1
dc1543afa
DEMO MANUAL DC1543A
DESCRIPTION
LTM4641
38V, 10A, Step-Down µModule Regulator
with Advanced Input and Load Protection
Demonstration circuit 1543A features the LTM
®
4641, a
high efficiency, high density switch mode step-down power
μModule regulator with superior input and load protection
features. The input voltage range is from 4.5V to 38V. The
output voltage is jumper programmable from 0.8V to 6V
with a rated load current of 10A. Derating is necessary
for certain VIN, VOUT, frequency and thermal conditions.
DC1543A offers the TRACK/SS pin allowing the user to
program output tracking or soft-start period. The DC1543A
allows the user to enable/disable input undervoltage 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.
PERFORMANCE SUMMARY
BOARD PHOTO
protection; input latching/non-latching overvoltage protec-
tion; and latching/non-latching overtemperature protection.
Higher efficiency at low load currents is achieved by setting
the MODE pin jumper to DCM. The LTM4641 data sheet
must be read in conjunction with this demo manual prior
to working on or modifying demo circuit 1543A.
Design files for this circuit board are available at
http://www.linear.com/demo
PARAMETER CONDITIONS VALUE
Input Voltage Range 4.5V to 38V
Output Voltage VOUT Jumper Selectable 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 3.3V, 5V, 6V; ±1.5%
Maximum Continuous Output Current Derating is Necessary for Certain Operating Conditions.
See Data Sheet for Details.
10ADC
Default Operating Frequency RfSET = 680kΩ for VOUT = 0.8V, 1.0V, 1.2V, 1.5V, 1.8V;
RfSET = ∞ (Not Stuffed) for VOUT = 3.3V, 5.0V, 6.0V
255kHz (VOUT = 0.8V); 320kHz (VOUT = 1.0V);
385kHz (VOUT = 1.2V); 480kHz (VOUT = 1.5V);
575kHz (VOUT = 1.8V); 360kHz (VOUT = 3.3V);
550kHz (VOUT = 5.0V); 660kHz (VOUT = 6.0V);
Efficiency VIN = 12V, VOUT = 6V, IOUT = 10A 93.0% See Figure 2
Load Transient VIN = 12V, VOUT = 3.3V See Figure 3
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dc1543afa
DEMO MANUAL DC1543A
QUICK START PROCEDURE
Demonstration circuit 1543A is an easy way to evaluate
the performance of the LTM4641. Please refer to Figure
1 for proper measurement equipment setup and follow
the procedure below:
1. Place jumpers in the following positions for a typical
3.3VOUT application:
INPUT
OVLO
NON-LATCH INPUT
OVP
INPUT UVLO OVER-TEMP
BEHAVIOR
OFF OFF OFF NON-LATCH
RUN MODE TRACK/SS VOUT Select FSET
ON CCM SS 3.3V VOUT > 3.0V
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 be 0V.
3. Turn on the power at the input. Increase VIN to 12V
(Do not apply more than the rated maximum voltage
of 38V to the board or the part may be damaged).
The output voltage should be regulated and deliver the
selected output voltage ±1.5%.
4. Vary the input voltage from 4.5V to 38V and adjust
the load current from 0A to 10A. Observe the output
voltage regulation, ripple voltage, efficiency, and other
parameters. Output voltage ripple may be measured at
J6 with a BNC cable and oscilloscope. The probe channel
for VOUT should be set at 50Ω termination resistance
to match the BNC cable.
5. (Optional) For optional load transient test, apply an
adjustable pulse signal between IOSTEP_CLK and GND
test points. The pulse amplitude sets the load step cur-
rent amplitude. Keep the pulse width short (<1ms) and
pulse duty cycle low (<5%) to limit the thermal stress
on the load transient circuit. The load step current can
be monitored with a BNC connected to J5 (25mV/A).
6. (Optional) To test the advanced input and load pro-
tections, put the corresponding jumper in the “ON”
position. For DC1543A, the thresholds for different
input and output protections are set as shown below:
INPUT OVLO 36V
NON-LATCH INPUT OVP 32V
INPUT UVLO 8V for Rising Edge
7V for Falling Edge
OVER-TEMP
BEHAVIOR
LATCH 145°C
NON-LATCH 145°C: Cease Regulation
135°C: Resume Regulation
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dc1543afa
DEMO MANUAL DC1543A
QUICK START PROCEDURE
Figure 1. Proper Measurement Equipment Setup
+
–
LOAD
VIN
+
–
+
–
–
+
+
–
+–
Note: Demo circuit 1543A demonstrates a functional but outdated square
pad layout for LTM4641. Refer to the design files recommending round
pads for future PCB designs available at www.linear.com/demo.
