DEMO MANUAL DC1144A LT3580EDD Boost/ Inverting Regulator DESCRIPTION Demonstration circuits 1144A-A and 1144A-B feature the LT®3580EDD in Boost/Inverting Regulator configurations. The demo circuits demonstrate small size and low component count. The boost is designed to convert a 3V to 10V source to 12V at 300mA while the inverter converts a 5V to 12V source to –12V at 350mA. Both converters use only one feedback resistor to set the output voltage. linear regulator built into the board that will allow the IC to be powered from a lower voltage. If this option is used, just cut the trace as shown in Figure 6 and install the optional emitter follower regulator on the back of the board. The LT3580 operates with inputs as high as 32V but in these demo boards the input is limited by the voltage rating of the input capacitors and the magnitude of the boost output. In a boost converter the input needs to be less than the output. The LT3580 includes many other features such as Synchronization to external clock, User Configurable Undervoltage Lockout, Soft-start, Frequency Foldback, and it is easily configured as boost or inverting converter. Care must be taken when operating the LT3580 at high input voltages as the junction temperature increases due to higher internal dissipation. Higher switching frequencies also increase the internal dissipation. The LT3580 gets powered from the main input in both, DC1144A-A and DC1144A-B, but there is an option for a PERFORMANCE SUMMARY The DC1144A-B can easily be configured into a SEPIC converter, just switch the positions of L2 and D2 as shown in Figure 6. These circuits are intended for space-conscious applications such as Local Bias Supplies, TFT-LCD Bias Supplies, GPS Receivers, VFD Bias Supplies and DSL Modems. Design files for this circuit board are available at http://www.linear.com/demo/DC1144A 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 Performance Summary DC11144A-A SYMBOL PARAMETER VIN Input Supply Range VOUT Output Voltage Range CONDITIONS MIN VIN = 3V, ILOAD = 300mA 11.64 TYP MAX 10 V 12 12.36 V 3 UNITS Ripple VIN = 3.6V, ILOAD = 300mA 40 Efficiency VIN = 4.2V, ILOAD = 350mA 88 % 1 MHz Switching Frequency mV Performance Summary DC11144A-B SYMBOL PARAMETER VIN Input Supply Range VOUT Output Voltage Range CONDITIONS MIN TYP 5 VIN = 5V, ILOAD = 350mA –11.64 –12 MAX UNITS 12 V –12.36 V Ripple VIN = 5V, ILOAD = 350mA 10 mV Efficiency VIN = 5V, ILOAD = 350mA 80 % 2 MHz Switching Frequency dc1144af 1 DEMO MANUAL DC1144A QUICK START PROCEDURE Demonstration circuit 1144A is easy to set up to evaluate the performance of the LT3580EDD. Refer to Error! Reference source not found. and Figure 2 for proper measurement equipment setup and follow the procedure below: NOTE: When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the input or output voltage ripple by touching the probe tip directly across the VIN or VOUT and GND terminals. See Error! Reference source not found. for proper scope probe technique. 1. Place jumpers in the following positions: JP1 ON 2. With power off, connect the input power supply to VIN and GND. 3. Turn on the power at the input. 4. Check for the proper output voltages. NOTE: If there is no output, temporarily disconnect the load to make sure that the load is not set too high. 5. Once the proper output voltage is established, adjust the load within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other parameters. Figure 1. Proper Measurement Equipment for DC1144A-A 2 dc1144af DEMO MANUAL DC1144A QUICK START PROCEDURE Figure 2. Proper Measurement Equipment for DC1144A-B GND VIN Figure 3. Measurement Input and Output Ripple dc1144af 3 DEMO MANUAL DC1144A QUICK START PROCEDURE 90 80 70 70 EFFICIENCY (%) EFFICIENCY (%) 80 60 50 50 40 40 30 60 0 50 100 150 200 250 300 