DEMO MANUAL DC1635A LTC4412/LTC4414: Dual Low Loss High Voltage PowerPath Controllers DESCRIPTION Demonstration circuit 1635A features the LTC®4412HVIS6 and LTC4414EMS8, low loss PowerPath™ controllers. Each controller is capable of automatically switching between primary and auxiliary power sources for a single output. There are two electrically isolated circuits, one for each IC, for independent evaluation. The LTC4412 circuit is intended for lower current loads, while the LTC4414 circuit is capable of driving larger PMOS devices for higher current loads. The primary power paths can be controlled with external logic applied to the CTL pins. PowerPath status can be monitored using the STAT pins. Evaluation of higher current or more complex sourcing systems can be accomplished by installing additional ICs, as well as paralleling the inputs and/or outputs using the optional supplied pads. Multiple standard MOSFET package options are also available on each circuit for evaluation convenience. The input supply voltage ranges are from 2.5V to 36V for LTC4412 and 5V to 36V for LTC4414. As initially configured with the default MOSFET, the LTC4412 circuit maximum input voltage is 18V. The LTC4412 and LTC4414 circuit current limits are 2A and 8A respectively. Design files for this circuit board are available at http://www.linear.com/demo/DC1635A PERFORMANCE SUMMARY L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications are at TA = 25°C PARAMETER CONDITIONS Minimum LTC4412 Input Voltage VIN1 VALUE 2.5 UNIT V Maximum LTC4412 Input Voltage VIN1 and VAUX1 18 V LTC4412 Maximum Current MOSFET Limited 2 A Minimum LTC4414 Input Voltage VIN2 and VAUX2 5 V Maximum LTC4414 Input Voltage VIN2 and VAUX2 36 V LTC4414 Maximum Current MOSFET Limited 8 A dc1635afc 1 DEMO MANUAL DC1635A QUICK START PROCEDURE Demonstration circuit 1635A is easy to set up to evaluate the performance of LTC4412 and LTC4414. Refer to Figure 1 for proper measurement equipment setup of both circuits and follow the procedures below. LTC4412 Circuit 1. With all power off, connect auxiliary (VAUX1) and primary (VIN1) power supplies capable of 2A each, the system load and meters as shown in Figure 1. 2.Preset the system load to 0A and the input supplies to 0V, 0A current limit. 3. Connect the system load to the output terminals, VOUT1 and GND1. 4.Turn on the supplies, setting the current limit up to 2A. Adjust the voltages to the desired value, up to 18V. The higher voltage of the two supplies should appear at the output. 5.Turn the load on and adjust as necessary. 