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dc1543afa
DEMO MANUAL DC1543A
OUTPUT CURRENT (A)
0
40
60
EFFICIENCY (%)
90
85
80
75
70
65
50
55
45
95
1 6789102345
1.8VOUT, 325kHz
2.5VOUT, 335kHz
3.3VOUT, 360kHz
0.9VOUT, 235kHz
1.0VOUT, 255kHz
1.2VOUT, 285kHz
1.5VOUT, 315kHz
40
60
90
85
80
75
70
65
50
55
45
95
OUTPUT CURRENT (A)
0
EFFICIENCY (%)
1 6789102345
1.8VOUT, 325kHz
2.5VOUT, 335kHz
3.3VOUT, 360kHz
5.0VOUT, 550kHz
6.0VOUT, 660kHz
0.9VOUT, 235kHz
1.0VOUT, 255kHz
1.2VOUT, 285kHz
1.5VOUT, 315kHz
OUTPUT CURRENT (A)
0
EFFICIENCY (%)
1 6789102345
40
60
90
85
80
75
70
65
50
55
45
95
1.8VOUT, 325kHz
2.5VOUT, 335kHz
3.3VOUT, 360kHz
5.0VOUT, 550kHz
6.0VOUT, 660kHz
0.9VOUT, 235kHz
1.0VOUT, 255kHz
1.2VOUT, 285kHz
1.5VOUT, 315kHz
OUTPUT CURRENT (A)
0
EFFICIENCY (%)
1 6789102345
1.8VOUT, 325kHz
2.5VOUT, 335kHz
3.3VOUT, 360kHz
5.0VOUT, 550kHz
6.0VOUT, 660kHz
0.9VOUT, 235kHz
1.0VOUT, 255kHz
1.2VOUT, 285kHz
1.5VOUT, 315kHz
40
60
90
85
80
75
70
65
50
55
45
95
Efficiency vs Load Current at 6VIN
Efficiency vs Load Current at 12VIN
2a. VIN = 6V
2b. VIN = 12V
2c. VIN = 24V
2d. VIN = 36V
Efficiency vs Load Current at 24VIN
Efficiency vs Load Current at 36VIN
Figure 2. Measured DC1543A Efficiency at Different VIN, VOUT and fSW (CCM Mode Enabled)
Please refer to Table 1 in LTM4641 data sheet for the switching frequency at each output voltage.
QUICK START PROCEDURE
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dc1543afa
DEMO MANUAL DC1543A
QUICK START PROCEDURE
3a. VIN = 12V, VO = 3.3V, 0A to 4A Load Step
VIN = 24V, VOUT =6V, ILOAD = 10A, Ambient Temperature = 29.4°C, No Forced Air Flow
Figure 4. Thermal Image of LTM4641
Figure 3. Measured Load Transient Responses
VOUT: 50mV/DIV
IOUT_STEP: 4A/DIV
3b. VIN = 12V, VO = 1.0V, 0A to 4A Load Step
VOUT: 20mV/DIV
IOUT_STEP: 4A/DIV
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dc1543afa
DEMO MANUAL DC1543A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 2 CIN2, CIN1 CAP., Aluminum, 100μF, 50V SUN ELECT, 50CE100LX
2 2 CIN3, CIN4 CAP., X7R, 4.7μF, 50V, 10%, 1210 AVX, 12105C475KAT2A
3 3 CO1, CO2, CO8 CAP., POSCAP, 150μF, 10V, D3L SANYO, 10TPF150ML
4 3 CO3, CO4, CO5 CAP., X7R, 47μF, 10V, 10%, 1210 AVX, 1210ZC476KAT2A
5 1 C10 CAP., X5R, 3300pF, 50V, 10%, 0603 AVX, 06035C332KAT2A
6 1 R1 RES., CHIP, 13.7k, 1/16W, 1%, 0603 VISHAY, CRCW060313K7FKEA
