DEMO MANUAL DC2392A LTC7860 High Voltage Switching Surge Stopper Description Demonstration circuit 2392A is a high efficiency switching surge stopper featuring the LTC®7860. The board operates from an input range of 7V to 100V, and provides a 7V to 34V output at 0A to 10A. Its output is current limited. A soft-start feature controls output voltage slew rate at startup, reducing current surge and voltage overshoot. The demonstration board includes an optional reverse polarity protection MOSFET and has options for an input filter and diode to attenuate spikes. For a lower output voltage limit of less than 12V, there is an optional feedback circuit. The LTC7860 high efficiency surge stopper protects loads from high voltage transients. High efficiency compared to linear circuits permits higher currents and smaller solution sizes. During an input overvoltage event, such as a load dump in vehicles, the LTC7860 controls the gate of an external MOSFET to act as a switching DC/DC regulator (PROTECTIVE PWM mode). This operation regulates the output voltage to a safe level, allowing the loads to operate through the input overvoltage event. During normal operation (SWITCHON mode), the LTC7860 turns on the external MOSFET continuously, passing the input voltage through to the output. An internal comparator limits the Performance Summary voltage across the current sense resistor and regulates the maximum output current to protect against overcurrent faults. An adjustable timer limits the time that the LTC7860 can spend in overvoltage or overcurrent regulation. When the timer expires, the external MOSFET is turned off until the LTC7860 restarts after a cool down period. By strictly limiting the time in PROTECTIVE PWM mode when the power loss is higher, the components and thermal design can be optimized for normal operation and safely operate through high voltage input surges and/or overcurrent faults. This demo board takes advantage of the LTC7860’s VIN-centric PMOS architecture to float the control ground allowing operation beyond the controller’s 60V rating. This board is suitable for a wide range of automotive, military, telecom, industrial, and other applications. The LTC7860 is available in a small 12-pin thermally enhanced MSOP package. For other output requirements, see the LTC7860 data sheet or contact the LTC factory. Design files for this circuit board are available at http://www.linear.com/demo/DC2392A 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. Specifications are at TA = 25°C SYMBOL PARAMETER CONDITIONS VIN Input Supply Range Normal Operation MIN 7 32 V 500ms Ride-Through 7 100 V DC Survival 0 100 V 35 V 7 TYP UNITS VOUT Output Voltage IOUT Output Current Range, continuous Free Air ILIMIT Current Limit VIN = 28V 13 A ILIMIT Current Limit VIN = 40V 10.5 A VIN = 28V, IOUT = 10A 400 mV 350 kHz VIN-VOUT Insertion Loss FSW Switching (Clock) Frequency TPWM PROTECTIVE PWM Mode Time Limit VIN > 35V VOUT P-P Output Ripple VIN = 40V, VOUT = 17.2V, IOUT = 5A (20MHz BW) Approximate Size Component Area x Top Component Height 28 MAX 0 0.85 10 1.06 100 35 × 42 × 10 1.24 A s mVP–P mm dc2392af 1 DEMO MANUAL DC2392A Quick Start Procedure Demonstration circuit 2392 is easy to set up to evaluate the performance of the LTC7860. