DEMO MANUAL DC980A/DC980B Dual Power Supply Monitor and Margining Controller with LTC3828 Dual DC/DC Supply Description The DC980A and DC980B are a demonstration system that showcases the LTC2970, a dual power supply monitor and margining controller with an I2C interface. The DC980A board contains the LTC2970 device and the DC980B board contains the LTC3828 dual DC/DC controller. The two boards interface to each other via a 20-pin connector. The DC980B board features the LTC3828 dual output, 2-phase synchronous buck regulator. The LTC2970’s two voltage-buffered, 8-bit IDACs allow highly accurate margining of the LTC3828’s output voltages. The IDACs can be configured to automatically servo the power supplies to a desired voltage using the ADC for feedback. The DC980B comes preconfigured with 3.3V and 5V power supply rail voltages. The LTC2970’s low drift reference and 14-bit ∆∑ A/D converter allow precise measurements of two power supply output voltages and load currents. Fault management allows ALERTB to be asserted for configurable over- and undervoltage fault conditions. This demonstration system is supported by the LTpowerPlay™ graphical user interface (GUI) which enables complete control of all the features of the device. Together, the LTpowerPlay software and DC980A/DC980B hardware system create a powerful development environment for designing and testing hardware configurations for the LTC2970. The software displays the LTC2970 features and provides real time measurements from the device’s ADC and status registers. Telemetry also allows easy access of the fault status created by the LTC2970. The LTC2970 features may be evaluated with the LTC3828 based power supplies, or alternatively the DC980B board may be removed and DC980A can then be connected to an external power supply circuit. The DC980B demo board is powered by an external 8V to 15V power supply. To power the DC980A demo board, you have two choices. It may be powered from either the DC590 USB-to-I2C controller or from the DC980B board using an external jumper wire. Communication with the software is provided through the DC590 USB-to-I2C controller. The following is a checklist of items which can be obtained from the LTC website or LTC field sales. USB-to-I2C/Serial Controller (DC590) n LTpowerPlay Software n DC980A/DC980B Features n n n n n n n n n n n n Monitors and Margins Two Power Supplies Two Output Voltage Monitors Two Input Voltage Monitors Two Output Current Monitors Telemetry Reads Back VIN, VOUT, IOUT, Temperature Supported by LTpowerPlay GUI I2C Adjustable OV/UV Trip Points Margin or Trim Supplies to ±0.5% Accuracy I2C/SMBus Serial Interface Programmable GPIO for Fault Reporting Powered from External Power Supply LTC2970 Available in 24-Pin QFN Package Design files for this circuit board are available at http://www.linear.com/demo/DC980 L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. dc980abf 1 DEMO MANUAL DC980A/DC980B Performance Summary Specifications are at TA = 25°C Table 1. LTC2970 Performance Summary PARAMETER CONDITIONS VALUE 12VIN