7 2 R5, R7 RES., CHIP, 100k, 1/16W, 1%, 0603 VISHAY, CRCW0603100KFKEA
8 2 R13, R26 RES., CHIP, 2.49k, 1/16W, ±0.1%, 0603 VISHAY, TNPW06032K49BEEA
9 1 U1 I.C., LTM4641, BGA LINEAR TECH., LTM4641EY#PBF
Hardware/Components (For Demo Board Only)
1 1 C2 CAP., X7R, 4.7uF, 25V, 10%, 0805 MURATA, GRM21BR61E475KA12L
2 2 C8, C9 CAP., X5R, 8200pF, 50V, 10%, 0603 AVX, 06035C822KAT2A
3 1 R2 RES., CHIP, 680k, 1/16W, 1%, 0603 YAGEO, RC0603FR-07680KL
4 1 R15 RES., CHIP, 2.2M, 1/16W, 1%, 0603 VISHAY, CRCW06032M20FKEA
5 1 R17 RES., CHIP, 165k, 1/16W, 1%, 0603 VISHAY, CRCW0603165KFKEA
6 1 R18 RES., CHIP, 7.15k, 1/16W, 1%, 0603 VISHAY, CRCW06037K15FKEA
7 1 R19 RES., CHIP, 4.12k, 1/16W, 1%, 0603 VISHAY, CRCW06034K22FKEA
8 1 R20 RES., CHIP, 2.94k, 1/16W, 1%, 0603 VISHAY, CRCW06032K94FKEA
9 1 R21 RES., CHIP, 1.18k, 1/16W, 1%, 0603 VISHAY, CRCW06031K18FKEA
10 1 R22 RES., CHIP, 715, 1/16W, 1%, 0603 VISHAY, CRCW0603715RFKEA
11 1 R23 RES., CHIP, 576, 1/16W, 1%, 0603 VISHAY, CRCW0603576RFKEA
12 1 R25 RES., CHIP, 3.16k, 1/16W, 1%, 0603 VISHAY, CRCW06033K16FKEA
13 1 R28 RES., CHIP, 24.9k, 1/16W, 1%, 0603 VISHAY, CRCW060324K9FKEA
14 1 R10 RES., CHIP, 1.78M, 1/16W, 1%, 0603 VISHAY, CRCW06031M78FKEA
15 1 R24 RES., CHIP, 13k, 1/16W, 1%, 0603 VISHAY, CRCW06065K5KFKEA
16 1 R16 RES., CHIP, 1M, 1/16W, 1%, 0603 VISHAY, CRCW06031M00FKEA
17 1 R9 RES., CHIP, 187k, 1/16W, 1%, 0603 VISHAY, CRCW0603187KFKEA
18 2 R12, R8 RES., CHIP, 10, 1/16W, 1%, 0603 VISHAY, CRCW060310R0FKEA
19 3 R6, R31, R34 RES., CHIP, 0, 1/16W, 1%, 0603 VISHAY, CRCW06030000Z0EA
20 2 R3, R32 RES., CHIP, 10K, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA
21 2 RS2, RS1 RES., CHIP, 0.05Ω, 1W, 1% 2512 VISHAY, WSL2512R0500FEA
22 1 Q2 Silicon N-Channel MOSFET, POWERPAK-SO8 VISHAY, Si7164DP-T1-GE3
23 1 Q3 Silicon N-Channel Power MOSFET, LFPAK PHILPS, PH2625L
24 1 Q1 N-Channel 30-V MOSFET, TO-252 VISHAY, SUD50N03-09P-E3
25 0 C3, C4, C5, C6, C7(OPT) CAP., 0603
26 0 CIN5(OPT) CAP., 1210
27 0 R4, R27, R29, R33, R35, R36(OPT) RES., 0603
28 0 R11(OPT) RES., 1206
29 0 D2 (OPT) ZENER VOLTAGE REGULATOR, SOD-523 CENTRAL SEMI., CMOZ43V TR
Hardware
1 9 JP1-JP8, JP18 2mm SINGLE ROW HEADER, 2-PIN SAMTEC, TMM102-02-L-S
2 8 JP9-JP15, JP18 2mm SINGLE ROW HEADER, 3-PIN SAMTEC, TMM-103-02-L-S
3 3 JP4, JP9-JP15, JP17 SHUNT SAMTEC, 2SN-BK-G
4 2 J5, J6 CONN, BNC, 5 PINS CONNEX, 112404
5 4 J1-J4 JACK, BANANA KEYSTONE, 575-4
