DEMO MANUAL DC2066A LTM4677EY Dual 18A or Single 36A µmodule Regulator With Digital Power System Management. Description

Transcription

1 Description DEMO MANUAL DC066A LTM677EY Dual 8A or Single 6A µmodule Regulator With Digital Power System Management Demonstration circuit 066A is a dual-output, high efficiency, high density, µmodule regulator with.v to 6V input range. Each output can supply 8A maximum load current. The demo board has a LTM 677 µmodule regulator, which is a dual 8A or single 6A step-down regulator with digital power system management. Please see the LTM677 data sheet for more detailed information. DC066A 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 I C/SMBus/PMBus dongle DC6A 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: For more details and instructions of LTpowerPlay, please refer to LTpowerPlay GUI for LTM677 Quick Start Guide. Design files for this circuit board are available at 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. Board Photo Figure. Dual-Output LTM677/DC066A Demo Circuit dc066af

2 DEMO MANUAL DC066A Performance Summary Table. Performance Summary (T A = C) PARAMETER CONDITIONS MIN TYP MAX UNITS Input Voltage Range. 6 V Output Voltage, V OUT0 V IN =.V to 6V, I OUT0 = 0A to 8A 0..8 V Maximum Output Current, I OUT0 V IN =.V to 6V, V OUT0 = 0.V to.8v 8 A Output Voltage, V OUT V IN =.V to 6V, I OUT = 0A to 8A 0..8 V Maximum Output Current, I OUT V IN =.V to 6V, V OUT = 0.V to.8v 8 A Typical Efficiency V IN = V, V OUT =.8V, I OUT = 8A 87.9 % (See Figures and 6) Default Switching Frequency 00 khz Quick Start Procedure Table. LTM677 Demo Boards for Up To 0A Point-of-Load Regulation MAXIMUM OUTPUT CURRENT NUMBER OF OUTPUTS NUMBER OF LTM676 µmodule REGULATORS ON THE BOARD DEMO BOARD NUMBER Dual 8A DC066A 70A DCA-A 0A DCA-B 0A DCA-C Demonstration circuit 066A is easy to set up to evaluate the performance of the LTM677EY. Refer to Figure for the proper measurement equipment setup and follow the procedure below.. With power off, connect the input power supply to V IN (.V to 6V) and (input return).. Connect the.0v output load between V OUT0 and (Initial load: no load).. Connect the.8v output load between V OUT and (Initial load: no load).. Connect the DVMs to the input and outputs. Set default jumper position: SW: ON; SW: ON.. Turn on the input power supply and check for the proper output voltages. V OUT0 should be.0v ±%, and V OUT should be.8v ±%. 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. 7. Connect the dongle and control the output voltages from the GUI. See LTpowerPlay GUI for the LTM677 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 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. dc066af

3 DEMO MANUAL DC066A Quick Start Procedure I OUT + I OUT0 + LOAD 0A TO 8A LOAD0 0A TO 8A V OUT + V OUT0 +.V TO 6V I IN + DC066A F0 V IN + Figure. Proper Measurement Equipment Setup + C OUT V OUT Figure. Measuring Output Voltage Ripple dc066af

4 DEMO MANUAL DC066A Quick Start Procedure Connecting a PC to DC066A You can use a PC to reconfigure the power management features of the LTM677 such as: nominal V OUT, margin set points, OV/UV limits, temperature fault limits, sequencing parameters, the fault log, fault responses, GPIOs and other functionalities. The DC6A dongle may be plugged when V IN is present. INPUT POWER SUPPLY USB CABLE VIN USB TO I C/PMBus DONGLE DC6A -PIN (J) CONNECTOR LTM677 DEMO BOARD DC066A V OUT0 LOAD0 LOAD V OUT Figure. Demo Setup with PC 9 V IN = V, f S = 00kHz, CCM 9 V IN = V, f S = 00kHz, CCM EFFICIENCY (%) V O = 0.9V V O =.0V V O =.V V O =.V V O =.8V LOAD CURRENT (A) EFFICIENCY (%) V O = 0.9V V O =.0V V O =.V V O =.V V O =.8V LOAD CURRENT (A) Figure. Efficiency vs Load Current at V IN = V Figure 6. Efficiency vs Load Current at V IN = V dc066af

