DEMO MANUAL DC2269A-A LTM4676EY Dual Step-Down µModule Regulator with PMBus Power System Management Description Demonstration circuit 2269A-A is a dual-output, high efficiency, high density, µModule® supply on a small 1.5"×1.2" PCB board with 4.5V to 26.5V input range. Each output can supply 13A maximum load current. The demo board has a LTM®4676 µModule regulator, which is a dual 13A or single 26A step-down regulator with PMBus power system management. The DC2269A can be easily inserted to an edge connector for testing and debugging. It has an optional input filter inductor (L1) to further reduce input ripple EMI noise. LTC’s I2C/SMBus/PMBus dongle DC2086A together with DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on the fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status. DC2269A-A powers up to default settings and produce power based on configuration resistors without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensive power system management features of the part, download the GUI software LTpowerPlay™ onto your PC and use For more details and instructions of LTpowerPlay, please refer to LTpowerPlay GUI for LTM4676 Quick Start Guide. Performance Summary PARAMETER GUI Download The software can be downloaded from: http://www.linear.com/ltpowerplay Design files for this circuit board are available at http://www.linear.com/demo/DC2269A-A L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks and LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications are at TA = 25°C CONDITIONS Input Voltage Range VALUE 4.5V to 26.5V Output Voltage, VOUT0 VIN = 4.5V to 26.5V, IOUT0 = 0A to 13A Maximum Output Current, IOUT0 VIN = 4.5V to 26.5V, VOUT = 0.5V to 4V 13A Output Voltage, VOUT1 VIN = 4.5V to 26.5V, IOUT1 = 0A to 13A 0.5V to 5.4V, Default: 1.8V Maximum Output Current, IOUT1 VIN = 4.5V to 26.5V, VOUT = 0.5V to 5.4V Typical Efficiency VIN = 12V, VOUT = 1.8V, IOUT = 13A Default Switching Frequency 0.5V to 4V, Default: 1V 13A 86.3% 500kHz Figure 1. Dual-Output LTM4676/DC2269A-A Demo Circuit dc2269aaf 1 DEMO MANUAL DC2269A-A Quick Start Procedure Table 1. LTM4676 Demo Cards for Up to 100A Point-of-Load Regulation MAXIMUM OUTPUT CURRENT NUMBER OF OUTPUT VOLTAGES NUMBER OF LTM4676 µMODULE REGULATORS ON THE BOARD DEMO BOARD NUMBER 13A, 13A 2 1 DC1811A 13A, 13A 2 1 DC2269A-A 26A 1 1 DC2087A 50A 1 2 DC1989A-A 75A 1 3 DC1989A-B 100A 1 4 DC1989A-C 100A 1 1 + (3× LTM4620A) DC2106A-A 130A 1 1 + (3× LTM4630) DC2106A-B DC2269A-A is easy to set up to evaluate the performance of the LTM4676EY. It can be easily inserted to an edge connector (SAMTEC MEC2-20-01-L-DV--TR) for testing and debugging. Refer to Figure 2 for the proper measurement equipment setup and follow the procedure below. 1.With power off, connect the input power supply to VIN (4.5V-26.5V) and GND (input return). 2.Connect the 1.0V output load between VOUT and GND (Initial load: no load). 3.Connect the 1.8V output load between VOUT and GND (Initial load: no load). 4.Connect the DVMs to the input and outputs. 