350 400 450 500 OUTPUT CURRENT (mA) 1144A F04 Figure 4. Boost Converter Efficiency at 4.2VIN 30 0 40 60 120 160 200 240 300 340 400 OUTPUT CURRENT (mA) 1144A F05 Figure 5. Inverting Regulator Efficiency at 5VIN Figure 6. Optional Modifications to Convert DC1144A-B to ZEPIC Converter and/or Use Separate Regulator to Bias IC 4 dc1144af DEMO MANUAL DC1144A PARTS LIST QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components for Boost Converter 1 C2 CAP., X5R, 4.7μF, 16V, 20% 1206 TAIYOYUDEN, EMK316BJ475ML 1 C4 CAP., X5R, 10μF, 25V, 20% 1206 TAIYOYUDEN, TMK316ABJ106ML-T 1 C7 CAP., X7R, 1000pF, 16V, 10% 0402 MURATA, GRM155R71C102KA01D 1 D1 DIODE, SCHOTTKY RECTIFIER 2A, POWER D123 DIODES INC., DFLS220L-7 1 L1 INDUCTOR, 6.8μH SUMIDA, CDRH5D16NP-6R8NC 1 R2 RES., CHIP, 130k, 1/6W, 1% 0402 VISHAY, CRCW0402133KFKED 1 R5 RES., CHIP, 20k, 1/16W, 1% 0402 VISHAY, CRCW040220K0FKED 1 R6 RES., CHIP, 84.5k, 1/6W, 1% 0402 VISHAY, CRCW040284K5FKED 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1144A-A 1 C6 CAP., X7R, 0.1μF, 16V, 10% 0402 AVX, 0402YC104KAT2A 1 U1 LT3580EDD, 8-LEAD PLASTIC DFN (3X3) LINEAR TECH., LT3580EDD#PBF Additional Demo Board Circuit Components 0 C3 (OPT) CAP., 0402 1 C5 CAP., X7R, 0.1μF, 16V, 10% 0603 0 C8 (OPT) CAP., 0402 0 D3 (OPT) AVX, 0603YC104KAT2A 6 TP1-TP6 TESTPOINT, TURRET MILL MAX 2501-2-00-80-00-00-07-0 1 JP1 0.079 SINGLE ROW HEADER, 3 PIN SAMTEC, TMM103-02-L-S 1 XJP SHUNT SAMTEC, 2SN-BK-G 0 Q2 (OPT) 2 R4, R8 RES., CHIP, 100k, 1/10W, 1% 0805 VISHAY, CRCW0805100KFKEA 0 R9 (OPT) Required Circuit Components for Inverting Regulator 1 C1 CAP., X5R,1μF, 25V,10%, 0805 AVX, 08053D105KAT 1 C2 CAP., X5R, 4.7μF, 16V, 20% 1206 TAIYOYUDEN, EMK316BJ475ML 1 C4 CAP., X5R, 10μF, 25V, 20% 1206 TAIYOYUDEN, TMK316ABJ106ML-T 1 C6 CAP., X5R, 0.1μF, 16V, 10% 0402 AVX, 0402YC104KAT2A 1 C7 CAP., X7R, 2200pF, 16V, 10% 0402 MURATA, GRM155R71C222KA01D 1 C8 CAP., NPO, 100pF, 25, 10%, 0402 AVX, 04023A101KAT2A 1 D2 DIODE, SCHOTTKY RECTIFIER 2A, POWER D123 DIODES INC., DFLS130L-7 1 L1 INDUCTOR, 8.2μH COOPER BUSSMANN, SD25-8R2-R 1 L2 INDUCTOR, 15μH COOPER BUSSMANN, SD14-150-R 1 R2 RES., CHIP, 143k, 1/6W, 1% 0402 VISHAY, CRCW0402143KFKED 1 R5 RES., CHIP, 20k, 1/16W, 1% 0402 VISHAY, CRCW040220K0FKED 1 R6 RES., CHIP, 42.2k, 1/6W, 1% 0402 VISHAY, CRCW040242K2FKED FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1144A-B LT3580EDD, 8-LEAD PLASTIC DFN (3X3) LINEAR TECH., LT3580EDD#PBF 1 1 U1 dc1144af 5 DEMO MANUAL DC1144A PARTS LIST QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Additional Demo Board Circuit Components 6 0 C3 (OPT) CAP., 0402 1 C5 CAP., X7R, 0.1μF, 16V, 10% 0603 AVX, 0603YC104KAT2A 0 D3 (OPT) 6 TP1-TP6 TESTPOINT, TURRET MILL MAX 2501-2-00-80-00-00-07-0 1 JP1 0.079 SINGLE ROW HEADER, 3 PIN SAMTEC, TMM103-02-L-S 1 XJP SHUNT SAMTEC, 2SN-BK-G 0 Q2 (OPT) 2 R4, R8 RES., CHIP, 100k, 1/10W, 1% 0805 VISHAY, CRCW0805100KFKEA 0 R9 (OPT) dc1144af 1 2 GND TP6 TP3 OFF ON TP1 1 R4 100K JP1 shdn SHDN 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. B 1uF, 25V DFLS130L NOT USED -12V@350mA 5V to 12V C1 DC1144A-B D2 2 1 NOT USED D1 * VC FB NOT USED R8 100K C6 0.1uF R6 LT3580EDD U1 2 DFLS220L VOUT sync 5 * C1 * 12V@300mA TP4 Q2 OPT 1 C2 4.7uF 16V 1206 1 D1 3V to 10V VIN SYNC D3 OPT R9 OPT L1 DC1144A-A ASSEMBLY TYPE * 3 2 Output VERSION TABLE SHDN VIN * 3 2 * 1 2 VIN VIN 4 SW 3 SYNC 8 SS 7 RT 6 GND 9 B 1nF C7 * 2.2nF * C7 R5 20K * D2 L2 OPT L1 C4 10uF 25V 1206 100pF A SD25-8R2 NOT USED CDRH5D16-6R8 C8 C8 * * R2 C3 A L2 TP5 C5 0.1uF 16V 0603 TP2 SD14-150 NOT USED VOUT 143K 130K R2 GND VOUT * 42.2K 84.5K R6 1 2 DEMO MANUAL DC1144A SCHEMATIC DIAGRAM dc1144af 7 DEMO MANUAL DC1144A 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 8 dc1144af Linear Technology Corporation LT 0115 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2015