DEMO MANUAL DC2394A LTC3887EUJ-1 Dual Output PolyPhase Step-Down DC/DC Converter with Digital Power System Management Description Demonstration circuit 2394A is a high current, high efficiency, dual output PolyPhase® synchronous buck converter featuring the LTC®3887EUJ-1, a dual-phase current mode controller. The LTC3887-1 has the PMBus interface and the power system management functions. This demo board uses DrMOS devices in the power stage and operates over an input voltage range from 7V to 14V. The output voltage can be programmed from 0.8V to 1.8V (1V by default) with an output current of up to 30A per phase. The DC2394A is configured as dual output with DCR current sensing. It also has an on-board dynamic load circuit, which makes it easy to evaluate the transient performance. The DC2394A powers up to default settings and produces power based on configuration resistors or with the configuration file loaded on its onboard EEPROM 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 LTC3887-1, download the GUI software LTpowerPlay® onto your PC and use LTC’s I2C/SMBus/PMBus Dongle 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. GUI DOWNLOAD The software can be downloaded from: http://www.linear.com/ltpowerplay For more details and instructions of LTpowerPlay, please refer to “LTpowerPlay for LTC3880 Quick Start Guide”. Design files for this circuit board are available at http://www.linear.com/demo/DC2394A L, LT, LTC, LTM, Linear Technology, PolyPhase, LTpowerPlay and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Performance Summary Specifications are at TA = 25°C SYMBOL PARAMETER CONDITIONS VIN Input Supply Range FSW Factory Default Switching VOUT0 CH0 Output Voltage Range IOUT0 CH0 Output Current Range MIN TYP MAX 7 12 14 350 IOUT0 = 0A TO 30A, VIN = 7.0V to 14V 0.8 1.0 0 EFF CH0 Full Load Efficiency VIN = 12V, VOUT0 = 1.0V, See Figures 4. VOUT1 CH1 Output Voltage Range IOUT1 = 0A TO 30A, VIN = 7.0V to 14V IOUT1 CH1 Output Current Range EFF CH1 Full Load Efficiency 1.0 0 VIN = 12V, VOUT1 = 1.0V, See Figures 4. 88.3 V kHz 1.8 V 30 A 88.3 0.8 UNITS % 1.8 V 30 A % dc2394af 1 DEMO MANUAL DC2394A Quick Start Procedure Demonstration circuit 2394A makes it easy to set up to evaluate the performances of the. Refer to Figure 2 for proper measurement equipment setup and follow the procedure below: NOTE: Normal note text normal note text normal note text normal note text. 1. Make sure jumpers are in the following positions: JUMPER POSITION FUNCTION JP1 NC GPIO0B to GPIO1B JP2 NC RUN0 to RUN1 JP3 INT INT/EXT PULSE JP4 OFF EXTVCC_DRV JP5 OFF PULSE GENERATOR 6. Check for the correct output voltage from VOUT0+ (E6) to VOUT0– (E7) for CH0, VOUT1 (E8) to GND (E9) for CH1. VOUT0/VOUT1 = 1.0V ± 0.5% (1.005V ~ 0.995V) NOTE. If there is no output, temporarily disconnect the load to make sure that the load is not set too high. 7. Once the proper output voltage is established, adjust the loads within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other parameters. 