5.Turn on the input power supply and check for the proper output voltages. VOUT0 should be 1.0V ±1%, and VOUT1 should be 1.8 ±1%. Note: When measuring the output or input voltage ripple, do not use the long ground lead on the oscilloscope probe. See Figure 3 for the proper scope probe technique. Short, stiff leads need to be soldered to the (+) and (–) terminals of an output capacitor. The probe’s ground ring needs to touch the (–) lead and the probe tip needs to touch the (+) lead. Connecting a PC to DC2269A-A You can use a PC to reconfigure the power management features of the LTM4676 such as: nominal VOUT, margin set points, OV/UV limits, temperature fault limits, sequencing parameters, the fault log, fault responses, GPIOs and other functionality. The DC2086A dongle may be plugged when VIN is present. 6.Once the proper output voltages are established, adjust the loads within the operating range and observe the output voltage regulation, ripple voltage and other parameters. 7.Connect the dongle and control the output volt-ages from the GUI. See “LTpowerPlay GUI for the LTM4676 Quick Start Guide” for details. 2 dc2269aaf DEMO MANUAL DC2269A-A Quick Start Procedure – VIN 4.5V to 26.5V ++ + – Load0 (0~13A) – – + + – VOUT0 Load1 (0~13A) – – + + VOUT1 DC2269A-A F02 Figure 2. Proper Measurement Equipment Setup + VOUT – COUT GND Figure 3. Measuring Output Voltage Ripple dc2269aaf 3 DEMO MANUAL DC2269A-A Quick Start Procedure Input Power Supply USB Cable VIN USB to I2C/PMBus Dongle DC1613A+DC2086A 4-‐PIN (J1) Connector Vout0 LTM4676 Demo Board DC2269A-‐A Load0 Load1 Vout1 100 95 95 90 90 85 85 80 75 70 65 VIN = 5V fSW = 500kHz CCM VOUT = 1V VOUT = 1.2V VOUT = 1.5V VOUT = 1.8V VOUT = 2.5V VOUT = 3.3V 0 1 2 3 4 5 6 7 8 9 10 11 12 13 LOAD CURRENT (A) DC2269A-A F05 Figure 5. Efficiency vs Load Current at VIN = 5V 4 EFFICIENCY (%) EFFICIENCY (%) Figure 4. Demo Setup with PC 80 75 70 65 60 VIN = 12V fSW = 500kHz CCM VOUT = 1V VOUT = 1.2V VOUT = 1.5V VOUT = 1.8V VOUT = 2.5V VOUT = 3.3V VOUT = 5V 0 1 2 3 4 5 6 7 8 9 10 11 12 13 LOAD CURRENT (A) DC2269A-A F06 Figure 6. Efficiency vs Load Current at VIN = 12V dc2269aaf DEMO MANUAL DC2269A-A Quick Start Procedure VOUT0 20MHz BW 50mV/DIV VOUT1 20MHz BW 50mV/DIV 6.5A to 9.75A LOAD STEP 6.5A to 9.75A LOAD STEP 100µs/DIV DC2269A-A F07 100µs/DIV Figure 7. Output Voltage VOUT0 vs Load Current (VOUT0 RANGE = 1) VOUT0 20MHz BW 10mV/DIV DC2269A-A F08 Figure 8. Output Voltage VOUT1 vs Load Current (VOUT1 RANGE = 1) VOUT0 20MHz BW 10mV/DIV 2µs/DIV DC2269A-A F09 Figure 9. Output Voltage Ripple at VIN = 12V, VOUT0 = 1V, IOUT0 = 13A 2µs/DIV DC2269A-A F10 Figure 10. Output Voltage Ripple at VIN = 12V, VOUT0 = 1.8V, IOUT0 = 13A Figure 11. Thermal Performance at VIN = 12V, VOUT0 = 1V/11A, VOUT1 = 1.8V/11A, fSW = 500kHz, TA = 23°C, 200LFM Airflow dc2269aaf 5 DEMO MANUAL DC2269A-A LTpowerPlay Software GUI LTpowerPlay is a powerful Windows based development environment that supports Linear Technology power system management ICs, including the LTM4675, LTM4676, LTC3880, LTC3882, LTC3883, LTC2974 and LTC2978. The software supports a variety of different tasks. You can use LTpowerPlay to evaluate Linear Technology ICs by connecting to a demo board system. LTpowerPlay can also be used in an offline mode (with no hardware present) in order to build a multichip configuration file that can be saved and reloaded at a later time. LTpowerPlay provides unprecedented diagnostic and debug features. It becomes a valuable diagnostic tool during board bring-up to program or tweak the power management scheme in a system, or to diagnose power issues when bringing up rails. LTpowerPlay utilizes the DC1613A and DC2086A USBto-SMBus controller to communicate with one of