Mixed-signal and digital signal processing ICs | Analog Devices
Instruction Manual for LINEAR TECHNOLOGY models including: DC2088A, DC2088A DC Converter with Power System Management, DC Converter with Power System Management, Power System Management, System Management
DC2088A Analog Devices Inc. - RADIOMAG GmbH
File Info : application/pdf, 12 Pages, 1.27MB
DocumentDocumentDEMO MANUAL DC2088A DESCRIPTION High Density LTC3880 Step-Down DC/DC Converter with Power System Management Demonstration circuit 2088A is a high current, high density, two-phase single output synchronous buck converter featuring the LTC3880EUJ, a dual-phase current mode controller. The LTC®3880 has the PMBus interface and power system management functions. The layout of DC2088A is very compact and the total solution is within a 1.0" × 1.0" area. The DrMOS is used on the board for high current, high efficiency. The input range of this board is from 7V to 14V, and the output voltage can be programmed from 0.8V to 1.8V, with an output current up to 50A. The factory default setting for the output is 1.0V. The DC2088A also has an on-board dynamic load circuit, which makes it easy for the customer to evaluate the transient performances. The DC2088A powers up to default settings and produces power based on configuration resistors or NVM without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter aspects of the LTC3880. To fully explore the extensive power system management features of the parts, 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: www.linear.com/ltpowerplay For more details and instructions on LTpowerPlay, please refer to "LTpowerPlay for LTC3880 Quick Start Guide". Design files for this circuit board are available at http://www.linear.com/demo L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. PERFORMANCE SUMMARY SYMBOL VIN VOUT IOUT fSW EFF PARAMETER Input Supply Range Output Voltage Range Output Current Range Factory Default Switching Peak Efficiency Specifications are at TA = 25°C CONDITIONS IOUT = 0A TO 50A, VIN = 7.0V to 14V VOUT = 1.0V, See Figures 4. MIN TYP MAX 7 12 14 0.8 1.0 1.8 0 50 425 87.8 UNITS V V A kHz % Downloaded from Arrow.com. dc2088af 1 DEMO MANUAL DC2088A QUICK START PROCEDURE Demonstration circuit 2088A makes it easy to set up to evaluate the performances of the LTC3880. Refer to Figure 2 for proper measurement equipment setup and follow the procedure below: NOTE. When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip directly across the C14. See Figure 3 for proper scope probe technique. 1. Make sure jumpers are in the following positions: JUMPER JP1 JP2 POSITION ON OFF FUNCTION Drives ON LED 2. With power off, connect the input power supply to VIN and GND. Connect active load to the output. 3. Make sure RUN switch (SW) is OFF. 4. Turn on the power at the input. NOTE. Make sure that the input voltage does not exceed 16V. 5. Turn on RUN switch as desired. 