DEMO MANUAL DC1295B LTM4606 EN55022B Compliant 28VIN, 6A Step-Down Module Regulator DESCRIPTION Demonstration circuit DC1295B features the LTM(R)4606EV, an EN55022 Class B certified, switch mode step-down power module. The input voltage range is from 4.5V to 28V with a jumper programmable output voltage from 0.6V to 5V. The rated load current is 6A, while derating is necessary for certain VIN, VOUT, and thermal conditions. The LTM4606 allows the user to program output ramp-up and ramp-down through the TRACK/SS pin. The output can be set to coincidentally or ratiometrically track to another PERFORMANCE SUMMARY PARAMETER voltage rail. Output voltage margining can also be realized through jumper position selections. The LTM4606 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC1295B. 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 5V to 28V Output Voltage VOUT Jumper Selectable (Open for 0.6V) 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V; 2% Maximum Continuous Output Current Derating Is Necessary for Certain VIN, VOUT, and Thermal Conditions 6ADC Default Operating Frequency Efficiency 800kHz VIN = 12V, VOUT = 3.3V, IOUT = 6A 89.6%, See Figure 4 BOARD PHOTO dc1295bf 1 DEMO MANUAL DC1295B QUICK START PROCEDURE Demonstration circuit DC1295B is an easy way to evaluate the performance of the LTM4606EV. Please refer to Figure1 for proper measurement equipment setup and follow the procedure below: 1. Place jumpers in the following positions for a typical 1.5VOUT application: FCB MARG1 MARG0 RUN VOUT SELECT CCM LO LO ON 1.5V 2. With power off, connect the input power supply, load and meters as shown in Figure 1. Preset the load to 0A and VIN supply to be 12V. 3. Turn on the power at the input. The output voltage should be 1.5V 2% (1.47V ~ 1.53V). 5. The very low ripple of the LTM4606 requires proper measurement technique. Input ripple can be measured with a typical scope probe, but you should not use the ground clip lead. See Figure 2 for an illustration of how to connect to the input capacitor. The output ripple should be measured with a 50 BNC cable connected to J6. 6. For the 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 (<5%) to limit the thermal stress on the transient load circuit. The output transient current can be monitored at BNC connector J5 (10mV/A), the output voltage can be monitored at BNC connector J6. 