6 13 E2, E5-E8, E11, E12, E15-E20 TESTPOINT, TURRET, .095" MILL-MAX, 2501-2-00-80-00-00-07-0
7 1 JP16 Ultra-Small Tractile Switch PANASONIC, EVQPE105K
8 4 STAND OFF STAND-OFF, NYLON 0.50" tall KEYSTONE, 8833 (SNAP ON)
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dc1543afa
DEMO MANUAL DC1543A
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
A
A
B
B
A A
B B
IOSTEP
VOUT
Latch Clear
0.8V 1.2V 1.5V 1.8V 3.3V 5.0V 6.0V
VOUT
SELECT
OFF
ON
RUN
TRACK SS
DCM CCM
NON-LATCH LATCH
OFFON
INPUT
UVLO
INPUT
OVLO
NON-LATCH
INPUT OVP
OVER-TEMP
0.8V - 6V
@10A
10V 10V 10V 10V 10V
MODE
TRACK/SS
4.5V - 38V
ON OFF
ON OFF
DYNAMIC LOAD CIRCUIT
1.0V
BEHAVIOR
10V
FSET
OPT
OPT
WITH INPUT AND OUTPUT OVP
10A STEP-DOWN μMODULE REGULATOR
VOUT>3.0V
VOUT<=3.0V
2. ALL CAPACITORS ARE 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0603
CLK
R
INTVCC
VIN+
VINL
INTVCC
INTVCC
VINL
1VREF
1VREF
VO+
VO-
VO+
INTVCC
VO-
INTVCC
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
2
Monday, May 21, 2012
11
HZ
YAN L.
N/A
LTM4641EY
DEMO CIRCUIT 1543A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
2
Monday, May 21, 2012
11
HZ
YAN L.
N/A
LTM4641EY
DEMO CIRCUIT 1543A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
2
Monday, May 21, 2012
11
HZ
YAN L.
N/A
LTM4641EY
DEMO CIRCUIT 1543A
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
YAN L.PRODUCTION2 6-22-11
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
YAN L.PRODUCTION2 6-22-11
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
YAN L.PRODUCTION2 6-22-11
__
R3
10K
R3
10K
JP14JP14
1
2
3
R32 10KR32 10K
JP5JP5
R21
1.18K
R21
1.18K
+
CO8
150uF
+
CO8
150uF
TS2
SW
TS2
SW
E11
GND
E11
GND
JP10JP10
1
2
3
E12 VO+
E12 VO+
R15 2.2MR15 2.2M
E18
TRACK E18
TRACK
E2
DRVCC
E2
DRVCC
RS2 0.05
1% 2512
RS2 0.05
1% 2512
R25
3.16K
R25
3.16K
R34
0
R34
0
R9
187k
R9
187k
C7
OPT
C7
OPT
C8
8.2nF
C8
8.2nF
JP11JP11
1
2
3
R13
2.49K
0.1%
R13
2.49K
0.1%
JP2JP2
Q2
Si7164DP
Q2
Si7164DP
2
4
5
6
7
8
1
3
JP15JP15
1
2
3
CIN5CIN5
R5
100K
R5
100K J6J6
1
2
3
4
5
E8
VIN+ E8
VIN+
R20
2.94K
R20
2.94K
JP13JP13
1
2
3
JP17JP17
1
2
3
JP6JP6
Q1
SUD50N03-09P-E3
Q1
SUD50N03-09P-E3
1
2 3
E15 VO-
E15 VO-
+
CO1
150uF
+
CO1
150uF
R1
13.7K
R1
13.7K
R31
0
R31
0
RS1 0.05
1% 2512
RS1 0.05
1% 2512
R17
165K
R17
165K
+
CIN1
100uF
50V
+
CIN1
100uF
50V
E5
PGOOD
E5
PGOOD
R28
24.9K
R28
24.9K
E20
SGND E20
SGND
E6
TEMP
E6
TEMP
J3
VOUT
J3
VOUT
R35 (OPT)R35 (OPT)
