DEMO MANUAL DC823B-A LTM4600: 20V, 10A Step-Down Power Module(R) Regulator DESCRIPTION Demonstration circuit DC823B-A features the LTM(R)4600EV, a 10A high efficiency, high density switch mode step-down power module. The input voltage is from 4.5V to 20V. The output voltage is programmable from 0.6V to 5V. The rated load current is 10A, while derating is necessary for different VIN, VOUT, and thermal conditions. Integrated input and output filters enable a simple PCB layout. Only bulk input and output capacitors are needed. PERFORMANCE SUMMARY PARAMETER The LTM4600 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC823B-A. Design files for this circuit board are available at http://www.linear.com/demo L, LT, LTC, LTM, Module, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. (TA = 25C) TEST CONDITION Input Voltage Range VALUE 4.5V to 20V Output Voltage VOUT Selectable with Jumpers (Open for 0.6V) 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V Maximum Continuous Output Current 5V to 20VIN, 1.5VOUT 10 ADC Efficiency VIN = 12V, VOUT = 1.5V, IOUT = 10A 82%, See Figure 2 BOARD PHOTO dc823baf 1 DEMO MANUAL DC823B-A QUICK START PROCEDURE Demonstration circuit DC823B-A is an easy way to evaluate the performance of the LTM4600EV. Refer to Figure 1 for proper measurement equipment set-up and follow the procedure below: 3.Turn on the power at the input. The output voltage should be 1.5V 2%. 4. 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. Output voltage ripple should be measured at J6 with a BNC cable. 1.Place jumpers in the following positions for a typical 1.5VOUT application: FCB RUN/SS VOUT Select CCM ON 1.5V 5.For optional load transient test, apply an adjustable pulse signal between IOSTEP CLK and GND pins. Pulse amplitude sets the current step. The pulse signal should have very small duty cycle (<15%) to limit the thermal stress of the transient load circuit. The output transient current can be monitored at BNC connector J5 (10mV/A). 2.With power off, connect the input power supply, load, optional 5V bias supply and meters as shown in Figure 1. Preset the load to 0A and VIN supply to be less than 20V. The optional 5V bias supply applied to the EXTVCC pin must be off while the main VIN is turned off. + + - A V - LOAD - 0A TO 10A + - + - + A - V + + - dc823ba FO1 Figure 1. Test Set-Up of DC823B-A (EXTVCC VBIAS Supply is Optional) dc823baf 2 DEMO MANUAL DC823B-A QUICK START PROCEDURE Efficiency vs Load Current with 5VIN (FCB = 0) Efficiency vs Load Current with 12VIN (FCB = 0) 100 100 90 90 80 EFFICIENCY (%) EFFICIENCY (%) 80 70 60 50 30 0 2 4 6 8 LOAD CURRENT (A) 10 60 50 0.6VOUT 1.2VOUT 1.5VOUT 2.5VOUT 3.3VOUT 40 0.6VOUT 1.2VOUT 1.5VOUT 2.5VOUT 40 70 30 20 12 0 2 dc823bb F02a 4 6 8 LOAD CURRENT (A) 10 12 dc823bb F02b Figure 2. Measured Supply Efficiencies with Different VIN and VOUT IOUT (5A/DIV) COUT = 2 x 100F/X5R/1210 332mVP-P VIN = 12V VOUT = 1.5V FCB = 0 0A TO 10A LOAD STEP VOUT (200mV/DIV) dc823ba F03 Figure 3. Measured Load Transient Response (0A to 10A Step) dc823baf 3 DEMO MANUAL DC823B-A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C1 CAP, 150F 20% 35V ALUM SANYO 35MV150WXV (now SUNCON 35ME150WXV) 2 2 C5, C2 CAP, 1206 10F 20% 25V X5R TDK C3216X5R1E106MT 3 2 C7, C8 CAP, 1812 100F 20% 6.3V X5R TDK C4532X5R0J107M 4 1 C10 CAP, 1206 22F 20% 6.3V X5R TAIYO YUDEN JMK316BJ226ML-T 5 1 C12 CAP, 0603 100pF 10% 50V X7R AVX 06035C101KAT1A 6 1 R1 RES, 0603 49.9k 1% 1/10W AAC CR16-4992FM 7 1 R8 RES, 0603 0 JUMPER VISHAY CRCW06030000Z0EA 8 1 U1 IC, LTM4600EV LINEAR TECHNOLOGY LTM4600EV Additional Demo Board Circuit Components 1 0 C4, C3 CAP, 1206 OPTION TAIYO YUDEN EMK316BJ475ML-T OPTION 2 0 C8 CAP, 1812 OPTION TAIYO YUDEN JMK432BJ107MU-T OPTION 3 0 C11, C14, C18, C19 