6. Check for the correct output voltage from E4 to E6. VOUT = 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 voltages from the GUI. See "LTpowerPlay QUICK START" session for details. 2 Downloaded from Arrow.com. dc2088af DEMO MANUAL DC2088A QUICK START PROCEDURE CONNECTING A PC TO DC2088A You can use a PC to reconfigure the power management features of the LTC3880 such as: nominal VOUT, margin set points, OV/UV limits, temperature fault limits, sequenc- ing 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. The Dongle can be hot plugged. USB CABLE USB TO 12C/PMBus DONGLE DC1613A 12-PIN CONNECTOR +12V POWER SUPPLY VIN DEMO BOARD DC2088A Figure 1. Demo Setup with PC POWER SUPPLY DC1613A CONNECTOR RUN SWITCH + IIN + VIN VOUT + VOUT LOAD dc2088a F01 + + SHUNT LOAD Figure 2. Power Test Setup dc2088a F02 Downloaded from Arrow.com. dc2088af 3 DEMO MANUAL DC2088A QUICK START PROCEDURE MEASURING EFFICIENCY (SEE FIGURE 2) · To accurately measure efficiency of any configuration, do the following: · Set JP1, JP2 to OFF position to disable all the auxiliary circuits. · Make sure R4, R10 not stuffed. · Provide an external 5V for the gate drive, and connect it to E15 and E16. · Measure VIN across the input ceramic capacitor (C29). Measure VOUT across the output ceramic capacitor (C14). Add the driver loss (VDR · IDR) to the total efficiency calculation. EVALUATING THE LTC3880-1 For applications that require the highest possible efficiency, the LTC3880-1 allows the user to supply the bias voltage and gate driver current from an external power supply. Please install R4 (0). Then, the 5V gate drive for the DrMOS will also provide power to the EXTVCC. To accurately measure efficiency of a demo board containing the LTC3880-1, · Set JP1, JP2 to OFF to disable the LDO. · Connect an external 5V power supply to E15, E16. · Measure VIN across the input ceramic capacitor (C29). Measure VOUT across the output ceramic capacitor (C14). MEASURING OUTPUT RIPPLE VOLTAGE An accurate ripple measurement may be performed by using the below configuration across C16. + COUT VOUT GND Figure 3. Measuring Output Voltage Ripple 4 Downloaded from Arrow.com. dc2088af DEMO MANUAL DC2088A QUICK START PROCEDURE EFFICIENCY (%) 90 89 88 87 86 85 84 83 82 81 80 0 10 12VIN 1.0VOUT 425kHz 12VIN 0.9VOUT 425kHz 12VIN 1.2VOUT 425kHz 20 30 40 LOAD CURRENT (A) 50 60 dc2088a F04 Figure 4. Typical Efficiency Curves DC2088A, 12VIN, fSW = 425kHz, VOUT = 1.2V, 1.0V, 0.9V LTpowerPlay Software GUI LTpowerPlay is a powerful Windows based development environment that supports Linear Technology power system management ICs, including the LTC3880, 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 USB-to-SMBus controller to communicate with one of many potential targets, including the LTC3880's DC2088A 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: www.linear.com/ltpowerplay To access technical support documents for LTC Digital Power Products visit Help. View online help on the LTpowerPlay menu. Downloaded from Arrow.com. dc2088af 5 DEMO MANUAL DC2088A QUICK START PROCEDURE Figure 3. Measuring Output Voltage Ripple LTpowerPlay QUICK START PROCEDURE The following procedure describes how to use LTpowerPlay to monitor and change the settings of LTC3880. 