DC1878A - Demo Manual

DEMO MANUAL DC1878A
LTC3789EGN
8V to 75VIN Buck/Boost
DC/DC Converter
Description
Demonstration circuit 1878A features the LTC3789EGN,
a high efficiency switching step-up/down controller. The
input range has been extended to 75V by using a LTC44445 MOSFET driver on the input side. The minimum input
voltage is 8V. The output voltage is 12V. The board is
capable of delivering up to 5A of output current over the
input voltage range.
The LTC3789EGN is a high performance switching regulator controller designed to regulate the output using input
voltages above, below or equal to the output voltage.
Synchronous operation provides very high efficiency, up
to 97%. Constant frequency current mode architecture
allows phase-lockable frequency from 200kHz to 600kHz.
Performance Summary
PARAMETER
An accurate output current limit provides support for battery charging. A wide input and output range with smooth
transfer function through all operating modes makes the
product ideal for automotive, telecom and battery systems.
The MODE/PLLIN pin can select between pulse-skipping
mode and forced continuous mode operation and allows
the IC to be synchronized to an external clock. A power
good output pin indicates when the output is within 7.5%
of its set point.
Design files for this circuit board are available at
http://www.linear.com/demo
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.
(TA = 25°C)
CONDITIONS
Minimum Input Voltage
VALUE
8V
Maximum Input Voltage
75V
Output Voltage VOUT Regulation
VIN = 8V – 75V, IOUT = 0A – 5A
12V ± 2%
Maximum Continuous Output Current
Some Airflow May Be Needed at High Input Voltage and
Continuous Full Load
5A
Default Operating Frequency
R3 = 0Ω
200kHz
External Clock Synchronous Frequency Range
Efficiency
Load Transient
200kHz – 600kHz
VIN = 8V to 75V, IOUT = 5A
90.5% to 97%. See Figures 3 and 6
See Figure 5
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DEMO MANUAL DC1878A
Quick Start Procedure
Demonstration circuit 1878A is easy to set up to evaluate the performance of the LTC3789EGN. Please refer to
Figure 1 for proper measurement equipment setup and
follow the procedure below.
1.With power off, connect the input supply, load and
meters as shown in Figure 1. Preset the load to 0A and
VIN supply to 0V.
2.Set the current limit of the input supply high enough
so that the bench supply does not go into current limit
mode. Figure 2 shows input current as a function of
input voltage, at full load. Input current can reach 8A
at 8V input voltage.
3.Place jumper in the following position:
JP1
RUN
ON
4. Turn on the power at the input. Increase VIN to between
8V and 75V. The circuit will start and the output voltage
will regulate at 12V ±2%. The current draw at no load is
typically 18mA to 37mA depending on the input voltage.
Auxiliary Supply
The demo board DC1878A has a LTC3803 based flyback
converter to provide 8V/50mA bias voltage for LTC3789
and LTC4444-5. The snubber for the flyback primary winding provides a voltage that is above the input voltage. A
transistor Q9 is used to provide a small current source
to the top gate driver of LTC4444-5 so that 100% duty
cycle is possible.
If this current source is not used, for example if the flyback
auxiliary supply is replaced by an external 6V to 12V supply,
it is necessary to connect BOOST1 to 3.0V (add 3V Zener
diode D11, R11 = 1k, remove R16) and use a level shift
circuit (add D3 = BAS16, R12 = 1k, remove R6) between
TG1 and TINP (due to the 3.25V maximum threshold for
TINP). By setting BOOST1 to 3.0V, the LTC3789 will issue
narrow refresh pulses on BG1 which keeps the top gate
driver powered also in BOOST mode.
In addition, DC1878A demo board has layout for an optional
bias supply intended for a future monolithic high voltage
buck regulator. Additional information will be provided
when this part is released.
5. Apply load and observe output voltage regulation, ripple
voltage, efficiency and other parameters. Efficiency and
power loss at full load is shown in Figure 3. Continuous
operation with full power and high input voltage may
require some airflow.
