Linear Technology LTC4415EMSE Quick setup guide

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DEMO MANUAL DC1819A
PARAMETER CONDITIONS VALUE
Minimum Input Voltage VINx 1.7V
Maximum Input Voltage VINx 5.5V
Maximum Output Current CLIMx Resistor-Adjustable 4A
CLIMx Internal Limit 6A
CLIMx Clamp Voltage Current Limit 0.5V
Forward Voltage Drop VINx = 3.6V, IOUTx = 1A 50mV Typ
Reverse Turn-Off Voltage VINx – VOUTx –30mV
Enable Threshold EN1 and EN2 800mV
DESCRIPTION
LTC4415EMSE
Dual 4A Ideal Diodes with
Adjustable Current Limit
Demonstration circuit 1819A features the LTC
®
4415EMSE
dual ideal diodes. Each independent ideal diode can be
used to replace a standard diode for improved low forward
drop in applications requiring maximum headroom and
overall system efficiency.
The input supply voltage ranges are from 1.7V to 5.5V for
each input/output pair. As initially configured, LTC4415 can
provide a maximum current limit of 4A for each diode,
but is jumper-selectable up to 6A (internal current limit).
The voltage of the current limit pins, CLIM1 and CLIM2,
can also be monitored for a scaled representation of the
output current.
For evaluation, each diode can be controlled by the EN-
ABLE CONTROL jumper, JP1, or by the enable input pins, 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
EN1 and EN2. As initially configured, by setting to BOTH
the user can apply input voltages and loads on each diode
independently. Selecting PRIORITY allows the LTC4415 to
automatically switch over between inputs when the proper
input voltage threshold on IN1 is achieved.
Status and warning LEDs and test points are provided for
the logic output pins STAT1, STAT2 and WARN1, WARN2,
respectively.
Optionally, the LTC4415EDHC version can also be used
for evaluation. It is a pin-compatible drop-in replacement.
Design files for this circuit board are available at
http://www.linear.com/demo
(TA= 25°C)

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DEMO MANUAL DC1819A
QUICK START PROCEDURE
Demonstration circuit 1819A is easy to set up to evaluate
the performance of the LTC4415. Refer to Figure 1 for
proper measurement equipment setup and follow the
procedure below.
1. Set the jumpers as below:
JP1 JP2 JP3
BOTH 4A 4A
2. With all power off, connect input 1 and 2 (VIN1 and
VIN2) power supplies capable of at least 4A each, the
loads (VOUT1 and VOUT2), and meters as shown in
Figure 1.
3. Preset the system loads to 0A and the input supplies
to 0V, 0A current limit.
4. Turn on the supplies, setting the current limit above 4A.
Adjust the voltages to the desired value, up to 5.5V.
5. Turn on the loads and adjust as necessary.
6. Monitor CLIM1 and CLIM2 pin voltages for a scaled
representation of the output currents.
7. Adjust the supply voltages further and observe how the
output states change accordingly. STAT1 and STAT2 will
change state if the input voltage drops below the UVLO
threshold.
8. Adjust the loads into current limit and observe how the
WARN1 and WARN2 states change accordingly.
Optional
1. For prioritization enable switchover set jumper JP1 to
PRIORITY.
2. For independent, external control of the enable pins,
remove the shunt on jumper JP1. Apply the logic control
signal on EN1 and EN2 as necessary.
3. With all power off, changethe CLIM1 andCLIM2 settings
on jumpers JP2 and JP3 for different current limits.
4. For load sharing or evaluation of the diode-OR func-
tion, connect the two diode outputs, OUT1 and OUT2,
together. The source of highest voltage will appear at
the output.
5. For independent path control from a common input,
connect the two diode inputs, IN1 and IN2, together.

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DEMO MANUAL DC1819A
QUICK START PROCEDURE
Figure 1. Proper Measurement Equipment Setup
+
–
+
–
LOAD1
+
–
+
–
LOAD2
+
–
VIN1
+
–
VIN2
+
–
+
–

