DEMO MANUAL DC1084A-B LTM4602HV 28V, 6A Step-Down Module Regulator DESCRIPTION Demonstration circuit DC1084A-B features the LTM(R)4602HV, the high efficiency, high density step-down Module(R) regulator. The input voltage range is from 4.5V to 28V. The output voltage is jumper programmable from 0.6V to 5V, refer to the step-down ratio curve in the LTM4602HV data sheet. The rated load current is 6A, while derating is necessary for certain VIN, VOUT and thermal conditions. PERFORMANCE SUMMARY PARAMETER The LTM4602HV data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC1084A-B. 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) CONDITION Input Voltage Range VALUE 4.5V to 28V Output Voltage VOUT Jumper Selectable (Open for 0.6V) 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V Maximum Continuous Output Current Derating is Necessary for Certain VIN, VOUT and Thermal Conditions 6A DC Default Operating Frequency 800kHz BOARD PHOTO dc1084a-bf 1 DEMO MANUAL DC1084A-B QUICK START PROCEDURE Demonstration circuit DC1084A-B is an easy way to evaluate the performance of the LTM4602HVEV. Please refer to Figure 1 for proper measurement equipment setup and follow the procedure below: 1. Place jumpers in the following positions for a typical 1.5VOUT application: FCB RUN/SS VOUT SEL CCM ON 1.5V 2. With power off, preset the load to 0A and VIN supply to be less than 28V. Connect the input power supply, load, optional 5V bias supply and meters as shown in Figure 1. The optional 5V bias supply must be off anytime the supply to VIN is turned off. 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 ripple should be measured at J6 with a BNC cable. 5. For optional load transient test, apply 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 on the transient load circuit. The output transient current can be monitored at BNC connector J5 (10mV/A). 3. Turn on the power at the input. The output voltage should be 1.5V 2%. Figure 1. Test Setup of DC1084A-B (EXTVCC Bias Supply is Optional) dc1084a-bf 2 DEMO MANUAL DC1084A-B QUICK START PROCEDURE Figure 2. Measured Supply Efficiency with Different VIN and VOUT VIN = 12V, VOUT = 1.5V 0A to 5A LOAD STEP FCB = 0V COUT = 1 x 22F CERAMIC (1206), 1 x 100F CERAMIC (1812), C3 = 100pF Figure 3. Measured Load Transient Response (0A-5A Step) dc1084a-bf 3 DEMO MANUAL DC1084A-B 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 35MV150WXV) 2 2 C5, C2 CAP, 1206 10F 20% 35V X5R TAIYO YUDEN GMK316 BJ106ML-T 3 1 C10 CAP, 1206 22F 20% 6.3V X5R AVX 12066D266MAT2A 4 1 C7 CAP, 1812 100F 20% 6.3V X5R TDK C4532X5R0J107MZ 5 1 C12 CAP, 0603 100pF 10% 50V X7R AVX 06035C101KAT1A 6 1 R2 RES, 0603 66.5k 1% 1/10W AAC CR16-6652FM 7 1 R8 RES, 0603 0 JUMPER ACC CJ06-000M 8 1 U1 IC, LTM4602HVEV LINEAR TECH. LTM4602HVEV Additional Demo Board Circuit Components 1 0 C4, C3 CAP, 1206 OPTION TAIYO YUDEN EMK316BJ475ML-T OPTION 2 0 C8 CAP, 1812 100F 20% 6.3V X5R OPTION TDK C4532X5R0J107MZ OPTION 3 0 C6 CAP, 1812 OPTION TAIYO YUDEN JMK432BJ107MU-T OPTION 4 0 C11, C14, C18, C19 CAP, 0603 OPTION OPTION 5 1 C13 CAP, 0603 100pF 10% 50V NPO AVX 06035A101KAT 6 2 C15,C16 CAP, 0603 1F 20% 10V X5R TAIYO YUDEN LMK107BJ105MA-T 7 0 C17 CAP, 0805 1F 20% 16V X5R OPTION TAIYO YUDEN EMK212BJ105MG-T OPTION 8 1 D1 DIODE, ZENER 4.7V DIODES INC. BZX84C4V7 9 1 Q14 XSTR, SUD50N03-10CP MOSFET SILICONIX SUD50N03-10CP 10 1 R1 RES, 0603 49.9k 1% 1/10W AAC CR16-4992FM 11 1 R3 RES, 0603 31.6k 1% 1/10W AAC CR16-3162FM 12 1 R4 RES, 0603 22.1k 1% 1/10W AAC CR16-2212FM 13 1 R5 RES, 0603 13.7k 1% 1/10W AAC CR16-1372FM 14 3 R6, R10, R12 RES, 0603 10k 5% 1/10W VISHAY CRCE060310K0JNEA 15 1 R7 RES, 0603 5.1k 5% 1/10W AAC CR16-512JM 16 1 R9 RES, 0603 1M 5% 1/16W AAC CR16-105JM 17 1 R11 RES, 2512 0.01 5% 1W IRC LRF2512-01-R010-J 18 0 R13 RES, 0603 OPTION OPTION 19 1 R14 RES, 0603 100k 1% 1/10W AAC CR16-1003FM dc1084a-bf 4 DEMO MANUAL DC1084A-B SCHEMATIC DIAGRAM dc1084a-bf 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. 5 DEMO MANUAL DC1084A-B 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 dc1084a-bf 6 Linear Technology Corporation LT 0911 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com (c) LINEAR TECHNOLOGY CORPORATION 2011