CAP, 0603 OPTION OPTION 4 1 C13 CAP, 0603 100pF 10% 50V NPO AVX 06035A101KAT 5 2 C15, C16 CAP, 0603 1F 20% 10V X5R TAIYO YUDEN LMK107BJ105MA-T 6 0 C17 CAP, 0805 1F 20% 16V X5R OPTION TAIYO YUDEN EMK212BJ105MG-T 7 1 D1 DIODE, ZENER 4.7V DIODES INC. BZX84C4V7-7-F 8 1 Q14 XSTR, SUD50N03-10CP MOSFET SILICONIX SUD50N03-10CP-E3 9 1 R2 RES, 0603 66.5k 1% 1/10W AAC CR16-6652FM R2 - ALTERNATE RES, 0603 66.5k 1% 1/10W VISHAY CRCW06036652F R3 AAC CR16-3162FM 10 1 RES, 0603 31.6k 1% 1/10W R3 - ALTERNATE RES, 0603 31.6k 1% 1/10W PANASONIC ERJ-3EKF3162V 11 1 R4 RES, 0603 22.1k 1% 1/10W AAC CR16-2212FM 12 1 R5 RES, 0603 13.7k 1% 1/10W AAC CR16-1372FM 13 3 R6, R10, R12 RES, 0603 10k 5% 1/10W VISHAY CRCW060310K0JNEA R6, R10, RES, 0603 10k 5% 1/10W R12- ALTERNATE PANASONIC ERJ-3GEY512V 14 1 R7 RES, 0603 5.1k 5% 1/10W AAC CR16-512JM 15 1 R9 RES, 0603 1M 5% 1/16W AAC CR16-105JM 16 1 R11 RES, 2512 0.01 5% 1W IRC LRF2512-01-R010-J 17 0 R13 RES, 0603 OPTION OPTION 18 1 R14 RES, 0603 100k 1% 1/10W AAC CR16-1003FM 1 6 JP0 TO JP5 HEADER, 2-PIN, 2mm COMM CON 2802S-02G2 2 2 JP6, JP7 HEADER, 3-PIN, 2mm COMM CON 2802S-03G2 3 4 J1, J2, J3, J4 JACK, BANANA KEYSTONE 575-4 4 2 J5, J6 CONN, BNC, 5 PINS CONNEX 112404 5 14 TP1 TO TP14 TURRET MILL-MAX 2501-2-00-80-00-00-07-0 6 3 JP3, JP6, JP7 SHUNT SAMTEC 2SN-BK-G 7 4 STANDOFF, SNAP ON KEYSTONE_8831 Hardware dc823baf 4 R7 5.1K DCM R12 10K VOUT 1.2V 1.5V 1.8V 2.5V 3.3V 5V JP1 JP2 JP3 JP4 JP5 CCM JP0 TP8 PWRGD FCB VIN TP5 TP6 150uF C1 JUMPER SGND (VOS RTN) VOSET FADJ SVIN TP14 COMP TP9 TP11 TP12 + 2 EXTVCC TP2 TP10 D1 4.7V PWRGD FCB COMP VOSET FADJ SVIN EXTVCC VIN- GND J2 1 VIN 100pF 1 C13 FCB JP6 3 2 R6 10K 1 JP0 2 1.2V OPT C3 R14 100K C11 OPT 1 2 OPT C4 1 2 1 2 1 1 1 JP1 2 1.5V VOUT 1 1 JP2 2 1.8V R1 49.9K C19 OPT 1 2 2 JP3 1 2.5V R3 31.6K 2 JP4 1 3.3V VOUT SEL 2 R13 OPT 2 C12 100pF 10uF C5 1 C17 OPT 1 2 10uF C2 R2 66.5K 2 J1 R4 22.1K 2 JP5 1 5V R5 13.7K OPT C18 R8 0 D23 G1 H7 H9 H11 J23 G23 B23 A21 A15 A17 A19 U1 LTM4600EV EXTVCC SGND PGND PGND PGND PGND PGOOD FCB COMP VOSET FADJ SVIN PGND PGND PGND PGND PGND PGND RUN/SS VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT 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. DO NOT SCALE DRAWING THIRD ANGLE PROJECTION UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL PER ASME Y14.5M -1994 Thursday, October 06, 2005 DESIGNER ENGINEER APPROVED CHECKED DRAWN MEI APPROVALS CONTRACT NO. N22 N20 N18 N16 N14 N12 F23 R20 R22 P2 P4 P6 P8 P10 P12 P14 P16 P18 P20 P22 08/04/04 DATE C14 OPT 1uF C16 IOSTEP 1uF C15 PROD J5 VIN OFF ON 100uF C6 R11 0.01 TECHNOLOGY 1 RUN/SS JP7 3 2 R9 1M 1 100uF C7 1 Q14 REVISION HISTORY DESCRIPTION J6 J4 TP4 RUN SCALE: NONE DWG NO SHEET DC823B-A FILENAME: 823B-1.DSN CAGE CODE 1 VO- 1 REV 2 RUN/SS OF TP7 TP3 GND VOUT VO+ VO+ IOSTEP CLK TP13 APPROVED C10 0.6V-5V/10A 22uF 6.3V J3 VOUT 1 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 OPT C8 R10 10K DATE 05/27/05 SCH, LTM4600EV HIGH EFFICIENCY DC/DC MODULE Custom SIZE TITLE 1 2 1 REV 2 1 VIN 2 3 1 1 2 1 2 1 2 3 5V-20V 1 2 B1 D1 F1 A3 A5 A7 A9 A11 A13 C10 C12 C14 E14 E12 E10 VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN 2 1 2 1 2 2 1 2 1 2 1 2 1 5 4 3 2 2 1 VIN+ 2 1 T2 T4 T6 T8 T10 T12 T14 T16 T18 T20 T22 R2 R4 R6 R8 R10 R12 R14 R16 R18 VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND H13 H15 H17 J1 K7 K9 K11 K13 K15 K17 L2 L4 L6 L8 L10 L12 L14 L16 L18 L20 L22 M2 M4 M6 M8 M10 M12 M14 M16 M18 M20 M22 N2 N4 N6 N8 N10 2 1 1 2 2 1 1 2 1 2 1 2 2 3 4 5 TP1 ECO DEMO MANUAL DC823B-A SCHEMATIC DIAGRAM dc823baf 5 DEMO MANUAL DC823B-A 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 (c) 2004, Linear Technology Corporation dc823baf 6 Linear Technology Corporation LT 0111 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2011