8. Connect the dongle and control the output voltage from the GUI. See “LTpowerPlay QUICK START” session for details. CONNECTING A PC TO DC2394A 2. With power off, connect the input power supply to VIN and GND. Connect active load to the output. 3. Make sure both RUN switches (SW1, SW2) are OFF. 4. Turn on the power at the input. NOTE. Make sure that the input voltage does not exceed 15V. 5. Turn on both SW2 (for RUN0), and SW1 (for RUN1) switches as desired. You can use a PC to reconfigure the power management features of the LTC3887-1 such as: nominal VOUT, margin set points, OV/UV limits, temperature fault limits, sequencing parameters, the fault log, fault responses, GPIO and other functionality. The DC1613A dongle may be plugged in regardless of whether or not VIN is present. Dongle can be hot plugged. +12V POWER SUPPLY USB CABLE USB TO I2C/PMBus DONGLE DC1613A VIN 12-PIN CONNECTOR VOUT0 LOAD LTC3887-1 DEMO BOARD DC2394A LOAD VOUT1 Figure 1. Demo Setup with PC 2 dc2394af DEMO MANUAL DC2394A Quick Start Procedure VOUT1 + RUN1 SW1 + + – + VIN – IIN – – IOUT1 SHUNT IOUT0 SHUNT VOUT1 LOAD POWER SUPPLY VOUT0 LOAD + – VOUT0 + RUN0 SW2 – Figure 2. Power Test Setup dc2394af 3 DEMO MANUAL DC2394A Quick Start Procedure MEASURING EFFICIENCY nn To accurately measure efficiency of any configuration, do the following: Set JP4 to OFF position to disable the auxiliary circuits. nn Apply external 5V for VDR; record voltage and current; Measure VIN across the input ceramic capacitor (C4 for CH0, C31 for CH1). Measure VOUT across the output ceramic capacitor (C14 for CH0, C36 for CH1). Add external 5V loss into efficiency calculation. nn + MEASURING OUTPUT RIPPLE VOLTAGE An accurate ripple measurement may be performed by using the below configuration across C14 for CH0, C36 for CH1. – COUT VOUT GND Figure 3. Measuring Output Voltage Ripple 95 VIN = 12V fSW = 350kHz EFFICIENCY (%) 90 85 80 VO = 1.0V VO = 1.5V 75 0 3 6 9 12 15 18 21 24 27 30 OUTPUT LOAD CURRENT (A) DC2394 F04 Figure 4. Typical Efficiency Curve of DC2394A, VIN = 12V, FSW = 350kHz 4 dc2394af DEMO MANUAL DC2394A Quick Start Procedure VOUT0 20mV/DIV IOUT0 5A/DIV 50µs/DIV DC2394 F05 Figure 5. Load Transient Waveform of DC2394A, VIN = 12V, VOUT0 = 1.0V, FSW = 350kHz, 75% to 100% (7.5A) Load Step Figure 6. Thermal Picture of DC2394A, VIN = 12V, VOUT0 = VOUT1 = 1.0V, IOUT0 = IOUT1 = 30A, FSW = 350kHz, No Airflow, TA = 25°C dc2394af 5 DEMO MANUAL DC2394A LTpowerPlay Software GUI LTpowerPlay is a powerful Windows based development environment that supports Linear Technology® power system management ICs, including the LTC3880, LTC3883, LTC3882, LTC3887 and LTC3887-1. 