1. Download and install the LTPowerPlay GUI: http://linear.com/ltpowerplay 2. Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC2088A. The system tree on the left hand side should look like this: 6 Downloaded from Arrow.com. dc2088af QUICK START PROCEDURE b. A green message box shows for a few seconds in the lower left hand corner, confirming that the LTC3880 and the LTC3883 are communicating: DEMO MANUAL DC2088A Then, click the "W" (PC to RAM) icon to write these register values to the LTC3880 and the LTC3883. 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 LTC3880 and the LTC3883. This reads the configuration from the RAM of LTC3883 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 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: f. Save the demo board configuration to a (*.proj) file. Click the Save icon and save the file. Name it whatever you want. Downloaded from Arrow.com. dc2088af 7 DEMO MANUAL DC2088A PARTS LIST ITEM QTY REFERENCE Required Circuit Components 1 4 C1, C2, C28, C29 2 2 C5, C30 3 6 C4, C10, C11, C16, C27, C36 4 1 C6 5 3 C3, C9, C26 6 2 C7, C8 7 20 C12-C15, C17, C31-C35, C43-C52 8 2 C18, C19 9 2 C22, C37 10 1 C23 11 1 C24 12 1 C25 13 2 L1, L2 14 1 Q1 15 1 Q3 16 6 R2, R11, R12, R16, R17, R30 17 4 R1, R13, R36, R66 18 2 R3, R15 19 2 R7, R19 20 5 R18, R20, R22, R24, R39 21 1 R6 22 4 R8, R9, R25, R27 23 1 R14 24 1 R23 25 1 R28 26 1 R31 27 1 R33 28 1 R34 29 1 R40 30 2 U1, U3 31 1 U2 Additional Circuit Components 1 2 CBYP1, CBYP2 2 2 COUT1, COUT2 3 1 C40 4 1 C41 5 1 C39 6 0 C20, C21, C53, C54 7 1 C38 8 1 C42 9 1 C55 PART DESCRIPTION CAP., X5R, 22µF, 25V, 10%,1210 CAP., X5R, 1µF, 10V, 20%, 0603 CAP., X5R, 1µF, 10V, 20%, 0402 CAP., X5R, 10µF, 10V, 20%, 0603 CAP., X7R, 0.1µF, 25V, 10%, 0603 CAP., OS-CON, 330µF, 16V, 20% CAP., X5R, 100µF, 6.3V, 20%,1206 CAP., POSCAP, 470µF, 2.5V, D2E CAP., X5R, 0.22µF, 16V, 20%, 0402 CAP., X7R, 1nF, 25V, 10%, 0402 CAP., NPO, 100pF,25V, 10%, 0402 CAP., X5R, 10nF, 25V, 10%, 0402 INDUCTOR, SMT POWER IND. 0.16µH TRANS GP SS PNP 40V SOT-23 MOSFET P-CH 20V, 0.58A, SOT-23 RES., CHIP, 0, 1%, 0402 RES., CHIP, 0, 1%, 0603 RES., CHIP, 10, 1%, 0603 RES., CHIP, 10k, 1%, 0402 RES., CHIP, 10k, 1%, 0603 RES., CHIP, 1, 1%, 0402 RES., CHIP, 825, 1%, 0402 RES., CHIP, 6.81k, 1%, 0402 RES., CHIP, 20k, 1%, 0402 RES., CHIP, 17.8k, 1%, 0402 RES., CHIP, 16.2k, 1%, 0603 RES., CHIP, 24.9k, 1%, 0603 RES., CHIP, 4.32k, 1%, 0603 RES., CHIP, 15.8k, 1%, 0603 IC, HIGH FREQUENCY DrMOS MOUDLE IC, LTC3880EUJ, QFN 6mm × 6mm CAP., X7R, 0.01µF,16V, 10%, 0603 CAP., X5R, 10µF,25V, 20%,1206 CAP., X7R, 1µF, 16V, 10%, 1206 CAP., X7R, 0.1µF, 25V, 10%, 0603 CAP., X5R, 1µF, 16V, 20%, 0805 CAP., POSCAP, 470µF, 2.5V, D2E CAP., X5R, 2.2µF, 16V, 10%, 0805 CAP., X5R, 10nF, 25V, 10%, 0603 CAP., X7R, 0.1µF,16V, 10%, 0603 MANUFACTURER/PART NUMBER AVX, 12103D226KAT AVX, 0603ZD105MAT2A AVX, 0402ZD105MAT2A SAMSUNG, CL10A106MP8NNNC AVX, 06033C104KAT SANYO, 16SVP330M TAYO YUDEN, JMK316BJ107ML-T SANYO 2R5TPE470M9 TDK, C1005X5R1C224M AVX, 04023C102KAT2A AVX,04023A101KAT2A AVX, 04023D103KAT2A COILCRAFT., XAL7070-161ME ON SEMI MMBT3906LT1G VISHAY, TP0101K-T1-E3 VISHAY, CRCW04020000Z0ED VISHAY, CRCW06030000Z0EA VISHAY, CRCW060310R0FKEA VISHAY, CRCW040210K0FKED VISHAY, CRCW060310K0FKEA VISHAY, CRCW04021R00FKED VISHAY, CRCW0402825RJNED VISHAY, CRCW04026K81FKED VISHAY,CRCW040220K0FKED VISHAY,CRCW040217K8FKED VISHAY, CRCW060316K2FKEA VISHAY, CRCW060324K9FKEA VISHAY, CRCW06034K32FKEA VISHAY, CRCW060315K8FKEA FAIRCHILD, FDMF6823A LTC., LTC3880EUJ#PBF AVX, 0603YC103KAT TDK, C3216X7R1E106M AVX, 1206YC105KAT AVX, 06033C104KAT AVX, 0805YD105MAT SANYO 2R5TPE470M9 AVX, 0805YD225KAT AVX, 06033D103KAT AVX, 0603YC104KAT 8 Downloaded from Arrow.com. dc2088af DEMO MANUAL DC2088A PARTS LIST ITEM QTY 10 1 11 1 12 1 13 1 14 1 15 1 16 7 17 1 18 2 19 2 20 1 21 0 22 0 23 0 24 1 25 1 26 1 27 2 28 1 29 1 30 2 31 1 32 1 Hardware 1 8 2 2 3 2 4 4 5 2 6 2 7 2 8 1 9 1 10 1 11 2 12 2 13 1 14 4 15 1 REFERENCE PART DESCRIPTION D1 LED GREEN S-GW TYPE SMD D2 LED RED S-TYPE GULL WING SMD D3 DIODE, SCHOTTKY, SOD-323 Q2 MOSFET SPEED SRS 30V 30A LFPAK Q3 MOSFET P-CH 20V 0.58A SOT-23 Q5 MOSFET N-CH 60V 115MA SOT-23 R54-R60 RES., CHIP, 0, 1%, 0603 R51 RES., CHIP, 10, 1%, 0603 R38, R48 RES., CHIP, 10k, 1%, 0603 R43, R44, RES., CHIP, 100k, 1%, 0603 R10 RES., CHIP, 30, 1%, 2512 R21, R62, R63 (OPT) RES., 0402 R4, R5, R26, R29, R32, R35 (OPT) RES., 0603 R47 (OPT) RES., 0805 R37 RES., CHIP, 200, 1%, 0603 R41 RESISTOR .010 1W, 1% 2512 R42 RES., CHIP, 127, 1%, 0603 R45, R46 RES., CHIP, 4.99k, 1%, 0603 R49 RES., CHIP, 6.19k, 1%, 0603 R50 RES., CHIP, 3.4k, 1%, 0603 R52, R53 RES., CHIP, 2k, 1%, 0603 U4 IC, SERIAL EEPROM U5 IC, LT3029IMSE, MSOP, 16 PIN E1, E2, E4, E6, E11, E12, E15, E16 TESTPOINT, TURRET, .062" J1, J2 JACK, BANANA J3, J4 STUD, TEST PIN J3, J4(X2) NUT, BRASS 10-32 J3, J4 RING, LUG #10 J3, J4 WASHER, TIN PLATED BRASS J5, J7 CONN, BNC, 5-PINS J6 CONN HEADER 12POS 2mm STR DL PCB J8 HEADER., DOUBLE ROW, RIGHT ANGLE 2 × 5 PIN J9 SOCKET, DOUBLE ROW, 2 × 5 PIN JP1, JP2 HEADER 3 PIN 0.079 SINGLE ROW JP1, JP2 SHUNT SW SWITCH SLIDE 1PDT 6VDC 0.3A SMT STANDOFF STANDOFF, SNAP ON STENCIL STENCIL MANUFACTURER/PART NUMBER ROHM, SML-010FTT86L ROHM, SML-010VTT86L CENTRAL CMDSH-3TR RENESAS, RJK0305DPB-00#J0 VISHAY, TP0101K-T1-E3 FAIRCHILD, 2N7002A-7-F VISHAY, CRCW06030000Z0EA VISHAY, CRCW060310R0FKEA VISHAY, CRCW060310K0FKEA VISHAY, CRCW0603100KFKEA VISHAY, CRCW251230R0FKEA VISHAY, CRCW0603200RFKEA PANASONIC, ERJ-M1WSF10MU