Linear Technology DC1624A Quick setup guide

1
dc1624af
DEMO MANUAL DC1624A
Description
LTC4225-1/LTC4225-2
Dual Ideal Diode and
Hot Swap Controller
Demonstration circuit 1624A contains two independentrail
circuits each with Hot Swap™ and ideal diode functionality
provided by the LTC4225-1/LTC4225-2 dual ideal diode
and Hot Swap controller.
DC1624A facilitates evaluation of LTC4225 performance in
different operation modes such as supply ramp-up, power
supply switchover, steady state, and overcurrent faults.
Power supply switchover mode can be realized as either
an ideal diode functionality or as a prioritizer functionality.
Each DC1624A rail circuit is assembled to operate with a
12V supply and 11.5A maximum current load.
The main components of the board are the LTC4225
controller, two MOSFETs operating as ideal diodes, two
MOSFETs operating as Hot Swap devices, two power sense
resistors, two jumpers for independently enabling each
perForMAnce sUMMArY
rail, four LEDs to indicate power good and fault conditions
separately for each channel, and input voltage snubbers.
There are pads for optional RC circuits for each Hot Swap
MOSFET gate in order to adjust output voltage slew rate.
The standard configuration (as DC1624A populated by
default) places the ideal diode MOSFET ahead of the
Hot Swap MOSFET. The board also has pads for an alter-
native configuration with the Hot Swap MOSFET located
ahead of the ideal diode MOSFET.
Design files for this circuit board are available at
http://www.linear.com/demo
(TA= 25°C)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 2.9 18 V
VINTVCC(UVL) Internal VCC Undervoltage Lockout INTVCC Rising 2.1 2.2 2.3 V
VINTVCC(HYST) Internal VCC Undervoltage Lockout
Hysteresis
30 60 90 mV
Ideal Diode Control
ΔVFWD(REG) Forward Regulation Voltage (VINN - VOUT)10 25 40 mV
ΔVDGATE External N-Channel Gate Drive
(VDGATEN - VINN)
ΔVFWD = 0.1V
IN < 7V
IN = 7V to 18V
5
10
7
12
14
14
V
V
ICPO(UP) CPONPull-Up Current CPO = IN = 2.9V
CPO = IN = 18V
–60
–50
–95
–85
–120
–110
µA
µA
IDGATE(FPU) DGATENFast Pull-Up Current ΔVFWD =0.2V, ΔVDGATE = 0V, CPO = 17V –1.5 A
IDGATE(FPD) DGATENFast Pull-Down Current ΔVFWD = –0.2V, ΔVDGATE = 5V 1.5 A
Hot Swap Control
ΔVSENSE(CB) Circuit Breaker Trip Sense Voltage
(VINN - VISENSEN)
47.5 50 52.5 mV
ΔVSENSE(ACL) Active Current Limit Sense Voltage
(VINN - VISENSEN)
55 65 75 mV
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Downloaded from Arrow.com.

2
dc1624af
DEMO MANUAL DC1624A
perForMAnce sUMMArY
qUick stArt proceDUre
The LTC4225 functions as an ideal diode with inrush cur-
rent limiting and overcurrent protection by controlling
two external back-to-back N-channel MOSFETs in a power
path. The LTC4225 has two ideal diode and two Hot Swap
controllers. Each ideal diode MOSFET is intended to oper-
ate with a defined Hot Swap MOSFET, because they are
tied by common on/off control, and ideal diode controller
sense voltage includes both MOSFETs and sense resistor
voltage drop. Therefore, LTC4225 provides independent
control for the two input supplies.
The LTC4225 gate drive amplifiers (DGATEN,) monitor
the voltage between the INNand OUTNpins and drive the
DGATENpins. The amplifier quickly pulls up the DGATE
pin, turning on the MOSFET (Q1 or Q3), for ideal diode
control when it senses a large forward voltage drop.
