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Dual 3A Boost/Inverting/SEPIC DC/DC Converter Demonstration circuit 1734A features the dual channel LT®8582 in boost and inverting regulator configurations. The circuit is designed to convert a 5V to 10V input source to 12V at 900mA and –12V at 590mA as shown in Table 1. Table 1. Maximum Guaranteed Output Currents may be needed, subject to source impedance. DC1734A is designed to survive output short circuit events. source to drain and cut the top copper as shown in Figure 6. Technology Corporation. All other trademarks are the property of their respective owners. protected since it lacks the external disconnect MOSFET. be configured as a boost, SEPIC, inverting or flyback converter . guide for working on or modifying the demo circuit 1734A.

Figure 6. Using Channel 1 Input Disconnect Option (See Text)

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 3 C1, C2 CAP ., X5R, 10μF , 16V , 20% 1206 AVX, 1206YD106MAT2A 2 1 C9, C16 CAP ., X5R, 22μF , 16V , 20% 1206 TAIYO YUDEN, EMK316BJ226ML-T 3 2 C11, C17 CAP ., X5R, 4.7μF , 16V , 20% 1206 TAIYO YUDEN, EMK316BJ475ML-T 4 2 C4, C8 CAP ., X7R, 2.2nF , 50V , 10%, 0402 AVX, 04025C222KAT2A 5 2 C5, C10 CAP ., NPO, 100pF , 16V , 10%, 0402 AVX, 0402YA101KAT2A 6 2 C6, C7 CAP ., X7R, 0.1μF , 16V , 10% 0402 TDK, C1005X7R1C104K 7 1 C12 CAP ., X7R, 2.2μF , 25V , 10%, 0805 MURATA, GRM21BR71E225KA73L 8 1 D1 RECTIFIER, DFLS220L, PowerDI-123 DIODES/ZETEX, DFLS220L-7 9 1 D3 RECTIFIER, DFLS130L, PowerDI-123 DIODES/ZETEX, DFLS130L-7 10 1 L1 INDUCTOR, 4.7μH VISHAY, IHLP2525CZER4R7M11 11 1 L2 INDUCTOR, 10μH VISHAY, IHLP2525CZER100M11 12 1 L3 INDUCTOR, 10μH VISHAY, IHLP2020BZER100M11 13 1 Q1 P-CH MOSFET , FDMC510P , POWER-33 FAIRCHILD, FDMC510P 14 1 R1 RES., CHIP , 6.04k, 1/16W , 1% 0402 VISHAY, CRCW04026K04FKED 15 1 R3 RES., CHIP ,130k, 1/10W , 1%, 0603 NIC, NRC06F1303TRF 16 2 R4, R11 RES., CHIP , 232k, 1/8W , 1%, 0805 VISHAY, CRCW0805232KFKEA 17 1 R5 RES., CHIP , 8.06k, 1/16W , 1% 0402 VISHAY, CRCW04028K06FKED 18 2 R8, R10 RES., CHIP , 80.6k, 1/16W , 1% 0402 VISHAY, CRCW040280K6FKED 19 3 R6, R9, R13 RES., CHIP , 100k, 1/16W , 5% 0402 NIC, NRC04J104TRF 20 1 R12 RES., CHIP , 16.9k, 1/16W , 1% 0402 VISHAY, CRCW040216K9FKED 21 1 R15 RES., CHIP ,143k, 1/10W , 1%, 0603 NIC, NRC06F1433TRF 22 1 R16 RES., CHIP , 0Ω, 1/4W , 1206 NIC, NRC12ZOTR 23 1 U1 IC., L T8582EDKD, DFN-24(7MMX4MM) LINEAR TECH., L T8582EDKD Additional Demo Board Circuit Components 1 0 C3, C14 CAP ., 0603, OPTION 2 0 C13 CAP ., 1206, OPTION 3 0 C15 CAP ., SMD 8X10.5 & THRU HOLE 8X9.5, OPTION 4 0 D2 DIODE, SOD-323, OPTION 5 0 Q2 MOSFET , POWER-33, OPTION 6 0 R2 RES., CHIP , 0402, OPTION 7 0 R7, R14 RES., CHIP , 0805, OPTION Hardware for Demo Board Only 1 9 E1-E9 TESTPOINT , TURRET , .094" pbf MILL-MAX, 2501-2-00-80-00-00-07-0 2 2 JP1, JP2 3 PIN 0.079 SINGLE ROW HEADER SAMTEC, TMM103-02-L-S 3 2 XJP1, XJP2 SHUNT , .079" CENTER SAMTEC, 2SN-BK-G 4 4 (STAND-OFF) STAND-OFF , NYLON 0.25" KEYSTONE, 8831(SNAP ON) 5 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1734A

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

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 1111 • PRINTED IN USA DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (L TC) 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 ONL Y and is not provided by L TC 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 Europ ean 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 L TC fro m 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 co mpliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. L TC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. L TC 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 L TC applica- tion engineer . Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation