5 4 3 2 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. REVISION HISTORY ECO R6 100K 1 2 5 6 2 4 3 4 3 3 VCC 32 ION 31 VRNG N/C 30 3 4 PGOOD N/C 29 5 M/S N/C 28 6 ITH BOOST 27 7 FB 10K INTVCC R17 OPT 1000pF INTVCC INTVCC R19 OPT SHUTDOWN JP2 RUV1 1M 1% PLL/LPF 9 SS/TRACK 26 TG SW 25 SENSE+ 24 10 N/C N/C 23 11 N/C N/C 22 12 SDB N/C 21 13 UVIN SENSE- 20 14 NDRV BGRTN 19 15 EXTVCC 16 INTVCC CC1 27pF 3 C6 1 CIN3 1uF 100V CIN4 1uF 100V CIN5 1uF 100V VIN CIN6 14V-60V 1uF 100V 4 0.1uF TP2 GND C13 R20 OPT OPT Q1 Si7850DP R24 0 L1 5.6uH D1 COUT3 10uF B1100 16V 4 C2 17 DRVCC R21 0 18 BG BG C TP5 VOUT COUT4 10uF 16V COUT1 270uF + 16V VOUT 12V/10A + COUT2 270uF 16V 1uF 33 VIN 8 R15 0 TG Si7850DP D2 BAS19W TP1 CIN2 + 220uF 63V 1 2 3 RC2 GND VIN CIN1 + 220uF 63V 5 6 7 8 CC3 TP8 VIN Q2 5 6 7 8 N/C 1 2 3 4 N/C VON/NC CSS 3 1 3 SS/TRACK OFF TP9 OPT OPT 2 0.01uF 2 Q8 OPT 3 C4 JP1 2 ON Q7 OPT 1 D R5 0 MODE/SYNC TP10 C1 R12 0 1uF 220pF 100K 1% C5 INTVCC B R11 OPT R9 NDRV C7 0.1uF C3 R13 OPT 0 R22 0.015 1% 0 VOUT Q4 OPT TG OPT OPT RFB1 14K B TP7 BGRTN 4 R8 0 TP12 VOUT TPX Q5 Si7850DP 1% BG + C8 4 + C9 OPT OPT + C12 OPT C10 C11 OPT OPT 1 2 3 RFB2 1K 1% RF TP6 GND 1 2 3 CF R23 0.015 1% VIN R18 OPT VOUT 0.1uF 5 6 7 8 RC 1 CC2 RUV2 66.5K 1% 5 6 7 8 TP4 Q6 OPT 1 VIN U1 LTC3810EUH-5 1 MODE/SYNC R10 NDRV INTVCC C Q3 ZXMN10A07F 1 VIN 100pF OPT TP3 PULSE SKIP SYNC FORCE CONTINUOUS R16 OPT 2 INTVCC R4 R1 39.2K 1% SGND PGOOD R14 100K CON TP11 VIN VIN RON 274K 1% OPT APPROVED 11/12/07 2 4 D R3 DATE PROTO VIN VIN R2 10K DESCRIPTION 2 INTVCC VLOGIC REV UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL PER ASME Y14.5M -1994 A THIRD ANGLE PROJECTION CONTRACT NO. APPROVALS DRAWN MEI DATE 09/21/06 TECHNOLOGY SCH, LTC3810EUH-5, HIGH EFFICIENCY HIGH VOLTAGE STEP-DOWN CONVERTER ENGINEER SIZE DESIGNER CAGE CODE DWG NO 4 3 Wednesday, January 02, 2008 2 SCALE: NONE REV DC1168A Custom 5 A TITLE CHECKED APPROVED DO NOT SCALE DRAWING 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 FILENAME: 1168A-2.DSN SHEET 1 2 1 OF 1