DEMO MANUAL DC2089A-A/DC2089A-B LTC3880EUJ LTC3870EUFD Poly-Phase Step-Down DC/DC Controller with Power System Management Description Demonstration circuit 2089A is a high current, high efficiency, poly-phase synchronous buck converter featuring the LTC®3880EUJ, a dual-phase current mode controller, and the LTC3870EUFD, a dual-phase slave controller. The LTC3880 has the PMBus interface and power system management functions. The DC2089A uses discrete MOSFETs as the power stage. The input range of this board is from 7V to 14V, and the output voltage can be programmed from 0.8V to 1.8V. The output current is up to 80A for 4-phase operation. The DC2089A has two versions, the DC2089A-A uses a current sense resistor, while the DC2089A–B has DCR current sensing. The factory default setting for the output voltage is 1.0V. The DC2089A also has an on-board dynamic load circuit, which makes it easy for the customer to evaluate the transient performances. The DC2089A powers up to default settings and produces power based on configuration resistors or NVM without the need for any serial bus communication. This allows Performance Summary SYMBOL PARAMETER 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: 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/DC2089A 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. Specifications are at TA = 25°C CONDITIONS MIN TYP MAX UNITS 7 12 14 V 0.8 1.0 1.8 V 80 A DC2089A-A Assembly (RSENSE Current Sense) VIN Input Supply Range VOUT0 Output Voltage Range IOUT0 Output Current Range FSW Factory Default Switching EFF Peak Efficiency IOUT = 0A TO 80A, VIN = 7.0V to 14V 0 VOUT = 1.0V, See Figure 4. 350 kHz 88.8 % DC2089A-B Assembly (DCR Current Sense) VIN Input Supply Range VOUT0 Output Voltage Range IOUT0 Output Current Range FSW Factory Default Switching EFF Peak Efficiency IOUT = 0A TO 80A, VIN = 7.0V to 14V 7 12 14 V 0.8 1.0 1.8 V 80 A 0 VOUT = 1.0V, See Figure 5. 350 kHz 88.2 % dc2089af 1 DEMO MANUAL DC2089A-A/DC2089A-B Quick Start Procedure Demonstration circuit 2089A makes it easy to set up to evaluate the performances of the LTC3880 and the slave controller LTC3870. 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 C28. See Figure 3 for proper scope probe technique. 1. Make sure jumpers are in the following positions: JUMPER POSITION FUNCTION JP1 JP3 JP4 JP5 OFF C C EXT Power supply for pulse generator GPIO0B to GPIO1B RUN0 to Run1 External/Internal pulse for load transient circuit 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 16V. 5. Turn on both RUN switches as desired. 6. Check for the correct output voltage from E5 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 voltage from the GUI. See “LTpowerPlay QUICK START” session for details. 