5 DEMO MANUAL DC066A Quick Start Procedure 0A TO.A LOAD STEP 0A TO.A LOAD STEP V OUT0 (0MHz BW) 0mV/DIV V OUT (0MHz BW) 0mV/DIV 0µs/DIV Figure 7. Output Voltage V OUT0 vs Load Current (V OUT0 =.0V), Measured by X Probe on C OUT8 0µs/DIV Figure 8. Output Voltage V OUT vs Load Current (V OUT =.8V), Measured by X Probe on C OUT V OUT0 (0MHz BW) 0mV/DIV V OUT (0MHz BW) 0mV/DIV.0µs/DIV.0µs/DIV Figure 9. Output Voltage Ripple at V IN = V, V OUT0 =.0V, I OUT0 = 8A, Measured by X Probe on C OUT8 Figure 0. Output Voltage Ripple at V IN = V, V OUT =.8V, I OUT = 8A, Measured by X Probe on C OUT Figure. Thermal at V IN = V, V OUT0 =.0V, I OUT0 = 8A, V OUT =.8V, I OUT = 8A, T A = C, 00LFM Airflow dc066af

6 DEMO MANUAL DC066A LTpowerPlay SOFTWARE GUI LTpowerPlay is a powerful Windows based development environment that supports Linear Technology power system management ICs and μmodules, including the LTM67, LTM676, LTM677, LTC880, LTC88, LTC88, LTC97 and LTC978. 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 DC6A USB-to-SMBus controller to communicate with one of many potential targets, including the LTM67, LTM676, LTM677, LTC880, LTC88, LTC88 s 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: To access technical support documents for LTC Digital Power Products visit Help. View online help on the LTpowerPlay menu. Figure. LTpowerPlay Main Interface 6 dc066af

7 DEMO MANUAL DC066A LTpowerPlay QUICK START GUIDE The following procedure describes how to use LTpowerPlay to monitor and change the settings of LTM677..Download and install the LTpowerPlay GUI: Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC066A. The system tree on the left hand side should look like this: b. A blue message box shows for a few seconds in the lower left hand corner, confirming that LTM677 is communicating: Then, click the W (PC to RAM) icon to write these register values to the LTM677. After finishing this step, you will see the output voltage will change to.v. 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 LTM677. This reads the configuration from the RAM of LTM677 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.v, in the Config tab, type in. 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. dc066af 7

8 DEMO MANUAL DC066A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CIN CAP., 0µF, V, ALUMINUM ELECTR., SUN ELECTRONIC INDUSTRIES, CE0AX CIN, CIN, CIN, CIN CAP., XR, 0µF, V, 0%, 0 MURATA, GRMER6YA06KA 6 COUT-COUT, COUT6-COUT8 CAP., XR, 00µF, 6.V, 0% 0 AVX, 06D07MATA 6 COUT, COUT, COUT9- CAP., 70µF,.V, SP-CAP, D SIZE PANASONIC, EEFGX0E7R C6 CAP., XR, 00nF, 6V, 0%, 060 AVX, 060YD0KAT 6 C7, C8 CAP., X7R, 0nF, V, %, 060 AVX, 060C0JAT 7 C CAP., X7R, µf, V, 0%, 080 AVX, 080C0KATA 8 C, C, C CAP., XR, µf, V, 0%, 060 AVX, 060D0KATA 9 R0-R6, R8, R9, R, R, R77 RES., CHIP, 0k, %, 060 NIC, NRC06F00TRF 0 R0 RES., CHIP, 6.k, %, 060 VISHAY, CRCW0606KFKEA R7, R7 RES., CHIP,.99k, %, 060 NIC, NRC06F99TRF U I.C., LTM677EY#PBF LINEAR TECH., LTM677EY#PBF U I.C., EEPROM SERIAL-I C, k-bit, I.C., TSSOP-8 MICROCHIP, LC0-I/ST R, R RES., CHIP, 7.8k, %, 060 VISHAY, CRCW0607K8FKEA C, C CAP., X7R,.8nF, V, %, 060 AVX, 060C8JATA Additional Demo Board Circuit Components 6 0 C, C-C7 () CAP., 060 IONAL 7 Q N-CHANNEL 0-V MOSFET VISHAY, SUD0N0-09P 8 0 R, R7, R9, R, R, R, R, R6, R6, R66 RES., CHIP, 0Ω, %, 060 NIC, NRC06Z0000TRF 9 0 R8, R6, R7, R8, R9, R, R8, RES., 060 IONAL R, R6, R6, R6, R67, R68, R7, R7, R8, R88, R89, R6, R () 0 0 R7, R0, R9, R8 () RES., CHIP IONAL R8 RES., CHIP, 0Ω, 0.W, 00 NIC, NRC0ZOTRF R RES., CHIP, 0.0Ω, /W, %, 00 VISHAY, WSL00R000FEA R69, R70 RES., CHIP, 0Ω, %, 060 NIC, NRC06F0R0TRF R78 RES., CHIP,.8k, %, 060 NIC, NRC06F8TRF 0 D, D () DIODE IONAL 6 Q9 MOSFET P-CH 0V 0.8A SOT- VISHAY TP00K-T-E Hardware: For Demo Board Only 7 SW0, SW HEADER PIN SINGLE ROW SAMTEC, TMM0-0-L-S 8 J-J CONN, BNC, PINS CONNEX, 0 9 J CONN HEADER POS mm STR DL PCB FCI 98-G06-ULF 0 E-E TESTPOINT, TURRET, 0.06" MILL-MAX, J-J0 BANANA SMALL KEYSTONE, 7- XJP, XJP SHUNT SAMTEC, SN-BK-G (STAND-OFF) STAND-OFF, NYLON 0.0" tall KEYSTONE, 88(SNAP ON) J CONN RECEPT mm DUAL R/A POS SULLINS, NPPN07FJFN-RC J CONN HEADER POS mm R/A GOLD MOLEX, dc066af