6. Adjust the supplies and observe how the output switches over to follow the higher voltage of the two sources. LTC4414 Circuit 1. With all power off, connect auxiliary (VAUX2) and primary (VIN2) power supplies capable of 8A each, the system load, and meters as shown in Figure 1. 2.Preset the system load to 0A and the input supplies to 0V, 0A current limit. 3. Connect the system load to the output terminals, VOUT2 and GND2. 4.Turn on the supplies, setting the current limit up to 8A. Adjust the voltages to the desired value, up to 36V. The higher voltage of the two supplies should appear at the output. 5.Turn the load on and adjust as necessary. 6. Adjust the supplies and observe how the output switches over to follow the higher voltage of the two sources. Optional 7. For improved current handling, install additional MOSFETs, select from different package footprints, or shunt the two circuits at VIN, VOUT and GND. 8. For source-load back-to-back isolation, remove jumpers JMP1 and JMP2, and/or JMP3 and JMP4, then install additional MOSFETs back-to-back as shown in Figure 2. 9.For external control of the primary source power path, remove the 0Ω jumper on the CTL1 or CTL2 pin, R2 or R5 respectively. Apply the logic-control signal on CTL1 or CTL2 as necessary. 2 dc1635afc DEMO MANUAL DC1635A QUICK START PROCEDURE V +– + A AUXILIARY SUPPLY 1 – – – LTC4412 CIRCUIT V – + SYSTEM LOAD 1 PRIMARY SUPPLY 1 A A + + A A V + – + + SYSTEM LOAD 2 PRIMARY SUPPLY 2 LTC4414 CIRCUIT – – + A AUXILIARY SUPPLY 2 – DC1635 F01 +– V Figure 1. Test Setup of DC1635A dc1635afc 3 DEMO MANUAL DC1635A QUICK START PROCEDURE CIRCUIT A CIRCUIT B JMP1 0Ω VAUX1 VAUX2 Q1A SiA921EDJ JMP2 0Ω VIN1 JMP3 0Ω Q1B SiA921EDJ COUT1 0.1µF VOUT1 Q2 Si7463DP JMP4 0Ω VIN2 Q3 Si7463DP U1 LTC4412HV CIN1 0.1µF R2 0Ω VOUT2 U2 LTC4414HV SENSE VIN COUT2 0.1µF GND GATE CTL STAT CIN2 0.1µF R1 680k R5 0Ω STAT1 SENSE VIN GND GATE CTL STAT R4 100k STAT2 DC1635 F02a Figure 2a. Standard Configurations with Automatic Switchover Between Sources DUAL PKG DUAL PKG VAUX2 VAUX1 JMP5 0Ω Q1A SiA921EDJ Q6A SiA921EDJ VIN1 JMP6 0Ω Q1B SiA921EDJ COUT1 0.1µF Q6B SiA921EDJ VOUT1 CTL1 VIN Q3 Si7463DP GATE CTL STAT COUT2 0.1µF Q15 Si7463DP JMP8 0Ω VOUT2 U2 LTC4414HV SENSE GND Q14 Si7463DP VIN2 U1 LTC4412HV CIN1 0.1µF JMP7 0Ω Q2 Si7463DP CIN2 0.1µF R1 680k STAT1 CTL2 VIN SENSE GND GATE CTL STAT R4 100k DC1635 F02b STAT2 Figure 2b. Optional, Fully-Isolated Configurations with External Logic Control Diodes shown are body diodes of their respective MOSFETs. Do not install extra diodes or the operation of the power paths may be compromised. 