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, 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. Figure 1. Demo Setup with PC 2 dc2089af DEMO MANUAL DC2089A-A/DC2089A-B Quick Start Procedure + VIN – + IIN – – LOAD + SHUNT POWER SUPPLY + – Figure 2. Power Test Setup dc2089af 3 DEMO MANUAL DC2089A-A/DC2089A-B Quick Start Procedure Measuring Efficiency Measuring Output Ripple Voltage To accurately measure efficiency of any configuration, do the following: An accurate ripple measurement may be performed by using the below configuration across C28. nn nn Set JP1 to OFF position to disable the auxiliary circuits. Measure VIN across the input ceramic capacitor (C25). Measure VOUT across the output ceramic capacitor (C28). + – COUT VOUT GND Figure 3. Measuring Output Voltage Ripple 92 90 90 88 86 EFFICIENCY (%) EFFICIENCY (%) 88 86 84 DC2089A-A 12VIN 1.0VOUT DC2089A-A 12VIN 1.2VOUT 82 DC2089A-B 12VIN 1.0VOUT DC2089A-B 12VIN 1.2VOUT 78 78 0 10 20 30 50 40 60 LOAD CURRENT (A) 70 80 90 DC2089A F04 Figure 4. Typical Efficiency Curves DC2089A-A, FSW = 350kHz 4 82 80 80 76 84 76 0 10 20 30 50 40 60 LOAD CURRENT (A) 70 80 90 DC2089A F05 Figure 5. Typical Efficiency Curves DC2089A-B, FSW = 350kHz dc2089af DEMO MANUAL DC2089A-A/DC2089A-B 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 DC2089A 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 6. LTpowerPlay Main Interface dc2089af 5 DEMO MANUAL DC2089A-A/DC2089A-B 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://www.linear.com/ltpowerplay c. In the Toolbar, click the “R” (RAM to PC) icon to read the RAM from the LTC3880. This reads the configuration from the RAM of LTC3880 and loads it into the GUI. 2. Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC2089A. 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 LTC3880 is communicating: 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: Then, click the “W” (PC to RAM) icon to write these register values to the LTC3880. After finishing this step, you will see the output voltage will change to 1.5V. 6 dc2089af DEMO MANUAL DC2089A-A/DC2089A-B LTpowerPlay Quick Start Procedure If the write is successful, you will see the following message: 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 DC2089A-A Required Circuit Components 1 2 C1, C2 CAP., OS-CON, 330µF, 16V, 20%, F12 SANYO, 16SVP330M 2 8 C3, C4, C24, C25, C40, C41, C58, C59 CAP., X5R, 10µF, 16V, 10%, 1210 TAIYO YUDEN EMK325BJ106KN 3 6 C5, C18, C26, C42, C53, C57, C70 CAP., X5R, 100nF, 25V, 10%, 0603 AVX 06033C104KAT2A 4 3 C6, C39, C43 CAP., X5R, 4.7µF, 16V, 10%, 0603 TDK C1608X5R1C475K AVX 06033D105KAT2A 5 2 C7, C8 CAP., X5R, 1µF, 25V, 10%, 6 14 C9, C10, C15, C16, C28, C29, C44, C45, C46, C49, C60, C61, C62, C65 CAP., X5R, 100µF, 6.3V, 10%,1210 0603 AVX 12106D107AT2A 7 12 C11, C12, C30, C31, C32, C33, C34, C35, C47, C48, C63, C64 CAP, POSCAP 330µF 4V D3L SANYO, 4TPF330ML 8 2 C22, C23 CAP., X7R, 100pF, 25V, 10%, 0603 AVX 06033C101KAT2A 9 2 C27, C36 CAP., X5R, 10nF, 16V, 10%, 0603 AVX 0603YC103KAT2A AVX 06035A470JAT2A 10 2 C54, C56 CAP., NP0, 47pF, 50V, 5%, 11 4 C19, C38, C55, C68 CAP., X5R 1000pF, 50V 5% 0603 0603 AVX, 06035C102JAT2A 12 1 C21 CAP., X5R, 1500pF, 25V, 10%, 0603 NIC NMC0603X7R152K50TRPF 13 4 L1, L2, L3, L4 INDUCTOR, POWER, 0.25µH WURTH ELEC., 744301025 14 4 D1, D2, D3, D4 DIODE, SCHOTTKY, SOD-323 CENTRAL CMDSH-3TR 15 4 Q1, Q6, Q12, Q15 XSTR, POWER MOSFET LFPAK 16 4 Q3, Q9, Q13, Q18 XSTR, POWER MOSFET LFPAK 17 2 Q7, Q10 TRANS GP SS PNP 40V SOT-23 ON SEMI, MMBT3906LT1G INFINEON BSC050NE3LS G INFINEON BSC010NE2LSI 