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2
DEMO MANUAL DC1878A
quick start procedure
Figure 1. Proper Measurement Equipment Setup
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3
DEMO MANUAL DC1878A
CURRENT (A)
quick start procedure
10
9
8
7
6
5
4
3
2
1
0
IOUT
IIN
0
10
20
30
40
50
60
70
80
INPUT VOLTAGE (V)
100
8
98
7
η%
96
6
94
5
92
4
90
3
PLOSS
88
2
86
84
POWER LOSS (W)
EFFICIENCY (%)
Figure 2. Input Current at Full Load (12V at 5A Output)
1
0
10
20
30
40
50
60
70
80
0
INPUT VOLTAGE (V)
Figure 3. Efficiency and Power Loss at Full Load. The Power Loss is Highest at High Input
Voltage Due to the Switching Losses and Drops as Input Voltage Decreases, Until the Inductor
Current Starts to Increase as the Circuit Enters Boost Mode Below 10V Input Voltage
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4
DEMO MANUAL DC1878A
quick start procedure
100mV
Figure 4. Output Ripple Voltage Measured Across COUT1
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5
DEMO MANUAL DC1878A
quick start procedure
Figure 5. Load Transient Response
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6
DEMO MANUAL DC1878A
quick start procedure
100
99
98
97
96
EFFICIENCY (%)
95
94
8V
12V
16V
24V
36V
48V
60V
72V
76V
93
92
91
90
89
88
87
86
85
0
1
2
3
4
5
LOAD (A)
Figure 6. Efficiency at Various Input Voltages
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7
DEMO MANUAL DC1878A
quick start procedure
14
12
VOUT (V)
10
8
6
4
2
0
0
1
2
3
4
5
6
LOAD (A)
Figure 7. Output Current Limit (The Easiest Way to
Do This Test Is with an Active Load in Voltage Mode)
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8
DEMO MANUAL DC1878A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
1
1
CC1
CAP, 0603 470pF 10% 50V NPO
AVX 06035A471KAT
2
1
CC2
CAP, 0603 0.01µF 10% 50V X7R
AVX 06035C103KAT2A
3
0
CF1, C31, C32, C37, CF
CAP, 0603 OPTION
OPTION
4
0
CIN1, COUT11, CIN11, COUT21, CIN21
CAP, OPTION
OPTION
5
1
CIN2
CAP, 150µF 100V ELEC
SUN ELEC. 100ME150AX
6
1
COUT1
CAP, 330µF 20% 16V OSCON
SUN ELECT. 16SEP330M+T
7
0
COUT2
CAP, 330µF 20% 16V OSCON OPTION
SUN ELECT. 16SEP330M+T OPTION
8
1
CSS
CAP, 0603 4700pF 10% 50V X7R
AVX 06035C472KAT2A
9
2
C1,C2
CAP, 1210 22µF 10% 25V X5R
MURATA GRM32ER61E226KE15L
10
0
C3, C21, C23, C25, C27, C28
CAP, 1210 OPTION
OPTION
11
1
C4
CAP, 0603 0.22µF 10% 25V X7R
AVX 06033C224KAT2A
