1
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
DESCRIPTION
LTC3838EUHF-1/
LTC3838EUHF-2
High Current, Dual Output
Synchronous Buck Converter
Demonstration circuits DC1997A-A/DC1997A-B are
dual output synchronous buck converters featuring the
LTC
®
3838EUHF-1/LTC3838EUHF-2. Both assemblies
provide two outputs of 1.5V/20A and 1.2V/20A over an
input voltage range of 4.5V to 14V at a switching frequency
of 300kHz.
Applications requiring the output to be adjusted with an
external reference can be implemented with the DC1997A-B
assembly. Such applications include adaptive voltage scal-
ing optimization (AVSO) where the processor voltage is
adjusted to achieve optimal efficiency, wide output voltage
applications controlled by a DAC, or margining. The 2nd
channel of the DC1997A-B assembly is regulated to an
onboard 1.2V reference in the default setup. The same
reference can be set from 0.8V to 1.5V with a potentiometer
or the 2nd channel can regulate to a source external to the
board. The 1st channel on the DC1997A-B assembly and
both channels on the DC1997A-A version are regulated
to the internal reference. 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.
The entire converter, excluding the bulk input and output
capacitors, fits within a 1.5in2 area on the board. The high
density is a result of the compact, 2-sided drop-in layout
and the use of dual channel FETs.
Additional features of this demo board include:
• Remote sensing for each output.
• PLLIN and CLKOUT pins.
• PGOOD, RUN and TRK/SS pins for each output.
• Optional resistors to tie the two outputs together.
• Optional footprint for discrete single channel FETs for
higher output current.
• Optional footprints to implement DTR (detect transient)
to reduce overshoot following a load release.
Design files for this circuit board are available at
http://www.linear.com/demo
PERFORMANCE SUMMARY
Specifications are at TA = 25°C, No Airflow
PARAMETER CONDITION VALUE
Minimum Input Voltage 4.5V
Maximum Input Voltage 14V
Output Voltage VOUT1 IOUT1 = 0A to 20A, VIN = 4.5V to 14V 1.5V ± 2%
Output Voltage VOUT2 IOUT2 = 0A to 20A, VIN = 4.5V to 14V 1.2V ± 2%
VOUT1 Maximum Output Current, IOUT1 VIN = 4.5V to 14V, VOUT1 = 1.5V 20A
VOUT2 Maximum Output Current, IOUT2 VIN = 4.5V to 14V, VOUT2 = 1.2V 20A
Nominal Switching Frequency 300kHz
Efficiency (Measured on DC1997A-B Assembly)
See Figure 2 VOUT1 = 1.5V, IOUT1 = 20A, VIN = 12V 90.4% Typical
VOUT2 = 1.2V, IOUT2 = 20A, VIN = 12V 88.8% Typical
2
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
QUICK START PROCEDURE
Demonstration circuit DC1997A-A/DC1997A-B is easy to
set up to evaluate the performance of the LTC3838EUHF-1/
LTC3838EUHF-2. Please refer to Figure 1 for proper mea-
surement 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 be 0V. For both assemblies, place
the jumpers in the following positions:
JP4 RUN1 ON
JP1 RUN2 ON
JP2 MODE FCM
The DC1997A-B assembly has additional jumpers for the
reference circuit. Place these jumpers in the following
positions:
JP5 ON BD REF FIXED
JP6 REF ON BD
2. Adjust the input voltage to be between 4.5V and 14V.
VOUT1 should be 1.5V ± 2%.
VOUT2 should be 1.2V ± 2%.
3. Next, apply 20A load to each output and re-measure
VOUT.
4. Once the DC regulation is confirmed, observe the output
voltage ripple, load step response, efficiency and other
parameters.
Note 1: Use the BNC connectors labeled VOUT1 or VOUT2
to measure the output volt-age ripple.
Note 2: Do not connect load from the VO1_SNS+ turret
to the VO1_SNS- turret or from the VO2_SNS+ turret to
the VO2_SNS- turret. This could damage the converter.
Only apply load across the stud connectors on the edge
of the board.
