DEMO MANUAL DC2186A LT8580 Boost/SEPIC/Inverting Regulator Description Demonstration circuits 2186A-A and 2186A-B feature the LT8580EDD in boost/inverting 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 120mA. The inverter converts a 5V to 12V source to –12V at 150mA. Please refer to Figures 4 and 5 below for maximum load current at different input voltage levels. Both converters use only one feedback resistor to set the output voltage. The LT®8580 can operate with inputs as high as 40V but in these demo circuits, the input is limited by the voltage rating of the input capacitors, and the magnitude of the boost output voltage. DC2186 includes an optional charge pump circuit on the back of the board, for higher output voltages. If this circuit is used, remove R11 and recalculate the feedback resistor. The same output node will have the output of the charge pump. The LT8580 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, SEPIC or inverting converter. The data sheet gives a complete description of the device, operation and application information. The data sheet must be read in conjunction with this demo manual for DC2186A. Design files for this circuit board are available at http://www.linear.com/demo/DC2186A 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. Performance Summary DC2186A-A SYMBOL PARAMETER VIN Input Supply Range VOUT Output Voltage Range Specifications are at TA = 25°C CONDITIONS MIN TYP 3 VIN = 3V, ILOAD = 120mA 11.64 MAX 10 12 12.36 UNITS V V RIPPLE VIN = 3V, ILOAD = 120mA 25 mV EFFICIENCY VIN = 5V, ILOAD = 200mA 88 % 1.5 MHz SWITCHING FREQUENCY Performance Summary DC2186A-B SYMBOL PARAMETER VIN Input Supply Range VOUT Output Voltage Range Specifications are at TA = 25°C CONDITIONS TYP 5 VIN = 5V, ILOAD = 150mA RIPPLE VIN = 5V, ILOAD = 150mA EFFICIENCY VIN = 12V, ILOAD = 200mA SWITCHING FREQUENCY MIN –11.64 MAX 12 –12 5 –12.36 UNITS V V mV 82 % 1.5 MHz dc2186af 1 DEMO MANUAL DC2186A Quick Start Procedure DC2186A is easy to set up to evaluate the performance of the LT8580. Refer to Figures 1 and 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 Figure 3 for proper scope probe technique. 1.With power off, connect the input power supply to VIN and GND. 2.Turn on the power at the input. NOTE: Make sure that the input voltage does not exceed 10V for DC2186A-A and 12V for DC2186A-B. 3.Check for the proper output voltage. NOTE: If there is no output, temporarily disconnect the load to make sure that the load is not set too high. 4.Once the proper output voltages are established, adjust the load within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other parameters. Figure 1. DC2186A-A Proper Equipment Setup 2 dc2186af DEMO MANUAL DC2186A Quick Start Procedure Figure 2. DC2186A-B Proper Equipment Setup GND VIN Figure 3. Measuring Input or Output Ripple dc2186af 3 DEMO MANUAL DC2186A Quick Start Procedure 450 240 400 220 350 200 LOAD (mA) LOAD (mA) 300 250 200 150 160 140 100 120 50 0 180 3 4 5 6 7 INPUT (V) 8 9 100 10 5 6 DC2186A F04 Figure 4. DC2186A-A Maximum Load Current vs Input Voltage 80 90 EFFICIENCY (%) EFFICIENCY (%) 60 50 40 30 12 70 60 50 40 30 20 20 15 30 45 60 75 90 105 OUTPUT CURRENT (mA) 10 120 50 100 150 200 250 300 350 400 450 OUTPUT CURRENT (mA) DC2186A F07 DC2186A F06 Figure 6. DC2186A-A Efficiency at 3VIN Figure 7. DC2186A-A Efficiency at 10VIN 90 90 80 80 70 70 EFFICIENCY (%) EFFICIENCY (%) 11 80 70 60 50 40 60 50 40 30 30 20 20 15 30 45 60 75 90 105 120 135 150 OUTPUT CURRENT (mA) DC2186A F08 Figure 8. DC2186A-B Efficiency at 5VIN 4 10 Figure 5. DC2186A-B Maximum Load Current vs Input Voltage 100 10 8 9 INPUT (V) DC2186A F05 90 10 7 10 25 50 75 100 125 150 175 200 225 OUTPUT CURRENT (mA) DC2186A F09 Figure 9. DC2186A-B Efficiency at 12VIN dc2186af DEMO MANUAL DC2186A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC2186A-A Required Circuit Components 1 2 C4, C11 CAP., X7R, 4.7µF, 16V, 10% 1206 