Supply Input Voltage Range 8V to 15V VDD Supply Input Voltage Range 4.5V to 5.75V ADC Full-Scale Accuracy ±0.4% VIN = 3V ADC Total Unadjusted Error ±0.5% ADC Input Range 0V to 6V ADC Resolution Resolution = 8.192V/16384 500µV/LSB ADC Conversion Rate 30Hz Margining DAC Resolution 8-Bits Temperature Sensor Resolution 0.25°C/LSB I2C Serial Clock Frequency 10kHz to 400kHz Table 2. Demo Board System Specifications NOMINAL UNTRIMMED VOUT TOP FEEDBACK RESISTOR BOTTOM FEEDBACK RESISTOR DAC RESISTOR IDAC RESISTOR MARGIN RANGE VOUT1 5V ±1.5% 105k 20k 147k 6.34k ±10% VOUT2 3.3V ±1.5% 95.3k 30.1k 196k 6.34k ±10% Notes: 1. Load current < 5A is recommended. 2. Output voltages can be margined by ±10% from nominal with the default resistor values. These values may be changed to create output voltages other than 5V and 3.3V. Use the Resistor Selection Tool which is accessed from LTpowerPlay. The LTC3828’s feedback node voltage is 0.8V. Glossary of Terms The following list contain terms used throughout the document. Rail: The final output voltage that the power supply controller manages. Channel: The collection of functions that monitor, supervise, and trim a given power supply rail. Supervise: The act of quickly responding (warning or faulting) to a voltage or current condition that is compared to preprogrammed values. Margin: Term used typically in board level testing that increases/decreases the output voltage to look for sensitivity/marginality problems. Trim: The act of adjusting the final output voltage. A servo loop is typically used to trim the voltage. Monitor: The act of measuring voltage, current, and temperature readings. dc980abf 2 DEMO MANUAL DC980A/DC980B LTpowerPlay GUI SOFTWARE LTpowerPlay is a powerful Windows-based tool that supports Linear Technology products, including the LTC2970 dual power supply monitor and margining controller. You can use LTpowerPlay to evaluate Linear Technology ICs by connecting to a demo board system. LTpowerPlay utilizes the DC590 USB I2C/serial controller to communicate with one of many potential targets, including the DC980A/B demo system or a customer board. The software also SYSTEM TREE OF ALL DEVICES CONFIGURATION SETTINGS FOR ALL DEVICES IN SYSTEM TREE 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 Power System Management Products visit Help, View Online help on the LTpowerPlay menu. REAL-TIME TELEMETRY DATA DISPLAY OF SELECTED PARAMETER (CONFIGURATION OR TELEMETRY) CHIP DASHBOARD SCOPE-LIKE TELEMETRY WINDOW Figure 1. Screenshot of LTpowerPlay GUI dc980abf 3 DEMO MANUAL DC980A/DC980B Quick Start Procedure The following procedure describes how to set up a DC980A, DC980B, and DC590 for demonstration purposes or to evaluate the performance of the LTC2970. 1.Download and install LTpowerPlay: http://www.linear.com/ltpowerplay 2.The default locations of DC980A’s configuration jumpers are as follows: JP1 ASEL0 JP2 ASEL1 JP3 GRIO_CFG JP4 WRITEPROTECT JP5 DAC1 TERMINATION JP6 DAC0 TERMINATION JP7 VDD SOURCE LO LO GND ON IOUT0 IOUT1 DC590 3.The default locations of DC980B’s configuration jumpers are as follows: JP1 PHSMD JP2 FSET JP3 FCB JP4 RUN1 JP5 RUN2 JP6 TRACK2 JP7 TRACK1 0 550kHz CCM ON ON EXT1 VOUT1 4.Connect the DC980A and DC980B boards using the 20-pin analog interface connector. Connect DC980A to the DC590 USB I2C/serial controller using the supplied 14-conductor ribbon cable. 