DEMO MANUAL DC2367A LTM4632EV Ultrathin µModule Regulator for DDR-QDR4 Memory VDDQ, VTT and VREF DESCRIPTION Demonstration circuit DC2367A features the LTM®4632EV µModule® regulator, a tiny low-profile high-performance high efficiency dual step-down regulator for DDR power. LTM4632 has an operating input voltage range of 3.6V to 15V. The output voltage of channel 1 (VDDQ) is resistor programmable from 0.6V to 2.5V and is capable of delivering up to 3A of output current. The output voltage of channel 2 (VTT) is set to regulate ½ of the voltage on the VDDQIN pin which can provided by either the channel 1 output or an external reference voltage. It can source or sink up to 3A of output current. A 10mA buffered output of VDDQIN/2 is also provided for supplying VREF voltage for DDR memory. DC2367A also provides the option for paralleling channels 1 and 2 together for up to 6A capable VTT rail. LTM4632 is a complete DC/DC DDR dual point of load regulator in a low-profile thermally enhanced 6.25mm × 6.25mm × 1.82mm LGA package requiring only a few input and output capacitors. Output voltage tracking is available through the TRACK/SS pin for supply rail sequencing. External clock synchronization is available through the SYNC/MODE pin. For high efficiency at low load currents the MODE pin jumper (JP4) selects the Burst Mode® option for operation in less noise sensitive applications. The LTM4632 data sheet must be read in conjunction with this demo manual for working on or modifying demo circuit 2367A. Design files for this circuit board are available at http://www.linear.com/demo/DC2367A L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. BOARD PHOTO dc2367af 1 DEMO MANUAL DC2367A PERFORMANCE SUMMARY PARAMETER Specifications are at TA = 25°C CONDITIONS MIN Input Voltage Range TYP 3.6 MAX 15 UNITS V Output Voltage VOUT1 (VDDQ) Resistor Programmable, Jumper Selectable 1.5 (±1.5%) 1.8 (±1.5%) 2.5 (±1.5%) V V V Maximum Continuous Output Current IOUT1 Derating Is Necessary for Certain Operating Conditions. See Data Sheet for Details 3 A Output Voltage VOUT2 (VTT) VOUT1 = 1.5V VOUT1 = 1.8V VOUT1 = 2.5V 0.75 0.9 1.25 V V V Maximum Continuous Output Current IOUT2 Derating Is Necessary for Certain Operating Conditions. See Data Sheet for Details ±3 A 1 MHz Default Operating Frequency VIN = 12V, VOUT1 = 2.5V, IOUT = 3A, fSW = 1MHz Efficiency VIN = 12V, VOUT2 = 1.25V, IOUT = 3A, fSW = 1MHz 83.9 (See Figure 2) 72.3 (See Figure 3) % % QUICK START PROCEDURE Demonstration circuit DC2367A is an easy way to evaluate the performance of the LTM4632. Please refer to Figure 1 for test setup connections and follow the procedure below. 1. With power off, place the jumpers in the following positions for a typical application for 2.5VOUT1 and 1.25VOUT2 rails: JP1 JP2 JP3 JP4 JP6 RUN1 RUN2 TRACK/SS MODE VDDQ SEL ON ON SS CCM 2.5V 2. Before powering up the input supply and loads, preset the input voltage supply to be between 3.6V to 15V. Preset the load current for each output rail to 0A. 3. With power off, connect the loads, input voltage supply and meters as shown in Figure 1. 4. Turn on the input power supply. The output voltage meters for each output rail should display the programmed output voltage ±1.5%. 