Reference Circuit for Channel 2 of DC1997A-B
Assembly
Channel 2 of the DC1997A-B assembly is configured by
default to regulate to the fixed 1.2V reference generated
by the LT
®
6650 reference circuit. If desired, this reference
can be set with a potentiometer, or an external source such
as a DAC or another source. See the following instructions
to set the board for either:
Adjusting the Onboard Reference:
1. Remove power from the input of the board.
2. Place these jumpers in the following positions:
JP5 ON BD REF ADJ
JP6 REF ON BD
3. Apply power to the input of the board.
4. Adjust reference with potentiometer at R52.
Connecting a Reference External to the Board:
1. Remove power from the input of the board.
2. Place JP6 in the EXT position.
3. Connect the external reference between the EXTREF2+
and EXTREF2- turrets.
4. Apply power to the input of the board.
5. Turn-on the external reference.
Note 3: For accurate efficiency measurements in DCM at
light load at VIN greater than 5V, remove R51 and apply
an external reference to the board as mentioned above.
Single Output/Dual Phase Operation
A single output/dual phase converter may be preferred
for higher output current applications. The optional com-
ponents required to tie the phases together are found on
the top middle of the first sheet. To tie the two outputs
together, make the following modifications:
1. Tie the two VOUT shapes together with a piece of copper
at the edge of the board where the copper is exposed.
2. Tie the VOUT SENSE1+ pin to INTVCC with a 0Ω jumper
at R8. This will tie ITH1 to ITH2 inside the chip.
3. Tie RUN1 to RUN2 by stuffing a 0Ω jumper at R15.
4. If DTR is implemented, then stuff 0Ω jumper at R9 to
tie the two DTR pins together.
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dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
QUICK START PROCEDURE
Dynamic Load Circuit (Optional)
Demonstration circuit DC1997A-A/DC1997A-B provides
a simple load-step circuit consisting of a MOSFET and
sense resistor for each rail. To apply a load step, follow
the steps below.
1. Pre-set the amplitude of a pulse generator to 0.0V and
the duty cycle to 5% or less.
2. Connect the scope to the VOUT BNC connectors for
the rail under test with a coax cable. To monitor the
load-step current, connect the scope probe across the
ISTEP+/- turrets for that rail.
3. Connect the output of the pulse generator to the PULSE
turret for the rail under test and connect the return to
the adjacent GND turret.
4. With the converter running, slowly increase the am-
plitude of the pulse generator output to provide the