4. Once the proper output voltage is established, adjust the load within the operating range and observe the output voltage regulation, efficiency and other parameters. dc1295bf 2 DEMO MANUAL DC1295B QUICK START PROCEDURE + V - Load A - VIN - A + - + V + Figure 1. Test Setup of DC1295B Input Capacitor Figure 2. Scope Probe Placements for Measuring Input Ripple dc1295bf 3 DEMO MANUAL DC1295B QUICK START PROCEDURE dc1295b F03a VIN = 5V, VOUT = 1.2V, IOUT = 5A OUTPUT CAPACITANCE: 100F + 22F CERAMIC CAPACITORS dc1295b F03b VIN = 5V, VOUT = 1.2V, IOUT = 5A OUTPUT CAPACITANCE: 100F + 22F CERAMIC CAPACITORS A 1F CERAMIC CAPACITOR ADDED CLOSE TO COUT1 Figure 3. Output Ripple (300MHz BW) dc1295bf 4 DEMO MANUAL DC1295B QUICK START PROCEDURE Efficiency vs Load Current at 12V VIN (DCM) 100 95 EFFICIENCY (%) 90 85 80 75 70 1.2VOUT 1.5VOUT 1.8VOUT 2.5VOUT 3.3VOUT 5VOUT 65 60 55 50 0 1 2 4 3 LOAD CURRENT (A) 5 6 dc1295b F04 Figure 4. Measured Efficiency at 12V VIN with Different VOUT VOUT(AC) 100mV/DIV IOUT STEP 5A/DIV dc1295b F05 VIN = 12V, VOUT = 1.5V, 0A TO 5A LOAD STEP (CCM) COUT = 100F/6.3V/X5R + 22F/10V/X5R CERAMIC CAPACITORS Figure 5. Measured Load Transient Response dc1295bf 5 DEMO MANUAL DC1295B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 CIN1 CAP, 150F 20% 35V ALUM SANYO 35ME150WXV (now SUNCON 35ME150WXV) 2 3 CIN2, CIN3, C8 CAP, 1206 10F 20% 35V X5R TAIYO YUDEN GMK316BJ106ML-T 3 1 COUT1 CAP, 1812 100F 20% 6.3V X5R TDK C4532X5R0J107M 4 1 COUT4 CAP, 1210 22F 20% 10V X5R TAIYO YUDEN JMK325BJ226MM-T 5 1 CSS CAP, 0603 0.1F 20% 16V X7R AVX 0603YC104MAT2A 6 1 C5 CAP, 0603 47pF 10% 50V NPO AVX 06035A470KAT2A 7 1 D1 DIODE, ZENER 4.7V DIODES INC. BZX84C4V7 8 1 R17 RES, 0603 10k 5% 1/10W VISHAY CRCE060310K0JNEA 9 1 R4 RES, 0603 392k 1% 1/10W VISHAY CRCW0603392KFKEA 10 1 R14 RES. 0603 100k 5% 1/10W VISHAY CRCW0603100KJNEA 11 1 R15 RES, 0603 60.4k 1% 1/10W VISHAY CRCW060360K4FKEA 12 1 U1 IC, POWER MODULE LINEAR TECH. LTM4606EV Additional Demo Board Circuit Components 1 2 CIN4, CIN5 CAP, 1206 OPTION OPTION 2 0 COUT2 CAP, 1812 OPTION OPTION 3 0 COUT3 CAP, 1210 OPTION OPTION 4 2 C1, C2 CAP, 0603 1F 10% 10V X5R TAIYO YUDEN LMK107BJ105KA 5 0 C3, C4, C6, C7 CAP, 0603 OPTION OPTION 6 1 Q1 XSTR, SUD50N03-10CP MOSFET SILICONIX SUD50N03-10CP 7 1 R1 RES, 0603 10k 5% 1/10W VISHAY CRCE060310K0JNEA 8 1 R2 RES, 2512 0.010 1% 1W VISHAY WSL2512R0100FEA 9 1 R3 RES. 0603 51k 5% 1/10W VISHAY CRCW060351K0JNEA 10 0 R6, R11, R12, R18, R26 RES, 0603 OPTION OPTION 11 2 R23, R10 RES, 0603 0 JUMPER VISHAY CRCW06030000Z0EA 12 1 R16 RES, 0603 40.2k 1% 1/10W VISHAY CRCW060340K2FKEA 13 1 R19 RES, 0603 30.1k 1% 1/10W VISHAY CRCW060330K1FKEA 14 1 R20 RES, 0603 19.1k 1% 1/10W VISHAY CRCW060319K1FKEA 15 1 R21 RES, 0603 13.3k 1% 1/10W VISHAY CRCW060313K3FKEA 16 1 R22 RES, 0603 8.25k 1% 1/10W VISHAY CRCW06038K25FKEA TURRET MILL MAX 2308-2-00-80-00-00-07-0 Hardware/Components (For Demo Board Only) 1 12 E1-E4, E6-E9, E11-E14 2 6 JP1, JP2, JP3, JP4, JP5, JP6 HEADER, 2-PIN, 2mm SAMTEC TMM 102-02-L-S 3 4 JP7, JP8, JP9, JP10 HEADER, 3-PIN, 2mm SAMTEC TMM-103-02-L-S 4 4 J1, J2, J3, J4 JACK, BANANA KEYSTONE 575-4 5 2 J5, J6 CONN, BNC, 5 PINS CONNEX 112404 6 5 JP2, JP7-JP10 SHUNT, 2mm SAMTEC 2SN-BK-G 7 4 STANDOFF, NYLON KEYSTONE 8834 dc1295bf 6 A B C D E4 E2 J2 J1 E1 JP7 SGND COMP E6 E13 5V + VIN 5V 5V 5 VIN FSET JP8 E12 DRVCC LO HI MARG1 LO HI MARG0 PGOOD VIN - GND 5V - 28V VIN VIN + 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. 