12
3
C5, C6, C9
CAP, 1210 2.2µF 10% 100V X7R
MURATA GRM32ER72A225KA35L
13
0
C7, C8, C29, C30, C33
CAP, 1210 2.2µF 10% 100V X7R OPTION
MURATA GRM32ER72A225KA35L OPTION
14
1
C10
CAP, 0603 4.7µF 20% 6.3V X5R
TAIYO YUDEN JMK 107 BJ457MA-T
15
1
C11
CAP, 0603 33pF 10% 50V NPO
AVX 06035A330KAT2A
16
0
C12, C13
CAP, 1206 OPTION
OPTION
17
3
C14, C16, C26
CAP, 0603 0.1µF 10% 50V X7R
AVX 06035C104KAT2A
18
1
C15
CAP, 0805 1µF 20% 16V X5R
AVX 0805YD105MAT2A
19
1
C17
CAP, 0603 1nF 10% 50V COG
AVX 06035A102KAT2A
20
2
C18, C20
CAP, 1206 10µF 20% 10V X7R
AVX 1206ZC106MAT2A
21
2
C19, C24
CAP, 0603 1µF 20% 16V X7R
AVX 0603YC105MAT2A
22
1
C22
CAP, 0603 0.22µF 20% 16V X7R
TAIYO YUDEN EMK107BJ224MA
23
0
C34
CAP, 0603 0.1µF 10% 50V X7R OPTION
AVX 06035C104KAT2A OPTION
24
0
C35
CAP, 0603 47nF 10% 25V X7R OPTION
AVX 06033C473KAT2A OPTION
25
0
C36
CAP, 1210 47µF 10% 10V X7R OPTION
MURATA GRM32ER71A476KE15L OPTION
26
3
D2, D9, D12
DIODE, SWITCHING, 200mW, SOT23
DIODES INC. BAS16
27
0
D3, D10, D11
DIODE, OPTION SOT-23
OPTION
28
2
D4, D14
DIODE, SWITCHING, 350mW, SOT23
DIODES INC. BAS21
29
1
D5
DIODE, SCHOTTKY
DIODES INC. B1100
30
1
D6
DIODE, SCHOTTKY, SMA
DIODES INC. B240A-13-F
31
1
D7
DIODE, SCHOTTKY
DIODES INC. DFLS160
32
1
D8
DIODE, ZENER, 5.1V, SOT23
DIODES INC. BZX84C5V1-7-F
33
1
D13
DIODE, ZENER, 6.8V, SOT23
DIODES INC. BZX84C6V8
34
1
D15
DIODE, 1.0A HIGH VOLTAGE SCHOTTKY
BARRIER RECTIFIER
DIODES INC. DFLS1100
35
1
JP1
HEADER, SINGLE ROW, 3 PIN, 2mm
SAMTEC TMM103-02-L-S
36
0
JP2
HEADER, SINGLE ROW, 3 PIN, 2mm
OPTION
SAMTEC TMM103-02-L-S OPTION
37
4
J1, J2, J3, J4
JACK, BANANA
KEYSTONE 575-4
38
1
L1
IND, 19µH
PULSE PA2050.193NL
39
0
L2
IND, 22µH OPTION
TDK VLF10040T-220M2R5 OPTION
40
4
MH1, MH2, MH3, MH4
STANDOFF, SNAP ON
KEYSTONE_8834
dc1878af
9
DEMO MANUAL DC1878A
parts list
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
41
1
Q1
XSTR, FDC2512 N-CHANNEL MOSFET
FAIRCHILD FDC2512
42
1
Q2
XSTR, MOSFET N-CHANNEL 100V
VISHAY SiR870DP
43
2
Q3, Q5
XSTR, MOSFET N-CHANNEL 20V
VISHAY SiR496DP-T1-GE3
44
1
Q4
XSTR, MOSFET N-CHANNEL 100V
VISHAY SiR882DP
45
1
Q6
XSTR, SMALL SIGNAL NPN SOT-23
DIODES INC. MMBTA42-7
46
0
Q8, Q13
XSTR, MOSFET N-CHANNEL 20V OPTION
VISHAY SiR496DP-T1-GE3 OPTION
47
1
Q9
XSTR, SMALL SIGNAL PNP SOT-23
DIODES INC. MMBTA92-7
48
0
Q14, Q15
XSTR, MOSFET N-CHANNEL 100V OPTION VISHAY SiR882DP OPTION
49