desired load step pulse height. The scaling for the load
step signal is 5mV/Amp.
Figure 1. Proper Measurement Equipment Setup
A
VOUT2
LOAD
IOUT2
IIN
+
–
A
VOUT1
LOAD
IOUT1 +
–
V
+–
V
+–
VOUT2*
VOUT1*
DC1997A F01
VIN
SUPPLY
*MONITOR THE OUTPUT VOLTAGE ACROSS
EITHER COUT2 OR COUT7 FOR ACCURATE
EFFECIENCY MEASUREMENTS
VIN
+
–
V
+
–
A
4
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
QUICK START PROCEDURE
Figure 4. Efficiency Curves for VOUT2 on the DC1997A-B
Assembly at Different Output Voltage Settings
Figure 6. 50% to 100% to 50% Load Step Response
of the 1.2V Rail on the DC1997A-A Assembly
Figure 5. 50% to 100% to 50% Load Step Response
of the 1.5V Rail on the DC1997A-A Assembly
Figure 7. 50% to 100% to 50% Load Step Response
of the 1.5V Rail on the DC1997A-B Assembly
VOUT2 of the LTC3838-2 Demo Board
Adjusted with External Reference
LOAD CURRENT (A)
0
EFFICIENCY (%)
85
90
95
1.2V
20
DC1997A F04
80
75
70 510 15 25
BOTH RAILS:
MOSFET = INFINEON BSC0911ND (DUAL)
L = WÜRTH 7443330047
0.47µH, DCR = 0.8mΩ ±10%
RSENSE = 1mΩ
0.8V
FCM, VIN = 12V, fSW = 300kHz
1.6V
1.5VO(AC)
50mV/DIV
LOAD STEP
5A/DIV
20µs/DIV
20A
10A
COUT = 2× SANYO 2R5TPE330M9, 100µF X5R 1206
L = WÜRTH 7443330047 (0.47µH)
fSW = 300kHz
DC1997A F05
109mV
LOAD CURRENT (A)
0
EFFICIENCY (%)
85
90
95
1.5V
1.2V
20
DC1997A F02
80
75
70 510 15 25
BOTH RAILS:
MOSFET = INFINEON BSC0911ND (DUAL)
L = WÜRTH 7443330047
0.47µH, DCR = 0.8mΩ ±10%
RSENSE = 1mΩ
FCM, VIN = 12V, fSW = 300kHz
LOAD CURRENT (A)
0.001 0.01 0.1 1 10 100
40
EFFICIENCY (%)
50
60
70
80
DC1997A F03
30
20
10
0
90
100
1.5V RAIL FCM
1.2V RAIL FCM
1.5V RAIL DCM
1.2V RAIL DCM
BOTH RAILS:
MOSFET = INFINEON
BSC0911ND (DUAL)
L = WÜRTH 7443330047
0.47µH, DCR = 0.8mΩ ±10%
RSENSE = 1mΩ
FCM AND DCM
VIN = 12V
fSW = 300kHz
Figure 2. Efficiency Curves for the 1.5V Rail and 1.2V
Rail of the DC1997A-B Assembly in FCM at VIN = 12V
Figure 3. Efficiency Curves for the 1.5V Rail and 1.2V Rail
of the DC1997A-B Assembly in FCM and DCM at VIN = 12V
LTC3838-2 1.5V/20A and 1.2V/20A Converter LTC3838-2 1.5V/20A and 1.2V/20A Converter
1.2VO(AC)
50mV/DIV
LOAD STEP
5A/DIV
20µs/DIV
20A
10A
COUT = 2× SANYO 2R5TPE330M9, 100µF X5R 1206
L = WÜRTH 7443330047 (0.47µH)
fSW = 300kHz
DC1997A F06
102mV 1.5VO(AC)
50mV/DIV
LOAD STEP
5A/DIV
20µs/DIV
20A
10A
COUT = 2× SANYO 2R5TPE330M9, 100µF X5R 1206
L = WÜRTH 7443330047 (0.47µH)
fSW = 300kHz
DC1997A F07
109mV
5
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
QUICK START PROCEDURE
Figure 8. 50% to 100% to 50% Load Step Response
of the 1.2V Rail on the DC1997A-B Assembly
Figure 9. Turn-On of the 1.5V Rail of the DC1997A-A