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 USB-to-SMBus controller to communicate with one of many potential targets, including the LTC3887-1’s DC2394A 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://www.linear.com/ltpowerplay To access technical support documents for LTC Digital Power Products visit Help. View online help on the LTpowerPlay menu. Figure 7. LTpowerPlay Main Interface* * NOTE: In LTpowerPlay, LTC3887 and LTC3887-1 use the same template. 6 dc2394af DEMO MANUAL DC2394A LTpowerPlay Quick Start Procedure The following procedure describes how to use LTpowerPlay to monitor and change the settings of LTC3887-1. 1. Download and install the LTpowerPlay GUI: http://www.linear.com/ltpowerplay 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: 2. Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC2394A. 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 the LTC3887-1 is communicating: c. In the Toolbar, click the “R” (RAM to PC) icon to read the RAM from the LTC3887-1. This reads the configuration from the RAM of LTC3887-1 and loads it into the GUI. Then, click the “W” (PC to RAM) icon to write these register values to the LTC3887-1. 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: dc2394af 7 DEMO MANUAL DC2394A LTpowerPlay Quick Start Procedure 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. Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 4 C4, C6, C31, C33 CAP., 22µF, X5R, 16V, 10%, 1210 MURATA, GRM32DR61C226KE18L 2 5 C5, C13, C39, C49, C51 CAP., 1µF, X5R, 16V, 10%, 0603 MURATA, GRM188R61C105KA93D 3 2 C7, C8 CAP., OS-CON, 330µF, 16V, 20%, F12 PANASONIC ELECTRONIC, 16SVP330M 4 4 C9, C18, C44, C47 CAP., 0.1µF, X7R, 16V, 10%, 0603 MURATA, GRM188R71C104KA01D 5 3 C10, C11, C56 CAP., 4.7µF, X5R, 16V, 10%, 0603 MURATA, GRM188R61C475KAAJD 6 12 C14, C15, C21, C22, C35, C36, C42, C43, C58, C59, C60, C61 CAP., X5R, 100µF, 6.3V, 20%, 1210 MURATA, GRM32ER60J107ME20L 7 8 C16, C17, C19, C20, C37, C38, C40, C41 CAP., POSCAP, 470µF, 2.5V, D2E SIZE PANASONIC ELECTRONIC, 2R5TPE470M9 8 2 C23, C24 CAP., X7R, 2200pF, 25V, 10%, 0603 MURATA, GRM188R71E222KA01D 9 3 C28, C29, C50 CAP., NPO, 150pF, 50V, 5%, 0603 MURATA, GRM1885C1H151JA01D 10 2 L1, L2 IND., 0.17µH PULSE., PA1320.171NL 11 2 R1, R12 RES., 24.9k, 1/16W, 1%, 0402 VISHAY, CRCW040224K9FKED 12 2 R2, R67 RES., 2Ω, 1/10W, 1%, 0603 VISHAY, CRCW06032R00FKEA 13 4 R3, R4, R16, R17 RES., 1k, 1/16W, 1%, 0402 VISHAY, CRCW04021K00FKED 14 2 R5, R18 RES., 0Ω, 1/16W, 0402 VISHAY, CRCW04020000Z0ED 15 4 R7, R8, R24, R25 RES., 2k, 1/10W, 1%, 0603 VISHAY, CRCW06032K00FKEA 16 6 R10, R13, R26, R49, R52, R55 RES., 0Ω, 1/10W, 0603 VISHAY, CRCW06030000Z0EA 17 2 R14, R15 RES., 17.8k, 1/10W, 1%, 0603 VISHAY, CRCW060317K8FKEA 18 2 U1, U3 I.C., MODULE, 60A, 31-LEAD, CLIP BOND PQFN, SPS, 5.0X5.0mm FAIRCHILD SEMI., FDMF5820DC 19 1 U2 I.C., LTC3887-1EUJ#PBF, QFN, 6X6mm LINEAR TECH., LTC3887EUJ-1#10E4-1PBF-ES 20 1 U4 I.C., EEPROM SERIAL-I2C, 2k-BIT, TSSOP-8 MICROCHIP, 24LC025-I/ST 21 1 U5 I.C., LTC6992CS6-1, TSOT-23 LINEAR TECH., LTC6992CS6-1#PBF 22 1 U6 I.C., LT1803IS5, TSOT-23 LINEAR TECH., LT1803IS5#PBF 23 2 U7, U8 