5.Connect a power supply (8V to 15V) to the DC980B’s VIN and GND turrets. Refer to Figure 2 for the connections. NOTE: Make sure that the input voltage does not exceed 15V. Be sure JP7 on the DC980A board is set to DC590. Figure 2. Connecting DC980A/DC980B Boards and the DC590 I2C/Serial Controller dc980abf 4 DEMO MANUAL DC980A/DC980B Quick Start Procedure 6 .Connect the USB cable from the host computer to the DC590. Launch LTpowerPlay. The software automatically identifies the DC980A and builds a system tree for the LTC2970. The GUI should appear as that shown in Figure 1. a. Load default configuration into the LTC2970. From the pull-down menu select Demo > Demo Config. b.Check for the LTC3828 output voltages by clicking on CHO_A_ADC_LTC2970 or CH1_A_ADC_LTC2970. dc980abf 5 DEMO MANUAL DC980A/DC980B Quick Start Procedure c. Check VDD and V12 input voltages Note: If JP7 is set to DC590 position, the V12 telemetry reading will be ~5V. dc980abf 6 DEMO MANUAL DC980A/DC980B Alternate DC980A Powering Method The DC980A board may be powered from the input supply that powers the DC980B board. This configuration allows the LTC2970 to make a direct reading of VIN and display the readback value in the V12_ADC_LTC2970 register in LTpowerPlay. It requires an external jumper wire. Ensure that all power is removed from both boards. On the DC980A board, move jumper JP7 to the LOCAL position. Place a jumper wire between the VIN turret of the DC980B and the 12VIN turret of the DC980A. Note that the LTC2970’s voltage range is 8V to 15V. Ensure that the DC980B is powered by a voltage between 8V and 15V. Apply power. Figure 3. Connecting DC980A/B Boards with VIN Jumper to 12VIN Turret The 12V telemetry register and plot should look like this: dc980abf 7 DEMO MANUAL DC980A/DC980B DC980A Details Figure 4. DC980A Board dc980abf 8 DEMO MANUAL DC980A/DC980B DC980B Details Figure 5. DC980B Board dc980abf 9 DEMO MANUAL DC980A/DC980B Parts List—DC980A ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C1 CAP CER 1µF 16V 20% X7R 0603 TDK C1608X7R1C105M 2 2 C2, C15 CAP TANTALUM 10µF 25V 20% 6032 AVX TAJW106M025R 3 2 C9, C13 CAP CER 0.1µF 16V 20% X7R 0603 AVX 0603YC104MAT 4 1 D1 DIODE, SCHOTTKY 200mW SOT-23 DIODES INC BAT54 5 1 R1 RES 10kΩ 0.1W 5% 0603 SMD VISHAY CRCW0603103JRT6 6 1 R2 RES 100kΩ 0.1W 5% 0603 SMD VISHAY CRCW0603100KFKEA 7 13 R3, R7 TO R11, R15, R16, R19 TO R23 RES 0Ω 0.1W 0603 SMD VISHAY CRCW0603000ZRT6 8 3 R4, R5, R6 RES 2kΩ 0.1W 1% 0603 SMD VISHAY CRCW06032K00JNEA 9 3 R12, R13, R14 RES 4.99kΩ 0.1W 1% 0603 SMD VISHAY CRCW06034K99JNEA 10 2 R17, R18 RES 6.34kΩ 0.1W 1% 0603 SMD VISHAY CRCW06036K34JNEA 11 1 U1 IC, 2-CH POWER SUPPLY MONITOR AND MARGIN CONTROLLER LINEAR TECHNOLOGY LTC2970CUFD 12 1 U2 IC, 2k-Bit I2C SERIAL EEPROM MICROCHIP 24LC025-I/ST