DEMO MANUAL DC1811B-A LTM4676 Dual Step-Down µModule Regulator with PMBus Digital Power System Management Description Demonstration circuit 1811B-A is a dual-output, high efficiency, high density, µModule® regulator with 4.5V to 26.5V input range. Each output can supply 13A maximum load current. The demo board has a LTM®4676 µModule regulator, which is a dual 13A or single 26A step-down regulator with PMBus power system management. Please see LTM4676 data sheet for more detailed information The DC1811B-A powers up to default settings and produces power based on configuration resistors without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensive power system management features of the part, download the GUI software LTpowerPlay™ onto your PC and use 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 GUI for LTM4676 Quick Start Guide. Design files for this circuit board are available at http://www.linear.com/demo/DC1811BA 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. Board Photo Figure 1. Dual-Output LTM4676/DC1811B-A Demo Circuit dc1811baf 1 DEMO MANUAL DC1811B-A Performance Summary PARAMETER (TA = 25°C) CONDITION VALUE Input Voltage Range 4.5V to 26.5V Output Voltage, VOUT0 VIN = 4.5V to 26.5V, IOUT0 = 0A to 13A 0.5V to 4V, Default: 1V Maximum Output Current, IOUT0 VIN = 4.5V to 26.5V, VOUT = 0.5V to 4V 13A Output Voltage, VOUT1 VIN = 4.5V to 26.5V, IOUT1 = 0A to 13A 0.5V to 5.4V, Default: 1.8V Maximum Output Current, IOUT1 VIN = 4.5V to 26.5V, VOUT = 0.5V to 5.4V 13A Typical Efficiency VIN = 12V, VOUT = 1.8V, IOUT = 13A 86.3% Default Switching Frequency 500kHz Quick Start Procedure Table 1. LTM4676 Demo Cards for Up to 130A Point-of-Load Regulation MAXIMUM OUTPUT CURRENT NUMBER OF OUTPUT VOLTAGES NUMBER OF LTM4676 µMODULE REGULATORS ON THE BOARD DEMO BOARD NUMBER 13A, 13A 2 1x LTM4676 DC1811A/DC1811B-A 13A, 13A 2 1x LTM4676A DC1811B-B 26A 1 1x LTM4676 DC2087A 50A 1 2x LTM4676 DC1989A-A 75A 1 3x LTM4676 DC1989A-B 100A 1 4x LTM4676 DC1989A-C 100A 1 1x LTM4676 (+ 3x LTM4620A) DC2106A-A 130A 1 1x LTM4676 (+ 3x LTM4630) DC2106A-B Demonstration circuit 1811B-A is easy to set up to evaluate the performance of the LTM4676. Refer to Figure 2 for the proper measurement equipment setup and follow the procedure below. 1.With power off, connect the input power supply to VIN (4.5V to 26.5V) and GND (input return). 2.Connect the 1.0V output load between VOUT0 and GND (Initial load: no load). 3.Connect the 1.8V output load between VOUT1 and GND (Initial load: no load). 4.Connect the DVMs to the input and outputs. Set default jumper position: JP1: ON; JP2: ON. 5.Turn on the input power supply and check for the proper output voltages. VOUT0 should be 1.0V ±1 %, and VOUT1 should be 1.8 ±1%. 6.Once the proper output voltages are established, adjust the loads within the operating range and observe the output voltage regulation, ripple voltage and other parameters. 2 7.Connect the dongle and control the output voltages from the GUI. See “LTpowerPlay GUI for the LTM4676 Quick Start Guide” for details. Note: When measuring the output or input voltage ripple, do not use the long ground lead on the oscilloscope probe. See Figure 3 for the proper scope probe technique. Short, stiff leads need to be soldered to the (+) and (–) terminals of an output capacitor. The probe’s ground ring needs to touch the (–) lead and the probe tip needs to touch the (+) lead. Connecting a PC to DC1811B-A You can use a PC to reconfigure the power management features of the LTM4676 such as: nominal VOUT, margin set points, OV/UV limits, temperature fault limits, sequencing parameters, the fault log, fault responses, GPIOs and other functionality. The DC1613A dongle may be plugged when VIN is present. dc1811baf DEMO MANUAL DC1811B-A Quick Start Procedure A + - + Load1 (0~13A) - V A - Load0 (0~13A) + + V - Vout0 Vout1 VIN - + + 4.5V-‐26.5V - - A V + Figure 2. Proper Measurement Equipment Setup + VOUT – COUT GND Figure 3. Measuring Output Voltage Ripple dc1811baf 3 DEMO MANUAL DC1811B-A Quick Start Procedure Input Power Supply USB Cable USB to I2C/PMBus Dongle DC1613A VIN 12-‐PIN (J1) Connector Vout0 LTM4676 Demo Board DC1811B-‐A Load0 Load1 Vout1 Figure 4. Demo Setup with PC 95 VIN = 5V, fSW = 500kHz, CCM 95 90 90 85 85 80 75 70 65 VOUT = 1V VOUT = 1.2V VOUT = 1.5V VOUT = 1.8V VOUT = 2.5V VOUT = 3.3V 0 1 2 3 4 5 6 7 8 9 10 11 12 13 LOAD CURRENT (A) DC1811A F05 Figure 5. Efficiency vs Load Current at VIN = 5V 4 EFFICIENCY (%) EFFICIENCY (%) 100 80 75 70 65 60 VIN = 12V fSW = 500kHz CCM VOUT = 1V VOUT = 1.2V VOUT = 1.5V VOUT = 1.8V VOUT = 2.5V VOUT = 3.3V VOUT = 5V 0 1 2 3 4 5 6 7 8 9 10 11 12 13 LOAD CURRENT (A) DC1811A F06 Figure 6. Efficiency vs Load Current at VIN = 12V dc1811baf DEMO MANUAL DC1811B-A Quick Start Procedure VOUT0 (20MHz BW) 50mV/DIV VOUT1 (20MHz BW) 50mV/DIV 9.75A TO 13A LOAD STEP 9.75A TO 13A LOAD STEP Figure 7. Output Voltage VOUT0 vs Load Current (VOUT0 RANGE = 0) Figure 8. Output Voltage VOUT1 vs Load Current (VOUT1 Range = 1) VOUT1 (20MHz BW) 10mV/DIV VOUT0 (20MHz BW) 10mV/DIV Figure 9. Output Voltage Ripple at VIN = 12V, VOUT0 = 1V, IOUT0 = 13A Figure 10. Output Voltage Ripple at VIN = 12V, VOUT1 = 1.8V, IOUT1 = 13A Figure 11. Thermal performance at VIN = 12V, VOUT0 = 1.0V, IOUT0 = 13A, VOUT1 = 1.8V, IOUT1 = 13A, TA = 24°C, 200LFM Airflow dc1811baf 5 DEMO MANUAL DC1811B-A LTpowerPlay SOFTWARE GUI LTpowerPlay is a powerful Windows-based development environment that supports Linear Technology power system management ICs, including the LTM4676, 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 LTM4676, the LTC3880 and the LTC3883’s demo system, or a customer board. The software also provides an automatic update feature to keep the soft-ware 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 12. LTpowerPlay Main Interface 6 dc1811baf DEMO MANUAL DC1811B-A LTpowerPlay QUICK START GUIDE The following procedure describes how to use LTpowerPlay to monitor and change the settings of LTM4676. 1.Download and install the LTPowerPlay GUI: d.If you want to change the output voltage to a different value, like 1.5V. In the Config tab, type in 1.5 in the VOUT_COMMAND box, like this: http://www.linear.com/ltpowerplay 2.Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC1811B-A. The system tree on the left hand side should look like this: b.A green message box shows for a few seconds in the lower left hand corner, confirming that LTM4676 is communicating: Then, click the “W” (PC to RAM) icon to write these register values to the LTM4676. After finishing this step, you will see the output voltage will change to 1.5V. If the write is successful, you will see the following message: c. In the Toolbar, click the “R” (RAM to PC) icon to read the RAM from the LTM4676. This reads the configuration from the RAM of LTM4676 and loads it into the GUI. e. You can save the changes into the NVM. In the tool bar, click “RAM to NVM” button, as following f. Save the demo board configuration to a (*.proj) file. Click the Save icon and save the file. Name it whatever you want. dc1811baf 7 DEMO MANUAL DC1811B-A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER CAP., 150µF, 35V, ALUMINUM ELECTR., SUN ELECT., 35CE150AX Required Circuit Components 1 1 CIN1 2 4 CIN2, CIN3, CIN4, CIN5 CAP., X5R, 10µF, 35V, 10%,1210 MURATA, GRM32ER6YA106KA12 3 6 COUT1-COUT3, COUT6-COUT8 CAP., X5R, 100µF, 6.3V, 20%, 1210 AVX, 12106D107MAT2A 4 2 COUT4, COUT5 CAP., 330µF, 6.3V, POSCAP, D3L PANASONIC, 6TPF330M9L 5 2 C1, C14 CAP., X7R, 2200pF, 25V, 10%, 0603 AVX, 06033C222KAT2A 6 1 C26 CAP., X5R, 100nF, 16V, 10%,0603 AVX, 0603YD104KAT2A 7 2 C27, C28 CAP., X5R, 10nF, 16V, 10%,0603 AVX, 0603YD103KAT2A 8 1 C23 CAP., X7R, 1µF, 25V,10%, 0805 AVX, 08053C105KAT2A 9 3 C21, C22, C24 CAP., X5R, 1µF, 25V,10%, 0603 AVX, 06033D105KAT2A 10 2 JP1, JP2 HEADER 3 PIN 0.079 SINGLE ROW SULLIN, NRPN031PAEN-RC 11 3 J2-J4 CONN, BNC, 5PINS CONNEX, 112404 12 1 J1 CONN HEADER 12POS 2Mm STR DL PCB FCI, 98414-G06-12ULF 13 6 J5-J10 BANANA JACK KEYSTONE, 575-4 14 1 Q1 N-Channel 30-V Mosfet VISHAY, SUD50N04-8M8P-4GE3 15 1 D8 DIODE, ULTRA LOW SCHOTTKY RECTIFIER NXP SEMI., PMEG2005AEL 16 1 Q19 P-Channel 30-V Mosfet DIODES INC., DMP3130L-7 17 1 J11 CONN RECEPT 2mm DUAL R/A 14POS (F) SULLINS, NPPN072FJFN-RC 18 1 J12 HEADER 14POS 2mm R/A GOLD (M) MOLEX, 87760-1416 19 1 J13 HEADER, 4 PINS, SHROUDED HIROSE, DF3A-4P-2DSA 20 10 R3, R5, R7, R9, R25, R31, R32, R63, R65, R66 RES., CHIP, 0Ω, 1%, 0603 NIC, NRC06ZOTRF 21 2 R69, R70 RES., CHIP, 10, 1%, 0603 NIC, NRC06F10R0TRF 22 12 R10-R16, R18, R19, R24, R52, R77 RES., CHIP, 10K, 1%, 0603 NIC, NRC06F1002TRF 23 1 R78 RES., CHIP, 15.8K, 1%, 0603 NIC, NRC06F1582TRF 24 1 R30 RES., CHIP, 6.34K, 1%, 0603 VISHAY, CRCW06036K34FKEA 25 3 R2, R72, R73 RES., CHIP, 4.99K, 1%, 0603 NIC, NRC06F4991TRF 26 1 R22 RES., CHIP, 4.22K, 1%, 0603 VISHAY, CRCW06034K22FKEA 27 1 R48 RES., CHIP, 0Ω, 0.5W, 2010 NIC, NRC50ZOTRF 28 1 R53 RES., CHIP, 0.01Ω, 1/2W, 1%, 2010 VISHAY, WSL2010R0100FEA 29 1 U3 IC, 24LC025-I/ST, SOIC MICROCHIP, 24LC025-I/ST 30 1 U1 IC, LTM4676EY#PBF LINEAR TECH., LTM4676EY#PBF Additional Demo Board Circuit Components 1 0 C2, C15-C17(OPT) CAP., 0603 2 0 D1, D2 (OPT) DIODE, SOD-323 3 0 R4, R6, R8, R20, R23, R26-R29, R33, R35, R37, RES., OPTIONAL R38, R41, R49, R61, R62, R64, R67, R68, R74, R75, R82, R83, R88, R89 (OPT) 4 0 R50, R51(OPT) RES., CHIP, 30, 1%, 2512 Hardware-For Demo Board Only 1 24 E1-E17, E20-E24, E28, E29 TESTPOINT, TURRET, 0.062" MILL-MAX, 2308-2-00-80-00-00-07-0 2 2 XJP1, XJP2 SHUNT SAMTEC, 2SN-BK-G 3 4 (STAND-OFF) STAND-OFF, NYLON 0.50" tall (SNAP ON) KEYSTONE, 8833 4 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1811B-A 8 dc1811baf A B C * E17 J8 J7 E15 E5 J9 J10 E4 E2 GND0_SNS GND VOUT0 1.0V / 13A VOUT0_SNS GND GND 4.5V - 26.5V VIN VIN GND 5 R32 0 0 CIN1 150uF 35V R25 + VIN CIN5 10uF 1210 COMP0a COUT7 100uF 1210 P5 P4 OPT P3 COUT8 100uF 1210 VOSNS0- VOSNS0+ R23 OPT 0805 R20 R9 0 A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3 E9 D9 E10 D10 D8 E8 C5 D5 F2 F1 E2 E1 A5 B10 F11 F12 A11 A12 B11 B12 C11 C12 D11 D12 E12 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOUT0 VOSNS0- VOSNS0+ VORB0- VORB0+ COMP0b COMP0a TSNS0b TSNS0a ISNS0a+ ISNS0b+ ISNS0aISNS0b- SNUB0 SW0 VINL VINL VINH0 VINH0 VINH0 VINH0 VINH0 VINH0 VINH0 VINH0 VINH0 0.035 VIA TESTPOINTS P1 M5 R4 0805 OPT R6 OPT P2 COMP1a VOSNS1 R2 4.99K C1 2200pF 3 LTM4676EY / LTM4676AEY U1 * R5 0 OPT R33 4 * WHEN VIN < 5.75V, SHORT INTVCC TO VIN WITH R8 = 0ohm. 1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603. NOTE: UNLESS OTHERWISE SPECIFIED COUT6 100uF 1210 R22 4.22K C14 2200pF CIN4 10uF 1210 + COUT5 330uF 6.3V 6TPF330M9L C15 OPT CIN3 10uF 1210 VOUT0 C16 OPT CIN2 10uF 1210 4 H12 J11 J12 K11 K12 L11 L12 M11 M12 VINH1 VINH1 VINH1 VINH1 VINH1 VINH1 VINH1 VINH1 VINH1 L10 SW1 C2 OPT 3 A4 A6 A7 A8 A9 A10 B4 B5 B6 B7 B8 B9 C4 C6 C7 C8 C9 D4 D7 E3 F3 F10 G3 G10 G11 G12 H3 H10 J4 J10 K4 K7 K8 K9 L4 L5 L6 L7 L8 L9 M4 M6 M7 M8 M9 M10 GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND SNUB1 G2 G1 ISNS1aISNS1b- K5 TSNS1b H2 H1 ISNS1a+ ISNS1b+ J5 TSNS1a H8 COMP1a J9 VORB1 J8 COMP1b H9 VOSNS1 J1 J2 J3 K1 K2 K3 L1 L2 L3 M1 M2 M3 SYNC VDD33 INTVCC INTVCC VTRIM1CFG VOUT1CFG VTRIM0CFG VOUT0CFG FSWPHCFG ASEL VDD25 RUN1 RUN0 WP GPIO1 GPIO0 SDA SCL ALERT SHARE_CLK VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 VOUT1 SGND SGND SGND SGND G7 G8 F7 F8 DNC DNC DNC DNC C10 E11 H11 K10 D 5 SHARE_CLK ALERTB SCL SDA GPIO0B GPIO1B H7 E5 E6 D6 E4 F4 RUN1 VDD25 ASEL FREQ_CFG VOUT0_CFG VTRIM0_CFG VOUT1_CFG VTRIM1_CFG F6 G4 H4 G5 H5 G6 H6 (OPT) R24 10K R16 10K U1 R15 10K 2 HZ JIAN L. SCALE = NONE 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. JP2 1 0 1 E16 JIAN L. APPROVED 1 DEMO CIRCUIT 1811B SHEET 1 LTM4676EY + LTM4676AEY Friday, October 24, 2014 IC NO. DATE 6-2-14 OF 3 1 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only GPIO1B GPIO0B SDA SCL ALERTB SHARE_CLK SYNC VDD33 GND1_SNS GND INTVCC VOUT1_SNS VOUT1 1.8V / 13A VDD25 E14 E13 E12 E11 E10 E6 E9 E8 E7 J5 E3 E1 J6 PRODUCTION DUAL STEP-DOWN uMODULE REGULATOR WITH POWER SYSTEM MANAGEMENT DATE: B SIZE 1 DESCRIPTION REVISION HISTORY TECHNOLOGY GPIO1B GPIO0B SDA SCL ALERTB SHARE_CLK SYNC REV TITLE: SCHEMATIC RUN1 ON OFF 2 R7 __ ECO RUN0 3 RUN1 JP1 OFF ON 1 RUN0 R19 10K 2 3 R18 10K APPROVALS LTM4676AEY R14 10K R3 0 B - B 0 6.34K R13 10K VDD33 VIN COUT4 + 330uF 6.3V 6TPF330M9L LTM4676EY R31 R30 R29 (OPT) R28 (OPT) (OPT) R26 