1
RC
RES, 0603 14.7kΩ 1% 1/10W
VISHAY CRCW060314K7FKEA
50
1
RFB1
RES, 0603 113kΩ 1% 1/10W
VISHAY CRCW0603113KFKEA
51
1
RFB2
RES, 0603 8.06kΩ 1% 1/10W
VISHAY CRCW06038K06FKEA
52
1
R1
RES, 0805 5.6Ω 1% 1/10W
VISHAY CRCW08055R60FKNEA
53
1
R2
RES, 3720 0.01Ω 2% 1W
THIN FILM RECH. RL3720WT-R010-F
54
3
R3, R4, R44
RES, 0603 100Ω 5% 1/10W
VISHAY CRCW0603100RJNEA
55
1
R5
RES, 0805 4.7Ω 1% 1/10W
VISHAY CRCW08054R70FKNEA
56
8
R6, R11, R16, R21, R25, R27, R32, R50 RES, 0603 0Ω JUMPER
VISHAY CRCW06030000Z0EA
57
3
R7, R15, R20
RES, 0603 100kΩ 1% 1/10W
VISHAY CRCW0603100KFKEA
58
2
R8, R26
RES, 0603 10Ω 5% 1/10W
VISHAY CRCW060310R0JNEA
59
2
R9, R10
RES, 0603 1kΩ 1% 1/10W
VISHAY CRCW06031K00FKEA
60
0
R12, R19, R22, R23, R33-R36, R51
RES, 0603 OPTION
OPTION
61
2
R13, R14
RES, 0603 154kΩ 1% 1/10W
VISHAY CRCW0603154KFKEA
62
0
R17
RES, 0805 0Ω JUMPER OPTION
VISHAY CRCW08050000Z0EA OPTION
63
1
R18
RES, 3720 0.012Ω 2% 1W
THIN FILM TECH. RL3720WT-R012-F
64
1
R24
RES, 0603 10kΩ 1% 1/10W
VISHAY CRCW060310K0FKEA
65
0
R28, R29
RES, 1206 OPTION
OPTION
66
1
R30
RES, 1206 64.9kΩ 1% 1/10W
VISHAY CRCW120664K9FKEA
67
1
R31
RES, 0603 12.1kΩ 1% 1/10W
VISHAY CRCW060312K1FKEA
68
1
R37
RES, 0603 14kΩ 1% 1/10W
VISHAY CRCW060314K0FKEA
69
1
R38
RES, 1206 220kΩ 5% 1/4W
VISHAY CRCW1206220KJNEA
70
1
R39
RES, 1206 100kΩ 1% 1/10W
VISHAY CRCW1206100KFKEA
71
1
R40
RES, 0603 22.1kΩ 1% 1/10W
YAGEO RC0603FR-0722KIL
72
1
R41
RES, 0603 1.58kΩ 1% 1/10W
VISHAY CRCW06031K58FKEA
73
1
R42
RES, 0603 10Ω 1% 1/8W
VISHAY CRCW060310R0FKEA
74
1
R43
RES, 1206 0.30Ω 1% 1/8W
IRC LR1206LF-01-R300-F
75
1
R45
RES, 0603 24.9kΩ 1% 1/10W
NIC NRC06F2492TRF
76
2
R46, R47
RES, 0603 33.2kΩ 1% 1/10W
VISHAY CRCW060333K2FKEA
77
1
R48
RES, 0603 5.6kΩ 1% 1/10W
VISHAY CRCW06035K49FKEA
78
0
R49, R55, R56
RES, 0603 0Ω JUMPER OPTION
VISHAY CRCW06030000Z0EA OPTION
79
0
R52
RES, 0603 2MΩ 1% 1/10W OPTION
VISHAY CRCW06032M00FKEA OPTION
80
0
R53
RES, 0603 102kΩ 1% 1/10W OPTION
VISHAY CRCW0603102KFKEA OPTION
81
0
R54
RES, 0603 11.3kΩ 1% 1/10W OPTION
VISHAY CRCW060311K3FKEA OPTION
82
4
TP1, TP2, TP3, TP7
TURRET
MILL-MAX 2308-2-00-80-00-00-07-0
dc1878af
10
DEMO MANUAL DC1878A
parts list
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
83
7
TP4, TP5, TP8, TP10, TP11-TP13
TURRET
MILL-MAX 2501-2-00-80-00-00-07-0
84
1
T1
XFMR, LOW POWER FLYBACK TRANS
PULSE PA0648NL
85
1
U1
IC, VOLT REG.