Additional Demo Board Circuit Components 13 0 C3, C4, C5, C8, C10 TO C12, C14 (OPT) OPTION - DO NOT STUFF 14 0 C6, C7 (OPT) OPTION - DO NOT STUFF Hardware: For Demo Board Only 15 1 J1 2MM PIN HEADER, 2x7 MOLEX 87831-1420 16 1 JP8 CONN HEADER, 2x10 RIGHT ANGLE MILL-MAX 802-10-020-20-001 17 7 JP1 TO JP7 2MM PIN HEADER, 1x3 SAMTEC TMM-103-02-L-S 18 4 MH1 TO MH4 STANDOFF, NYLON SNAP-ON KEYSTONE 8831 19 7 SH1 TO SH7 SHUNT FOR 2MM PIN HEADER SAMTEC 2SN-BK-G 20 18 TP1 TO TP18 TERM SOLDER TURRET 0.219" 0.078"L MILL MAX 2501-2-00-80-00-00-07-0 dc980abf 10 DEMO MANUAL DC980A/DC980B Parts List—DC980B ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 3 CB1, CB2, C12 CAP CER 0.1µF 16V 10% X7R 0603 MURATA GRM188R71C104KA01D 2 2 CIN1, CIN2 CAP CER 10µF 25V 10% X7R 1210 MURATA GRM32DR71E106KA12L 3 1 CIN3 CAP ALUM 33µF 25V 20% 6.3x6 SMD NICHICON PCV1E330MCL1GS 4 1 COUT1 CAP ALUM POLY 150µF 6.3V 7343 PANASONIC EEF-CX0J151XR 5 1 COUT2 CAP ALUM POLY 180µF 4V 7343 PANASONIC EEF-SX0G181ER 6 2 C2, C15 CAP CER 100pF 50V 5% C0G 0603 MURATA GRM1885C1H101JA01D 7 2 C3, C16 CAP CER 470pF 50V 5% C0G 0603 MURATA GRM1885C1H471JA01D 8 3 C5, C7, C14 CAP CER 1000pF 50V 5% C0G 0603 MURATA GRM1885C1H102JA01D 9 3 C4, C10, C19 CAP CER 1µF 10V 10% X5R 0603 MURATA GRM188R61A105KA61D 10 2 C9, C13 CAP CER 1µF 25V 10% X7R 0805 TDK C2012X7R1E105K125AB 11 1 C11 CAP TANT 4.7µF 10V 0805 MURATA GRM21BR71A475KA73K 12 2 C20, C21 CAP CER 10nF 25V 10% X7R 0603 MURATA GRM188R71E103KA01D 13 2 D1, D3 SCHOTTKY DIODE 30V 0.1A SOD-323 CENTRAL SEMI CMDSH-3 TR 14 2 L1, L2 INDUCTOR, 2.2µH WÜRTH 74437346022 15 2 Q1, Q2 MOSFET Nch DUAL PWR SW 30V 12mΩ SO8 IR IRF8313PBF 16 5 R1, R7, R11, R12, RIN1 RES 10Ω 0.1W 5% 0603 VISHAY CRCW060310R0JNEA 17 2 R2, R16 RES 10kΩ 0.1W 1% 0603 SMD VISHAY CRCW0603103JRT6 18 2 R3, R18 RES 100kΩ 0.1W 1% 0603 SMD VISHAY CRCW0603100KFKEA 19 2 R4, R10 RES 42.2kΩ 0.1W 1% 0603 SMD VISHAY CRCW060349K2FKEA 20 3 R5, R20, R21 RES 20kΩ 0.1W 1% 0603 SMD VISHAY CRCW060320K0FKEA 21 1 R6 RES 105kΩ 0.1W 1% 0603 SMD VISHAY CRCW0603105KFKEA 22 2 R13, R26 RES 30.1kΩ 0.1W 1% 0603 SMD VISHAY CRCW060330K1FKEA 23 2 R14, R24 RES 95.3kΩ 0.1W 1% 0603 SMD VISHAY CRCW060395K3FKEA 24 2 R19, R22 RES 8.2kΩ 0.1W 5% 0603 SMD VISHAY CRCW06038K20FKEA 25 1 R27 RES 1kΩ 0.1W 5% 0603 SMD VISHAY CRCW06031K00JNEA 26 1 R28 RES 147kΩ 0.1W 1% 0603 SMD VISHAY CRCW0603147KFKEA 27 1 R29 RES 196kΩ 0.1W 1% 0603 SMD VISHAY CRCW0603196KFKEA 28 2 RSENS1, RSENS2 RES 0.01Ω 0.5W 1% 1206 STACKPOLE CSR1206FK10L0 29 1 U1 IC, 2-CH STEP DOWN CONTROLLER QFN28 LINEAR TECHNOLOGY LTC3828EUH dc980abf 11 DEMO MANUAL DC980A/DC980B Parts List—DC980B ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Additional Demo Board Circuit Components 30 0 C6, C17 (OPT) CAP CER 180PF NPO 5% 0603 (OPT) DO NOT INSTALL 31 0 C22 (OPT) CAP CER 10nF 25V 10% X7R 0603 (OPT) DO NOT INSTALL 32 0 D4, D2 (OPT) DIODE, POWERMITE (OPT) DO NOT INSTALL 33 0 D5 (OPT) DIODE, SOT-323 (OPT) DO NOT INSTALL 34 0 Q3, Q4 (OPT) MOSFET Nch DUAL PWR SW 30V SO8 (OPT) DO NOT INSTALL 35 0 Q5, Q6 (OPT) MOSFET Nch DUAL PWR SW 30V SO8 (OPT) DO NOT INSTALL 36 0 