18 2 R1, R40 RES., CHIP, 2Ω, 1%, 0603 YAGEO, RC0603FR-072RL 19 8 R2, R3, R4, R5, R20, R27, R31, R122, R123 RES., CHIP, 10k, 1% 0603 NIC NRC06F1002TRF 20 33 R8, R17, R18, R24, R26, R37, R39, R41, R42, R45, R46, R47, R48, R49, R50, R52, R56, R57, R60, R62, R85, R124–R127, R74, R105, R109, R115, R103, R108, R112, R118 RES., CHIP, 0Ω, 1% 0603 VISHAY, CRCW06030000Z0EA 21 4 R12, R13, R14, R15 RES SENSE., CHIP, 0, 1W2512 VISHAY WSL251200000ZEA9 22 1 R25 RES., CHIP, 7.32k, 1% 0603 NIC NRC06F7321TRF 23 1 R28 RES., CHIP, 16.2k, 1% 0603 NIC NRC06F1622TRF 24 1 R29 RES., CHIP, 17.4k, 1% 0603 NIC NRC06F1742TRF dc2089af 7 DEMO MANUAL DC2089A-A/DC2089A-B Parts List ITEM QTY REFERENCE PART DESCRIPTION 25 2 R33, R35 RES., CHIP, 5.76k, 1%, 0603 NIC NRC06F5761TRF MANUFACTURER/PART NUMBER 26 1 R51 RES., CHIP, 90.9k, 1% 0603 NIC NRC06F9092TRF 27 1 R3 RES., CHIP, 4.99k, 1% 0603 VISHAY CRCW06034K99FKEA 28 1 R16 RES., CHIP, 3.48k, 1%, 0603 NIC NRC06F3481TRF 29 8 R65, R66, R68, R104, R102, R107, R111, R117 RES., CHIP, 100 , 1% 0603 VISHAY, CRCW0603100RFKEA 30 4 R75, R106, R110, R116, RES SENSE, 0.001 2512 VISHAY WSL25121L000FEA 31 1 U1 IC, LTC3880EUJ, QFN40P 6mm x 6mm LTC., LTC3880EUJ 32 1 U2 IC, LTC3870EUF, QFN28P 4mm x 5mm LTC., LTC3870EUFD DC2089A-A Additional Circuit Components 1 1 C70 CAP., X5R, 100nF,25V, 10% 0603 AVX 06033C104KAT2A 2 1 C73 CAP., X5R, 4.7µF,16V, 10% 0603 TDK C1608X5R1C475K 3 0 C13, C14, C50, C51, C66, C67 CAP, POSCAP OPT 4 0 C20 CAP, OPT,0603 5 2 C71, C72 CAP., X5R, 10nF,16V, 10% 0603 6 3 C74, C78, C79 CAP., X5R, 1µF, 16V, 10% 1206 7 2 C77, C82 CAP., X5R, 2.2µF,50V, 10% 0805 MURATA GRM21BR61H225KA73L 8 1 C80 CAP., NPO, 150pF, 6.3V0603 AVX 06036A151JAT2A 9 1 C81 CAP., X7R, 1µF, 16V, 10% MURATA GRM21BR71C105KA01L 10 1 D5 LED RED S-GW TYPE SMD 11 2 D6, D7 LED GREEN S-GW TYPE SMD ROHM SML-010FTT86L 12 0 D8, D9 LED OPT SOD-323 OPT 13 0 Q2, Q4, Q5, Q8, Q11, Q14, Q16, Q17 XSTR, OPT 14 2 Q19, Q20 MOSFET P-CH 20V 0.58A SOT-23 VISHAY TP0101K-T1-E3 15 2 Q21, Q22 MOSFET N-CH 60V 115MA SOT-23 FAIRCHILD 2N7002A 16 1 Q23 MOSFET SPEED SRS 30V 30ALFPAK RENESAS, RJK0305DPB-00#J0 17 1 R88 RES., CHIP, 2Ω, 1% 0603 YAGEO, RC0603FR-072RL 18 2 R71, R93 RES., CHIP, 10k, 1% 0603 NIC NRC06F1002TRF 19 3 R64, R67, R70 RES., CHIP, 0Ω, 1% 0603 20 0 R9, R11, R19, R30, R36, R38, R55, R58, R59, RES., OPT0603 R61, R63, R69, R80, R81, R100, R101, R113, R114, R119, R120, R122, R6, R21, R43, R53, R7, R22, R44, R54 21 1 R72 RES., CHIP, 127Ω, 1% 0603 NIC NRC06F1270TRF 22 1 R73 RES., CHIP, 15.8k, 1% 0603 NIC NRC06F1582TRF 23 3 R76, R77, R96 RES., CHIP, 10Ω, 1% 0603 NIC NRC06F10R0TRF 24 2 R78, R79 RES., CHIP, 200Ω, 1% 0603 NIC NRC06F2000TRF 25 2 R82, R83 RES., CHIP, 4.99k, 1% 0603 VISHAY CRCW06034K99FKEA 26 1 R84 RES., CHIP, 100k, 1% 0603 27 1 R86 RES., CHIP, 0.001Ω, 1%, 1W2010 NIC NCSR150FR001DTR 28 0 R87 RES., CHIP, OPT2010 OPT 29 2 R89, R95 RES., CHIP, 20k, 1% 0603 NIC NRC06F2002TRF 30 1 R90 RES., CHIP, 154k, 1% 0603 NIC NRC06F1543TRF 8 D3L 0805 AVX 0603YC103KAT2A AVX 1206YD105KAT2A ROHM SML-0110VTT86 LFPAK OPT VISHAY, CRCW06030000Z0EA OPT NIC NRC06F1003TRF dc2089af DEMO MANUAL DC2089A-A/DC2089A-B Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 