LINEAR TECH. LTC3789EGN
86
1
U2
IC, HIGH VOLTAGE SYNCHRONOUS
N-CHANNEL MOSFET DRIVER
LINEAR TECH. LTC4444EMS8E-5
87
1
U3
IC, CONSTANT FREQ. CURRENT MODE
FLYBACK DC/DC CONTROLLER
LINEAR TECH. LTC3803ES6-5
88
0
U4
IC, STEP-DOWN CONVERTER, MSE16(12), LINEAR TECH. FUTURE PRODUCT
4mm × 3mm OPTION
89
1
XJP1
SHUNT
SAMTEC 2SN-BK-G
90
0
XJP2
SHUNT OPTION
SAMTEC 2SN-BK-G OPTION
dc1878af
11
A
B
C
D
EXTVCC
PLLIN
SS
SGND
PGOOD
INTVCC
TP12
OFF
ON
VIN
TP10
TP5
TP11
TP4
TP8
2
JP1
3
64.9k
1206
RUN
1
R30
5
R31
12.1K
D8
BZX84C5V1
R24
10K
4700pF
CSS
R7
100k
INTVCC
RFB2
R25
0
R22
OPT
INTVCC
OPT
8.06K
CF1
1k 1%
R10
0.01uF
CC2
VIN
VOUT
R14
154k
1%
R20 100k 1%
C11
33pF
R35
OPT
R13
154k
1%
0
R21
4
OPT
R34
4.7uF
C10
14.7k 1%
RC
CC1 470pF
1k 1%
CF
OPT
R9
R15 100k 1%
RFB1
113K
VOS+
4
CIRCUITRY ON
THIS SIDE MUST
CONNECT TO
SIGNAL GND
GROUNDPLANE
NC
SW2
TG2
BOOST2
BG2
EXTVCC
INTVCC
VIN
BG1
PGND1
BOOST1
TG1
SW1
PGOOD
<------
IOSENSE-
IOSENSE+
ILIM
VOUTSNS
VINSNS
RUN
FREQ
MODE/PLLIN
SGND
ITH
SENSE1-
SENSE1+
SS
VFB
R36
OPT
14
13
12
11
10
9
8
7
6
5
4
3
2
1
U1
LTC3789EGN
OPT
D11
OPT
D3
0
OPT
R3
R4
100
100
R33 OPT
R26 10
C18
16V
R50
0 C22
0.22uF
3
R1 5.6
0805
BAS16
D2 1
0.1uF
C16
10uF 1206
D7
DFLS160
3
D10 VOUT
1uF
C24
0.1uF
OPT
INTVCC
R11 INTVCC
1
8V
R12
VAUX
INTVCC C14
3
R6 0
CIRCUITRY ON
THIS SIDE MUST
CONNECT TO
POWER GND
GROUNDPLANE
------>
15
16
17
18
19
20
21
22
23
24
25
26
27
28
TP13
VAUX
3
3
D9
BAS16
BAS21
U2
1
4
3
2
1
TS
TG
BG2
BG1
BG
NC
VCC BOOST
BINP
TINP
C4
SW1
CS
0.22uF
16V
Q4
SiR882DP
5
6
7
8
D5
B1100
C12
OPT
1206
R28
OPT
1206
C9
2.2uF
100V
1210
R18
0.012
2%
VIN
R5
4.7
0805
TG1
Q2
SiR870DP
SHT 2
B
LTC4444EMS8E-5
C15
1uF
16V
0805
D4
GND
9
1
12
3
5
2
R19
OPT
R32
0
Q5
SiR496DP
19uH
L1
SW2
TG2
R29
OPT
1206
C13
OPT
1206
2
0.010
2%
VOUT
C30
OPT
1210
+
CIN1
OPT
+
+
CS
SW2
TG2
BG2
BG1
SW1
TG1
C25
OPT
1210
C27
OPT
1210
VOUT
GND
GND
VIN
8V - 75V
VIN+
TAGE B.