5. Once the proper output voltages are established, adjust the load current on each rail within the 0A to 3A range and observe each output rail’s load regulation, efficiency, and other parameters. 6. To observe increased light load efficiency place the mode pin jumper (JP4) in the BURST MODE position. dc2367af 2 DEMO MANUAL DC2367A QUICK START PROCEDURE VIN + – + – VARIALE RESISTOR (OPTIONAL) FOR SINK CURRENT TEST + + LOAD 0A TO 3A – + + LOAD 0A TO 3A – – + – – – + + – + – Figure 1. Test Setup 80 RUN2 = OFF 85 75 80 70 EFFICIENCY (%) EFFICIENCY (%) 90 75 70 VDDQ = 2.5V VDDQ = 1.8V VDDQ = 1.5V 65 60 0 0.5 1.0 2.0 1.5 OUTPUT CURRENT (A) 2.5 3.0 dc2367a F02 Figure 2. VDDQ 12VIN Efficiency 65 RUN1 = OFF VDDQIN, SUPPLIED EXTERNALLY VTT = 1.25V VTT = 0.9V VTT = 0.75V 60 55 50 0 0.5 1.5 1.0 2.0 OUTPUT CURRENT (A) 2.5 3.0 dc2367a F03 Figure 3. VTT 12VIN Efficiency dc2367af 3 DEMO MANUAL DC2367A QUICK START PROCEDURE VOUT1 = 50mV/DIV IOUT1_STEP = 2A/DIV VIN = 12V VOUT1 = 2.5V COUT1 = 100µF ×2, 10µF ×1 dc2367a F04 Figure 4. VDDQ Load Transient Response (0A to 1.5A Load Step) VOUT2 = 50mV/DIV IOUT1_STEP = 2A/DIV VIN = 12V VOUT2 = 1.25V COUT2 = 100µF ×3, 10µF ×1 dc2367a F05 Figure 5. VTT Load Transient Response (0A to 1.5A Load Step) dc2367af 4 DEMO MANUAL DC2367A QUICK START PROCEDURE VIN = 12V VOUT1 = 2.5V IOUT1 = 3A VOUT2 = 1.25V IOUT2 = 3A fSW = 1MHz TA = 25°C, NO FORCED AIRFLOW dc2367a F06 Figure 6. 12VIN Full Load Thermal Capture dc2367af 5 DEMO MANUAL DC2367A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 2 CIN1, CIN2 CAP., 4.7µF, X5R, 16V, 10%, 0603 TDK - C1608X5R1C475K080AC 2 2 COUT7, COUT9 CAP., 10µF, X5R, 6.3V, 10%, 0805 MURATA, GRM219R60J106KE19D 3 5 COUT1, COUT2, COUT3, COUT4, COUT6 CAP., 100µF, X5R, 6.3V, 20%, 1206 MURATA, GRM31CR60J107ME39L 4 1 R4 RES., 19.1k, 1/10W, 1%, 0603 VISHAY, CRCW060319K1FKEA 5 1 U1 I.C., LTM4632EV, LGA 25-6.25X6.25 LINEAR TECH., LTM4632EV#PBF OPT Additional Demo Board Circuit Components 1 0 CIN4, COUT5, COUT8 CAP., OPTION, 1206 2 1 CIN5 CAP., 47µF, X5R, 16V, 20%, 1206 TDK, C3216X5R1C476M160AB 3 1 CIN3 CAP., 2.2µF, X7R, 25V, 10%, 0805 TAIYO YUDEN, TMK212B7225KGHT 4 1 CIN6 CAP., POSCAP, 22µF, X5R, 25V, 20%, 7343 PANASONIC, 25TQC22MV 5 4 CVCC1, C4, C18, CVCC CAP., 1µF, X5R, 10V, 10%, 0603 MURATA, GRM188R61A105KA61D 6 0 CDDQIN CAP., OPTION, 0805 OPT 7 1 CTR1 CAP., 4700pF, X7R, 50V, 10%, 0603 KEMET, C0603C472K5RACTU 8 1 CTTR CAP., 0.01µF, X7R, 50V, 10%, 0603 KEMET, C0603C103K5RACTU 9 1 CFFW1 CAP., 10pF, C0G, 50V, 5%, 0603 MURATA, GRM1885C1H100JA01D 10 0 CC1, CC2, CTTR1 CAP., OPTION, 0603 OPT 11 0 RFB1, RTR2, R7, R26, RD1, RDDQIN RES, OPTION, 0603 OPT 12 1 R5 RES., 30.1k, 1/10W, 1%, 0603 VISHAY, CRCW060330K1FKEA 13 1 R6 RES., 40.2k, 1/10W, 1%, 0603 VISHAY, CRCW060340K2FKEA 14 1 R3 RES., 10k, 1/10W, 1%, 0603 VISHAY, CRCW060310K0FKEA 15 2 RPG1, RPG2 RES., 100k, 1/10W, 1%, 0603 VISHAY, CRCW0603100KFKEA 16 1 R8 RES., 1k, 1/10W, 1%, 0603 VISHAY, CRCW06031K00FKEA 17 2 R1, R2 RES., 1M, 1/10W, 1%, 0603 VISHAY, CRCW06031M00FKEA 18 2 RTR1, RVDDQ RES., 0Ω, 1/10W, 0603 VISHAY, CRCW06030000Z0EA 19 1 RS1 RES., 0.05Ω, 1/4W, 1%, 1206 