31 1 R91 RES., CHIP, 1M, 5% 0603 VISHAY CRCW06031M00JNEA 32 1 R92 RES., CHIP, 3.3Ω, 1% 0603 VISHAY CRCW06033R30FKEA 33 1 R94 RES., CHIP, 82.5Ω, 5% 0603 VISHAY CRCW060382R5FKEA 34 1 R97 RES., CHIP, 681k, 1% 0603 VISHAY CRCW0603681KFEA 2010 VISHAY, WSL2010R010FEA 35 1 R98 RES, VARIABLE 5k 36 1 R99 RES., CHIP, 0.01, 1% BOURNS 3386P-1-502-LF 37 1 U1 IC, LTC3880EUJ, QFN40P 6mm x 6mm LTC., LTC3880EUJ 38 1 U2 IC, LTC3870EUF, QFN28P 4mm x 5mm LTC., LTC3870EUFD 39 1 U3 IC, 24LC05-I/ST MICROCHIP 24LC025-I/ST 40 1 U4 IC, LT1129CS8-5, SO8NB 41 1 U5 IC, LTC6992-1 S6-TSOT23 LINEAR TECHNOLOGY. LTC6992IS6-1 42 1 U6 IC, LT1803-5 S5-TSOT23 LINEAR TECHNOLOGY. LT1803IS5 43 0 C17, C37, C52, C69 CAP., OPT0603 OPT TSSOP-8_4.4mm LINEAR TECHNOLOGY, LT1129CS8-5 DC2089A-A Hardware 1 21 E1–E21 TURRET, .062" MILL-MAX, 2308-2-00-80-00-00-07-0 2 4 JP1, JP3, JP4, JP5 HEADER, 1X3 2mm SAMTEC TMM-103-02-L-S 3 4 XJP1, XJP3, XJP4, XJP5 SHUNT, 2mm SAMTEC 2SN-BK-G 4 6 J1–J6 STUD, TESTPIN PEM KFH-032-10 5 12 J1–J6 (X2) NUT, BRASS 10-32 ANY #10-32 6 6 J1–J6 RING, LUG #10 KEYSTONE #10 7 6 J1–J6 WASHER, TIN PLATED BRASS ANY #10 8 1 J7 HEADER, 2X7 2mm, RA (M) MOLEX, 87760-1416 9 1 J8 HEADER, 2X6 2mm STR DL PCB FCI 98414-G06-12ULF 10 1 J9 SOCKET, 2X7 2mm RA (F) SULLINS, NPPN072FJFN-RC 11 3 J10, J11, J12 CONN, BNC, 5PINS CONNEX, 112404 12 2 SW1, SW2 SWITCH, SUBMINATURE SLIDE C&K JS202011CQN DC2089A-B Required Circuit Components 1 2 C1, C2 CAP., OS-CON, 330µF, 16V, 20%, F12 SANYO, 16SVP330M 2 8 C3, C4, C24, C25, C40, C41, C58, C59 CAP., X5R, 10µF,16V, 10%, 1210 TAIYO YUDEN EMK325BJ106KN 3 6 C5, C18, C26, C42, C53, C57, C70 CAP., X5R, 100nF,25V, 10%, 0603 AVX 06033C104KAT2A 4 3 C6, C39, C43 CAP., X5R, 4.7µF, 16V, 10%, 0603 TDK C1608X5R1C475K 5 2 C7, C8 CAP., X5R, 1µF, 25V, 10%, 0603 AVX 06033D105KAT2A 6 14 C9, C10, C15, C16, C28, C29, C44, C45, C46, C49, C60, C61, C62, C65 CAP., X5R, 100µF, 6.3V, 10%,1210 AVX 12106D107AT2A 7 12 C11, C12, C30, C31, C32, C33, C34, C35, C47, C48, C63, C64 CAP, POSCAP 330µF 4V D3L SANYO, 4TPF330ML 8 2 C22, C23 CAP., X7R, 100pF, 25V, 10%, 0603 AVX 06033C101KAT2A 9 2 C27, C36 CAP., X5R, 10nF,16V, 10%, 0603 AVX 0603YC103KAT2A 10 2 C54, C56 CAP., NP0, 47pF, 50V, 5% 0603 AVX 06035A470JAT2A 11 4 C19, C38, C55, C68 CAP., X5R 0.22µF 25V 10% 0603 AVX 06033D224KAT2A 12 1 C21 CAP., X5R, 2200pF,25V, 10% 0603 NIC NMC0603X7R222K50TRPF 13 4 C17, C37, C52, C69 CAP., X5R 1µF 25V 10% MURATA GRM188R61E105KA12D 0603 dc2089af 9 DEMO MANUAL DC2089A-A/DC2089A-B Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 14 4 L1, L2, L3, L4 INDUCTOR, SMT POWER 0.22µH VISHAY, IHLP5050FD-01-022 15 4 D1, D2, D3, D4 DIODE, SCHOTTKY, SOD-323 CENTRAL CMDSH-3TR 16 4 Q1, Q6, Q12, Q15 XSTR, POWER MOSFET LFPAK 17 4 Q3, Q9, Q13, Q18 XSTR, POWER MOSFET LFPAK 18 2 Q7, Q10 TRANS GP SS PNP 40V SOT-23 ON SEMI, MMBT3906LT1G 19 2 R1, R40 RES., CHIP, 2Ω, 1%, 0603 YAGEO, RC0603FR-072RL 20 8 R2, R3, R4, R5, R20, R27, R31, R122, R123 RES., CHIP, 10k, 1% 0603 NIC NRC06F1002TRF 21 33 R8, R17, R18, R24, R26, R37, R39, R41, R42, RES., CHIP, 0Ω, 1% R45, R46, R47, R48, R49, R50, R52, R56, R57, R60, R62, R85, R124–R127, R7, R22, R44, R54, R65, R66, R68, R104 