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below: 5. Once the proper output voltage is established, connect a variable load capable of sinking 10A at 34V to the output terminals +VOUT and –VOUT. Set the current for 0A. NOTE: When measuring the output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip and ground ring directly across the last output capacitor as shown in Figure 1. a. A Voltmeter with a capability of measuring at least 36V can be placed across the output terminals in order to get an accurate output voltage measurement. 1. Set an input power supply that is capable of 7V to 100V to 10V. Then turn off the supply. 2. With power off, connect the supply to the input terminals +VIN and –VIN. a. Input Voltages lower than 7V can keep the converter from turning on due to the undervoltage lockout feature of the LTC7860. b. A voltmeter with a capability of measuring at least 100V can be placed across the input terminals in order to get an accurate input voltage measurement. 3. Turn on the power at the input. NOTE: Make sure that the input voltage never exceeds 100V. 4. Check for the proper output voltage of 10V. Turn off the power at the input. 2 6. Turn on the power at the input. NOTE: If there is no output, temporarily disconnect the load to make sure that the load is not set too high. 7. Once the proper output voltage is again established, adjust the load and/or input within the operating range up to 33VIN and observe the output voltage and other desired parameters. 8. Now apply an input between 35V and 100V and observe the output voltage and fault timer operation. 9. If desired, you may apply input transient profiles in the range of 0VIN to 100VIN and observe the output to illustrate operation of the circuit to prevent input surges from reaching the output. 10.The output limit voltage can be set in accordance with the feedback notes on the schematic. The first line shows the complete formula. The second line is simplified for the use of a 2:1 divider as shown on the schematic. dc2392af DEMO MANUAL DC2392A Quick Start Procedure Figure 1. Proper Measurement Equipment Setup dc2392af 3 DEMO MANUAL DC2392A Quick Start Procedure VIN 100V VOUT 0V DC2392A F02 TIME 100 40 98 35 96 30 94 25 92 20 5AOUT 10AOUT 10AOUT-PD 90 88 15 10 86 84 POWER DISSIPATION (W) EFFICIENCY (%) Figure 2. Output Response Waveform with 28V to 100V to 28V Input Surge, (10AOUT) (20V, 20V, 10ms/DIV) 5 6 0 100 10 VIN DC2392A F03 Figure 