R12 10K R27 R11 10K OPT COUT3 100uF 1210 B - A R10 10K R8 COUT2 100uF 1210 VOUT1 CUSTOMER NOTICE * RUN0 F5 J6 K6 SYNC VDD33 INTVCC E7 J7 F9 G9 C17 OPT COUT1 100uF 1210 2 A B C D DEMO MANUAL DC1811B-A Schematic Diagram dc1811baf 9 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 5 SGND SGND R51 2010 OPT BLEEDER LOADS R50 2010 OPT VOUT1 COMP0a RUN1 GPIO0B R38 RUN0 GPIO1B CUSTOMER NOTICE COMP1a 4 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. VOUT0 J2 E20 C21 1uF SCALE = NONE JIAN L. HZ APPROVALS E22 2 J4 IOSTEP C24 1uF DEMO CIRCUIT 1811B 2 1 SHEET 2 LTM4676EY / LTM4676AEY Friday, October 24, 2014 IC NO. J3 VOUT1 OF 3 1 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 1 C23 1uF 1 C22 1uF 1 DUAL STEP-DOWN uMODULE REGULATOR WITH POWER SYSTEM MANAGEMENT DATE: N/A SIZE R53 0.01 2010 Q1 SUD50N04 R49 2010 OPT VOUT1 TECHNOLOGY R52 10K 1 R48 2010 0.5W 0 VOUT0 TITLE: SCHEMATIC GND DO NOT EXCEED 5% DUTY CYCLE! IOSTEP_CLK 1 DYNAMIC LOAD CIRCUIT 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. R41 OPT. OPT R35 OPT OPTIONAL JUMPER FOR DUAL PHASE SINGLE OUTPUT CONFIGURATION E24 E23 VOUT0 5 4 3 2 D ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN 3 2 4 3 4 2 3 4 5 10 2 3 4 5 5 A B C D DEMO MANUAL DC1811B-A Schematic Diagram dc1811baf A B C SDA SCL WP VCC 24LC025-I/ST VSS A2 A1 A0 U3 TO DC1613A AUXP SDA GND SCL LGKPWR ALERTB GPIO_1 OUTEN_0 OUTEN_1 GND AUXSCL AUXSDA J1 TO DC2086A 100nF C26 5 6 7 3V3 EESDA EESCL EEWP 8 AUXVCC 1 2 3 4 5 6 7 8 9 10 11 12 3V3 4 AUX3V4 3 2 1 2 R72 4.99K Q19 VDD33 DMP3130L-7 E21 AUXP R73 4.99K 5 VIN R77 10K 3 R78 15.8k 2 4 3 2 FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V SCL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SYNC VIN 3V3 R83 OPT R82 OPT 1206 R66 0 R89 OPT R67 OPT R88 OPT FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V 4 OPT 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 SCALE = NONE JIAN L. HZ 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. 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 R63 0 J12 DEMO HEADER (M) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 R68 R65 0 HEADER 14POS 2MM R/A GOLD, Molex Connector Corp. 87760-1416 SHARE_CLK J2, FEMALE, CONN RECEPT 2MM DUAL R/A 14POS, Sullins Conn. NPPN072FJFN-RC J1, MALE, CONN OPT R75 PSM STACKING CONNECTORS: OPT R74 J11 DEMO HEADER (F) SDA R61 OPT C27 10nF R69 10 R64 OPT DATE: N/A SIZE TECHNOLOGY D1 OPT R62 OPT RUN0 GPIO0B E30 RUN1 RUN1 RUN0 E29 GPIO1B 1 DEMO CIRCUIT 1811B SHEET 3 LTM4676EY / LTM4676AEY Tuesday, July 22, 2014 IC NO. OF 3 1 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only C28 10nF R70 10 1 DUAL STEP-DOWN uMODULE REGULATOR WITH POWER SYSTEM MANAGEMENT TITLE: SCHEMATIC D2 OPT ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN ALERTB VDD33 OPTIONAL CIRCUIT FOR PROGRAMMING WITHOUT VIN 4 3 2 1 D8 AUX3V4 SCL GND SDA J13 1 1 D VDD33 5 A B C D DEMO MANUAL DC1811B-A Schematic Diagram 11 dc1811baf DEMO MANUAL DC1811B-A DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation 12 Linear Technology Corporation dc1811baf LT 1114 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2014