VISHAY, WSL1206R0500FEA 20 0 R29 RES, OPTION, 2512 OPT 21 1 Q1 XSTR., MOSFET, N-CH, 40V, 14A, TO-252 VISHAY, SUD50N04-8M8P-4GE3 Hardware: For Demo Board Only 1 14 E1-E14 TESTPOINT, TURRET, 0.094" MTG. HOLE MILL-MAX, 2501-2-00-80-00-00-07-0 2 3 JP1, JP2, JP3 CONN., HEADER, 1X3, 2mm SULLINS, NRPN031PAEN-RC 3 1 JP4 CONN., HEADER, 2X3, 2mm SULLINS, NRPN032PAEN-RC 4 1 JP6 CONN., HEADER, 2X4, 2mm SULLINS, NRPN042PAEN-RC 5 5 XJP1, XJP2, XJP3, XJP4, XJP6 SHUNT, 2mm SAMTEC 2SN-BK-G 6 2 J1, J2 CONN, BNC, 5PINS CONNEX, 112404 7 4 STAND OFF STAND OFF, NYLON, SNAP-ON, 0.375" KEYSTONE_8832 dc2367af 6 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. A B C D E10 E9 E6 E12 E1 E3 J1 RTR2 OPT Q1 1 R3 10K FCM SYNC BURST MODE JP2 3 2 1 5 3 1 JP4 MODE 1 RS1 0.050 1% 1206 SS TRACK 3 C4 1uF 10V VDDQ JP3 2 1 TRACKSS 1. ALL RESISTORS AND CAPACITORS ARE 0603 5 1M R2 CIN5 47uF 16V 1206 CIN3 2.2uF 25V 0805 6 4 2 C18 1uF 10V 1 J2 R1 1M COMP2 COMP1 CC1 OPT E5 E3 C5 C3 B2 D2 INTVCC CC2 OPT COMP1 TRACKSS1 MODE/SYNC INTVCC RUN2 RUN1 RPG1 100K 4 VIN A2 [1] CIN6, IS AN OPTIONAL CAPACITOR. IT IS INSERTED TO DAMPEN THE (POSSIBLE) RINGING VOLTAGE DUE TO LONG INPUT LEADS. ON A NORMAL, TYPICAL PCB, WITH SHORT TRACES, THE CAPACITOR IS NOT NEEDED. VDDQ 3 2 CVCC 1uF RUN1 JP1 VIN 1 CIN1 4.7uF 16V 0603 4 CIN2 4.7uF 16V 0603 CVCC1 1uF OFF ON CTR1 4700pF INTVCC (FORCED CONTINUOUS MODE) OFF ON VIN CIN4 47uF OPT 16V 1206 RUN2 SUD50N04-8M8P 0 RTR1 R8 1k 1% + CIN6 22uF 25V 7343 [1] NOTE: UNLESS OTHERWISE SPECIFIED IOSTEP IOSTEP CLK TRACK1 GND CLK PGOOD1 GND 3.6V - 15V E2 5 4 3 2 3 2 D3 E2 B3 LTM4632EV B1 A1 E4 E1 D1 A4 VFB1 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE 2 SCALE = NONE APPROVALS OPT CFFW1 10pF ECO 2 REV R5 30.1k 1% 1.8V USER SEL R7 OPT COUT4 100uF 6.3V 1206 1.5V R6 40.2k 1% COUT2 100uF 6.3V 1206 VDDQ SEL COUT1 100uF 6.3V 1206 OPT RDDQIN COUT6 100uF 6.3V 1206 COUT3 100uF 6.3V 1206 COUT8 OPT 6.3V 1206 OPT R26 OPT 2512 R29 DATE: N/A SIZE TECHNOLOGY COMP2 VTT E13 10mA VTTR VTT +/- 3A GND GND VDDQ 3A VDDQIN LTM4632EV 1 SHEET 1 DEMO CIRCUIT 2367A Thursday, September 03, 2015 IC NO. 2 OF 1 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only CTTR1 OPT 0603 E5 E7 E14 E4 E11 PGOOD2 SY APPROVED 15V DUAL 3A DDR µMODULE REGULATOR TITLE: SCHEMATIC COMP1 VDDQ VDDQ COUT7 10uF 6.3V 0805 COUT9 10uF 6.3V 0805 VTT COUT5 OPT 6.3V 1206 CDDQIN OPT 0805 E8 DATE 9/03/15 1 PRODUCTION REVISION HISTORY DESCRIPTION OPTIONAL JUMPERS FOR PARALLEL OPERATION 2.5V R4 19.1k 1% JP6 INTVCC RFB1 OPT RD1 2 RVDDQ 0 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. LT VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. SY CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. FOR POLY-PHASE OPERATION: JP6 = OPEN VFB1 RD1, R29, R26, RDDQIN = 0 RVDDQ = OPT CTTR 10nF VOUT2 VOUT2 FB1 VOUT1 VOUT1 VDDQIN RPG2 100K INTVCC 3 B4 PGOOD2 VIN1 2 3 4 5 D4 PGOOD1 COMP2 A5 VIN GND C1 2 1 VIN GND C2 4 3 VIN GND B5 GND C4 6 5 VIN GND D5 VTTR A3 8 7 5 A B C D DEMO MANUAL DC2367A SCHEMATIC DIAGRAM dc2367af 7 DEMO MANUAL DC2367A 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 dc2367af 8 Linear Technology Corporation LT 0116 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2016