DEMO MANUAL DC2113A LTC3649, 60V, Low IQ Monolithic High Efficiency Step-Down Regulator DESCRIPTION Demonstration circuit 2113A is a high input voltage, high efficiency synchronous monolithic buck converter featuring the LTC®3649. The DC2113A has wide input voltage range from 3.1V up to 60V. The output voltage of the DC2113A can be set as to 3.3V or 5V. However, “USER SELECT” option of DC2113A allows output voltage to be as high as input voltage minus 0.5V, with certain modifications. DC2113A is capable of delivering up to 4A of output current. DC2113A supports three operation modes: Fixed-Frequency modulation, Burst Mode® operation and the user can synchronize it with external clock also. Fixed-Frequency mode of operation maximizes the output current, reduces output voltage ripple, and yields a low noise switching spectrum. Burst Mode operation employs a variable frequency switching algorithm that minimizes the no-load input quiescent current and improves efficiency at light loads. PERFORMANCE SUMMARY PARAMETER The DC2113A consumes less than 15µA of quiescent current during shutdown and it consumes less than 440µA at no load conditions in Burst Mode operation. The DC2113A has a standard operating frequency of 500kHz, but can be adjusted in a range between 300kHz and as high as 3MHz. DC2113A is a monolithic step-down converter, LTC3649 integrates top and bottom N-channel MOSFETs, significantly reducing circuit footprint. DC2113A was designed to support multiple footprints of input/output capacitors and inductor to accommodate variety of applications. The data sheet of LTC3649 gives a complete description functionality of this regulator; also contains operation and application information and must be read in conjunction with this demo board manual for DC2113A. Design files for this circuit board are available at http://www.linear.com/demo/DC2113A L, LT, LTC, LTM, Burst Mode, 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 CONDITIONS VALUE Minimum Input Voltage 4V Maximum Input Voltage 60V Output Voltage VOUT Regulation VIN = 4V – 60V 5V ± 2% or 3.3V ± 2% Maximum Continuous Output Current VOUT 4A Preset Operating Frequency R10 = 200kΩ 500kHz External Clock Sync. Frequency Range 300kHz – 3MHz Efficiency VIN = 12V, VOUT = 5V, IOUT = 4A VIN = 12V, VOUT = 3.3V, IOUT = 4A 97% 97% Typical Output Ripple VOUT VIN = 12V, VOUT = 5V, IOUT = 4A (20MHz BW) <15mVP-P Quiescent Current at Shutdown VIN = 4V – 60V <14µA Input Current at No Load VIN = 4V – 60V, Burst Mode Operation <430µA dc2113afb 1 DEMO MANUAL DC2113A QUICK START PROCEDURE Demonstration circuit 2113A is easy to set up to evaluate the performance of the LTC3649. For proper measurement equipment configuration, set up the circuit according to the diagram in Figure 1. Before proceeding to test, insert shunt into JP2 (RUN) into OFF position, which connects the RUN pin to ground (GND), and thus, shut down the output. Set jumper JP1 (MODE) into FCC (forced counties conduction mode) position. Set jumper JP3 (VOUT) into 5.0V position. 