Assembly. RUN Pin Released from Ground
Figure 10. Turn-On of the 1.2V Rail of the DC1997A-A
Assembly. RUN Pin Released from Ground
Figure 11. Turn-On of the 1.5V Rail of the DC1997A-B
Assembly. RUN Pin Released from Ground
Figure 12. Turn-On of the 1.2V Rail of the DC1997A-B
Assembly. RUN Pin Released from Ground
1.2VO(AC)
50mV/DIV
LOAD STEP
5A/DIV
20µs/DIV
20A
10A
COUT = 2× SANYO 2R5TPE330M9, 100µF X5R 1206
L = WÜRTH 7443330047 (0.47µH)
fSW = 300kHz
DC1997A F08
97mV
RUN1
2V/DIV
VOUT1
TRACK/SS1
500mV/DIV
2ms/DIV
CSS = 10nF
VIN = 12V, FULL LOAD
DC1997A F09
RUN2
2V/DIV
VOUT2
TRACK/SS2
500mV/DIV
2ms/DIV
CSS = 10nF
VIN = 12V, FULL LOAD
DC1997A F10
RUN1
2V/DIV
VOUT1
TRACK/SS1
500mV/DIV
2ms/DIV
CSS = 10nF
VIN = 12V, FULL LOAD
DC1997A F11
RUN2
2V/DIV
VOUT2
TRACK/SS2
500mV/DIV
2ms/DIV
EXTVREF
500mV/DIV
CSS = 4.7nF
VIN = 12V, FULL LOAD
DC1997A F12
6
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
PARTS LIST–DC1997A-A
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 C12 CAP X7R 470pF 16V 5% 0603 AVX 0603YC471JAT2A
2 2 C21, C22 CAP X5R 10µF 16V,10% 0805 MURATA GRM21BR61C106KE15L
3 2 C3, C16 CAP NPO 1000pF 25V 5% 0603 AVX 06033A102JAT2A
4 3 C4, C10, C14 CAP X5R 0.1µF 16V 10% 0603 AVX 0603YD104KAT2A
5 2 C5, C11 CAP NPO 47pF 16V 5% 0603 AVX,0603YA470JAT2A
6 1 C6 CAP X7R 330pF 16V 0603 AVX 0603YC331JAT2A
7 2 C7, C13 CAP X5R 0.01µF 16V 10% 0603 AVX 0603YD103KAT2A
8 1 C8 CAP X5R 4.7µF 16V,10% 0805 AVX 0805YD475KAT2A
9 2 C9, C18 CAP X5R 1µF 16V,10% 0603 AVX 0603YD105KAT2A
10 4 CIN1, CIN2, CIN3, CIN4 CAP X5R 22µF 16V 1210 AVX 1210YD226MAT2A
11 1 CIN6 CAP 180µF 16V SVP-F8 SANYO 16SVP180MX
12 4 COUT1, COUT2, COUT6, COUT7 CAP X5R 100µF 6.3V 20% 1206 MURATA GRM31CR60J107ME39L
13 4 COUT4, COUT5, COUT9, COUT10 CAP 330µF 2.5V SIZE 7343 SANYO 2R5TPE330M9
14 2 D1, D2 DIODE SCHOTTKY SOD-323 CENTRAL SEMI. CMDSH-4E TR
15 2 L1, L2 IND 0.47µH 0.8mΩ DCR WÜRTH 7443330047
16 2 Q1, Q2 MOSFET 5mm x 6mm POWER STAGE INFINEON BSC0911ND
17 2 R13, R45 RES 100k 1% 0603 VISHAY CRCW0603100KFKEA
18 6 R2, R11, R19, R44, R4, R12 RES 10k 1% 0603 VISHAY CRCW060310K0FKEA
19 1 R27 RES CHIP 11k 1% 0603 VISHAY CRCW060311K0FKEA
20 2 R29, R31 RES 2.2Ω 1% 0603 VISHAY CRCW06032R20FKEA
21 1 R30 RES 133k 1% 0603 VISHAY CRCW0603133KFKEA
22 2 R32, R40 RES 15k 1% 0603 VISHAY CRCW060315K0FKEA
23 12 R5, R17, R21, R23, R25, R35, R38, R41,
R42, R50, R14, R24 RES 0Ω,0603 VISHAY CRCW06030000Z0EA
24 4 R6, R7, R46, R48 RES 10Ω 1% 0603 VISHAY CRCW060310R0FKED
25 2 RS1, RS2 RES 0.001Ω 1W 1% 2512 VISHAY WSL25121L000FEA
26 1 U1 LTC3838EUHF-1 QFN 38-LEAD LINEAR TECH. LTC3838EUHF-1
7