3. Efficiency and Power Dissipation 4 dc2392af DEMO MANUAL DC2392A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER CAP., ALUM, 15µF, 100V 8X12 PANASONIC, 100SXV15M Required Circuit Components 1 1 CIN1 2 4 CIN2, CIN3, CIN4, CIN5 CAP., X7R, 2.2µF, 100V, 10%, 1210 MURATA, GCJ32DR72A225KA01L 3 3 COUT1, COUT2, COUT3 CAP., X7S, 10µF, 50V, 10%, 1210 MURATA, GCM32EC71H106KA01L 4 1 COUT4 CAP., ALUM 150µF 50V 10x10 SUN ELECTRONIC INDUSTRIES CORP., 50CE150AX 5 1 C9 CAP., X7R, 1µF, 50V, 10%, 0805 MURATA, GCM21BR71H105KA01L 6 1 C10 CAP., X7R, 22µF, 10V, 10%, 1206 MURATA, GCM31CR71A226KE01L 7 1 C11 CAP., NPO, 100pF, 50V, 10%, 0603 AVX, 06035A101KAT2A 8 1 C12 CAP., X7R, 0.1µF, 50V, 10%, 0603 MURATA, GCM188R71H104KA57D 9 1 C13 CAP., X7R, 0.47µF, 16V, 10%, 0603 MURATA, GCM188R71C474KA55L 10 1 C14 CAP., X7R, 0.1µF, 50V, 10%, 0805 MURATA, GCM21BR71H104KA37L 11 1 C15 CAP., COG, 47pF, 50V, 5%, 0603 MURATA, GCM1885C1H470JA16D 12 1 C17 CAP., COG, 3300pF, 50V, 5%, 0603 MURATA, GCM1885C1H332JA16D 13 1 C18 CAP, 1.5nF, X7R, 50V,10%,0603 AVX, 06035C152KAT2A 14 1 D1 ZENER DIODE, 500mW, SOD123 ON SEMI, SZMMSZ5242BT1G/T3G 15 1 D7 SCHOTTKY DIODE, 100V, 10A, DFN5-SO-8FL ON SEMI, NRVTS10100MFST1G 16 1 D8 SWITCH DIODE, SOD323 ON SEMI., SMMDL914T1G 17 1 L1 INDUCTOR, 10µH COILCRAFT, XAL1010-103ME 18 2 Q1, Q4 FET, P-CHAN.,100V, TO-263 VISHAY, SUM90P10-19L-E3 19 1 Q2 FET, P-CHAN., POWER, TO-252 ON SEMI, SFT1345-TL-H 20 1 Q3 DIODE, IGBT MOSFET 10A, SOT23-6 DIODES INC., ZXGD3005E6TA 21 1 Q6 FET, NPN, SOT23 ON SEMI, SMMBTA42LT1G 22 2 R3, R13 RES., 100k, 1/8W, 1%, 0805 VISHAY, CRCW0805100KFKEA 23 1 R5 RES., 35.7k, 1/10W, 1%, 0603 VISHAY, CRCW060335K7FKEA 24 2 R6, R8 RES., 100Ω, 1/10W, 1%, 0603 VISHAY, CRCW0603100RFKEA 25 1 R7 RES., 6m, 3W, 1%, 1225 SUSUMU, KRL6432E-M-R006-F-T1 26 1 R9 RES., 1.0k, 1/10W, 1%, 0603 VISHAY, CRCW06031K00FKEA 27 1 R16 RES., 10Ω, 1/10W, 5%, 0805 VISHAY, CRCW080510R0JNEA 28 2 R17, R19 RES., 10k, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA 29 2 R24, R26 RES., 31.6k, 1/10W, 1%, 0603 VISHAY, CRCW060331K6FKEA 30 1 R25 RES., 205k, 1/16W, 1%, 0603 VISHAY, CRCW0603205KFKEA 31 1 U1 IC, LTC7860EMSE MSE12 LINEAR TECH.CORP. LTC7860EMSE#PBF Additional Demo Board Circuit Components 1 0 C1 CAP., OPT 8×12 OPT 2 0 C2, C3, C4, C5, C6, C8 CAP., OPT 1210 OPT 3 0 C7, C16 CAP., OPT 0603 OPT 4 0 D2, D3, D5 ZENER DIODE, OPT SOD123 OPT 5 0 D4 DIODE, OPT, DFN5-SO-8FL OPT 6 0 D6 ZENER DIODE, OPT, SOD323 OPT 7 0 L2 INDUCTOR, 1µH OPT 8 0 L3 INDUCTOR, 0.6µH OPT dc2392af 5 DEMO MANUAL DC2392A Parts List ITEM QTY 9 0 REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Q4 HEATSINK, OPT, 573100D00010G OPT 10 0 Q5 OPT, SOT363 OPT 11 0 R1, R2, R29 RES., OPT, 2512 OPT 12 3 R11, R14, R21 RES., 0Ω, 1/16W, 0603 VISHAY, CRCW06030000Z0EA 13 1 R4 RES., 1mΩ, 1%, 1W, 2512 PANASONIC, ERJ-M1WTF1M0U 14 0 R12 RES., OPT, 0805 OPT 15 0 R10, R15, R18, R20, R22, R23, R27, R28 