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DEMO MANUAL DC1819A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 4 C1, C2, C3, C4 CAP, CHIP, X5R,10μF, ±10%, 16V, 0805 MURATA, GRM21BR61C106KE15L
2 1 R1 RES, CHIP, 100k, ±1%, 1/16W, 0402 VISHAY, CRCW0402100KFKED
3 1 R2 RES, CHIP, 2k, ±1%, 1/16W, 0402 VISHAY, CRCW04022K00FKED
4 1 R3 RES, CHIP, 21.5k, ±1%, 1/10W, 0402 VISHAY, CRCW040221K5FKED
5 2 R9, R10 RES, CHIP, 1k, ±1%, 1/16W, 0402 VISHAY, CRCW04021K00FKED
6 1 U1 IC, LTC4415EMSE LINEAR TECH., LTC4415EMSE#PBF
Additional Demo Board Circuit Components
1 4 C5, C6, C7, C8 CAP, CHIP, X5R,10μF, ±10%, 6.3V, 0603 TDK, C1608X5R0J106K
2 2 D1, D2 LED, SMT, GREEN, 0603 LITE-ON, LTST-C190KGKT
3 2 D3, D4 LED, SMT, YELLOW, 0603 LITE-ON, LTST-C190YKT
4 2 R4, R5 RES, CHIP, 10k, ±5%, 1/16W, 0402 VISHAY, CRCW040210K0JNED
5 2 R6, R13 RES, CHIP, 143Ω, ±1%, 1/16W, 0402 VISHAY, CRCW0402143RFKED
6 2 R8, R12 RES, CHIP, 332Ω, ±1%, 1/16W, 0402 VISHAY, CRCW0402332RFKED
7 4 R14, R15, R16, R17 RES, CHIP, 1k, ±5%, 1/16W, 0402 VISHAY, CRCW04021K00JNED
8 2 R7, R11 RES, CHIP, 1k, ±1%, 1/16W, 0402 VISHAY, CRCW04021K00FKED
9 4 R18, R19, R20, R21 RES, CHIP, 1Ω, ±5%, 1/16W, 0402 VISHAY, CRCW04021R00JNED
Hardware/Components (For Demo Board Only)
2 8 E1, E2, E5, E8, E14, E15, E16, E17 TEST POINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0
1 9 E3, E4, E6, E7, E9, E10, E11, E12, E13 TEST POINT, TURRET, 0.061" MILL-MAX, 2308-2-00-80-00-00-07-0
3 1 JP1 3 Pin Jumper, 2mm SAMTEC, TMM-103-02-L-S
4 2 JP2, JP3 2 ×5 Pin Jumper, 2mm SAMTEC, TMM-105-02-L-D
5 3 JP1-3 SHUNT, 2mm SAMTEC, 2SN-KB-G
6 4 STAND-OFF, NYLON, 0.500" KEYSTONE, 8833

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DEMO MANUAL DC1819A
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
4 4
3 3
2 2
1 1
4 4 3 3 2 2 1 1
UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V
1.7V - 5.5V
1.7V - 5.5V
BOTH ENABLE
CONTROL
PRIORITY
YLW
GRN YLW GRN
2A
INTERNAL 6A
4A 4A
2A 1A
Iout (A) = 500/RCLPROG
0.5A
6A INTERNAL
1A
0.5A
4A
4A
1.7V - 5.5V
1.7V - 5.5V
CLIM1 CLIM2
JOSH Y.
PRODUCTION FAB2 08-19-11
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
2
DEMO CIRCUIT 1819A
11
DUAL 4A IDEAL DIODES WITH ADJUSTABLE CURRENT LIMIT
N/A LTC4415EMSE
NC
JOSH Y.
08-19-11
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
VIN1
VIN2
VIN2VIN1
E6
GND
R12
332
R19
1
5%
R16 1K 5 %
C1
10μF 0805
16V
E1
VIN1
E5
VIN2
C5
10μF
6.3V
0603
JP1
R5
10k
E3
EN1
R13
143
R2
2k
E14
WARN2
E4
EN2
D3
STAT2
12
D1
STAT1
12
C6
10μF 6.3V 0603 C4
10μF 16V
0805
U1
LTC4415EMSE
1 3
10
7
17
15 14
2 4 8 5 6
9 16 13 12 11
IN1 EN1
OUT2
IN2
GND
OUT1
STAT1
IN1 CLIM1 IN2 CLIM2 EN2
OUT2 OUT1
WARN1
WARN2
STAT2
R4
10k
E8
CLIM2
E15
VOUT1
R8 332
R20
1 5%
C3
10μF
16V 0805
R1
100k
E13
STAT2
E16
GND
JP2
R15 1K 5 %
R7 1k
R17 1K 5 %
E12
WARN1
E17
VOUT2
C8 10μF
6.3V
0603
E10
GND
E7
CLIM1
E11
STAT1
E18
GND
R6
143
R3
21.5k
D2
WARN1
12
R21
1
5%
D4 WARN2
12
C7 10μF 6.3V
0603
R9
1k
E9
GND
R10
1k
JP3
R11
1k
C2
10μF
0805
16V
R14 1K 5 %
R18
1 5%
E2
GND

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DEMO MANUAL DC1819A
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2011
LT 1011 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

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