Pulling the ON pin high and EN pins low initiates a 100ms
debounce timing cycle. After 100ms,a 10µA current source
from the charge pump ramps up the HGATENpin. When
the Hot Swap MOSFET (Q2 or Q4) turns on, the inrush
current is limited to a set level set by an external sense
resistor placed between IN and SENSE pins.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IHGATE(UP) External N-Channel Gate Pull-Up Current Gate Drive On, HGATE = 0V 7 10 13 µA
IHGATE(DN) External N-Channel Gate Pull-Down Current Gate Drive Off, OUT = 12V, HGATE = OUT + 5V 150 300 500 µA
IHGATE(FPD) External N-Channel Gate Fast Pull-Down
Current
Fast Turn-Off, OUT = 12V, HGATE = OUT + 5V 100 200 300 mA
Input/Output Pin
VON(TH) ONNOn Pin Threshold Voltage ON Rising 1.21 1.235 1.26 V
VON(RESET) ONNPin Fault Reset Threshold Voltage ON Falling 0.55 0.6 0.63 V
VEN(TH) ENNPin Threshold Voltage EN Rising 1.185 1.235 1.284 V
VTMR(TH) TMRNPin Threshold Voltage TMR Rising
TMR Falling
1.198
0.15
1.235
0.2
1.272
0.25
V
V
ITMR(UP) TMRNPin Pull-Up Current TMR = 1V, In Fault Mode 75 100 125 µA
ITMR(DN) TMRNPin Pull-Down Current TMR = 2V, No Faults 1.4 22.6 µA
ITMR(RATIO) TMRNCurrent Ratio ITMR(DN)/ ITMR(UP) 1.4 22.7 %
(TA= 25°C)
An active current limit amplifier servos the gate of the
MOSFET to 65mV across the current sense resistor. In-
rush current can be further reduced, if desired, by adding
a capacitor from HGATE to GND. When the MOSFET’s
gate overdrive (HGATE to OUT voltage) exceeds 4.2V, the
PWRGD pin pulls low.
When both MOSFETs (Q1 and Q2 or Q3 and Q4) are turned
on, the gate drive amplifier controls DGATE to servo the
forward voltage drop (VIN -
VOUT) across the sense resistor
and the back-to-back MOSFETs to 25mV. If the load current
causes more than 25mV of voltage drop, the gate voltage
rises to enhance the MOSFET used for ideal diode control.
For large output currents the MOSFET’s gate is driven
fully on and the voltage drop is equal to the sum of the
ILOAD • RDS(ON) of the two MOSFETs in series.
In the case of an input supply short circuit when the
MOSFETs are conducting, a large reverse current starts
flowing from the load towards the input. The gate drive
amplifier detects this failure condition as soon as it ap-
pears and turns off the ideal diode MOSFET by pulling
down the DGATE pin.
Downloaded from Arrow.com.Downloaded from Arrow.com.

3
dc1624af
DEMO MANUAL DC1624A
qUick stArt proceDUre
Demonstration circuit DC1624A can be easily to set up to
evaluate the performance of the LTC4225-1/LTC4225-2.
Refer to the Figure 1 for proper measurement equipment
setup and follow the procedure below.
The DC1624A test includes independent tests of the
LTC4225 Hot Swap functionality, ideal diode functional-
ity and two power rails prioritizer functionality with the
channel 1 highest priority.
HOT SWAP FUNCTIONALITY TEST
This test is identical for each 12V rail and is performed
in the three steps by the measuring of the transient’s
parameters in the different operation modes.
The first step is a power-up without any additional load.
The second step is the current limit operation after suc-
cessful power-up transient. The third step is a power-up
with a shorted output.
Initially install the jumper heads in the following positions:
ON1_SEL and ON2_SEL in position OFF;
EN1_SEL and EN2_SEL in position LOW.
First Step
Connect a 12V power supply to the board input turrets
IN1 (IN2) and GND. Do not load the output. Place current
probe on the 12V supply and voltage probes on the OUT1
(OUT2) turret.
Provide ON1 (ON2) signal at the ON1 (ON2) pin by mov-
ing the ON1_SEL (ON2_SEL) jumper header from OFF
position to the ON position. Observe the transient. The
output voltage rise time should be in the range of 12ms
to 29ms. PWRGD1 (PWRGD2) green LED should be lit.