0603 VISHAY, CRCW06030000Z0EA 22 4 R12, R13, R14, R15 RES SENSE., CHIP, 0Ω, 1W2512 VISHAY WSL251200000ZEA9 23 1 R25 RES., CHIP, 7.32k, 1% 0603 NIC NRC06F7321TRF 24 1 R28 RES., CHIP, 16.2k, 1% 0603 NIC NRC06F1622TRF 25 1 R29 RES., CHIP, 17.4k, 1% 0603 NIC NRC06F1742TRF 26 2 R33, R35 RES., CHIP, 5.76k, 1%, 0603 NIC NRC06F5761TRF 27 1 R51 RES., CHIP, 90.9k, 1% 0603 NIC NRC06F9092TRF 28 1 R3 RES., CHIP, 4.99k, 1% 0603 VISHAY CRCW06034K99FKEA INFINEON BSC050NE3LS G INFINEON BSC010NE2LSI 29 8 R6, R21, R43, R53, R102, R107, R111, R117 RES., CHIP, 1.4k, 1% 0603 VISHAY CRCW06031K40FKEA 30 1 R16 RES., CHIP, 3.01k, 1% 0603 NIC NRC06F3011TRF 31 4 R75, R106, R110, R116, RES SENSE., CHIP, 0Ω, 1W2512 VISHAY WSL251200000ZEA9 32 1 U1 IC, LTC3880EUJ, QFN40P 6mm x 6mm LTC., LTC3880EUJ 33 1 U2 IC, LTC3870EUF, QFN28P 4mm x 5mm LTC., LTC3870EUFD DC2089A-B Additional Circuit Components 1 1 C70 CAP., X5R, 100nF,25V, 10% 0603 AVX 06033C104KAT2A 2 1 C73 CAP., X5R, 4.7µF,16V, 10% 0603 TDK C1608X5R1C475K 3 0 C13, C14, C50, C51, C66, C67 CAP, POSCAP OPT 4 0 C20 CAP, OPT0603 D3L 5 2 C71, C72 CAP., X5R, 10nF,16V, 10%, 0603 AVX 0603YC103KAT2A 6 3 C74, C78, C79 CAP., X5R, 1µF, 16V, 10%, 1206 AVX 1206YD105KAT2A 7 2 C77, C82 CAP., X5R, 2.2µF,50V, 10%, 0805 MURATA GRM21BR61H225KA73L 8 1 C80 CAP., NPO, 150pF, 6.3V0603 AVX 06036A151JAT2A 9 1 C81 CAP., X7R, 1µF, 16V, 10%, 0805 MURATA GRM21BR71C105KA01L 10 1 D5 LED RED S-GW TYPE SMD ROHM SML-0110VTT86 11 2 D6, D7 LED GREEN S-GW TYPE SMD ROHM SML-010FTT86L 12 0 D8, D9 LED OPT SOD-323 OPT 13 0 Q2, Q4, Q5, Q8, Q11, Q14, Q16, Q17 XSTR, OPT 14 2 Q19, Q20 MOSFET P-CH 20V 0.58A SOT-23 VISHAY TP0101K-T1-E3 LFPAK OPT 15 2 Q21, Q22 MOSFET N-CH 60V 115MA SOT-23 FAIRCHILD 2N7002A 16 1 Q23 MOSFET SPEED SRS 30V 30A LFPAK RENESAS, RJK0305DPB-00#J0 17 1 R88 RES., CHIP, 2Ω, 1% 0603 YAGEO, RC0603FR-072RL 18 2 R71, R93 RES., CHIP, 10k, 1% 0603 NIC NRC06F1002TRF 19 3 R64, R67, R70 RES., CHIP, 0Ω, 1% 0603 VISHAY, CRCW06030000Z0EA 10 dc2089af DEMO MANUAL DC2089A-A/DC2089A-B Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 20 0 R9, R11, R19, R30, R36, R38, R55, R58, R59, R61, R63, R69, R80, R81, R100, R101, R113, R114, R119, R120, R121, R74, R105, R109, R115, R103, R108, R112, R118 RES., OPT 0603 OPT 21 1 R72 RES., CHIP, 127, 1% 0603 NIC NRC06F1270TRF 22 1 R73 RES., CHIP, 15.8k, 1% 0603 NIC NRC06F1582TRF 23 3 R76, R77, R96 RES., CHIP, 10, 1% 0603 NIC NRC06F10R0TRF 24 2 R78, R79 RES., CHIP, 200, 1% 0603 NIC NRC06F2000TRF 25 2 R82, R83 RES., CHIP, 4.99k, 1% 0603 VISHAY CRCW06034K99FKEA 26 1 R84 RES., CHIP, 100k, 1% 0603 NIC NRC06F1003TRF 27 1 R86 RES., CHIP, 0.001, 1%, 1W2010 NIC NCSR150FR001DTR 28 0 R87 RES., CHIP, OPT2010 OPT 29 2 R89, R95 RES., CHIP, 20k, 1% 0603 NIC NRC06F2002TRF 30 1 R90 RES., CHIP, 154k, 1% 0603 NIC NRC06F1543TRF 31 1 R91 RES., CHIP, 1M, 5% 0603 VISHAY CRCW06031M00JNEA 32 1 R92 RES., CHIP, 3.3, 1% 0603 VISHAY CRCW06033R30FKEA 33 1 R94 RES., CHIP, 82.5, 5% 0603 VISHAY CRCW060382R5FKEA 34 1 R97 RES., CHIP, 681k, 1% 0603 VISHAY CRCW0603681KFEA 2010 VISHAY, WSL2010R010FEA 35 1 R98 RES, VARIABLE 5k 36 1 R99 RES., CHIP, 0.01, 1% BOURNS 3386P-1-502-LF 37 1 U1 IC, LTC3880EUJ, QFN40P 