
1%
R15
140k 1%
C2 0.1uF
C4
0.1uF
J2
GND
R16
100k
Q5
OPT
1
2
5
3
4
Q6 OPT
23
1
R28 0
R18
49.9k
1%
+
COUT4
OPT 7343
R40 OPT
R8 0
J4
GND
R12 2.2
R7
OPT
R3 OPT
R26
80.6k 1%
E12
EXTVCC
R4 OPT
E7
C6 4700pF
CIN8
OPT
200V
CIN2
0.47uF 200V
CIN7
0.1uF
200V
1210
R30 10
1%
R2 1.74k 1%
Q7 OPT
23
1
C11
0.033uF
200V
+
CIN1 100uF 200V
R39
OPT
JP1
ON OFF
RUN
1 3 2
E5
MODE
C10 100pF
D2 OPT
J3
VOUT
12V, 5A
R20 OPT
R1 191k 1%
R22 0
R23
100K
Q4
BSC520N15NS3G
1
2
5
3
4
E10
C15
4.7uF
16V
R19
OPT
E2
VIN
JP5
ON
OFF
100% DUTY
1 3 2
E3
SS
R6
OPT
U2
LTC3639EMSE
SW 1
NC
2
VIN
3
NC
4
FBO
5
VPRG1 7 VPRG2 6
GND
8
VFB 9
SS 10
ISET
11
OVLO
12
NC
13
RUN
14
NC
15
GND
16
GND
17
SENSE1- SENSE1+
SW TG
VOUT
SENSE1+ SENSE1-
EXTVCC
BG
SW
TG
BG
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DEMO MANUAL DC2117A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2016
LT 0616 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 application
engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
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