VISHAY, CRCW0603127RFKEA VISHAY, CRCW06034K99FKEA VISHAY, CRCW06036K19FKEA VISHAY, CRCW06033K40FKEA VISHAY, CRCW06032K00FKEA MICROCHIP 24LC025-I/ST LTC., LT3029IMSE#PBF MILL-MAX, 2308-2-00-80-00-00-07-0 KEYSTONE 575-4 PEM KFH-032-10 ANY #10-32 KEYSTONE, 8205, #10 ANY #10 CONNEX, 112404 FCI 98414-G06-12ULF MILL-MAX 802-40-010-20-001000 MILL-MAX 803-43-010-20-001000 SULLIN, NRPN031PAEN-RC SAMTEC, 2SN-BK-G C & K JS102011SAQN KEYSTONE_8831 Downloaded from Arrow.com. dc2088af 9 DEMO MANUAL DC2088A SCHEMATIC DIAGRAM 10 Downloaded from Arrow.com. 5 4 3 2 1 REVISION HISTORY ECO REV DESCRIPTION APPROVED DATE __ 1 PRODUCTION YI S. 2-13-13 D D R1 0 VDR VIN VDR C1 22uF 1210 C2 22uF 1210 C3 100nF C4 1uF 16V R3 10 C5 1uF R5 OPT 10 VIN 9 VIN 42 VIN 8 NC 7 PHASE 6 GH 5 CGND 41 GND 4 BOOT 3 VDRV 2 VCIN 1 SMOD# R4 INTVCC OPT BG0 E1 VIN J1 VIN 7V-14V J2 GND E2 GND VIN + C7 330uF 16V SVP + C8 330uF 16V SVP SCL VDD33 R7 10k R6 1 C9 100nF 9 SCL 35 VIN INTVCC VDD25 VDD33 C10 C11 1uF 1uF VDD25 VDD33 C6 10uF 38 TG0 11 VIN 12 VIN 13 VIN 14 VIN 15 VSWH 16 PGND 17 PGND 18 PGND 19 PGND 20 PGND U1 FDMF6823A 40 PWM 39 DISB# 38 NC 37 CGND 36 GL 35 VSWH 34 VSWH 33 VSWH 32 VSWH 31 VSWH R2 0 GPIO0B L1 0.16uH C16 R8 R9 825 825 1uF VOUT C12 C13 C17 100uF 100uF 100uF 1210 1210 1210 C14 100uF 1210 C15 100uF 1210 VOUT J3 VOUT + + + + + + R10 C53 C54 C18 C19 C20 470uF 470uF 470uF 470uF OPT C21 OPT 30 1W J4 25 VDD33 22 VDD25 33 INTVCC 21 PGND 22 PGND 23 PGND 24 PGND 25 PGND 26 PGND 27 PGND 28 PGND 43 29 VSWH 30 VSWH VSWH SDA 10 SDA 37 BOOST0 C22 0.22uF GND C SYNC_A 8 SYNC 39 SW0 C ALERTB C23 1nF C24 100pF R14 6.81K ITH Q1 C25 10nF RUN WP 11 ALERT 26 ITH1 5 ITH0 28 TSNS1 40 TSNS0 15 RUN1 14 RUN0 23 WP U2 LTC3880EUJ 36 BG0 6 ISNS0+ BG0 7 ISNS0- 1 VSENSE0+ 2 VSENSE0- 30 TG1 31 BOOST1 29 SW1 R13 0 VDR VIN C28 22uF 1210 C29 22uF 1210 C26 100nF C27 1uF R15 16V 10 C30 1uF R63 OPT C47 C43 C46 100uF 100uF 100uF 1210 1210 1210 C45 100uF 1210 C44 100uF R11 R21 R12 R62 0 OPT 0 OPT VSNSP VSNSN E4 VOUT+ E6 VOUT- VDD33 R18 10k R20 10k SCL SDA R17 0 VDD33 SHARE_CLOCK R19 10K SHARE_CLOCK 24 SC 16 ASEL 17 FREQ_CFG 32 BG1 BG1 3 ISNS1+ 4 ISNS1- 27 VSENSE1 11 VIN 12 VIN 10 VIN 9 VIN 42 VIN 8 NC 7 PHASE 6 GH 5 CGND 41 GND 4 BOOT 3 VDRV 2 VCIN 1 SMOD# BG1 40 PWM 39 DISB# GPIO0B 41 GND 34 PGND 12 GPIO0 13 GPIO1 18 VOUT0_CFG 19 VOUT1_CFG 20 VTRIM0_CFG 21 VTRIM1_CFG FREQ_CFG 13 VIN 38 NC R16 0 R22 10k ALERTB VDD25 14 VIN 15 VSWH 37 CGND 36 GL L2 VOUT0_CFG VTRIM_CFG R24 10k GPIO0B R23 20K 16 PGND 17 35 VSWH 34 0.16uH R66 B 0 R26 OPT GPIO1B ADDRESS: 0X4B R28 SGND AND PGND CONNECTED AT A SINGLE NODE GPIO1B GPIO0B PGND 18 PGND 19 PGND U3 FDMF6823A VSWH 33 VSWH 32 VSWH R27 R25 C36 825 825 1uF C31 C32 C33 100uF 100uF 100uF 1210 1210 1210 C34 C35 100uF 100uF 1210 1210 B 17.8K NEAR U2 20 PGND 31 VSWH R29 OPT WP R30 0 C37 0.22uF 21 PGND 22 PGND 23 PGND 24 PGND 25 PGND 26 PGND 27 PGND 28 PGND 43 29 VSWH 30 VSWH VSWH VDD25 R31 16.2k FREQ_CFG R32 17.4k C49 C51 C52 100uF 100uF 100uF 1210 1210 1210 C50 C48 100uF 100uF 1210 1210 R33 24.9k VOUT_CFG R34 4.32k R35 OPT VTRIM_CFG R36 0 NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. 