6mm x 6mm 38 1 U2 IC, LTC3870EUF, QFN28P 4mm x 5mm LTC., LTC3870EUFD 39 1 U3 IC, 24LC05-I/ST MICROCHIP 24LC025-I/ST 40 1 U4 IC, LT1129CS8-5 SO8NB 41 1 U5 IC, LTC6992-1 S6-TSOT23 LINEAR TECHNOLOGY. LTC6992IS6-1 42 1 U6 IC, LT1803-5 S5-TSOT23 LINEAR TECHNOLOGY. LT1803IS5 TSSOP-8_4.4mm LTC., LTC3880EUJ LINEAR TECHNOLOGY, LT1129CS8-5 DC2089A-B Hardware 1 21 E1–E21 TURRET, .062" MILL-MAX, 2308-2-00-80-00-00-07-0 2 4 JP1, JP3, JP4, JP5 HEADER, 1X3 2mm SAMTEC TMM-103-02-L-S 3 4 XJP1, XJP3, XJP4, XJP5 SHUNT, 2mm SAMTEC 2SN-BK-G 4 6 J1–J6 STUD, TESTPIN PEM KFH-032-10 5 12 J1–J6 (X2) NUT, BRASS 10-32 ANY #10-32 6 6 J1–J6 RING, LUG #10 KEYSTONE #10 7 6 J1–J6 WASHER, TIN PLATED BRASS ANY #10 8 1 J7 HEADER 2X7 2mm, RA (M) MOLEX, 87760-1416 9 1 J8 HEADER, 2X6 2mm STR DL PCB FCI 98414-G06-12ULF 10 1 J9 SOCKET 2X7 2mm RA (F) SULLINS, NPPN072FJFN-RC 11 3 J10, J11, J12 CONN, BNC, 5PINS CONNEX, 112404 12 2 SW1, SW2 SWITCH, SUBMINATURE SLIDE C&K JS202011CQN dc2089af 11 A B C D SYNC SDA SCL E2 J2 J1 E1 Q7 Q10 R10 0 VIN 0 OPT 0 R39 OPT R38 R37 5.76K 24.9K R36 R35 5.76K 24.9K R34 R33 17.4K 16.2K R32 R29 R28 VOUT1_TRIM VOUT0_TRIM VOUT1_CFG VOUT0_CFG FREQ_CFG 9 17 16 24 23 14 15 40 28 5 26 11 8 10 R5 10K FREQ_CFG ASEL SC WP RUN0 RUN1 TSNS0 TSNS1 ITH0 ITH1 ALERT SYNC SDA SCL C5 100nF 5 1. ALL RESISTORS AND CAPACITORS ARE 0603. NOTE: UNLESS OTHERWISE SPECIFIED VDD25 VDD25 VDD25 VDD25 VDD25 R25 7.32K R23 24.9K VDD25 WP RUN0 RUN1 ITH0 VDD33 R20 10K SC * * R16 C21 2 R1 R3 R4 4.99k 10K C2 330uF 16V SVP R2 10K R19 OPT C23 100pF R18 0 + VDD33 + C1 330uF 16V SVP ADDRESS: 0x45h C36 10nF C27 10nF C20 OPT R11 OPT MMBT3906LT1G TSNS0 MMBT3906LT1G TSNS1 C22 100pF ALERTB GND GND VIN 7V-14V VIN VOUT0_CFG 18 33 VDD25 4 VDD33 4 * VSENSE0- VSENSE0+ ISNS0- ISNS0+ BG0 SW0 BOOST0 TG0 VSENSE1 ISNS1- ISNS1+ BG1 SW1 GPIO1B 2 INTVCC CMDSH-3-TR C26 100nF D2 C18 100nF INTVCC 1uF 1.4K OPT 3 4 4 4 4 3 4 4 Q3 SW1 Q1 * Q6 BSC050NE3LS C17 * R102 * R65 BSC010NE2LSI C19 * 4 4 BSC050NE3LS Q9 * C37 R117 R104 * * * BSC010NE2LSI C38 * C25 10uF 1210 * R6 L1 C3 10uF 1210 L2 * C24 10uF 1210 R21 * VIN * R7 C4 10uF 1210 0 1W 0.001 1W 100 1.4K 100 0 CUSTOMER NOTICE OPT 0 OPT 0 R16 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. L1-L4 C10 YI S. LT C29 R13 0 330uF D3L + C11 2 R15 0 330uF D3L + C34 0 R85 OPT R9 TECHNOLOGY 0 R26 INTVCC VSNS0- GND VOUT1 MAX 3.3V MAX 20A E8 E7 E6 GND INTVCC VOUT0- VOUT0+ GND MAX 3.3V MAX 60A VOUT0 VOUT1- VOUT1+ E5 J6 VSNS0+ 330uF D3L + C31 J5 E4 DATE 07-16-14 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only OPT 330uF D3L + C30 J4 E3 J3 VSNS1 VOUT0 100uF 1210 C16 VOUT1 YI S. APPROVED VSNS0+ 330uF D3L R24 0 C15 100uF 1210 + C35 R30 OPT D3L + C14 EXTVCC 330uF D3L + C33 VOUT0 330uF D3L 1 DATE: N/A SIZE 1 SHEET 1 LTC3880EUJ + LTC3870IUFD DEMO CIRCUIT 2089A Wednesday, July 16, 2014 IC NO. OF 4 2 REV. POLY-PHASE DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT TITLE: SCHEMATIC OPT D3L + C13 PRODUCTION DESCRIPTION REVISION HISTORY VOUT1 + C32 R14 0 330uF D3L + C12 REV 100uF 100uF 1210 1210 C28 R12 0 100uF 1210 __ ECO 0.22uH IHLP5050FD-01-022 SCALE = NONE 2 * R118 WE 744301025 R115 * * 2512 R116 C9 100uF 1210 APPROVALS 3.01K 3.48K 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. 