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
PARTS LIST–DC1997A-A
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Additional Circuit Components
1 0 C1, C2, C15, C17, C19, C23, C24 CAP 0603 OPT
2 0 C20 CAP 0805 OPT
3 0 CIN5 CAP SVP-F8 OPT
4 0 CIN7-CIN12 CAP OPT 1210 OPT
5 0 COUT3, COUT8, COUT11-COUT14 CAP OPT 7343 OPT
6 0 D3 DIODE SOD-323 OPT
7 0 E19, E20 TESTPOINT TURRET 0.095" OPT
8 0 JP5, JP6 HEADER OPT 2MM SINGLE 3-PIN OPT
9 2 Q11, Q12 MOSFET N-CH 30V TO-252 FAIRCHILD FDD8874
10 0 Q3-Q10 MOSFET LFPAK OPT
11 0 R1, R3, R8, R9, R10, R15, R16, R18,
R20, R22, R26, R28, R33, R34, R36,
R37, R39, R43, R47, R49, R63
RES 0603 OPT
12 0 R51, R53, R54, R59, R60, R61, R62 RES 0603 OPT
13 0 R52 RES POT-3313J-1 OPT
14 2 R55, R56 RES 10k 1% 0603 VISHAY CRCW060310K0FKEA
15 2 R57, R58 RES 0.005Ω 1/2W 1% 2010 VISHAY WSL20105L000FEA
16 0 U2 LT6650HS5 SOT23-5 OPT
Hardware
1 6 J1-J6 STUD TEST PIN PEM KFH-032-10
2 12 J1-J6 NUT BRASS #10-32 ANY
3 6 J1-J6 RING LUG #10 KEYSTONE 8205
4 6 J1-J6 WASHER TIN PLATED BRASS ANY
5 2 J7,J8 CONN BNC 5 PINS CONNEX 112404
6 2 JP1, JP4 HEADER 2MM SINGLE 3-PIN SAMTEC TMM-103-02-L-S
7 2 JP2, JP3 HEADER 2MM SINGLE 4-PIN SAMTEC TMM-104-02-L-S
8 4 XJP1-XJP4 SHUNT SAMTEC 2SN-BK-G
8
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
PARTS LIST–DC1997A-B
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 C12 CAP X7R 470pF 16V 5% 0603 AVX 0603YC471JAT2A
2 2 C21, C22 CAP X5R 10µF 16V 10% 0805 MURATA GRM21BR61C106KE15L
3 2 C3, C16 CAP NPO 1000pF 25V 5% 0603 AVX 06033A102JAT2A
4 3 C4, C10, C14 CAP X5R 0.1µF 16V 10% 0603 AVX 0603YD104KAT2A
5 2 C5, C11 CAP NPO 47pF 16V 5% 0603 AVX,0603YA470JAT2A
6 1 C6 CAP NPO 680pF 16V 0603 AVX 0603YC681JAT2A
7 1 C13 CAP X5R 0.01µF 16V 10% 0603 AVX 0603YD103KAT2A
8 1 C7 CAP X7R 4.7nF 10V 0603 AVX 0603ZC472JAT2A
9 1 C8 CAP X5R 4.7µF 16V,10% 0805 AVX 0805YD475KAT2A
10 2 C9, C18 CAP X5R 1µF 16V,10% 0603 AVX 0603YD105KAT2A
11 4 CIN1, CIN2, CIN3, CIN4 CAP X5R 22µF 16V 1210 AVX 1210YD226MAT2A
12 1 CIN6 CAP 180µF 16V SVP-F8 SANYO 16SVP180MX
13 4 COUT1, COUT2, COUT6, COUT7 CAP X5R 100µF 6.3V 20% 1206 MURATA GRM31CR60J107ME39L
14 4 COUT4, COUT5, COUT9, COUT10 CAP 330µF 2.5V SIZE 7343 SANYO 2R5TPE330M9
15 2 D1, D2 DIODE SCHOTTKY SOD-323 CENTRAL SEMI. CMDSH-4E TR
16 2 L1, L2 IND 0.47µH 0.8mΩ DCR WÜRTH 7443330047
17 2 Q1, Q2 MOSFET 5mm x 6mm POWER STAGE INFINEON BSC0911ND
18 3 R13, R24, R45 RES 100k 1% 0603 VISHAY CRCW0603100KFKEA
19 4 R2, R11, R19, R44 RES 10k 1% 0603 VISHAY CRCW060310K0FKEA
20 1 R27 RES CHIP 5.23k 1% 0603 VISHAY CRCW06035K23FKEA
21 2 R29, R31 RES 2.2Ω 1% 0603 VISHAY CRCW06032R20FKEA
22 1 R30 RES 133k 1% 0603 VISHAY CRCW0603133KFKEA