many potential targets, including the LTM4676, the LTC3880, LTC3882 and the LTC3883’s demo system, or a customer board. The software also provides an automatic update feature to keep the software current with the latest set of device drivers and documentation. The LTpowerPlay software can be downloaded from: http://linear.com/ltpowerplay To access technical support documents for LTC Digital Power Products visit Help. View online help on the LTpowerPlay menu. Figure 12. LTpowerPlay Main Interface 6 dc2269aaf DEMO MANUAL DC2269A-A LTpowerPlay Quick Start Procedure The following procedure describes how to use LTpowerPlay to monitor and change the settings of LTM4676. 1.Download and install the LTPowerPlay GUI: d.If you want to change the output voltage to a different value, like 1.5V. In the Config tab, type in 1.5 in the VOUT_COMMAND box, like this: http://linear.com/ltpowerplay 2.Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC2269A-A. The system tree on the left hand side should look like this: b.A green message box shows for a few seconds in the lower left hand corner, confirming that LTM4676 is communicating: Then, click the “W” (PC to RAM) icon to write these register values to the LTM4676. After finishing this step, you will see the output voltage will change to 1.5V. If the write is successful, you will see the following message: c. In the Toolbar, click the “R” (RAM to PC) icon to read the RAM from the TM4676. This reads the configuration from the RAM of LTM4676 and loads it into the GUI. e. You can save the changes into the NVM. In the tool bar, click “RAM to NVM” button, as following: f. Save the demo board configuration to a (*.proj) file. Click the Save icon and save the file. Name it whatever you want. dc2269aaf 7 DEMO MANUAL DC2269A-A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 6 CIN1, CIN2, CIN3, CIN4, CIN5, CIN6 CAP, 1210 10µF 10% 25V X5R MURATA GRM32DR61E106KA12L 2 2 CO1, CO6 CAP, 7343 330µF 20% 6.3V POSCAP PANASONIC 6TPF330M9L 3 5 CO2, CO3, CO4, CO5, CO7 CAP, 1210 100µF 10% 6.3V X5R AVX 12106D107KAT2A 4 2 C1, C5 CAP, 0603 2200pF 10% 50V X7R AVX 06035C222KAT2A 5 2 C9, C10 CAP, 0805 47µF 20% 6.3V X5R MURATA GRM21BR60J476ME15L 6 2 C12, C13 CAP, 0603 10µF 20% 25V X5R MURATA GRM188R61E106MA73J 7 1 D1 DIODE, SCHOTTKY BARRIER RECTIFIER DIODES INC. B0530WS-7-F 8 1 J2 HEADER, 4PIN 2mm STR DL HIROSE DF3A-4P-2DSA 9 1 L1 IND, 1.0µH COILCRAFT XAL5030-102MEC 10 3 R1, R22, R39 RES, 0603 100Ω 5% 0.1W VISHAY CRCW0603100RJNEA 11 2 R6, R33 RES, 0603 0Ω VISHAY CRCW06030000Z0EA 12 1 R7 RES, 0603 4.99kΩ 1% 0.1W VISHAY CRCW06034K99FKEA 13 10 R10, R11, R12, R13, R14, R15, R16, R17, R18, R21 RES, 0603 10kΩ 5% 0.1W VISHAY CRCW060310K0JNEA 14 1 R20 RES, 0603 4.22kΩ 1% 1/10W VISHAY CRCW06034K22FKEA 15 1 R29 RES, 0603 6.34kΩ 1% 0.1W VISHAY CRCW06036K34FKEA 16 3 R36, R37, R38 RES, 0603 10Ω 5% 0.1W VISHAY CRCW060310R0JNEA 17 1 U1 IC, VOLTAGE REGULATOR LGA LINEAR TECH. LTM4676EY#PBF Additional Demo Board Circuit Components 1 0 C2, C3, C4, C6, C7, C8, C11 CAP, 0603 OPTION OPTION 2 0 R2, R19, R31, R32 RES, 0805 OPTION OPTION 3 0 R3, R4, R5, R8, R9, R23, R24, R25, R27, R28 RES, 0603 OPTION OPTION 4 0 R35 RES, 1206 OPTION OPTION 0 R40 RES, 1210 OPTION OPTION CONN., CARD EDGE SAMTEC MEC2-20-01-L-DV--TR Hardware: For Demo Board Only 1 8 1 J1 dc2269aaf 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. VOUT1 VOUT0 VOS1+R