MURATA, GRM31CR71C475KA01L 2 1 C5 CAP., X7R, 0.1µF, 16V, 10% 0603 MURATA, GRM188R71C104KA01D 3 1 C6 CAP., X7R, 0.1µF, 16V, 10% 0402 MURATA, GRM155R71C104KA88D 4 1 C7 CAP., X7R, 3.3nF, 16V, 10% 0603 AVX, 0603YC332KAT2A 5 1 C8 CAP., C0G, 47pF, 16V, 5% 0402 MURATA, GRM1555C1E470JA01D 6 1 D1 DIODE, DFLS130L PowerDI123 DIODES., DFLS130L-7 7 1 L1 INDUCTOR, 15µH, SD18 COOPER, SD18-150-R 8 2 R1, R11 RES., CHIP., 0Ω, 1/8W, 0805 VISHAY, CRCW08050000Z0EA 9 1 R2 RES., CHIP., 130k, 1/10W, 1%, 0603 VISHAY, CRCW0603130KFKEA 10 1 R5 RES., CHIP., 6.04k, 1/10W, 1%, 0603 VISHAY, CRCW06036K04FKEA 11 1 R4 RES., CHIP., 10k, 1/8W, 1%, 0805 VISHAY, CRCW080510K0FKEA 12 1 R6 RES., CHIP., 56.2k, 1/10W, 1%, 0603 VISHAY, CRCW060356K2FKEA 13 1 R8 RES., CHIP., 100k, 1/8W, 1%, 0805 VISHAY, CRCW0805100KFKEA 14 1 R12 RES., CHIP., 11.3k, 1/8W, 1%, 0805 VISHAY, CRCW080511K3FKEA 15 1 U1 IC., LT8580EDD 8L DFN LINEAR TECH., LT8580EDD#TRPBF Additional Demo Board Circuit Components 1 0 C9 (OPT) CAP., 0805 2 0 C10 (OPT) CAP., 1206 3 0 D3, D4 (OPT) DIODE, Di123 4 0 C1 (OPT) CAP., 0805 5 0 D2 (OPT) DIODE, PowerDI123 6 0 L2 (OPT) INDUCTOR 7 0 R9, R10 (OPT) RES., CHIP., 0805 Hardware: For Demo Board Only 1 6 E1-E6 TESTPOINT, TURRET, .094" PBF MILL-MAX, 2501-2-00-80-00-00-07-0 2 4 MH1-MH4 STAND-OFF, NYLON 0.25" KEYSTONE, 8831(SNAP ON) dc2186af 5 DEMO MANUAL DC2186A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC2186A-B Required Circuit Components 1 1 C1 CAP., X5R, 1µF, 25V, 10% 0805 AVX, 08053D105KAT2A 2 2 C4, C11 CAP., X7R, 4.7µF, 16V, 10% 1206 MURATA, GRM31CR71C475KA01L 3 1 C5 CAP., X7R, 0.1µF, 16V, 10% 0603 MURATA, GRM188R71C104KA01D 4 1 C6 CAP., X7R, 0.1µF, 16V, 10% 0402 MURATA, GRM155R71C104KA88D 5 1 C7 CAP., X7R, 2.2nF, 16V, 10% 0603 AVX, 0603YC222KAT2A 6 1 C8 CAP., C0G, 47pF, 16V, 5% 0402 MURATA, GRM1555C1E470JA01D 7 1 D2 DIODE, DFLS130L PowerDI123 DIODES., DFLS130L-7 8 2 L1, L2 INDUCTOR, 33µH, SD18 COOPER, SD18-330-R 9 2 R1, R11 RES., CHIP., 0Ω, 1/8W, 0805 VISHAY, CRCW08050000Z0EA 10 1 R2 RES., CHIP., 143k, 1/10W, 1%, 0603 VISHAY, CRCW0603143KFKEA 11 1 R4 RES., CHIP., 10k, 1/8W, 1%, 0805 VISHAY, CRCW080510K0FKEA 12 1 R5 RES., CHIP., 20k, 1/10W, 1%, 0603 VISHAY, CRCW060320K0FKEA 13 1 R6 RES., CHIP., 56.2k, 1/10W, 1%, 0603 VISHAY, CRCW060356K2FKEA 14 1 R8 RES., CHIP., 100k, 1/8W, 1%, 0805 VISHAY, CRCW0805100KFKEA 15 1 R12 RES., CHIP., 22.1k, 1/8W, 1%, 0805 VISHAY, CRCW080522K1FKEA 16 1 U1 IC., LT8580EDD 8L DFN LINEAR TECH., LT8580EDD#TRPBF Additional Demo Board Circuit Components 1 0 C9 (OPT) CAP., 0805 2 0 C10 (OPT) CAP., 1206 3 0 D3, D4 (OPT) DIODE, Di123 4 0 D1 (OPT) DIODE, PowerDI123 5 0 R9, R10 (OPT) RES., CHIP., 0805 Hardware: For Demo Board Only 1 6 E1-E6 TESTPOINT, TURRET, .094" PBF MILL-MAX, 2501-2-00-80-00-00-07-0 2 4 MH1-MH4 STAND-OFF, NYLON 0.25" KEYSTONE, 8831(SNAP ON) 6 dc2186af 1 2 GND SHDN 5 C11 4.7uF 16V 1206 SHDN SYNC R4 SYNC 10K E6 0805 R8 100K SHDN *0805 R12 R1 0 0805 VIN C6 0.1uF L1 * 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. 12V / 120mA - 450mA -12V / 150mA - 230mA 3V - 10V 5V - 12V DC2186A-A DC2186A-B B VOUT VIN * 4 SW * VC FB D1 D1 * 2 * * D2 VB NOT USED DFLS130L NOT USED D2 * C1 * L2 1uF, 25V 2.2nF 3.3nF C7 SW * SD18-330-R SD18-330-R A NOT USED R10 OPT 0805 SD18-150-R VB 1 D4 OPT L2 OPT 0805 OPT 0805 C4 4.7uF 16V 1206 0 0805 R11 L1 C9 R9 0603 R2 VOUT OPTIONAL CIRCUIT C8 47pF NOT USED 0603 C7 R5 U1 LT8580EDD 0603 2 1 0805 C1 1 1 2 SW DFLS130L R6 56.2K 0603 ASSEMBLY TYPE VERSION TABLE 1. ALL RESISTORS ARE 0402. ALL CAPACITORS ARE 0402. NOTE: UNLESS OTHERWISE SPECIFIED E3 E2 E1 3 SYNC 8 SS 7 RT 6 GND 9 VIN* VIN A 2 1 B D3 OPT 143K 130K R2 2 E5 E4 R5 20K 6.04K C10 OPT 1206 VOUT C5 0.1uF 16V 0603 VOUT * 22.1K 11.3K R12 GND VOUT 1 2 DEMO MANUAL DC2186A Schematic Diagram dc2186af 7 DEMO MANUAL DC2186A 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 dc2186af Linear Technology Corporation LT 0914 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2014