23 2 R32, R40 RES 15k 1% 0603 VISHAY CRCW060315K0FKEA
24 13 R5, R17, R21, R23, R25, R35, R38, R41,
R42, R50, R59, R61, R62 RES 0Ω, 0603 VISHAY CRCW06030000Z0EA
25 4 R6, R7, R46, R48 RES 10Ω 1% 0603 VISHAY CRCW060310R0FKED
26 2 RS1, RS2 RES 0.001Ω 1W 1% 2512 VISHAY WSL25121L000FEA
27 1 U1 LTC3838EUHF-2 QFN 38-LEAD LINEAR TECH. LTC3838EUHF-2
9
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
PARTS LIST–DC1997A-B
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Additional Circuit Components
1 0 C1, C2, C15, C17 CAP 0603 OPT
2 1 C19 CAP X5R 1µF 16V 0603 AVX 0603YD105KAT2A
3 1 C20 CAP X5R 4.7µF 16V 0805 AVX 0805YD475KAT2A
4 1 C23 CAP X5R 1µF 16V 0603 AVX 0603YD105KAT2A
5 1 C24 CAP X5R 0.01µF 16V 0603 AVX 0603YD103KAT2A
6 0 CIN5 CAP SVP-F8 OPT
7 0 CIN7-CIN12 CAP OPT 1210 OPT
8 0 COUT3, COUT8, COUT11-COUT14 CAP OPT 7343 OPT
9 1 D3 DIODE BZT52C5V6S 5.6V ZENER SOD-323 DIODES BZT52C5V6S-7-F
10 2 Q11, Q12 MOSFET N-CH 30V TO-252 FAIRCHILD FDD8874
11 0 Q3-Q10 (OPT) MOSFET LFPAK OPT
12 0 R1, R3, R8, R9, R10, R15, R16, R18,
R20, R22, R26, R28, R33, R34, R36,
R37, R39, R43, R47, R49, R63
RES 0603 OPT
13 0 R4, R12, R14 RES 0603 OPT
14 1 R51 RES CHIP 10k 1% 0603 VISHAY CRCW060310K0FKEA
15 1 R52 RES POT 20k 1% POT-3313J-1 BOURN 3313J-1-203E
16 1 R53 RES 20k 0.1% 0603 VISHAY PTN0603E2002BST1
17 1 R54 RES 10k 0.1% 0603 VISHAY PTN0603E1002BSTS
18 2 R55, R56 RES 10k 1% 0603 VISHAY CRCW060310K0FKEA
19 2 R57, R58 RES 0.005Ω 1/2W 1% 2010 VISHAY WSL20105L000FEA
20 1 R60 RES CHIP 6.65k 0.1% 0603 VISHAY PTN0603E6651BSTS
21 1 U2 LT6650HS5 SOT23-5 LINEAR TECH. LT6650HS5
Hardware
1 2 E19, E20 TESTPOINT TURRET 0.095" MILL-MAX 2501-2-00-80-00-00-07-0
2 26 E1-E7, E9, E11-E28 TESTPOINT TURRET 0.095" MILL-MAX 2501-2-00-80-00-00-07-0
3 6 J1-J6 STUD TEST PIN PEM KFH-032-10
4 6 J1-J6 NUT BRASS #10-32 ANY
5 6 J1-J6 RING LUG #10 KEYSTONE 8205
6 12 J1-J6 WASHER TIN PLATED BRASS ANY
7 2 J7, J8 CONN BNC 5 PINS CONNEX 112404
8 2 JP1, JP4 HEADER 2MM SINGLE 3-PIN SAMTEC TMM-103-02-L-S
9 2 JP2, JP3 HEADER 2MM SINGLE 4-PIN SAMTEC TMM-104-02-L-S
10 2 JP5, JP6 HEADER 2MM SINGLE 3-PIN SAMTEC TMM-103-02-L-S
11 1 XJP1-XJP4 SHUNT SAMTEC 2SN-BK-G
12 1 XJP5,XJP6 SHUNT SAMTEC 2SN-BK-G
10
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
SCHEMATIC DIAGRAM
11
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
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
12
dc1997a-af
DEMO MANUAL
DC1997A-A/DC1997A-B
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 0113 • 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. LT C 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