2.Turn on VOUT of the circuit by inserting the shunt in header JP2 (RUN) into the ON position. The output voltage should be regulating. Measure VOUT – it should measure 5.0V ± 2% (Do not apply more than the rated maximum voltage of 60V to the board or the part may be damaged). Vary the VOUT load, which should not exceed 4A. Vary the input voltage from 6V – 55V, the VOUT – it should measure 5.0V ± 2%. 3.Set JP2 (RUN) into OFF and then jumper JP3 (VOUT) into 3.3V position. 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 2 for proper scope probe technique. 4.Turn on VOUT2 of the circuit by inserting the shunt in header JP2 (RUN) into the ON position. The output voltage should be regulating. Measure VOUT – it should measure 3.3V ± 2% (Do not apply more than the rated maximum voltage of 60V to the board or the part may be damaged). Vary the VOUT load, which should not exceed 4A. Vary the input voltage from 16V – 55V, the VOUT – it should measure 3.3V ± 2% 1.With the DC2113A set up according to the proper measurement and equipment in Figure 1, apply 12V at VIN. Measure VOUT; it should read 0V. If desired, one can measure the shutdown supply current at this point. The supply current will be approximately 14µA, or less, in shutdown. + – 5. Set output current to zero and move jumper JP1 (MODE) into BURST position and measure VOUT for 3.3V. 6. Set output current to zero and move jumper JP1 (MODE) into BURST position and measure VOUT for 5.0V. + SUPPLY + – – – – + + Figure 1. Proper Measurement Equipment Setup 2 LOAD + – dc2113afb DEMO MANUAL DC2113A QUICK START PROCEDURE GND VIN Figure 2. Measuring Input or Output Ripple 100 95 90 % 85 80 75 70 65 60 0 1 2 3 LOAD CURRENT (A) 4 dc2113 F02 Figure 3. Efficiency vs Input Voltage and Load Current, VOUT 5V, Burst Mode Operation Figure 4. Thermal Map, VIN 60V, IOUT1 5V at 4.0A. No Air Flow dc2113afb 3 DEMO MANUAL DC2113A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 2 CIN1, CIN2 CAP, 1210 10μF 10% 63V X7R MURATA GRM32ER71J106KA12L 2 1 CIN3 CAP, 10μF 20% 63V ELEC SUN ELECT. 63CE10KX 3 2 CIN4, C7 CAP, 0805 1μF 10% 100V X7S TDK C2012X7S2A105K 4 2 COUT1, COUT2 CAP, 1210 22μF 10% 25V X7R MURATA GRM32ER71E226KE15L 5 1 COUT3 CAP, 3528 150μF 20% 6.3V POSCAP PANASONIC 6TPE150MAZB 6 1 CTH CAP, 0603 4700pF 10% 25V X7R AVX 06033C472KAT2A 7 1 CTHP CAP, 0603 10pF 5% 25V C0G AVX 06033A100JAT2A 8 1 CVCC CAP, 0805 2.2μF 10% 16V X7R AVX 0805YC225KAT2A 9 1 C1 CAP, 0603 0.01μF 10% 50V X7R AVX 06035C103KAT4A 10 1 C5 CAP, 0603 1μF 10% 16V X5R AVX 0603YD105KAT2A 11 1 C6 CAP, 0603 0.1μF 10% 50V X7R AVX 06035C104KAT2A 12 1 L1 IND, 5.6μH COILCRAFT XAL5050-562MEB 13 1 RIMON RES, 0603 10.0kΩ 1% 1/10W VISHAY CRCW060310K0FKEA 14 1 RTH RES, 0603 1.0kΩ 1% 1/10W VISHAY CRCW06031K00FKEA 15 1 R2 RES, 0603 10MΩ 1% 1/10W VISHAY CRCW060310M0FKEA 16 1 R3 RES, 0603 100kΩ 1% 1/10W VISHAY CRCW0603100KFKEA 17 1 R5 RES, 0603 10kΩ 5% 1/10W VISHAY