I.C., LT1129CS8-5, S8 LINEAR TECH., LT1129CS8-5#PBF Additional Demo Board Circuit Components 1 4 C1, C2, C25, C26, CAP., 1µF, X5R, 16V, 10%, 0402 MURATA, GRM155R61C105KE01D 2 4 C3, C12, C27, C34, CAP., 0.1µF, X5R, 16V, 10%, 0402 MURATA, GRM155R61C104KA88D 3 4 C30, C32, C45, C46 CAP., X7R, 0.01µF, 16V, 10%, 0603 MURATA, GRM188R71C103KA01D 4 2 C48, C55 CAP., X5R, 2.2µF, 16V, 10%, 0805 MURATA, GRM21BR61C225KA88L 5 1 C52 CAP., 4.7µF, X5R, 16V, 1206 MURATA, GRM31CR61C475KA01L 6 1 C53 CAP., 1µF, X7R, 16V, 10%, 0805 MURATA, GRM21BR71C105KA01L 7 2 C54, C57 CAP., 1µF, X5R, 16V, 10%, 1206 MURATA, GRM31MR61C105KA01L 8 dc2394af DEMO MANUAL DC2394A Parts List ITEM QTY REFERENCE PART DESCRIPTION 8 9 MANUFACTURER/PART NUMBER 0 D3, D4 IND., OPTIONAL SOD-323 2 D1, D2 SMT CHIP LED, GREEN 10 1 D5 SMT CHIP LED, RED WURTH ELEKTRONIK, 150060RS75000 11 2 Q1, Q2 TRANS., PNP 40V 0.2A SC75-3 SOT-416 ON SEMI., MMBT3906TT1G 12 2 Q3, Q4 MOSFET, N-CH 60V 115MA SOT23-3 DIODES INC., 2N7002-7-F 13 2 Q5, Q7 MOSFET, P-CH 20V 0.58A SOT-23 VISHAY, SI2365EDS-T1-GE3 14 1 Q6 MOSFET, SPEED SRS 30V 30A LFPAK RENESAS, RJK0305DPB-02#J0 15 0 R6, R11, R21, R22, R23, R28, R30, R31, RES., OPTIONAL 0603 R33, R34, R36, R37, R39, R40, R45, R48, R50, R54, R56, R57, R62, R64, R65, R68 16 11 R19, R20, R27, R29, R32, R35, R38, R51, RES., 4.99k, 1/10W, 1%, 0603 R53, R60, R61 VISHAY, CRCW06034K99FKEA 17 2 R46, R47 RES., 200Ω, 1/10W, 1%, 0603 VISHAY, CRCW0603200RFKEA 18 3 R58, R59, R77 RES., 10Ω, 1/10W, 1%, 0603 VISHAY, CRCW060310R0FKEA 19 1 R63 RES., 127Ω, 1/10W, 1%, 0603 VISHAY, CRCW0603127RFKEA 20 1 R66 RES., SENSE, 0.001Ω, 1W, 1%, 2512 PANASONIC, ERJM1WTF1M0U 21 2 R69, R76 RES., 20k, 1/10W, 1%, 0603 VISHAY, CRCW060320K0FKEA 22 2 R70, R81 RES., 100k, 1/10W, 1%, 0603 VISHAY, CRCW00603100KFKEA 23 1 R71 RES., 3.3Ω, 1/10W, 1%, 0603 VISHAY, CRCW06033R30FKEA 24 1 R72 RES., CHIP, 1M, 1%, 0603 VISHAY, CRCW06031M00FKEA 25 1 R73 RES., 154k, 1/10W, 1%, 0603 VISHAY, CRCW0603154KFKEA 26 2 R74, R82 RES., 10k, 1/10W, 1%, 0603 VISHAY, CRCW060310K0FKEA 27 1 R75 RES., 82.5Ω, 1/10W, 1%, 0603 VISHAY, CRCW060382R5FKEA 28 1 R78 RES., 681k, 1/10W, 1%, 0603 VISHAY, CRCW0603681KFKEA 29 1 R79 TRIMMER, 5kΩ 0.5W PC PIN BOURNS, 3386P-1-502LF 30 1 R80 RES., SENSE, 0.01Ω, 1W, 1%, 2512 PANASONIC, ERJM1WSF10MU 31 1 R83 RES., 15.8k, 1/10W, 1%, 0603 VISHAY, CRCW060315K8FKEA WURTH ELEKTRONIK, 150060GS75000 Hardware: For Demo Board Only 1 21 E1-E21 TEST POINT, TURRET, .064" MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0 2 2 SW1, SW2 SWITCH, SLIDE DPDT 6VDC 0.3A PCMNT C&K COMPONENTS, JS202011CQN 3 5 JP1-JP5 CONN., HEADER, 1X3, 2mm WURTH ELEKTRONIK, 62000311121 4 2 J1, J2 JACK, BANANA KEYSTONE, 575-4 5 8 J3-J6 (x 2) STUD, TEST PIN PEM KFH-032-10 6 8 J3-J6 (x 2) NUT, BRASS 10-32 ANY, #10-32M/S 7 4 J3-J6 RING, LUG #10 KEYSTONE, 8205 8 4 J3-J6 WASHER, TIN PLATED BRASS ANY, #10 9 1 J7 CONN. HEADER 12 POS 2mm STR DL PCB FCI, 98414-G06-12ULF 10 1 J8 CONN., HEADER, 2X7, 