4 dc1635afc DEMO MANUAL DC1635A QUICK START PROCEDURE 0Ω VIN1 COUT1 0.1µF Q8 Si7463DP JMP5 0Ω VOUT1 U1 LTC4412HV CIN1 0.1µF CTL1 VIN SENSE GND GATE CTL STAT R1 680k DC1635 F02c STAT1 Figure 2c. Optional, High Side Switch with Logic Control and Status Output (Requires 0Ω Jumper Across Drain-Source Pins of Q7) FROM WALL ADAPTER SCHOTTKY JMP1 0Ω VAUX1 JMP2 0Ω VIN1 Q5 Si7463DP BAT1 + Q5 Si7463DP LOAD R2 0Ω X1 GND1 AND GND2 SHARED VIN GND CTL GATE STAT JMP4 0Ω Q3 Si7463DP + VCC1 SENSE VIN2 CIN1 0.1µF R3 560k STAT1 X2 VOUT1 AND VOUT2 SHARED R6 0Ω GND2 VIN BAT1 GATE CTL STAT SENSE GATE CTL X2 GND1 AND GND2 SHARED STAT GND1 CTL1 X1 VIN1 AND VIN2 SHARED Q3 Si7463DP COUT2 0.1µF R3 560k VCC1 STAT1 JMP4 0Ω VIN2 VOUT2 + BAT2 U2 LTC4414HV VCC2 SENSE GND VIN GND U2 LTC4414HV CIN2 0.1µF + U3 LTC4414HV U3 LTC4414HV CIN1 0.1µF BAT2 COUT1 0.1µF JMP2 0Ω VIN1 FROM CHARGER VOUT1 CIN2 0.1µF R6 560k DC1635 F02d STAT2 Figure 2d. Optional, High Current Dual Battery Load Sharing with Automatic Switchover and Status Output CTL2 GND2 VIN SENSE GND GATE CTL STAT R6 560k VCC2 STAT2 DC1635 F02e Figure 2e. Optional, Dual Battery Charging with Logic Select and Status Output dc1635afc 5 A B C D CTL2 GND2 GND2 5V - 36V @ 8A VIN2 VIN2 GND2 GND2 5V - 36V @ 8A VAUX2 VAUX2 CTL1 GND1 GND1 2.5V - 18V @ 2A VIN1 VIN1 GND1 GND1 3V - 18V @ 2A VAUX1 J2 5 E18 E8 CIN1 0.1uF 50V 0805 0 R6 3 7 4 CTL22 VIN2 CTL1 3 2 1 NC CTL GND VIN U2 CTL GND VIN U1 NC STAT GATE SENSE LTC4414EMS8 STAT GATE SENSE LTC4412HVIS6 5 1 8 6 4 5 6 STAT2 GATE2 VOUT2 STAT1 GATE1 VOUT1 4 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. 8 7 6 5 8 7 6 5 DUAL PKG NOTE: UNLESS OTHERWISE SPECIFIED CIN2 0.1uF 50V 0805 VIN2 VAUX2 R5 0 VIN1 VAUX1 VAUX2 CTL1 CTL2 J8 J7 E7 E6 J6 J5 E5 E13 E4 J4 J3 E3 E2 J1 E1 4 SiA921EDJ Q1B SiA921EDJ Q2 Si7463ADP 3 2 1 ISOLATED 8 3 7 6 Q1A 4 1 JMP4 * 560K (OPT) R4 * 560K (OPT) R2 * * STAT1 GATE1 JMP2 JMP1 CUSTOMER NOTICE S2B S2B S2A JMP3 S1B S1B S1A S1A R1 680K S2A R3 100K 3 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. E17 E16 STAT2 GATE2 E12 J12 J11 E11 E15 E14 E10 J10 J9 E9 2 2 SCALE = NONE JOSH Y. AK APPROVALS VCC2 COUT2 0.1uF 50V 0805 VCC1 COUT1 0.1uF 50V 0805 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. Q3 Si7463ADP 3 2 1 4 4 5 2 6 5 VAUX1 2 JOSH Y. APPROVED DATE TOP LAYER CIRCUITS FOR U1 AND U2 ARE ELECTRICALLY ISOLATED FROM EACH OTHER. THEY DO NOT SHARE GND, VIN, VAUX, OR VOUT. JUMPERS CAN BE USED TO PARALLEL THE TWO CIRCUITS AS NECESSARY. 