VOS0-R VIN1 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 VOSNS0- VOS0-R VOS0+R VOS0+R VOUT0 SVIN CIN3 10uF 25V 1210 C7 OPT R22 100 C6 OPT VIN VIN GND GND GND GND GND N/A GND VOS1+ VOS1VOS2+ VOUT1 VOUT1 VOUT1 VOUT1 VOUT2 VOUT2 VOUT2 VOUT2 J1 VIN VIN GND GND GND GND GND N/A GND GND RUN1 RUN2 VOUT1 VOUT1 VOUT1 VOUT1 VOUT2 VOUT2 VOUT2 VOUT2 R38 10 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 E9 D9 E10 D10 G6 H6 R28 OPT R29 6.34k 1% R33 0 VOUT1 VOUT0 RUN1 RUN0 H5 R27 OPT VIN1 H4 G5 R25 OPT G4 P6 P4 D8 E8 C5 D5 F1 F2 E1 E2 A5 B10 F11 F12 A11 A12 B11 B12 C11 C12 D11 D12 E12 CIN6 10uF 25V 1210 R24 OPT C8 OPT R23 OPT OPT 0805 P3 CIN5 10uF 25V 1210 0 R6 R19 CIN4 10uF 25V 1210 VOSNS0- C5 2200pF VIN2 R37 10 4.22k 1% R20 CIN2 10uF 25V 1210 COMP0A CIN1 10uF 25V 1210 L1 1uH 1206 R35 OPT C12 10uF 25V SVIN SVIN VIN0 VIN0 VIN0 VIN0 VIN0 VIN0 VIN0 VIN0 VIN0 VTRIM1CFG VOUT1CFG VTRIM0CFG VOUT0CFG FSWPHCFG ASEL VOSNS0- VOSNS0+ VORB0- VORB0+ COMP0B COMP0A TSNS0B TSNS0A ISNS0B+ ISNS0A+ ISNS0BISNS0A- SNUB0 SW0 C13 10uF 25V H12 J11 J12 K11 K12 L11 L12 M11 M12 VIN1 VIN1 VIN1 VIN1 VIN1 VIN1 VIN1 VIN1 VIN1 P1 L10 R2 OPT 0805 R7 4.99k 1% C1 2200pF P2 OPT C2 LTM4676EY U1 R3 OPT COMP1A VOUT1 C9 47uF 6.3V 0805 R31 OPT 0805 VOUT0 R32 OPT 0805 VOUT1 330uF 6.3V 7343 + CO1 SY NC VDD33 INTVCC INTVCC SCL SDA GPIO0B GPIO1B E6 D6 E4 F4 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE R11 10K SVIN R12 10K C3 OPT SDA SCL DATE: N/A SIZE VOUT0 R40 OPT 1210 VOUT1 R13 10K TECHNOLOGY R14 10K R8 R16 10K VOSNS0- 330uF 6.3V + CO6 IC NO. Monday, October 13, 2014 DEMO CIRCUIT 2269A LTM4676EY SHEET 1 OF 1 2 REV. HIGH EFFICIENCY, DC/DC STEP-DOWN,µ MODULE REGULATOR WITH POWER SYSTEM MANAGEMENT LTC CONFIDENTIA L - FOR CUSTOM ER USE ONLY 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 C11 OPT R18 10K COMP1A RUN1 GPIO1B VOUT0 R17 10K CO5 100uF 6.3V 1210 OPT R5 OPT R4 OPT R39 100 CO4 100uF 6.3V 1210 R15 10K COMP0A RUN0 GPIO0B OPTIONAL JUMPER FOR DUAL PHASE SINGLE OUTPUT CONFIGURATION D1 B0520WS-7-F VDD33 VOS1+R R1 100 TITLE: SCHEMATIC 4 3 2 1 C10 47uF 6.3V 0805 10K R21 AUX3V4 SCL GND SDA APPROVALS C10 E11 H11 K10 A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3 P5 RUN1 F6 J6 RUN0 F5 J2 ALERTB E5 K6 SHARE_CLK H7 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; PCB DES. HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR DC2269A\1013\2269A-2.DSN ASSISTANCE. C:\PROJECTS\LTM4676\DEMO BOARD DNC DNC DNC DNC VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VDD25 RUN1 RUN0 WP GPIO1 GPIO0 SDA SCL ALERT R10 10K SYBC E7 OPT R9 R36 10 CO7 100uF 6.3V 1210 VDD33 C4 OPT CO3 100uF 6.3V 1210 J7 G9 F9 CO2 100uF 6.3V 1210 SHARE_CLK CUSTOMER NOTICE A4 A6 A7 A8 A9 A10 B4 B5 B6 B7 B8 B9 C4 C6 C7 C8 C9 D4 D7 E3 F3 F10 G3 G10 G11 G12 H3 H10 J4 J10 K4 K7 K8 K9 L4 L5 L6 L7 L8 L9 M4 M6 M7 M8 M9 M10 GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND SW1 M5 SNUB1 G2 G1 ISNS1AISNS1B- H2 H1 ISNS1A+ ISNS1B+ K5 J5 TSND1B TSNS1A H8 COMP1A J8 COMP1B J9 VCRB1 J1 J2 J3 K1 K2 K3 L1 L2 L3 M1 M2 M3 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 H9 VOSNS1 SGND SGND SGND SGND G7 G8 F7 F8 VIN1 DEMO MANUAL DC2269A-A Schematic Diagram dc2269aaf 9 DEMO MANUAL DC2269A-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 © 2004, Linear Technology Corporation 10 Linear Technology Corporation dc2269aaf LT 0515 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2015