J1
VIN J1
VIN
R4
(OPT)
R4
(OPT)
E16 VORB+
E16 VORB+
C3
(OPT)
C3
(OPT)
J4 GND
J4 GND
R33
(OPT)
R33
(OPT)
JP4JP4
R29
(OPT)
R29
(OPT)
CO4
47uF
1210
CO4
47uF
1210
J2
VIN-
J2
VIN-
CIN3
4.7uF
50V
1210
CIN3
4.7uF
50V
1210
R23
576
R23
576
JP7JP7
E7 IOSTEP
E7 IOSTEP
C5
100pF
C5
100pF
C10
3.3nF
C10
3.3nF
R11
(OPT)
R11
(OPT)
R2
680k
R2
680k
U1
LTM4641EY
U1
LTM4641EY
VINH
K7
VINL
J3
UVLO
B4
HYST
A4
OVLO
B5
IOVRETRY
A6
FSET J2
VOUT C9
VOSNS- H2
VORB- D2
CROWBAR B9
SGND
A3
SGND
A2
SGND
A1
GND
A7
1VREF C6
OVPGM B10
GND B6
OTBH
D3
SGND
B1 SGND
B2 SGND
B3 SGND
C1 SGND
C2 SGND
C3 SGND
C4
SGND
K1 SGND
K3 SGND
L3 SGND
M1 SGND
M2 SGND
M3
GND
A8
GND
A9
GND
A10
GND
A11
GND
A12
GND
B7
GND
B8
GND
B11
GND
B12
GND
C7
GND
C8
GND
D6
GND
D7
GND
D8
GND
E1
GND
E2
GND
E3
GND
E4
GND
E5
GND
E6
GND
E7
GND
E8
GND
F1
GND
F2
GND
F3
GND
F4
GND
F5
GND
F6
GND
F7
GND
F8
GND
F9
GND
F10
GND
F11
GND
F12
GND
G1
GND
G2
GND
G3
GND
G4
GND
G5
GND
G6
GND
G7
GND
G8
GND
G9
GND
G10
GND
G11
GND
G12
GND
H3
GND
H4
GND
H5
GND
H8 GND
H7 GND
H6
GND
H12 GND
H11 GND
H9
GND J5
GND J6
GND J7
GND J8
GND J12
GND J11
GND J10
GND J9
GND K5
GND K6
GND K12
GND K11
GND L4
GND L5
GND L6
GND M4
GND M5
GND M6
VOUT C10
VOUT C11
VOUT C12
VOUT D9
VOUT D10
VOUT D11
VOUT D12
VOUT E9
VOUT E10
VOUT E11
VOUT E12
VINH
K8
VINH
K9
VINH
K10
VINH
L7
VINH
L8
VINH
L9
VINH
L10
VINH
L11
VINH
L12
VINH
M7
VINH
M8
VINH
M11
VINH
M12
FCB
K2
TMR
D4
TRACK/SS
L2
RUN
D5
VING
M9
VINGP
M10
VOSNS+ H1
VORB+ D1
DRVCC J4
INTVCC K4
COMP J1
SW H10
PGOOD L1
TEMP A5
_LATCH C5
E17 VORB-
E17 VORB-
R36 (OPT)R36 (OPT)
CO3
47uF
1210
CO3
47uF
1210
E19
RUN E19
RUN
R12 10
R12 10
J5J5
1
2
3
4
5
R18
7.15K
R18
7.15K
C2
4.7uF
C2
4.7uF
C4
(OPT)
C4
(OPT)
R7 100KR7 100K
R6 0R6 0
R27
(OPT)
R27
(OPT)
JP3JP3
C6
(OPT)
C6
(OPT)
D2 CMOZ43V
D2 CMOZ43V
2 1
R10
1.78M
R10
1.78M
R19
4.12K
R19
4.12K
R26
2.49K
0.1%R26
2.49K
0.1%
TS1
COMP
TS1
COMP
Q3
PH2625L
Q3
PH2625L
1
25
3
4
R22
715
R22
715
TS3
CROWBAR
TS3
CROWBAR
CIN4
4.7uF
50V
1210
CIN4
4.7uF
50V
1210
CO5
47uF
1210
CO5
47uF
1210
R8 10R8 10
JP8JP8
R16 1MR16 1M
C9
8.2nF
C9
8.2nF
+
CO2
150uF
+
CO2
150uF
R24
13K
R24
13K
JP9JP9
1
2
3
+
CIN2
100uF
50V
+
CIN2
100uF
50V
JP1JP1
JP12JP12
1
2
3
JP16JP16
8
dc1543afa
DEMO MANUAL DC1543A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2011
LT 1112 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 applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
