5 4 S2+ R12 10 S2- R13 10 S3S3+ C4 2200PF C5 2200PF D J2 VIN- 33 SGND +5V 4 SENSE1+ 5 SENSE1- 6 SENSE2+ 7 SENSE2- 8 SENSE3- 9 SENSE3+ DRVIN 21 BG1 20 PGND 19 BG2 18 C11 1UF BG3 17 SW3 16 TG3 15 UVADJ 3 BAT54 C6 2200PF C35 VIN+ 1 S1- S1+ 2 2 5 VOUT+ 10 VOUT+ COUT2 D5 Q4 IRF6607 VOS+ R28 R25 0.0015 1 B320A 100uF COUT3 COUT4 COUT5 COUT6 100uF 100uF 100uF R18 VIN+ 357K 1 R8 3 10K JP5 2 60 1 Q5 IRF6604 5 1UF C15 C16 COUT12 22UF 22UF 22UF 10 VOUTE6 VOS- Q6 IRF6607 5 J5 VOUT+ J4 VOUTR29 2 VOS- R27 0.0015 1 C 1.5V/60A C36 CIN4 10UF L3 0.36uH 300 CLKOUT SELECT CIN10 1uF J3 VOUT+ 100uF 1 +5V VOSVOUT+ D6 B B320A 6 7 R17 133K C12 4.7UF 10V 1206 D3 LTC3731CUH R30 OPT L2 0.36uH +5V E5 VOS+ C10 0.1UF BOOST3 14 PHASMD/PG 13 ITH VOS+ CIN3 10UF VIN+ RUN/SS 12 R20 1 5 CIN9 1uF 2 3 4 5 EAIN OPT E2 CIN7 OPT S2- 3 0.22UF TG2 23 SW2 22 Q3 IRF6604 S2+ DIFFOUT C13 2 DIFF- 2 11 1 2 3 4 SW1 25 BOOST2 24 1 DIFF+ 1 1 2 3 4 32 VIN+ 6 7 PLLFLTR BOOST1 27 FCB TG1 26 B RUN/SS 1 2 3 4 6 7 31 10 R14 10 R15 10 CIN6 OPT J1 VIN+ 5V TO 14V D4 S3- R11 10 CIN5 OPT CLKOUT B320A S3+ S1- E3 VIN- 1 R10 10 CIN1 270uF 16V R23 0.0015 1 2 VDIFFOUT PLLIN 30 Q2 IRF6607 5 0.22UF 1 2 3 4 E13 C14 CLKOUT 28 29 1 2 3 4 R7 12.1K S1+ CIN11 10UF 16V + 6 7 BM 47pF E12 VIN+ VINL1 0.36uH 1 2 3 4 COM C21 EAIN APPROVED 05/13/03 3 FCB JP2 1 3 C34 330pF VOS- CIN2 10UF 2 U1 2 C CIN8 1uF Q1 IRF6604 5 JP1 FREQ SGND R6 8.06K DATE PROTO VIN+ 6 7 VOS+ D1 BAT54A 6 7 C3 1000PF 3 1UF 1 R510K +5V C1 1 C2 0.01UF VIN+ +5V 10 R4 2.43K DESCRIPTION CLKOUT R1 EXT SYNC 2 INT PROG REV 4 SYNC-IN R3 8.06K 1 ECO 2 E1 SYNC-IN 2 REVISION HISTORY 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. D 3 +C18 +C19 OPT OPT +C20 +C30 470uF +C49 470uF 470uF +C50 470uF RUN/SS C7 0.01UF R16 4.75K C8 2200PF VOUT+ R41OPT C9 100PF +5V R42 C51 C52 100uF 100uF 100uF 100uF 100uF 100uF 100uF 100uF C53 C54 C55 C56 C57 C58 OPT E11 ITH E4 PG UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL PER ASME Y14.5M -1994 A NOTES: [1] DO NOT STUFF THIRD ANGLE PROJECTION CONTRACT NO. APPROVALS DRAWN DATE MEI 07-15-02 CHECKED TECHNOLOGY