9 DEMO MANUAL DC066A Schematic Diagram COMPa ECO REV REVISION HISTORY DESCRIPTION APPROVED DATE PRODUCTION HAORAN W VOUT J6 VOUT C C.8V / 8A.8nF COUT COUT COUT + COUT + COUT0 + COUT 00uF 00uF 00uF 70uF R 70uF 70uF R V 7.8K.V.V EEFGX0E7R EEFGX0E7R EEFGX0E7R R0 D R6 D E 0.0 VIA P 080 VOSNS VOUT_SNS E TESTPOINTS P C7 E E VIN VIN R7 0 J J0 VIN * A A VIN.V - 6V R8 CIN CIN CIN B INTVCC 0uF 0uF 0uF INTVCC F9 E7 + CIN CIN 0uF 0uF B V INTVCC G9 _SNS J9 C C VDD D D E8 E VDD E R9 0 SYNC E9 F J7 SYNC F SVIN VDD SVIN SHARE_CLK E6 SHARE_CLK P B0 R0 R R R R R R6 R8 R9 ALERTB SW0 E0 0K 0K 0K 0K 0K 0K 0K 0K 0K R7 A SYNC SNUB0 SYNC E7 ALERTB SCL 080 SHARE_CLK SHARE_CLK H7 E SCL E E ISNS0a- E ALERTB SDA ISNS0b- ALERT E SDA F E6 SCL F ISNS0a+ SCL ISNS0b+ SDA GPIO0B COMP0a E SDA D6 C GPIO0B C U E GPIO0B C GPIO0 GPIOB D TSNS0B E F GPIOB C C TSNS0A LTM677EY GPIO GPIOB.8nF K6 E8 WP COMP0a F RUN0 R R D8 RUN0 R 7.8K COMP0b 0K F6 RUN P D0 RUN SW0 E VORB0+ _SNS P E0 J6 VDD ON VORB0- VDD R VOSNS0+ D9 VOSNS0+ OFF C6 RUN0 R6 () VOSNS0- E9 G ASEL VOSNS0- ASEL RUN0 INTVCC J7 A.0V / 8A A A + COUT COUT6 COUT7 COUT8 B + COUT + COUT9 70uF 00uF 00uF 00uF B 70uF 70uF.V B J8.V.V EEFGX0E7R EEFGX0E7R C EEFGX0E7R C C D D D R 0 E7 FREQ_CFG R7 () R8 () _CFG R9 VTRIM0_CFG () VOUT_CFG R0 6.K VTRIM_CFG R SW ON OFF RUN RUN E6 VDD B 0_SNS B R NOTE: UNLESS OTHERWISE SPECIFIED. ALL RESISTORS ARE 060. ALL CAPACITORS ARE 060. * WHEN VIN <.7V, SHORT INTVCC TO VIN WITH R8 = 0ohm. A A 60 McCarthy Blvd. CUSTOMER NOTICE APPROVALS Milpitas, CA 90 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A Phone: (08) CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY Fax: (08)-007 HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL HZ LTC Confidential-For Customer Use Only APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. HAORAN W. TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR DUAL STEP-DOWN umodule REGULATOR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. WITH DIGITAL POWER MANAGEMENT THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE SIZE IC NO. B LTM677EY DEMO CIRCUIT 066A DATE: Friday, July 7, 0 SHEET OF REV. 0 A0 A A6 A7 A8 A9 B B B6 B7 B8 B9 VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT J J J K K K L L L M M M FSWPHCFG H CFG G VTRIM0CFG H VOUTCFG G6 VTRIMCFG H F0 G0 G G H0 J0 M0 C0 E H K0 C C6 C7 C8 C9 D D7 G H M M6 M7 M8 M9 G7 G8 E F J K K7 K8 K9 L L L6 L7 L8 L9 F7 F8 S S S S NC NC NC NC VIN VIN VIN VIN VIN VIN VIN VIN VIN SW SNUB ISNSa- ISNSb- ISNSa+ ISNSb+ M TSNSB K TSNSA J COMPa COMPb VORB VOSNS H J J K K L L M M L0 G G H H H8 J8 J9 H9 Figure. DC066A Demo Circuit Schematic, Page dc066af 9