03-17-16 DATE: 1 DEMO CIRCUIT 1635A SHEET 1 LTC4412HVIS6 & LTC4414EMS8 Thursday, March 17, 2016 IC NO. DUAL LOW LOSS 36V POWERPATH CONTROLLERS N/A SIZE TECHNOLOGY 2 OF 3 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only # IF THE CTL PIN OF THE LTC4412 AND/OR LTC4414 IS NOT USED, IT IS RECOMENDED THAT CTL BE CONNECTED TO GND IN THE FINAL DESIGN. TITLE: SCHEMATIC VCC2 STAT2 GND2 GND2 VOUT2 *CLARIFICATION: SHOWN HERE AS CONNECTED FOR TOP 5V - 36V @ 8A LAYER CIRCUIT, BUT STUFFED ON BOTTOM LAYER. VOUT2 VOUT2 VCC1 STAT1 GND1 GND1 DESCRIPTION 2ND PROTOTYPE NOTE FOR THIS PAGE: REV 2.5V - 18V @ 2A VOUT1 VOUT1 VOUT1 ECO 1 REVISION HISTORY A B C D DEMO MANUAL DC1635A SCHEMATIC DIAGRAMS dc1635afc A B C D 5 CTL2 VIN2 VAUX2 OPTIONAL CIRCUIT CTL1 VIN1 VAUX1 2 1 4 2 3 7 4 CTL2 3 VIN2 VAUX2 CTL1 VIN1 VAUX1 4 CTL GND VIN U4 STAT GATE SENSE LTC4412HVIS6 (OPT) DUAL PKG NC STAT GATE SENSE LTC4414EMS8 (OPT) ISOLATED NC CTL GND VIN U3 4 5 6 5 1 8 6 STJ1 Si7463ADP (OPT) 8 7 6 5 OPT (SiA921EDJ) 8 4 3 Q13B OPT (SiA921EDJ) 7 1 6 Q13A GTJ1 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 SCALE = NONE JOSH Y. AK DATE: N/A SIZE TECHNOLOGY 1 DEMO CIRCUIT 1635A SHEET 2 LTC4412HVIS6 & LTC4414EMS8 Thursday, March 17, 2016 IC NO. 2 OF 3 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 1 DUAL LOW LOSS 36V POWERPATH CONTROLLERS TITLE: SCHEMATIC STAT2 GATE2 VOUT2 GTJ2 STJ2 DUAL PKG STAT1 GATE1 VOUT1 GTJ1 STJ1 2 APPROVALS Q8 Si7463ADP (OPT) S1B 8 7 S1B 3 2 6 1 5 3 2 1 Q5 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. STAT2 GATE2 S2B S2B S1A S1A CUSTOMER NOTICE OPT (SiA921EDJ) 4 Q12B S2A S2A 3 2 1 Q7 Si7463ADP (OPT) 3 2 1 Si7463ADP (OPT) Q4 OPT (SiA921EDJ) 1 Q12A VOUT2 8 3 7 6 STAT1 GATE1 VOUT1 8 7 6 5 8 7 6 5 3 4 4 4 4 5 2 5 2 5 OPTIONAL CIRCUIT A B C D DEMO MANUAL DC1635A SCHEMATIC DIAGRAMS dc1635afc 7 A B C JMP5 0 STJ1 SiA921EDJ Q6A 7 6 VOUT1 DUAL PKG GATE2 S2B STAT2 S2A 0 5 JMP8 3 2 1 0 Q15 Si7463ADP JMP7 3 2 1 Q14 Si7463ADP STJ2 GTJ2 8 7 6 5 8 7 6 5 VOUT2 VIN2 VAUX2 OPTIONAL CIRCUIT STAT1 S1A 1 2 D 4 4 Q16B Si7905DN 3 1 8 3 STJ2 Q17A Si7905DN DUAL PKG SiA921EDJ S2B 6 5 8 7 GATE1 VIN1 STAT1 VAUX1 6 5 8 7 3 1 STJ1 GTJ1 6 5 8 7 GTJ1 STJ1 VOUT1 1 2 SCALE = NONE JOSH Y. AK APPROVALS DATE: N/A SIZE 1 DEMO CIRCUIT 1635A Thursday, March 17, 2016 IC NO. SHEET 3 LTC4412HVIS6 & LTC4414EMS8 2 REV. OF 3 DUAL LOW LOSS 36V POWERPATH CONTROLLERS TITLE: SCHEMATIC TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only THERE ARE MORE GUIDELINES SPECIFICALLY FOR CERTAIN CIRCUITS. PLEASE SEE THE QUICK START GUIDE FOR MORE APPLICATIONS AND INFORMATION. 1. NEVER INSTALL U1 (TOP LAYER) AND U3 (BOTTOM LAYER) AT THE SAME TIME. INSTALL ONE OR THE OTHER, BUT NOT BOTH. 2. NEVER INSTALL U2 (TOP LAYER) AND U4 (BOTTOM LAYER) AT THE SAME TIME. SAME AS 1. 