TITLE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 A SCH,LTC3731CUH, 3-PHASE HIGH EFFICIENCY DC/DC CONVERTER APPROVED ENGINEER SIZE CAGE CODE DESIGNER Custom DO NOT SCALE DRAWING 5 4 3 Wednesday, October 29, 2003 SCALE:NONE 2 DWG NO REV 4 DC558A FILENAME: 558A-4.DSN SHEET 1 1 OF 2 4 1 2 1 R34 3 50K SLOPE UP 7 R36 1K VR1 0603 LT1004-1.2 + OFF OPT 0603 IMAX ADJ. 5% DLC JP7 2 R38 20K 2 4 8 5 + - 1 Q15 FMMT718 7 5% X7R 0603 SUD50N03-10CP J6 LOAD STEP 1 0.1UF X7R 0603 -12V R40 0.005 R19 0.005 2512 2512 C 2 3 4 5 C26 X7R 0603 VOUT+ C32 0.1UF Q14 1 0603 4.7uF 16V C31 1uF 22UF R39 2K ON C25 3528 C17 2 - VOUT+ 0603 3 8 U3A LT1361CS8 + 6 4 SOD323 1 2 C33OPT 1 - X7R 3 D2 + 2 C29 0.01uF 6 SOD323 C23 0.01uF X7R 0603 3 50K CMDSH-3 CMDSH-3 C22 0.1UF R33 5 U4 LT1210CR 0603 R43 D X7R 0603 5% 3 1 X7R 0603 + 1 3 0.1UF R37 3.9K U3B LT1361CS8 4.7uF 16V C28 0.1UF C27 3528 1 2 D9 2 1 5% 0603 3 Q16 FMMT619 1uF 8 R35 390K 4 R32 1.5K OUT C46 C37 6 TRIG RSET DSCH THRES CON TLC555CD +12V +12V TRIG1 5% 0603 1 +12V C24 100pF 2 GND VDD 8 2 4 7 6 5 5% 0603 U2 3 SOT23 SLOPE DOWN R31 39K C 1 4 +5V 2 MMBZ5231BLT1 D7 DYNAMIC LOAD CIRCUIT D 3 3 5 VIN+ C40 1uF 25V R9 13.3K 1 C42 4.7uF L5A 6328-TO64 U7 B 1 IN C44 1uF OUT 3 SHDN 1% 0603 LT1761ES5-5 3 B0540W 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. 3 C45 0.01uF ADJ 4 + X7R 0603 1 +5V JP6 5V SEL C48 10uF 10V E8 PGND 2 -12V UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL PER ASME Y14.5M -1994 THIRD ANGLE PROJECTION CONTRACT NO. APPROVALS DRAWN CHECKED MEI DATE 07-15-02 TECHNOLOGY TITLE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 A SCH, LTC3731CUH, 3-PHASE HIGH EFFICIENCY DC/DC CONVERTER APPROVED ENGINEER DESIGNER SIZE CAGE CODE Custom DO NOT SCALE DRAWING 5 5 E7 EXT 16V 1206 D10 1 INT C43 4.7uF L5B 6328-TO64 A VIN+ 16V 1206 2 NPO 0603 1 C41 10pF 2 LT1930ES5 1% 0603 2 OFF FB 3 R44 115K +5V C471uF B0540W GND 2 4 SHDN 1206 SW 1 ON VIN 5 U6 GND DLC BIAS 1 35V 1206 C38 1uF JP8 2 C39 4.7uF 3 B CMD4D08-100 1 4 +5V +12V D8 2 2 L4 4 3 Wednesday, October 29, 2003 SCALE:NONE 2 DWG NO REV 4 DC558A FILENAME: 558A-4.DSN SHEET 1 2 OF 2