R8, R9, R23, R25 (OPT) RES USER SELECTABLE 0603 (OPT) DO NOT INSTALL 37 4 R15, R17, R30, R31 RES 0Ω 0.1W 0603 SMD VISHAY CRCW0603000ZRT6 38 4 R32 TO R35 RES 10Ω 1/16W 5% 0603 PANASONIC ERJ-3EKF10R0V Hardware: For Demo Board Only 39 7 E1, E2, E5, E7, E12 TO E14 TERM SOLDER TURRET 0.156"H 0.084"L MILL MAX 2308-2-00-80-00-00-07-0 40 6 E4, E6, E8 TO E11 TERM SOLDER TURRET 0.219" 0.078"L MILL MAX 2501-2-00-80-00-00-07-0 41 7 JP1 TO JP7 2MM PIN HEADER 1X3 WÜRTH 620 003 111 21 42 1 JP8 CONN RECEPT, 2x10 RIGHT ANGLE MILL-MAX 803-93-020-20-001 43 4 MH1 TO MH4 STANDOFF, NYLON SNAP-ON KEYSTONE 8831 44 7 SH1 TO SH7 SHUNT FOR 2MM PIN HEADER WÜRTH 608 002 134 21 dc980abf 12 D C B A GPIO_1 GPIO_0 GPIO_CFG 19 17 15 13 11 9 7 5 3 1 1 20 18 16 14 12 10 8 6 4 2 ANALOG INTERFACE JP8 (0 - 6 V) (0 - 6 V) TP8 (0 - 6 V) VIN0B- VIN1A+ VIN1A- TP7 TP6 (8 - 15V) 12VIN VOUT1 VOUT0 (0 - 6 V) 2 TP18 TP16 TP12 TP10 TP9 (0 - 6 V) VIN1B- VIN1B+ (0 - 6 V) VIN0B+ TP5 (0 - 6 V) VIN0A- TP4 (0 - 6 V) TP3 TP2 VIN0A+ GND VDD 4.5 - 5.75V TP1 R20 0 R19 0 R16 0 R15 0 R11 0 R8 0 R7 0 R3 0 C15 10uF VDD + C14 C12 C11 C10 C8 C5 C4 C3 [option] [option] [option] [option] [option] [option] [option] [option] 3 3 BAT54 D1 HI 1uF VIN1_B+ VIN1_A- VIN1_A+ VIN0_B- VIN0_B+ VIN0_A- VIN0_A+ JP1 LO 0.1uF C13 VDD LTC2970CUFD 7 IN1B- IN1B+ 6 5 IN1A+ IN1A- 4 IN0B- 2 3 1 IN0AIN0B+ IN0A+ U1 C1 1 ASELO 2 24 25 GND 8 3 ASEL0 1 4 JP2 LO 4 3 R21 0 R22 0 IOUT1 IOUT0 GPIO_1 GPIO_0 ALERT SCL SDA 2 JP5 R17 GND IOUT1 6.34K 1 HI 100K R2 VDD DAC 1 TERMINATION 13 14 15 16 17 18 19 R1 10K VDD GPIO_CFG HI ASEL1 ASEL0 12VIN 22 ASEL1 10 23 REF VIN1_B- REF_GND VDD 9 2 20 ASEL1 VOUT0 11 21 GPIO_CFG VOUT1 12 2 R18 GND IOUT0 6.34K R4 2K 5 DO NOT SCALE DRAWING THIRD ANGLE PROJECTION C7 [option] [option] SCL SDA 10/25/05 DRAWN Chris Pollard SCL WP VCC 6 REVISION HISTORY DESCRIPTION ON OFF JP4 WRITE-PROTECT R13 4.99K + IOUT1 IOUT0 ALERTB GPIO_0 GPIO_1 10/25/05 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 R14 4.99K TECHNOLOGY 2 R12 4.99K C2 10uF R23 0 8 DATE 7 FILENAME: 980A.DSN DWG NO SHEET DC980A 8 1 MONITOR AND MARGIN CONTROLLER SCH, LTC2970CUFD, DUAL POWER SUPPLY 5 6 7 8 SIZE CAGE CODE TITLE VSS SDA A2 A1 A0 7 TYPO CORRECTIONS AND PARTS MADE OPT. Tuesday, December 06, 2005 SCALE:NONE DESIGNER ENGINEER APPROVED CHECKED DATE 4 3 2 R9 0 R10 0 VIO 2 REV U2 24LC025 0.1uF 1 APPROVALS ECO C9 DC590A LOCAL VDD C6 CONTRACT NO. R6 2K JP7 6 VDD SOURCE 2 R5 2K UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL PER ASME Y14.5M -1994 DAC 0 TERMINATION 2 JP6 GPIO_CFG JP3 3 GND 5 (option) 2 3 1 (option) 3 1 1 3 1 3 1 This circuit is proprietary to Linear Technology and supplied for use with Linear Technology parts. Customer Notice:Linear Technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customers 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 Applications Engineering for assistance. 