10 DEMO MANUAL DC066A Schematic Diagram ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN D D VOUT VOUT J J VOUT R0 R DYNAMIC LOAD CIRCUIT C uf R W 0 R9 00 C uf BLEEDER LOADS Q SUD0N0-09P S J DO NOT EXCEED % DUTY CYCLE! R E 0K IOSTEP C C S E E R IOSTEP_CLK E0 C uf C uf IONAL JUMPER FOR DUAL PHASE SINGLE OUTPUT CONFIGURATION R GPIO0B GPIOB RUN R8 RUN0 B B R COMP0a COMPa CUSTOMER NOTICE APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY Fax: (08)-007 HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. HZ VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL LTC Confidential-For Customer Use Only APPLICATION. COMPONENT SUBSTITUTION AND PRINTED A APP ENG. HAORAN W. TITLE: SCHEMATIC A CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR DUAL STEP-DOWN umodule REGULATOR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE WITH DIGITAL POWER MANAGEMENT SIZE N/A DATE: IC NO. 60 McCarthy Blvd. Milpitas, CA 90 Phone: (08)-900 LTM677EY DEMO CIRCUIT 066A Friday, July 7, 0 SHEET OF REV. Figure. DC066A Demo Circuit Schematic, Page 0 dc066af

11 DEMO MANUAL DC066A Schematic Diagram ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN R6 GPIOB R6 D D SYNC ALERTB SDA SCL SHARE_CLK R6 0 GPIO0B D R6 D AUXP E8 RUN0 E R6 0 V V RUN0 J E9 AUXP SDA R8 SCL LGKPWR R66 RUN R68 R67 RUN ALERTB 6 7 GPIO_ 8 OUTEN_0 FAULTB 9 FAULTB OUTEN_ CTRL CTRL 0 ALERTB ALERTB C AUXSCL SDA SDA R69 R70 C AUXSDA SHARE_CLK SHARE_CLK SCL 7 SCL TO DC6A RESETB 7 8 RESETB AUXP 8 9 AUXP UNUSED 9 0 UNUSED C6 UNUSED 0 UNUSED C8 C7 0nF 0nF V V 00nF V V U R7 R7 JDEMO HEADER (F) J DEMO HEADER (M).99K.99K R8 AUXVCC A0 VCC 8 06 EEWP A WP 7 R88 R89 VIN 6 EESCL A SCL EESDA VSS SDA R7 LC0-I/ST R7 B B IONAL CIRCUIT FOR PROGRAMMING WITHOUT VIN PSM STACKING CONNECTORS: J, FEMALE, CONN RECEPT MM DUAL R/A POS, Sullins Conn. NPPN07FJFN-RC J, MALE, CONN HEADER POS MM R/A GOLD, Molex Connector Corp V Q9 VDD TP00K VDD CUSTOMER NOTICE VIN 60 McCarthy Blvd. APPROVALS Milpitas, CA 90 R77 0K LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A Phone: (08) CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY Fax: (08)-007 HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. A R78 VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL HZ LTC Confidential-For Customer Use Only A.8k APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. HAORAN W. TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR DUAL STEP-DOWN umodule REGULATOR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE SIZE B DATE: IC NO. LTM677EY DEMO CIRCUIT 066A Friday, July 7, 0 SHEET OF REV. Figure. DC066A Demo Circuit Schematic, Page 0 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. dc066af

12 DEMO MANUAL DC066A 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 0 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 60 McCarthy Blvd. Milpitas, CA 90 Copyright 00, Linear Technology Corporation LT 09 PRINTED IN USA Linear Technology Corporation 60 McCarthy Blvd., Milpitas, CA (08) -900 FAX: (08) LINEAR TECHNOLOGY CORPORATION 0 dc066af