2mm, R/A (M) MOLEX, 87760-1416 11 1 J9 CONN., HEADER, 2X7, 2mm, R/A (F) SULLINS, NPPN072FJFN-RC 12 3 J10, J11, J12 CONN, BNC, 5 PINS CONNEX, 112404 13 3 XJP1, XJP2, XJP5 SHUNT, 2mm WURTH ELEKTRONIK, 60800213421 14 4 MT1, MT2, MT3, MT4 STANDOFF, NYLON, SNAP-ON, 0.500" WURTH ELEKTRONIK, 702936000 dc2394af 9 A B C D VIN VDD33 GND GND 7V-14V E4 E5 J2 R38 5K R35 5K R32 5K R29 5K R27 5K R20 5K R19 5K C28 150pF R11 OPT 5 R14 17.8K C23 2200pF + RUN1 RUN0 GPIO1B GPIO0B ALERTB SDA SCL SYNC C8 330uF 16V R15 17.8K C24 2200pF SYNC SHARE_CLK GPIO1B GPIO0B ALERTB SDA SCL R2 VDD25 2 C30 0.01uF R39 OPT R36 OPT R33 OPT R30 OPT R28 OPT R21 OPT Q2 MMBT3906LT SHARE_CLK + Q1 MMBT3906LT C29 150pF C7 330uF 16V VIN TSNS0 TSNS1 ITH0 ITH1 WP R23 OPT R40 OPT R37 OPT R34 OPT R31 OPT 4.7uF C10 INTVCC SHARE_CLK RUN1 RUN0 GPIO1 GPIO0 ALERT SDA SCL SYNC R22 OPT C32 0.01uF 40 28 5 26 23 24 15 14 13 12 11 10 9 8 C9 0.1uF ASEL0 16 J1 35 VIN ASEL1 17 33 4 VDD25 U2 LTC3887-1EUJ 1uF C5 VDD25 INTVCC E2 VSENSE1 ISNS1- ISNS1+ PWM1 NC NC NC NC VSENSE0- VSENSE0+ ISNS0- ISNS0+ PWM0 VSENSE1 35 27 2 31 1 27 4 3 30 36 39 29 32 2 VDR TP3 VSENSE1 OPT VSENSE0- R17 1K R16 1K VDR 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. 2. INSTALL SHUNTS AS SHOWN. 3 PGND PGND PGND GL GL ZCD# 28 15 34 35 27 2 31 1 GL R12 25K PGND PGND PGND GL GL ZCD# GL EN/FAULT# PWM C26 C27 1uF 0.1uF 28 R1 25K EN/FAULT# PWM C3 0.1uF 15 PWM1 1K R4 C2 1uF 34 R6 1K R3 VDR 1 VSENSE0+ VDR PWM0 TP2 7 6 38 C11 4.7uF VDD33 VDD33 3 NOTE: UNLESS OTHERWISE SPECIFIED PHAS_CFG FREQ_CFG VOUT1_CFG VOUT0_CFG ASEL1 ASEL0 E3 30 VIN VOUT0_CFG 18 22 21 4 PHAS_CFG E1 GND 41 INTVCC VOUT1_CFG 19 VDD25 FREQ_CFG 20 25 VDD33 37 VCC0 31 VCC1 PGND 34 3 VCC PGND 14 3 VCC PGND 14 32 12 TMON PGND 13 30 1uF C1 4 U1 AGND AGND 32 29 1uF C25 U3 AGND VDR VIN FDMF5820DC PGND PVCC VDR VIN FDMF5820DC PGND 9 SW SW SW SW SW PHASE BOOT VIN VIN VIN SW SW SW SW SW PHASE BOOT VIN VIN VIN 20 19 18 17 16 7 5 33 11 10 20 19 18 17 16 7 5 33 11 10 R5 0 C18 R7 2k C34 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. VIN R25 2k C21 C39 1uF SCALE = NONE HZ YI S. PCB DES. APP ENG. C35 C36 TECHNOLOGY VOUT0+ GND VOUT0 VOUT1 VOUT0- VOUT1 GND GND DATE 11-18-15 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only E9 VSENSE1 E8 J6 1.0V/30A J5 E7 VSENSE0- VSENSE0+ E6 J4 1.0V/30A J3 YI S. / H. Wu APPROVED DATE: N/A SIZE DC2394A 1 LTC3887-1EUJ Wednesday, November 18, 2015 IC NO. SHEET 1 1 OF 2 REV. HIGH DENSITY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT TITLE: SCHEMATIC C40 470uF C41 470uF R26 0 C38 470uF + + C37 470uF + R13 0 + 1210 100uF 100uF 1210 C43 1210 100uF C20 OPT C19 OPT VOUT1 + + R10 0 C17 470uF C16 470uF 100uF 1210 PRODUCTION + VOUT0 1 REVISION HISTORY DESCRIPTION + 1 REV C15 100uF 1210 C22 100uF 1210 100uF 1210 C42 C60 100uF 1210 C61 __ ECO C14 100uF 1210 100uF 1210 C58 100uF 1210 C59 C13 1uF 100uF 1210 C33 22uF 1210 2k R8 C6 22uF 1210 APPROVALS 100nF 0.17uH C44 R24 2k C31 22uF 