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 ASSISTANCE. 0 OPT * R22 * R103 R74 * * 2512 R75 R7,R22 R74,R105 R75,R106 R65,R66 R102,R107 R103,R108 R44,R54 R109,R115 R110,R116 R68,R104 R111,R117 R112,R118 Q8 OPT Q5 OPT Q4 OPT Q2 OPT VIN 2 Figure 7. DC2089A Demo Circuit Schematic, Sheet 1 of 4 0.22uF 2200pF "B" VERSION DCR SENSE OPT C19,C38 C17,C37 R6,R21 C55,C68 C52,C69 R43,R53 1 1000pF C21 VDD33 0 R17 R125 0 0 R8 2 CMDSH-3-TR 1500pF 10K R31 10K R27 2 1 7 6 36 39 37 38 27 4 3 32 29 31 30 R124 0 1 D1 "A" VERSION R SENSE CONFIGURATION SGND AND PGND CONNECTED AT A SINGLE NODE NEAR U1 TG1 C8 1uF BOOST1 GPIO0B C7 1uF U1 LTC3880EUJ INTVCC C6 4.7uF VOUT1_CFG 19 VTRIM0_CFG 20 35 VIN VTRIM1_CFG 21 INTVCC 25 VDD33 22 VDD25 GND 41 PGND 34 GPIO0 12 GPIO1 13 5 1 2 3 5 1 2 3 5 1 2 3 5 1 2 3 5 1 2 3 5 1 2 3 5 1 2 3 5 12 1 2 3 5 A B C D DEMO MANUAL DC2089A-A/DC2089A-B Schematic Diagram dc2089af 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 MODE1 MODE0 SYNC E19 E10 E18 E17 ITH0 RUN0 ITH0 GPIO0B GPIO0B RUN0 GND E9 5 MODE1 MODE0 PHASMD ILIM EXTVCC 0 OPT 0 OPT R61 OPT R101 OPT 0 R62 R59 R60 OPT R100 R57 R58 OPT 12 11 27 10 9 25 8 5 28 26 1 4 0 C56 47pF C54 47pF 2 R55 0 R52 0 R48 0 R45 VIN R40 R56 0 R49 0 R47 0 R46 0 R41 90.9K R51 PHASMD ILIM GPIO0B MODE1 MODE0 C39 4.7uF PHASMD SYNC FREQ ILIM ITH1 FAULT1 MODE1 RUN1 ITH0 FAULT0 MODE0 RUN0 C42 100nF 20 INTVCC_2 INTVCC_2 INTVCC_2 INTVCC_2 4 ISENSE1- ISENSE1+ BG1 SW1 BOOST1 TG1 ISENSE0- ISENSE0+ BG0 SW0 BOOST0 TG0 GPIO1B 6 7 16 14 15 13 3 2 21 23 22 24 C43 4.7uF INTVCC_2 4 U2 LTC3870EUFD VIN 18 EXTVCC 17 INTVCC EXTVCC GND 29 PGND 19 1 1 2 2 100nF CMDSH-3-TR C57 D4 100nF C53 CMDSH-3-TR D3 INTVCC_2 INTVCC_2 3 Q17 OPT Q16 OPT Q14 OPT Q13 * * Q15 BSC050NE3LS C52 * R66 R107 Q18 * C68 * C69 * * R111 R68 BSC010NE2LSI 4 4 * C55 BSC010NE2LSI 4 4 Q12 BSC050NE3LS * L4 R53 * * * C58 10uF 1210 R43 L3 C40 10uF 1210 * R54 C59 10uF 1210 * R44 C41 10uF 1210 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. * * R109 2512 R110 * R105 * 2512 R106 2 SCALE = NONE YI S. LT APPROVALS VIN VIN 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. 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 ASSISTANCE. CUSTOMER NOTICE 4 4 4 4 Q11 OPT 2 Figure 8. DC2089A Demo Circuit Schematic, Sheet 2 of 4 0 R50 R127 0 0 R42 R126 0 3 5 1 2 3 5 1 2 3 5 1 2 3 5 1 2 3 5 1 2 3 5 1 2 3 5 1 2 3 5 1 2 3 5 C61 100uF 1210 C60 100uF 1210 330uF D3L + C64 330uF D3L + C48 TECHNOLOGY 330uF D3L + C63 330uF D3L + C47 OPT D3L + C67 OPT D3L + C51 C46 100uF 1210 C62 C49 100uF 1210 100uF 1210 C65 VOUT0 100uF 1210 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only OPT D3L + C66 OPT D3L + C50 VOUT0 DATE: N/A SIZE 1 LTC3880EUJ + LTC3870IUFD DEMO CIRCUIT 2089A Wednesday, July 16, 2014 IC NO. SHEET 2 OF 4 2 REV. POLY-PHASE DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT TITLE: SCHEMATIC * R112 * R108 C45 100uF 1210 C44 100uF 1210 1 A B C D DEMO MANUAL DC2089A-A/DC2089A-B Schematic Diagram dc2089af 13 A B C ALERTB RUN0 GPIO0B 1 1 R72 127 5 D5 ALERT RED TP0101K Q20 C NC RUN0-RUN1 3V3 3 1 C NC GPIO0-GPIO1 JP4 3 SDA SCL WP VCC U3 