RES., OPT, 0603 OPT Hardware: For Demo Board Only 6 1 6 E1, E2, E3, E4, E5, E6 TESTPOINT, TURRET, .094" MILL MAX, 2501-2-00-80-00-00-07-0 2 5 J1, J2, J3, J4, J5 CONN, BANANA JACK, KEYSTONE 575-4 3 4 MTGS AT 4 CORNERS STAND-OFF, SNAP ON NYLON 0.50" TALL KEYSTONE, 8833(SNAP ON) dc2392af A B C J1 E1 Q6C VFB R14 0 R13 100K 0805 D1 SZMMSZ5242B E3 VIN FREQ D6 OPT Q2 SFT1345 C8 OPT 1210 5 150uF 50V Suncon 50CE150AX (10x10mm) 15uF 100V Panasonic 100SXV15M (8x12mm) 2.2uF 100V Murata GCJ32DR72A225KA01L 10uF 50V Murata GCM32EC71H106KA01L 22uF 10V Murata GCM31CR71A226KE01L 10uH Coilcraft XAL1010-103ME 0.006 Susumu KRL6432E-M-R006-F-T1 OPT R20 R18 OPT D5 OPT R19 10K VIN-10V 8X12 OPT + C1 VIN R12 OPT 0805 100V 8x12 100SXV15M 15uF + CIN1 NOTE: UNLESS OTHERWISE SPECIFIED: ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603 50V. GND GND J3 7V - 100V VIN1 VIN1 R10 0 VIN-10V C17 3.3nF R17 10K ITH VFB SS SGND FREQ TMR R25 205K Q6 SMMBTA42L R21 0 C16 OPT 6 5 4 3 FREQ 2 1 C7 OPT R26 31.6K R24 31.6K VIN-10V 7 8 9 10 11 12 4 100 R6 100pF C11 OPT R28 D3 OPT C14 0.1uF 50V 0805 VIN-10V C13 0.47uF 16V CAP 3 5 2 OPT R15 R16 10 0805 VIN-10V 3 6 4 Q3 ZXGD3005E6TA 1 1K R9 C9 1uF 50V 0805 100 R8 2 10A 100V D7 NRVTS10100MFST XAL1010-103 L1 10uH Q4 SUM90P10-19L 3W R7 6m 1225 __ ECO 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 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. CUSTOMER NOTICE DB LT 2 SCALE = NONE APP ENG. PCB DES. APPROVALS DATE: N/A SIZE 150uF 50V VOUT VOUT SW GND GND LTC7860EMSE DC2392A Tuesday, November 17, 2015 IC NO. 1 SHEET 1 2 OF 2 REV. HIGH VOLTAGE SWITCHING SURGE STOPPER TECHNOLOGY 34.0V OUTPUT VOLTAGE LIMIT 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 100V, 500ms SURGE RIDE-THROUGH INPUT DC SURVIVAL 28V 7.0V-32.0V 100V CAP E6 J5 10Aout, Limited at 34V J4 E5 E4 DATE 09-29-15 NOMINAL INPUT 50CE150AX 10X10 DB APPROVED INPUT OPERATING RANGE 1210 COUT3 COUT2 COUT1 10uF 50V 1 + COUT4 PRODUCTION 2 VOUT DESCRIPTION REVISION HISTORY REV TITLE: SCHEMATIC CAUTION, SHOCK HAZARD: CONTACT WITH HIGH VOLTAGE CAN RESULT IN A DANGEROUS ELECTRIC SHOCK. SMMDL914 D8 VIN-10V D2 OPT C18 1.5nF VFBN RUN CAP SENSE VIN GATE U1 LTC7860EMSE VIN-10V R5 35.7K R3 100K 0805 Feedback Notes V-limit = ( R24 + R26 ) / R26 * ( 0.8V / R19 * R25 + Q6Vbe ) = 2 * ( 0.8 / 10K * 205K + 0.6 ) = 34.0Vnominal C15 47pF VIN-10V C12 0.1uF R11 C10 22uF 1206 OPT 1210 1210 100V CIN5 CIN4 2.2uF CIN3 CIN2 2.2uF 100V 4 PGND 13 D 5 A B C D DEMO MANUAL DC2392A Schematic Diagram dc2392af 7 A B C VFB Q6C VIN-10V R27 OPT R23 OPT 5 D4 OPT OPTIONAL INPUT FILTER 4 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 3 DB 3 SCALE = NONE LT PCB DES. APPROVALS OPT 2512 Q1 SUM90P10-19L R1 APP ENG. VIN OPTIONAL REV. POL. PROTECT CAP 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. 