Turn off the rail using the ON1_SEL (ON2_SEL) jumper.
Second Step
Initially adjust an electronic resistive load to 10Ω to 12Ω
and connect it to the OUT1 (OUT2) turret and GND. Turn
on the rail and slowly increase load current up to the circuit
breaker threshold level. The current limit range should be
from 11.5A to 13.3A. Turn off the rail using the ON1_SEL
(ON2_SEL) jumper.
Third Step
Short the output to ground with a wire. Place the current
probe on this wire. Turn on the rail and record the current
shape. The maximum current should be in the (13.6A to
18.9A) range. The LTC4225-1 latches off after overcurrent
condition, but the LTC4225-2 automatically retries after
200ms to 450ms.
IDEAL DIODE FUNCTIONALITY TEST
Use an individual 12V power supply for each rail; connect
the two outputs together at a common load. Adjust each
input voltage to 12V with maximum possible accuracy.
In this test, both rails are active and small variations in
the input voltage will force one channel off and the other
channel on.
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

4
dc1624af
DEMO MANUAL DC1624A
qUick stArt proceDUre
Place a voltmeter between IN1 and IN2 turrets to measure
the difference between two input voltages. Activate both
rails and keep a load around 1A to 3A. Adjust with the input
voltage levels and verify that when the difference between
input voltages exceeds 40mV only one rail is active.
THE PRIORITIZER FUNCTIONALITY TEST
The DC1624A is assembled with components to imple-
ment a two power rails prioritizer with channel 1 having
the higher priority.
Install R17 with 470 and R18 with 41.2k.
Place JP5 PPR_SEL (power priority select) jumper in posi-
tion ON2 and JP4 ON2_SEL (ON2 select) in position OFF.
Apply independent supply voltages (12V) to both inputs.
Channel 1 will be connected to load. Reduce channel 1
input voltage until it reaches an undervoltage condition
and D5 (PWRGD2) lights. At the same time channel 2
power supply will deliver power to the load.
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

5
dc1624af
DEMO MANUAL DC1624A
Figure 1. Measurement Equipment Setup for Hot Swap Functionality Test
SW1
DC1624A F01
POWER
SUPPLY 1
POWER
SUPPLY 2
CL1
RL1
SW2
SW3
CL2
RL2
SW4
qUick stArt proceDUre
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

6
dc1624af
DEMO MANUAL DC1624A
pArts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 7 C1, C2, C3, C8, C9, C11, C14 CAP, X7R, 0.1µF, 50V, 0603 AVX, 06035C104KAT
2 2 C4, C5 CAP, X7R, 47nF, 50V, 0603 AVX, 06035C473KAT
3 2 C6, C7 CAP, X7R, 15nF, 50V, 0603 AVX, 06035C153KAT