24LC025-I/ST VSS A2 A1 A0 JP3 4 3 2 1 AUXP SDA GND SCL LGKPWR ALERTB GPIO_1 OUTEN_0 OUTEN_1 GND AUXSCL AUXSDA J8 TO DC1613A GND E21 2 2 100nF C70 3V3 EESCL EESDA 6 5 VIN 3V3 RUN1 GPIO1B EEWP 7 8 AUXVCC 1 2 3 4 5 6 7 8 9 10 11 12 3 10K R71 TP0101K Q19 R73 15.8K 2 VDD33 R82 4.99K GPIO1B R83 4.99K 3V3 ALERTB 1 3 2 4 Q21 2N7002A D6 GPIO1B GRN R78 200 E11 ALERTB FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V J7 SCL E12 GPIO0B OPT R119 OPT R80 3V3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 E13 Q22 2N7002A D7 GPIO0B GRN R79 200 SCL SHARE_CLK VIN 3V3 3 R114 OPT 1206 R120 OPT SYNC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 J9 VIN OFF ON JP1 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. OFF 5 ON R84 100K 2 SCALE = NONE YI S. LT APPROVALS 2 R113 OPT SW2 RUN1 D9 OPT PULSE GENERATOR 0 R64 OPT R63 DEMO HEADER (F) FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V OPT R69 0 R67 CUSTOMER NOTICE R70 0 E14 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. 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 ASSISTANCE. R121 OPT SYNC SHARE_CLK E20 Figure 9. DC2089A Demo Circuit Schematic, Sheet 3 of 4 1 DEMO HEADER (M) SDA SDA ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN 4 4 1 6 3 D 1 2 3 2 1 2 1 3 2 2 1 3 2 3 1 8 7 6 5 VIN NC GND OUTPUT SENSE/ADJ U4 OFF 4 1 2 3 2 C71 10nF R76 10 R123 10K VDD33 +5V C73 4.7uF RUN1 RUN0 GPIO0B GPIO1B 1 DATE: N/A SIZE 1 SHEET 3 LTC3880EUJ + LTC3870IUFD DEMO CIRCUIT 2089A Wednesday, July 16, 2014 IC NO. OF 4 2 REV. POLY-PHASE DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only R122 10K VDD33 TECHNOLOGY LT1129CS8-5 GND GND SHDN C72 10nF 5 ON SW1 RUN0 TITLE: SCHEMATIC C74 1uF 2 R77 10 D8 OPT R81 OPT 4 1 14 6 3 5 A B C D DEMO MANUAL DC2089A-A/DC2089A-B Schematic Diagram dc2089af A B C 5 R95 20K 154K R90 3 2 1 DIV V+ OUT 70Hz, 3% Duty Cycle SET GND MOD LTC6992-1 4 5 6 R97 681K R91 1M 4 LOAD STEP C79 1uF 1206 +5V R98 5K R96 10 1% R89 20K 3 2 5 -IN VOUT U6 LT1803IS5 +IN V- V+ 4 1 3 1 3 INT EXT R93 10K 4 CUSTOMER NOTICE 82.5 R94 3.3 R92 R99 0.01 2010 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. VOUT1 VOUT0 2 SCALE = NONE YI S. LT APPROVALS RJK0305DPB Q23 OPT 2010 2010 R87 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. 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 ASSISTANCE. C80 150pF JP5 INT / EXT PULSE R88 2 R86 0.001 2 Figure 10. DC2089A Demo Circuit Schematic, Sheet 4 of 4 C78 1uF 1206 +5V DYNAMIC LOAD CIRCUIT FOR DEMO ONLY 2 3 5 1 2 3 U5 4 1 1 1 J10 J11 J12 E16 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 1 DATE: N/A SIZE 1 SHEET 4 LTC3880EUJ + LTC3870IUFD DEMO CIRCUIT 2089A Wednesday, July 16, 2014 IC NO. OF 4 2 REV. POLY-PHASE DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT TECHNOLOGY VOUT1 GND IOUT TST VOUT0 EXT PULSE TITLE: SCHEMATIC C82 2.2uF 0805 VOUT1 C81 1uF 0805 C77 2.2uF 0805 VOUT0 E15 2 3 4 5 2 3 4 5 2 3 4 5 D 5 A B C D DEMO MANUAL DC2089A-A/DC2089A-B Schematic Diagram 15 dc2089af DEMO MANUAL DC2089A-A/DC2089A-B 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 16 Linear Technology Corporation dc2089af LT 0714 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2014