2 I C PORT J1 OF IOUT1 TP17 IOUT0 TP15 1 REV 2 ALERTB TP14 GPIO_0 TP13 GPIO_1 TP11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 APPROVED D C B A DEMO MANUAL DC980A/DC980B Schematic Diagram dc980abf 13 A B C DCM CCM JP3 FCB 550KHz 250kHz R18 100K VIN E13 TRACEXT1 2 R27 1K E7 PLLIN/FCB PHSMD ON OFF ON OFF 1 R19 8.2K C21 0.01uF 5 R25 opt. R23 opt. TRCKSS1 VOUT2 JP6 VOUT2 TRACK2 3 EXT1 1 3 JP5 R21 20K R20 20K 2 RUN2 JP4 RUN1 C20 0.01uF R16 10K E2 E1 C7 1000pF TRCKSS1 JP2 FSET 2 R3 100K INTVCC 3 D 3 1 3 1 CLKOUT 2 1 2 14 1 1 R6 8.2K R22 C17 opt. E14 TRACEXT2 196K 1% 1 R11 10 C14 1000pF 4 R8 opt. C22 opt. R26 30.1K 4 9 8 13 12 11 10 7 6 5 3 2 1 32 31 30 NC NC VOSENSE2 ITH2 SENSE2+ SENSE2- TRCKSS2 SGND FCB/PLLIN RUN1 PLLFLTR 4 PGOOD RUN2 BOOST2 TG2 SW2 BG2 PGND BG1 INTVCC DRVCC VIN SW1 TG1 BOOST1 CLKOUT PHSMD VOSENSE1 SENSE1- SENSE1+ ITH1 TRCKSS1 U1 LTC3828EUH 29 R12 10 R24 TRCKSS2 95.3K VOUT1 3 JP7 VOUT1 TRACK1 EXT2 R14 95.3K 1% R10 42.2K R13 470pF C16 opt. 10 R7 C5 1000pF R1 10 TRCKSS2 30.1K 1% R29 100pF opt. R9 105K 1% C6 C15 147K 1% 0 R4 42.2K 2 20K 1% R28 R5 C3 470pF C2 100pF 3 JP1 PHSMD 0 R15 2 5 14 15 16 17 18 20 19 22 21 23 24 25 26 28 27 10K R2 0 BG2 4 3 56 56 3 L1 3 78 78 2.2uH L2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 0.008 RSENS2 D4 opt. CIN1 10uF 25V D2 opt. 0.007 RSENS1 2 Chris Pollard 10/25/05 DATE DESIGNER 2 5V/5A E9 GND FILENAME: SIZE CAGE CODE SCALE: TECHNOLOGY 0 ANALOG INTERFACE 2 4 6 8 10 12 14 16 18 20 JP8 1 3 5 7 9 11 13 15 17 19 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 1 DWG NO 1 SHEET DC980B 1 Dual Output Step-Down DC/DC with Tracking LTC3828EUH 10 R31 VOUT2 3.3V/5A GND R35 E11 0 VIN 7V to 21V R30 GND E8 E6 10 R33 VOUT1 E10 C19 1.0uF VOUT2 TITLE R34 10 E4 C4 1.0uF + CIN3 33uF 35V VIN + COUT2 220uF 4V CIN2 10uF 25V R32 VOUT1 10 + COUT1 220uF 6.3V ENGINEER Andy Gardner 10/25/05 APPROVED CHECKED DRAWN APPROVALS CONTRACT NO. Q2 IRF8313PBF 2 1.0uF 25V 1 C13 25V C9 1 1.0uF 2 Q1 IRF8313PBF 2.2uH 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 CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. CUSTOMER NOTICE TG2 10 C12 0.1uF RIN1 4 TG1 BG1 CMDSH-3 D1 opt. D5 D3 CMDSH-3 CB2 0.1uF + C11 4.7uF 10V INTVCC CB1 0.1uF E5 PGOOD INTVCC SW2 SW1 C10 1.0uF R17 E12 DRVCC 3 OF 2 REV 2 A B C D DEMO MANUAL DC980A/DC980B Schematic Diagram dc980abf 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 5 5 4 4 123 Q5 HAT2165H 4 4 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 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 CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. Chris Pollard DATE 10/25/05 3 Wednesday, October 26, 2005 DESIGNER ENGINEER Andy Gardner 10/25/05 APPROVED CHECKED DRAWN APPROVALS CONTRACT NO. 123 SCALE: 2 TECHNOLOGY 2 FILENAME: DWG NO 1 SHEET DC980B 2 1 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 Dual Output Stepdown DC/DC with Tracking LTC3828EUH SIZE CAGE CODE TITLE Q6 HAT2165H 5678 5678 SW2 Q4 HAT2168H 5678 VIN 123 BG2 4 3 123 SW1 TG2 Optional Circuit Q3 HAT2168H 5678 CUSTOMER NOTICE BG1 TG1 VIN 4 OF 2 REV 2 A B C D DEMO MANUAL DC980A/DC980B Schematic Diagram dc980abf 15 DEMO MANUAL DC980A/DC980B 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 dc980abf 16 Linear Technology Corporation LT 0915 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2015