2. INSTALL SHUNTS AS SHOWN. A A CUSTOMER NOTICE APPROVALS 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. HZ VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. YI S. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE TECHNOLOGY TITLE: SCHEMATIC 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only HIGH DENSITY DC / DC CONVERTER WITH POWER SYSTEM MANAGEMENT SIZE IC NO. LTC3880EUJ REV. N/A DEMO CIRCUIT 2088A 1 DATE: Monday, May 20, 2013 SHEET 1 OF 2 5 4 3 2 1 dc2088af SCHEMATIC DIAGRAM Downloaded from Arrow.com. 5 4 3 2 1 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. DEMO MANUAL DC2088A ALERTB SCL SDA D 3V3 J6 1 AUXP 2 SDA 3 GND 4 SCL LGKPWR 5 6 ALERTB 7 GPIO_1 8 OUTEN_0 9 OUTEN_1 10 GND 11 AUXSCL 12 AUXSDA TO DC1613A C C41 100nF U4 1 A0 8 AUXVCC VCC 2 A1 7 WP 3 A2 SCL 6 EESCL 4 5 VSS SDA EESDA 24LC025-I/ST R45 R46 4.99K 4.99K DYNAMIC LOAD CIRCUIT 5 E11 PULSE IN Q2 RJK0305DPB 4 DO NOT EXCEED 5% DUTY CYCLE! R38 E12 10K GND 1 2 3 R41 0.01 2512 VOUT C38 2.2uF 0805 2 3 4 VOUT J5 1 VOUT 5 1 C39 1uF 0805 2 3 4 5 J7 IOUT TST NOTE: PULSE OUT 10mV / AMP 2 Q3 3V3 TP0101K VDD33 3 2 1 VIN R39 10K +5V +5V D 2 R37 200 GPIO0B D1 GREEN ALERTB 1 TP0101K Q4 3 3 R40 15.8K GPIO0B 1 Q5 2N7002A ALERT D2 RED R42 127 VIN R43 100K 1 JP1 EXT ON 2 DRIVER OFF 3 2 1 D3 E15 C55 VDR 0.1uF E16 GND VIN VIN VDR C40 1uF U5 LT3029IMSE COUT2 10uF 1206 CBYP1 0.01uF 15 SHDN1 4 VOUT1 3 VOUT1 1 BYP1 R49 6.19K R52 2K 16 ADJ1 14 VIN1 13 VIN1 12 VIN2 11 VIN2 10 SHDN2 VOUT2 7 6 VOUT2 8 BYP2 CBYP2 0.01uF VIN R44 100K +5V 1 JP2 LED ON 2 OFF 3 COUT1 10uF 1206 ADJ2 9 R50 3.4K R53 2K 2 NC 5 GND 17 GND C GPIO0B RUN R47 OPT VDD33 R48 10K SW RUN ON 1 R51 2 10 OFF 3 C42 10nF B RIGHT ANGLE J8 HEADER RIGHT ANGLE J9 SOCKET 1 GND 2 SCL 3 SDA GPIO 4 5 RUN 6 SHARE_CLK 7 SYNC DNI 8 9 DNI 10 DNI R54 0 R55 0 R56 0 R57 0 R58 0 R59 0 R60 0 1 GND 2 SCL 3 SDA 4 GPIO 5 RUN 6 SHARE_CLK 7 SYNC 8 DNI 9 DNI 10 DNI A MILL MAXX 802-40-008-20-001000 SCL SDA GPIO0B RUN SHARE_CLK SYNC MILL MAXX 803-43-008-20-001000 5 4 B CUSTOMER NOTICE 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. APPROVALS PCB DES. HZ APP ENG. YI S. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE TECHNOLOGY TITLE: SCHEMATIC 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com A Fax: (408)434-0507 LTC Confidential-For Customer Use Only HIGH DENSITY DC / DC CONVERTER WITH POWER SYSTEM MANAGEMENT SIZE IC NO. LTC3880EUJ REV. N/A DEMO CIRCUIT 2088A 1 DATE: Monday, May 20, 2013 SHEET 2 OF 2 3 2 1 dc2088af 11 DEMO MANUAL DC2088A 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 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com Downloaded from Arrow.com. dc2088af LT 0114 · PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2014