4 CUSTOMER NOTICE OPTIONAL FEEDBACK CIRCUIT FOR VOUT < 12V 2 Q5 BC857BS VIN 5 R22 OPT 1 6 4 8 3 D 5 DATE: N/A SIZE OPT 2512 R2 www.linear.com E2 VIN2 DC2392A LTC7860EMSE 2 Monday, November 16, 2015 IC NO. 1 SHEET 2 OF 2 2 REV. HIGH VOLTAGE SWITCHING SURGE STOPPER LTC Confidential-For Customer Use Only Fax: (408)434-0507 VIN2 7V - 100V J2 1 ( REVERSE POLARITY PROTECTED ) 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 C4 C5 C6 OPT 100V 1210 R29 OPT 2512 TECHNOLOGY 1m 2512 R4 OPT TITLE: SCHEMATIC C2 C3 OPT 100V 1210 L2 1uH 0.6uH OPT L3 OPTIONAL INPUT FILTER 2 A B C D DEMO MANUAL DC2392A Schematic Diagram dc2392af 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. A B C D 8x12 5 150uF 50V Suncon 50CE150AX (10x10mm) 15uF 100V Panasonic 100SXV15M (8x12mm) 2.2uF 100V Murata GCJ32DR72A225KA01L 10uF 50V Murata GCM32EC71H106KA01L 22uF 10V Murata GCM31CR71A226KE01L 10uH Coilcraft XAL1010-103ME 0.006 Susumu KRL6432E-M-R006-F-T1 NOTE: UNLESS OTHERWISE SPECIFIED: ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603 50V. 0805 R13 100K CIN2,3,4,5 4x2.2uF 100V 1210 ITH VFB SS SGND FREQ TMR R17 10K C17 3.3nF 6 5 4 3 2 1 D8 SMMDL914 VFBN RUN CAP SENSE VIN GATE 7 8 9 10 11 12 35.7K R5 100V, 500ms 34.0V SURGE RIDE-THROUGH OUTPUT VOLTAGE LIMIT 4 7.0V-32.0V 100V INPUT OPERATING RANGE INPUT DC SURVIVAL 28V C11 100pF R25 205K R26 31.6K Q6 SMMBTA42L C13 0.47uF 16V CAP 0805 R3 100K 3 R24 31.6K 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 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. 0805 R16 10 C9 1uF 50V 0805 __ ECO PROTOTYPE L1 COUT1,2,3 3x10uF 50V 1210 + COUT4 150uF 50V +VOUT J4 GND 10Aout Limited at 34V VOUT (INPUT DC SURVIVAL = -100V to +100V) D7 NRVTS10100MFST 10A 100V 10uH 7V - 100V VIN2 DAVID B. APPROVED OPTIONAL REVERSE POLARITY PROTECTION CAP Q1 SUM90P10-19L DESCRIPTION 2 1 REVISION HISTORY REV Q4 SUM90P10-19L R7 0.006 1225 3W 2 DATE 09-29-15 DAVID B. APP ENG. SCALE = NONE LT PCB DES. APPROVALS 2 DATE: N/A SIZE www.linear.com LTC Confidential-For Customer Use Only Fax: (408)434-0507 LTC7860EMSE DC2392 - Simplified Tuesday, November 17, 2015 IC NO. 1 SHEET 1 2 OF 1 REV. HIGH VOLTAGE SWITCHING SURGE STOPPER TITLE: SCHEMATIC TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 CAUTION, SHOCK HAZARD: CONTACT WITH HIGH VOLTAGE CAN RESULT IN A DANGEROUS ELECTRIC SHOCK. VIN-10V Q3 ZXGD3005E6TA 100 R6 1K R9 100 R8 +VOUT C18 1.5nF C14 0.1uF 50V 0805 CUSTOMER NOTICE Feedback Notes V-limit = ( R24 + R26 ) / R26 * ( 0.8V / R19 * R25 + Q6Vbe ) = 2 * ( 0.8 / 10K * 205K + 0.6 ) = 34.0Vnominal 10K R19 C15 47pF C12 0.1uF C10 22uF 10V U1 LTC7860EMSE NOMINAL INPUT Q2 SFT1345 FLOATING GROUND 100SXV15M CIN1 15uF 100V +VIN + D1 SZMMSZ5242B 12V GND 7V - 100Vin VIN1 +VIN 4 PGND 13 5 A B C D DEMO MANUAL DC2392A Schematic Diagram dc2392af 9 DEMO MANUAL DC2392A 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 dc2392af LT 1215 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2015