1210 L2 100nF VIN 100nF 0.17uH L1 C4 22uF 1210 2 100nF R18 0 C12 CUSTOMER NOTICE 25 TMON PGND 13 AGND SW 26 4 SW SW PGND 12 23 6 25 29 PVCC SW 24 SW 24 AGND PGND 6 NC 23 AGND SW 26 8 VIN SW 22 VIN SW 21 9 SW NC SW VIN SW 8 VIN SW 22 10 21 5 A B C D DEMO MANUAL DC2394A Schematic Diagram dc2394af 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 GND 4 3 2 1 SDA SCL WP VCC E19 24LC025-I/ST VSS A2 A1 A0 U4 TO DC1613A AUXP SDA GND SCL LGKPWR ALERTB GPIO_1 OUTEN_0 OUTEN_1 GND AUXSCL AUXSDA J7 100nF C47 VIN VIN 5 6 7 OFF ON JP4 DrMOS VDR EESDA EESCL EEWP 8 AUXVCC 1 2 3 4 5 6 7 8 9 10 11 12 3V3 5 OFF ON JP5 2 PULSE GENERATOR 2 R81 100K R70 100K C57 1uF C54 1uF 8 7 6 5 8 7 6 5 R60 4.99K GND GND VIN GND NC GND LT1129CS8-5 OUTPUT SENSE/ADJ U8 NC OUTPUT SENSE/ADJ LT1129CS8-5 SHDN VIN GND GND SHDN U7 R61 4.99K ALERTB 1 2 3 4 1 2 3 4 E10 FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V J8 SCL +5V C56 4.7uF VDR C52 4.7uF OPT R65 OPT R64 4 E21 E20 DEMO HEADER (M) SDA E11 GND VDR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SCL R76 20K E12 154K R73 VIN 3V3 3 2 1 VIN R54 OPT R62 OPT 1206 DIV V+ OUT LTC6992-1 3V3 SYNC 3 10K R82 TP0101K Q7 4 5 6 R55 0 E14 R83 15.8K 2 VDD33 70Hz, 3% Duty Cycle SET GND MOD U5 SHARE_CLK E13 SHARE_CLK R78 681K R72 1M R56 OPT SYNC 3 3 LOAD STEP C51 1uF 0603 J9 R79 5K R77 10 1% R69 20K 3 2 5 -IN VOUT U6 2 LT1803IS5 +IN V- V+ RUN0 GPIO0B OFF 5 ON 4 1 3 1 OFF 5 ON SW2 RUN0 C50 150pF C NC RUN0-RUN1 1 C NC GPIO0-GPIO1 JP2 3 JP1 C45 10nF R58 10 D4 OPT THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE +5V R50 OPT SW1 RUN1 D3 OPT R48 OPT 2 2 C46 10nF R59 10 3 INT EXT SCALE = NONE HZ YI S. PCB DES. APP ENG. 4 R67 2 E15 1 3V3 R80 0.01 2512 Q3 2N7002A D1 GPIO1B GRN R46 200 C55 2.2uF 0805 VOUT1 C53 1uF 0805 C48 2.2uF 0805 1 1 VOUT0 1 R63 127 J10 E18 E17 ALERTB RED D5 TP0101K Q5 1 GPIO0B Q4 2N7002A D2 GPIO0B GRN R47 200 EXT PULSE VOUT1 IOUT TST VOUT0 GND J11 J12 3V3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 1 E16 3V3 GPIO0B 1 DATE: N/A SIZE DC2394A 1 LTC3887-1EUJ Wednesday, November 18, 2015 IC NO. SHEET 2 1 OF 2 REV. HIGH DENSITY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT TECHNOLOGY VOUT1 VOUT0 ALERTB RJK0305DPB Q6 OPT 2512 2512 R68 R66 0.001 GPIO1B TITLE: SCHEMATIC R74 10K RUN1 GPIO1B RUN0 GPIO0B GPIO1B INT / EXT PULSE JP3 APPROVALS 1 RUN1 GPIO1B 2 R53 5K R51 5K VDD33 VDD33 82.5 R75 3.3 R71 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. C49 1uF 0603 DEMO HEADER (F) FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V OPT R57 +5V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 0 R52 0 R49 OPT R45 4 1 6 3 4 2 2 4 1 6 3 SDA 2 2 1 3 2 D 3 1 3 1 5 1 2 3 2 3 2 1 2 1 3 2 ALERTB 1 2 3 4 5 2 3 4 5 2 3 4 5 5 A B C D DEMO MANUAL DC2394A Schematic Diagram dc2394af 11 DEMO MANUAL DC2394A 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 12 Linear Technology Corporation dc2394af 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