CRCW060310K0JNEA 18 1 R10 RES, 0603 340kΩ 1% 1/10W VISHAY CRCW0603340KFKEA 19 1 R13 RES, 0603 100kΩ 5% 1/10W VISHAY CRCW0603100KJNEA 20 1 R14 RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA 1 R17 RES, 0603 100Ω 1% 1/10W VISHAY CRCW0603100RFKEA 21 1 R18 RES, 0805 1MΩ 1% 1/8W VISHAY CRCW08051M00FKEA 22 1 R25 RES, 0603 1MΩ 1% 1/10W VISHAY CRCW06031M00FKEA 1 R27 RES, 0603 10Ω 1% 0.1W VISHAY CRCW060310R0FKEA 1 R26 RES, 0603 137kΩ 1% 0.063W VISHAY CRCW0603137KFKEA 23 24 1 R28 RES, 0603 196kΩ 1% 1/10W VISHAY CRCW0603196KFKEA 25 1 U1 IC, SYNCHRONOUS BUCK REGULATOR LINEAR TECH. LTC3649EFE28#PBF-ES R1, R19, R21, R29, R30, R31 RES, 0603 OPTION OPTION R22 RES, 0805 OPTION VISHAY CRCW08051M00FKEA C3,C4 CAP, 0603 OPTION OPTION CIN5 CAP, OPTION OPTION E1, E2, E3, E4, E5, E6, E7, E8 TURRET MILL MAX 2501-2-00-80-00-00-07-0 Additional Demo Board Circuit Components Hardware 11 E9, E10, E12 4 3 JP1, JP2, JP3 HEADER, 3-PIN, DBL ROW 2mm SULLINS, NRPN032PAEN 4 MH1, MH2, MH3, MH4 STANDOFF, SNAP ON KEYSTONE 8833 3 XJP1, XJP2, XJP3 SHUNT SAMTEC 2SN-BK-G dc2113afb 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. 1 2 3 E9 E12 E1 E2 E7 5 3 1 R13 100k 6 2 6 4 4 1. ALL CAPACITORS AND RESISTORS ARE 0603. 2. ALL RESISTORS ARE 5%. A 2 OFF 5 JP2 RUN JP1 MODE B C4 OPT OPT C3 CTH 4.7nF NPO RTH 1k 1% CIMON 470pF R2 10M 1% BURST EXT FCC R30 OPT OPT 1% R17 100 VOUT 4 3 2 1 12 11 8 10 9 16 GND GND GND GND PGDFB PGOOD RUN MODE/SYNC SGND VOUT IMON RT ITH ISET INTVCC GND EXTVCC BOOST SW SW SW SW SW SW SW VIN VIN VINREG C THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE R26 137k 1% R25 1M 1% 15 18 17 200k 1% 13 R10 1uF C5 C6 0.1uF i ^ SCALE = NONE `\ PCB DES. L1 5.6uH CIN1 10uF 63V 1210 R22 OPT 0805 CIN2 10uF 63V 1210 R21 OPT DATE E5 E4 E3 GND GND D DATE: Tuesday, February 09, 2016 E SHEET 1 HIGH VOLTAGE, MONOLITHIC SYNCHRONOUS BUCK REGULATOR SIZE IC NO. LTC3649EFE#PBF-ES N/A DEMO CIRCUIT 2113A 3 REV. OF 1 LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 EXTVCC E10 E6 i ^ APPROVED VIN 60V MAX 11/13/15 E VOUT COUT3 5V AT 4.0A + 150uF 10uF 63V + CIN3 COUT2 22uF 10V 1206 VOUT OPT + CIN5 TECHNOLOGY TITLE: SCHEMATIC R27 10 VOUT COUT1 22uF 10V 1206 CIN4 1uF 0805 100V VIN PROD R5 10k DESCRIPTION 3 REVISION HISTORY REV D COILCRAFT XAL5050-562MEB C7 1uF 0603\0805 100V APP ENG. 5 19 21 22 23 24 25 26 27 28 6 7 14 20 CVCC 2.2uF 0805 ECO APPROVALS INTVCC U1 LTC3649EFE#PBF-ES C 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. VOUT CTHP 10pF NPO C1 0.01uF 6 USER SELECT 4 3.3V 2 5.0V OPT INTVCC JP3 VOUT R1 R31 OPT EXT I/O 3 R18 1M 1% 0805 ON 1 VIN INTVCC OPT R19 R14 0 RIMON 10.0k 1% NOTES: UNLESS OTHERWISE SPECIFIED, PGOOD GND EXT I/O GND EXT_SYNC IMON E8 3 1 1% 5 1% R29 196k R28 100k R3 B SGND 29 4 A 1 2 3 4 DEMO MANUAL DC2113A SCHEMATIC DIAGRAM dc2113afb 5 DEMO MANUAL DC2113A 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 6 dc2113afb Linear Technology Corporation LT 0216 REV B • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2015