4 0 C10, C13 OPT
5 2 C12, C15 CAP, AL, El, S/M 100µF, 50V SANYO, 50CE100BS
6 2 D1, D2 DIODE, VOLTAGE SUPP 13V 5% SMA VISHAY, SMAJ17A-E3
7 2 D3, D5 LED, SMT GREEN PANASONIC, LN1351C
8 2 D4, D6 LED, SMT RED PANASONIC, LN1251CTR
9 0 D7, D8, D10, D11 OPT
10 1D9 DIODE, SWITCHING, SOD80 VISHAY, LS4148
11 8E10 to E16, E18 TURRET, TESTPOINT, 2308 MILL-MAX, 2308-2-00-80-00-00-07-0
12 10 E1 to E9, E17 TURRET, TESTPOINT, 2501 MILL-MAX, 2501-2-00-80-00-00-07-0
13 8 J1 to J8 JACK BANANA KEYSTONE, 575-4
14 5JP1, JP2, JP3, JP4, JP5 HEADERS, 3 PINS 2mm CTRS SAMTEC TMM-103-02-L-S
15 5 XJP1, XJP2, XJP3, XJP4,
XJP5
SHUNT, 2mm CTRS SAMTEC 2SN-BK-G
16 4 Q1, Q2, Q3, Q4, N-CHANNEL 30-V MOSFET, PPSO-8 VISHAY, Si7336ADP
17 0 Q5, Q6, Q7, Q8 OPT
18 2 RS1, RS2 RES, CHIP, 0.004, 1/2W, 1%, 2010 VISHAY, WSL20104L000FEA
19 0RS3, RS4 OPT
20 4R1, R3, R13, R14 RES, CHIP, 10, 1%, 0603 VISHAY, CRCW060310R0FKEA
21 2 R2, R4 RES, CHIP, 47, 1%, 0603 VISHAY, CRCW060347R0FKEA
22 4 R5, R6, R7, R8 RES, CHIP, 3k, 1%, 0805 VISHAY, CRCW08053K00FKEA
23 2R9, R11 RES, CHIP, 20k, 1%, 0603 VISHAY, CRCW0060320K0FKEA
24 2R10, R12 RES, CHIP, 137k, 1%, 0603 VISHAY, CRCW0603137KFKEA
25 0R15, R16, R17, R18 OPT
26 4 MTGS AT 4 CORNERS STANDOFF, NYLON, 0.25, 1/4" KEYSTONE, 8832 (SNAP ON)
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

7
dc1624af
DEMO MANUAL DC1624A
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
D D C C B B A A
EXT EXT
U1
LTC4225CUFD-1
ASSY
-A
-B
*
*
LTC4225CUFD-2
ON2
1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. NOTE: UNLESS OTHERWISE SPECIFIED
OPT
OPT
OPT
OPT
OPT OPT
OPT OPT
DG2
ON2
ON2
DG2HG2
DG1
DG1
HG1
HG2
HG1
IN2
IN1
IN1
IN1
OUT1 OUT2
IN2
IN2
INTVCC
INTVCC
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
VLADIMIR O.
PRODUCTION311-09-10
__
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
VLADIMIR O.
PRODUCTION311-09-10
__
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
VLADIMIR O.
PRODUCTION311-09-10
__
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
3
Tuesday, December 07, 2010
11
DUAL IDEAL DIODE AND HOT SWAP CONTROLLER
AK
VLADIMIR O.
N/A
LTC4225CUFD-1/-2
DEMO CIRCUIT 1624A
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
3
Tuesday, December 07, 2010
11
DUAL IDEAL DIODE AND HOT SWAP CONTROLLER
AK
VLADIMIR O.
N/A
LTC4225CUFD-1/-2
DEMO CIRCUIT 1624A
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
3
Tuesday, December 07, 2010
11
DUAL IDEAL DIODE AND HOT SWAP CONTROLLER
AK
VLADIMIR O.
N/A
LTC4225CUFD-1/-2
DEMO CIRCUIT 1624A
RS3 0.004 0.5W
2010
RS3 0.004 0.5W
2010
C6
15nF
50V
C6
15nF
50V
R4 47R4 47
D7
CMHZ4706