3. JMP1-4 ARE MEANT FOR SIMPLE DIODE-OR OPERATION. THEY MUST BE REMOVED FOR PROPER BACK-TO-BACK ISOLATION. THE DEMO BOARD AS SHIPPED SHOWS THE MOST COMMON FUNCTIONS FOR TWO ELECTRICALLY ISOLATED CIRCUITS. THIS DEMO BOARD WAS DESIGNED TO SHOW CASE THE MAXIMUM NUMBER OF EVALUATION OPTIONS THAT CORRESPOND TO THE CIRCUITS IN THE DATA SHEETS BOTH ICs. HOWEVER, THERE ARE SOME IMPORTANT RULES TO ALWAYS FOLOW: THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 3 3 S1B S1A Q19B Si7905DN 1 DUAL PKG Q19A Si7905DN Q18B Si7905DN Q18A Si7905DN DUAL PKG 2 NOTE FOR ALL CIRCUITS: VIN1 VAUX1 CUSTOMER NOTICE GTJ2 VOUT2 STJ2 VOUT1 3 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. GTJ2 Q17B Si7905DN 1 S2B 3 S2A GTJ1 4 Q16A Si7905DN GATE2 8 7 STAT2 6 5 DUAL PKG 0 S2A JMP6 ISOLATED GATE1 S1B S1B Q6B 4 2 OPTIONAL CIRCUIT 4 4 5 2 4 2 4 2 8 4 5 A B C D DEMO MANUAL DC1635A SCHEMATIC DIAGRAMS dc1635afc DEMO MANUAL DC1635A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 4 COUT1, CIN1, COUT2, CIN2 CAP., X7R, 0.1µF, 50V, 10% 0805 AVX, 08055C104KAT2A 2 1 Q1 DUAL P-CHAN., 20V/4.5A VISHAY, SiA921EDJ-T1-GE3 3 2 Q2, Q3 MOSFET P-CHAN., 40V/10A VISHAY, Si7463DP-T1-GE3 4 1 R1 RES., CHIP, 690k, 1%, 0603 VISHAY, CRCW0603690KFKEA 5 1 R3 RES., CHIP, 100k, 1%, 0603 VISHAY, CRCW0603100KFKEA 6 2 R5, R6 RES., CHIP, 0Ω, 0603 VISHAY, CRCW06030000Z0EA 7 1 U1 I.C., LTC4412HVIS6 LINEAR TECH., LTC4412HVIS6#PBF 8 1 U2 I.C., LTC4414EMS8 LINEAR TECH., LTC4414EMS8#PBF Additional Circuit Components 1 0 Q6, Q12, Q13 OPT VISHAY, SiA921EDJ-T1-GE3 2 0 Q4, Q5, Q7, Q8, Q14, Q15 OPT VISHAY, Si7463DP-T1-GE3 3 0 Q16, Q17, Q18, Q19 OPT VISHAY, Si7905DN-T1-E3 4 4 JMP1, JMP2, JMP3, JMP4 JUMPER, 1206 TEPRO, RN6087 5 2 R2, R4 RES., CHIP, 560k, 1%, 0603 VISHAY, CRCW0603560KFKEA 6 0 JMP5, JMP6, JMP7, JMP8 RES., 0603 OPT 7 0 U3 I.C., LTC4414EMS8 OPT LINEAR TECH., LTC4414EMS8#PBF 8 0 U4 I.C., LTC4412HVIS6 OPT LINEAR TECH., LTC4412HVIS6#PBF E1, E2, E3, E4, E5, E6, E7, E8, E9, E10 TEST POINT, TURRET, 0.095" MILL-MAX, 2501-2-00-80-00-00-07-0 Hardware-For Demo Board Only 1 18 E11, E12, E13, E14, E15, E16, E17, E18 TEST POINT, TURRET, 0.095" MILL-MAX, 2501-2-00-80-00-00-07-0 2 12 J1, J2, J3, J4, J5, J6, J7, J8, J10, J11, J12 BANANA JACK KEYSTONE, 575-4 3 4 (STAND OFF) STAND OFF, NYLON 0.25" KEYSTONE, 8831 (SNAP ON) dc1635afc 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. 9 DEMO MANUAL DC1635A 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 10 Linear Technology Corporation dc1635afc LT 0316 REV C • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2011