APPROVED
CS
SW2
TG2
BG2
BG1
SW1
SHT 2
VOS-
GND
VOS+
12V / 5A MAX
TG1
C28
OPT
1210
TP1
J2
TP2
VOS+
J1
TP7
J4
J3
TP3
CIN2
150uF
100V
R8
10
DATE
10/28/11
1
DEMO CIRCUIT 1878A
LTC3789EGN
8V - 75V VIN BUCK-BOOST DC/DC
CONVERTER
TECHNOLOGY
C21
OPT
1210
VOUT1
C3
C23 COUT1 COUT2
OPT OPT 330uF 330uF
16V
1210 1210 16V
OPT
C29
OPT
1210
+
PRODUTION
1
REVISION HISTORY
DESCRIPTION
Tuesday, January 17, 2012
REV
C8
OPT
1210
R2
ECO
C7
OPT
1210
C1
22uF
25V
1210
D6
B240A
25V
1210
C2
22uF
VOUT1
C6
2.2uF
100V
1210
SiR496DP
Q3
C5
2.2uF
100V
1210
2
A
B
C
D
DEMO MANUAL DC1878A
Schematic Diagram
dc1878af
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.
A
B
C
OPT
C17
1
14k 1%
1.58k 1%
R37
SHT 1
CS
BG1
SW1
TG1
OPTIONAL PARTS
VAUX1
R41
5
3
22.1k 1% 1000pF
2
R40
C31
CS
SW1
Q15
SiR882DP
BG1
TG1
G
VIN
SNS
VCC
Q14
SiR870DP
VFB=0.8V
GND
ITH/RUN
U3
LTC3803ES6-5
4
5
6
R44
100
SHT 1
BG2
SW2
TG2
5.6k 1%
R48
D12
BAS16
Q8
3
SW2
Q13
SiR496DP
BG2
VIN
Q1
FDC2512
R43
0.30
1%
1206
VOUT1
4
SiR496DP
TG2
1uF 16V
C19
R38
220k
1206
1
VIN
2
1
3
VAUX1
6
D
C20
10uF
10V
1206
4
8
1
5
7
T1
2 PA0648NL
VIN 0.1uF
C26
R42 10 1%
BAS21
R46
33.2k
1%
R45
24.9k
1%
33.2k 1%
R47
3
0
R16
Q9
MMBTA92-7
CLAMPING SNUBBER/ 400uA SUPPLY
D14
DFLS1100
R27
0 D15
1
3
5
4
VAUX
R49
0
R51
OPT
R52
2M
1%
VIN
BIAS RUN
ON
JP2
OFF
R23
OPT
OPTIONAL BIAS SUPPY
B SHT 1
1
AUXILIARY SUPPLY
8V / 50mA
2
VIN
D13
R39
BZX84C6V8 100k 1%
Q6
1206
MMBTA42-7
C32
OPT
11
5
12
14
ISET
FBO
OV
RUN
C33
3
VIN
2.2uF
100V
1210
2
SS
VPRG2
VPRG1
VFB
SW
U4
FUTURE LTCXXXX
NC
2
4 NC
13 NC
15 NC
3
2
GND
3
8
16 GND
4
GND
17
5
10
6
7
9
1
C35
47nF
0
R56
0
R55
R54
11.3k
1%
R53
102k
1%
C37
OPT
C36
47uF
10V
1210
C34
0.1uF
R17
OPT
0805
VAUX
Thursday, December 08, 2011
1
DEMO CIRCUIT 1878A
LTC3789EGN
8V - 75V VIN BUCK-BOOST DC/DC
CONVERTER
TECHNOLOGY
TDK VLF10040
22uH
L2
1
A
B
C
D
DEMO MANUAL DC1878A
Schematic Diagram
dc1878af
13
DEMO MANUAL DC1878A
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
dc1878af
14 Linear Technology Corporation
LT 0312 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2012
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