D7
CMHZ4706
2
1
E9
PROBE GND
E9
PROBE GND
R3
10
R3
10
Q1
Si7336ADP
Q1
Si7336ADP
4
51
3 2
6 7 8
C2
0.1uF
50V
C2
0.1uF
50V
Q3
Si7336ADP
Q3
Si7336ADP
4
51
3 2
6 7 8
J8
GND
J8
GND
R14
10
R14
10
JP5
OFF
PPR_SEL
JP5
OFF
PPR_SEL
1 3
2
E1
OUT1
E1
OUT1
D3
GREEN
D3
GREEN
12
JP4
ON2 ON2_SEL OFF
JP4
ON2 ON2_SEL OFF
1 3
2
C8
0.1uF
50V
C8
0.1uF
50V
JP2
LOW
EN2_SEL
JP2
LOW
EN2_SEL
1 3
2
J5
IN1
2.9V TO 18V J5
IN1
2.9V TO 18V
JP1
LOW
EN1_SEL
JP1
LOW
EN1_SEL
1 3
2
Q4
Si7336ADP
Q4
Si7336ADP
4
5 1
3 2
6 7 8
E11
PWRGD2
E11
PWRGD2
E5
IN1
E5
IN1
Q6 Si7336ADP Q6 Si7336ADP
4
51
3 2
6 7 8
C5
47nF 16V X7R
C5
47nF 16V X7R
R12
137K 1%
R12
137K 1%
C9
0.1uF
50V C9
0.1uF
50V
E16
PWRGD1
E16
PWRGD1
D9
LS4148
D9
LS4148
D2
SMAJ17A
D2
SMAJ17A
2
1
Q8
Si7336ADP
Q8
Si7336ADP
4
51
3 2
6 7 8
R16
OPT
R16
OPT
D6 RED D6 RED
1 2
C3
0.1uF
50V
C3
0.1uF
50V
D4 RED D4 RED
12
J1
OUT1 11.5A
J1
OUT1 11.5A
E18
ON1
E18
ON1
R17
OPT
R17
OPT
E7
IN2
E7
IN2
D11
CMHZ4706
D11
CMHZ4706
2
1
J7
IN2 2.9V TO 18V
J7
IN2 2.9V TO 18V
D10
CMHZ4706
D10
CMHZ4706
2
1
R15 OPT R15 OPT
+
C13
100uF
50V
OPT
+
C13
100uF
50V
OPT
RS4
0.004
0.5W
RS4
0.004
0.5W
C7
15nF
50V
C7
15nF
50V
D5
GREEN
D5
GREEN
1 2
+
C15
100uF
50V
+
C15
100uF
50V
E17
GND
E17
GND
R2 47R2 47
E2
GND
E2
GND
J4 GND J4 GND
R6 3K 0805 R6 3K 0805
R1 10 R1 10
D8
CMHZ4706
D8
CMHZ4706
2
1
R9
20K 1%
R9
20K 1%
E14 EN1 E14 EN1 E12
FAULT2
E12
FAULT2
R10
137K 1%
R10
137K 1%
J6
GND
J6
GND
E13
EN2
E13
EN2
E4 GND E4 GND
C4 47nF 16V C4 47nF 16V
+
C12
100uF
50V
+
C12
100uF
50V
+
C10
100uF
50V
OPT
+
C10
100uF
50V
OPT
D1
SMAJ17A
D1
SMAJ17A
2
1
RS1 0.004 0.5W
2010
RS1 0.004 0.5W
2010
E6
GND
E6
GND
JP3
ON1
ON1_SEL
OFF
JP3
ON1
ON1_SEL
OFF
1 3
2
C14
0.1uF 50V
C14
0.1uF 50V
R18
OPT
R18
OPT
C1 0.1uF 50V C1 0.1uF 50V
Q7
Si7336ADP
Q7
Si7336ADP
4
5 1
3 2
6 7 8
J3
OUT2
11.5A
J3
OUT2
11.5A
E8
GND
E8
GND
R8
3K
0805
R8
3K
0805
J2
GND
J2
GND
R13
10
R13
10
R5 3K 0805 R5 3K 0805
Q5
Si7336ADP
Q5
Si7336ADP
4
5 1
3 2
6 7 8
C11
0.1uF
50V
C11
0.1uF
50V
R7
3K
0805
R7
3K
0805
E3 OUT2 E3 OUT2
E15
FAULT1
E15
FAULT1
R11
20K 1%
R11
20K 1%
RS2
0.004
0.5W
RS2
0.004
0.5W
E10
ON2
E10
ON2
Q2
Si7336ADP
Q2
Si7336ADP
4
5 1
3 2
6 7 8
U1U1
INTVCC
3
ON1
18
EP
25
GND
4
ON2
5
CPO2
9
IN2
6
SENSE2
7
HGATE2
10
DGATE2
8
OUT2
11
TMR2 15
PWRGD2 12
FAULT2 13
EN2 14
FAULT1 19
PWRGD1 20
TMR1 16
OUT1 21
DGATE1 24
HGATE1 22
SENSE1 1
IN1 2
CPO1 23
EN1 17
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

8
dc1624af
DEMO MANUAL DC1624A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2011
LT 0611 • 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
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.