4.7V D1 10K R17 (Opt) R11 (Opt) R26 CIN1 150uF 35V (Opt) C7 C4 (Opt) C3 CIN2 10uF 35V FCB JP10 & (Opt) 8.25K 1% R22 JP6 5V R21 13.3K 1% 3.3V 19.1K 1% JP5 2.5V JP4 1.8V R19 JP3 30.1K 1% R20 40.2K 1% 1.5V R16 60.4K 1% 1.2V JP2 R15 R4 5V R3 51K 4 C8 10uF 35V 5V 392K 1% CIN5 (Opt) VOUT SELECT JP1 47pF C5 (Opt) R6 CCM DCM CIN4 (Opt) VOUT R23 0 (Opt) CIN3 10uF 35V VIN 4 ' + % & 0 ) $ ' % & ( ( & ' & $ $ % * $ $ $ $ $ $ % % % % % % & & & & & & 6*1' 6*1' 9' 9' )&% 9)% &203 &203 )6(7 '59&& '59&& '59&& 0$5* 0$5* 0$5* ,179&& 03*0 03*0 3*22' 3 U1 LTM4606EV 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 9,1 - - - - - - - - - - - . . . . . . . . . . . 3//,1 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 581 581 75$&.66 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 9287 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3*1' 3 7+,6&,5&8,7,635235,(7$5<72/,1($57(&+12/2*<$1' 6833/,(')2586(:,7+/,1($57(&+12/2*<3$576 $33529$/6 (1* 2 6$0< 3&%'(6 0, &2175$&712 0.010 1% J5 IOSTEP VIN (Opt) COUT3 0 JP9 RUN TRACK/SS GND PLLIN VO- GND 0.6V - 5V / 6A VOUT VO+ VOUT ,267(3B&/. OFF ON E11 E14 E9 E8 J3 J4 E7 J6 R1 10K E3 SAM Y. APPROVED '$7( 1 6+((7 LTM4606EV DEMO CIRCUIT 1295B 7KXUVGD\2FWREHU ,&12 2) 1 5(9 R 0F&DUWK\%OYG 0LOSLWDV&$ 3KRQH )D[ /7&&RQILGHQWLDO)RU&XVWRPHU8VH2QO\ R18 (Opt) 100K R14 R12 (Opt) R10 C10 1uF COUT4 22uF 10V C9 1uF TECHNOLOGY 0.1uF CSS (Opt) COUT2 VOUT DATE 07/14/10 HIGH DENSITY LOW EMI POWER T MODULE N/A 6,=( R2 SUD50N03-10 Q1 CHANGED A/W PER ATTACHED SHEETS 7,7/( 6&+(0$7,& COUT1 100uF 6.3V 1 REMOVED AND ADDED PARTS, LAYOUT CHANGES DESCRIPTION REVISION HISTORY DYNAMIC LOAD CIRCUIT C2 1uF 10V 1 1 C1 1uF 10V REV ECO &86720(5127,&( $ % $ $ / / / / / / / / / / / 0 0 0 0 0 0 0 0 0 0 0 2 /,1($57(&+12/2*<+$60$'($%(67())25772'(6,*1$ &,5&8,77+$70((76&86720(56833/,('63(&,),&$7,216 +2:(9(5,75(0$,167+(&86720(5 65(63216,%,/,7<72 9(5,)<3523(5$1'5(/,$%/(23(5$7,21,17+($&78$/ $33/,&$7,21&20321(1768%67,787,21$1'35,17(' &,5&8,7%2$5'/$<2870$<6,*1,),&$17/<$))(&7&,5&8,7 3(5)250$1&(255(/,$%,/,7<&217$&7/,1($5 7(&+12/2*<$33/,&$7,216(1*,1((5,1*)25$66,67$1&( ' ' ' ' ' ' ( ( ( ( ( ( ( ( ) ) ) ) ) ) ) ) ) * * * * * * * * * * * + + + + + + + + + + + 5 A B C D DEMO MANUAL DC1295B SCHEMATIC DIAGRAM dc1295bf 7 DEMO MANUAL DC1295B 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 dc1295bf 8 Linear Technology Corporation LT 0711 * 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