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. D D +5V C1 R1 3.40K 1% R41 R78 C76 0 Ohm (Opt) (Opt) 1uF 10V CLK1 VIN+ D1 BAT54A-7 U1 LTC3731CUH 1K 1% R3 C3 1000pF 0 Ohm EAIN 10 1S2+ BOOST1 27 TG1 26 FCB 1 DIFF- 2 DIFFOUT SW1 25 BG1 20 BOOST2 24 DIFF+ 3 EAIN TG2 23 4 SENSE1+ SW2 22 5 SENSE1- +5V 21 6 SENSE2+ PGND 19 10 7 SENSE2- BG2 18 R8 8 SENSE3- BG3 17 9 SENSE3+ SW3 16 C13 1000pF ITH C15 0.01uF R11 10 C16 47pF 10 SS VIN+ ITH RUN/SS 11 ITH 12 UVADJ UVADJ VIN+ TP3 10 TG3 15 BOOST3 14 PHASMD/PG 13 SGND C17 1000pF R13 1S3+ PLLFLTR 10 10 1S3- 30 VOS- C9 1000pF R9 1S2- 28 VOS+ R7 1S1- CLKOUT DIFFOUT R5 1S1+ PLLIN 32 C5 27pF C 29 31 R16 R17 0 Ohm (Opt) TP5 33 CIN1 10uF 16V C2 10uF CIN2 10uF 16V CIN3 10uF 16V CIN4 10uF 16V CIN5 10uF 16V CIN6 10uF 16V + L1 Q3 HAT2165H C6 VIN+ 8V to 14V J2 VIN- Q4 HAT2165H 0.50uH D2 B320A 1S1- R4 0.002 1W VOS+ C7 1uF 0.22uF TP1 C8 22uF 6.3V R6 VOS+ C VOUT+ +5V C10 1uF 10V J3 1 OHM C11 4.7uF J4 Q5 HAT2168H Q6 HAT2168H C12 10uF COUT1 + 330uF 2.5V C14 D3 +5V Q7 HAT2165H Q8 HAT2165H L2 R10 0.50uH 0.002 1W D4 B320A BAT54W 10K COUT2 + 330uF 2.5V COUT3 + 330uF 2.5V COUT4 VOUT+ VRM9.X/10.X@65A/120A COUT5 + 330uF + 330uF 2.5V 2.5V 1S2+ 0.22uF 357K 1% 1S2- C18 1uF C19 22uF 6.3V VOS+ R12 J5 10 VOUT+ C20 1uF TP4 PGND CIN7 270uF 16V OSCON 1S1+ 0.22uF R15 B Q2 HAT2168H C4 R14 R18 121K 1% J1 Q1 HAT2168H R2 Q9 HAT2168H Q10 HAT2168H R19 B C21 10uF 10 VOS1S3+ Q11 HAT2165H Q12 HAT2165H L3 R20 0.50uH 0.002 1W D6 B320A 1S3- C22 1uF J6 COUT6 + 330uF C23 22uF 6.3V 2.5V COUT7 + 330uF 2.5V COUT8 + 330uF 2.5V COUT9 COUT10 + 330uF + 330uF 2.5V 2.5V VOUT- J7 VOUT- TP6 DO NOT POPULATE FOR 721A-B ASSY TYPE A 721A-A 721A-B 6-Phase, 120A 3-Phase, 65A VOS- VOS- A All Components Assembled Delete Components within dashed lines. This page only. Linear Technology Corp. Title Size Date: 5 4 3 2 1630 McCarthy Blvd., Milpitas, CA 95035-7417 Phone: (408)432-1900 Fax: (408)434-0507 6-Phase 120A High Efficiency Power Supply Document Number Rev DEMO CIRCUIT 721A-A Friday, June 23, 2006 1 3 Sheet 1 of 3 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. +5V R21 10K TP7 D D PG +5V VR_HOTB R23 C24 10K 0.01uF R22 1K TP8 +5V R24 C26 R25 TBD 100K +5V C25 1000pF CLK1 U2 LTC3738CUHF R26 2K C28 (Opt) EAIN C30 VOS+ 330pF C R32 4S1+ 10 R29 R30 100 124 1% C34 1000pF 10 R35 4S2+ 10 C38 1000pF VIN+ SS VRON R36 R37 4S2- (Opt) 10 4S3- 10 C42 1000pF R42 4S3+ ITH C40 0.01uF R40 C41 10pF R44 C45 1.50K 1% 2200pF VR_HOTB PGOOD 33 2 PLLFLTR TSNS 15 BOOST1 32 TG1 31 SW1 30 FCB 6 EAIN 4 R34 4S1- 16 1 VOS- IN+ 3 IN- BG1 25 5 AVP BOOST2 29 7 SENSE1+ TG2 28 8 SENSE1- SW2 27 9 SENSE2+ VCC 26 10 SENSE2- PGND 24 11 SENSE3- BG2 23 12 SENSE3+ BG3 22 38 OUTEN SW3 21 13 SS TG3 20 14 ITH BOOST3 19 35 VID0 VID5 34 VID4 18 VID3 17 36 VID1 37 VID2 10 1uF 10V Q13 HAT2168H R27 C29 0 Ohm 0.22uF Q14 HAT2168H C27 10uF 4S1+ R31 C31 0 Ohm 0.22uF R33 C35 1uF 10V C36 4.7uF 1 OHM Q15 HAT2165H Q16 HAT2165H L4 R28 0.50uH 0.002 1W D8 B320A VOUT+ 4S1- C32 1uF C33 22uF 6.3V C +5V Q17 HAT2168H Q18 HAT2168H R38 C39 0 Ohm 0.22uF +5V C37 10uF 4S2+ L5 Q20 HAT2165H D9 Q21 HAT2165H 0.50uH 4S2- R39 0.002 1W D10 B320A BAT54W SGND +5V VIN+ D7 BAT54A-7 C43 1uF C44 22uF 6.3V 39 R81 +5V 100K R82 R77 10K 100K R83 B VRON 100K +5V TP2 0 R79 100K JP6 VRON 1 ON 2 GND VID S1 3 1 6 5 4 3 2 1 VRM SELECT 1 Q22 HAT2168H Q23 HAT2168H VRM9 B C46 10uF 2 B5 B4 B3 B2 B1 B0 4S3+ 3 VRM10 JP1 R84 100K +5V Q24 HAT2165H Q25 HAT2165H L6 R47 0.50uH 0.002 1W D11 B320A R85 4S3- C47 1uF C48 22uF 6.3V 100K R86 100K R87 100K A A Linear Technology Corp. Title Size Date: 5 4 3 2 1630 McCarthy Blvd., Milpitas, CA 95035-7417 Phone: (408)432-1900 Fax: (408)434-0507 6-Phase 120A High Efficiency Power Supply Document Number Rev DEMO CIRCUIT 721A-A Friday, June 23, 2006 1 3 Sheet 2 of 3 5 4 3 2 1 VOUT+ D12 JP2 On 5.1V +12V C50 100pF TRIG1 C58 0.1uF C57 0.01uF 8 VDD 1 2 3 CW CCW 5 + 6 - R52 50K 3 GND OUT R48 390K SLOPE DOWN D13 BAT54S 3 4 CW 7 U3B LT1361CS8 2 1 (Opt) 3.9K 0805 C55 Q29 FMMT718 (Opt) IMAX ADJ. - R55 1K 485 R53 20K 2 + 1 - 6 3 Q27 SUD50N03-10 0.01uF COUT16 1uF Q28 SUD50N03-10 VOUT+ COUT18 100uF 7 U4 LT1210CR J8 LOAD STEP R56 R58 0.010 5% 2K C56 COUT17 1uF R59 0.010 5% R60 0.010 5% C59 -12V COUT19 100uF COUT20 100uF COUT21 100uF COUT22 100uF COUT23 100uF COUT24 100uF COUT26 100uF COUT27 100uF COUT28 100uF COUT29 100uF COUT30 100uF COUT31 100uF COUT33 100uF COUT34 100uF COUT35 100uF COUT36 100uF COUT37 100uF COUT38 100uF VOUT+ R61 0.010 5% COUT25 100uF TP11 0.1uF VOUT+ -12V PGND TP12 COUT32 100uF Dynamic Load Circuit C (Opt) Vout+ 4.7uF SLOPE UP COUT15 D 0.1uF C54 R50 R51 4 VR1 LT1004CS8-1.2 CCW + R57 50K 1 R54 1.5K U5 TLC555ID 2 TRIG 4 RSET 7 DSCH 6 THRES 5 CON (Opt) VOUT+ 4.7uF C52 Q26 FMMT619 U3A LT1361CS8 8 COUT14 C49 3 0.1uF C53 0.1uF TP10 R49 39K Off COUT13 22uF 1 2 C51 COUT12 22uF TP9 +12V CCW +5V CW D COUT11 22uF +12V DLC C +12V L7 10uH CMD4D08-100MC +5V U6 LT1930ES5 5 DLC BIAS JP3 On VIN 1 2 Off C64 1uF 4 1uF 1 SW FB SHDN B0540W-7 R62 115K 1% 3 3 C61 10pF +5V L8A 10uH S2275315 R64 13.3K 1% GND 2 C63 4.7uF R63 2K U7 LT1634BCMS8-1.25 6 4 C62 4.7uF D15 C60 1 VIN+ 2 PGND B 4 +5V R65 10.7K 1% L8B 10uH S2275315 5 C66 4.7uF 3 + D16 C67 0.1uF 3 R68 10K 1% B0540W-7 4 C65 0.1uF U8 LT1800CS5 1 - 1.10K 1% C68 2 -12V C69 R69 (Opt) ITH R66 B R67 (Opt) 100pF R70 1K (Opt) C70 R71 0 Ohm D17 VIN+ INT 5V 1 On 2 3 Off JP4 R72 U9 LT1616ES6 5 4 C73 1uF 16V 0805 VIN SW SHDN (Opt) CMDSH-3 BOOST 1 VOS+ +5V SELECT 1 JP5 R73 Int. 10 2 2 D18 B0530W-7 3 3 C74 10uF 16V R76 20K 1% 2200pF EAIN R74 (Opt) Ext. TP13 R75 C72 +5V A 6.65K 1% R88 (Opt) C71 L9 15uH 0.22uF A914BYW-150M 16V 6 GND FB 22pF DIFFOUT Optional External Reference and Compensation Circuit +5V C75 1uF 16V 0805 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. Linear Technology Corp. Title Size Date: 5 4 3 2 A 1630 McCarthy Blvd., Milpitas, CA 95035-7417 Phone: (408)432-1900 Fax: (408)434-0507 6-Phase 120A High Efficiency Power Supply Document Number Rev DEMO CIRCUIT 721A-A Friday, June 23, 2006 1 3 Sheet 3 of 3 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. +5V R21 10K TP7 D D PG +5V VR_HOTB C24 R23 (Opt) R22 1K TP8 +5V (Opt) R24 R89/*C26 R25 TBD 100K +5V C25 1K CLK1 U2 LTC3738CUHF R26 (Opt) R90/*C28 1K EAIN C30 VOS+ 330pF C R32 4S1+ 10 R29 R30 100 249 1% C34 1000pF 10 R35 4S2+ 10 C38 1000pF VIN+ SS VRON R36 R37 4S2- (Opt) 10 4S3- 10 R44 C42 1000pF 10K 1% R42 4S3+ ITH C40 0.01uF R40 C41 100pF C45 VR_HOTB PGOOD 33 2 PLLFLTR TSNS 15 BOOST1 32 TG1 31 SW1 30 FCB 6 EAIN 4 R34 4S1- 16 1 1000pF VOS- IN+ 3 IN- BG1 25 5 AVP BOOST2 29 7 SENSE1+ TG2 28 8 SENSE1- SW2 27 9 SENSE2+ VCC 26 10 SENSE2- PGND 24 11 SENSE3- BG2 23 12 SENSE3+ BG3 22 38 OUTEN SW3 21 13 SS TG3 20 14 ITH BOOST3 19 35 VID0 VID5 34 VID4 18 VID3 17 36 VID1 37 VID2 10 1uF 10V Q13 HAT2168H R27 C29 0 Ohm 0.22uF Q14 HAT2168H C27 10uF 4S1+ R31 C31 0 Ohm 0.22uF R33 C35 1uF 10V C36 4.7uF 1 OHM Q15 HAT2165H Q16 HAT2165H L4 R28 0.50uH 0.002 1W D8 B320A VOUT+ 4S1- C32 1uF C33 22uF 6.3V C +5V Q17 HAT2168H Q18 HAT2168H R38 C39 0 Ohm 0.22uF +5V C37 10uF 4S2+ L5 Q20 HAT2165H D9 Q21 HAT2165H 0.50uH 4S2- R39 0.002 1W D10 B320A BAT54W SGND +5V VIN+ D7 BAT54A-7 C43 1uF C44 22uF 6.3V 39 R81 +5V 100K R82 R77 10K 100K R83 B VRON 100K +5V TP2 0 R79 100K JP6 VRON 1 ON 2 GND VID S1 3 1 6 5 4 3 2 1 VRM SELECT 1 Q22 HAT2168H Q23 HAT2168H VRM9 B C46 10uF 2 B5 B4 B3 B2 B1 B0 4S3+ 3 VRM10 JP1 R84 100K +5V Q24 HAT2165H Q25 HAT2165H L6 R47 0.50uH 0.002 1W D11 B320A R85 4S3- C47 1uF C48 22uF 6.3V 100K R86 100K R87 100K A A Linear Technology Corp. Title Size Date: 5 4 3 2 1630 McCarthy Blvd., Milpitas, CA 95035-7417 Phone: (408)432-1900 Fax: (408)434-0507 3-Phase 65A High Efficiency Power Supply Document Number Rev DEMO CIRCUIT 721A-B Thursday, June 22, 2006 1 0 Sheet 1 of 3 5 4 3 2 1 VOUT+ D12 JP2 On 5.1V +12V C50 100pF TRIG1 C58 0.1uF C57 0.01uF 8 VDD 1 2 3 CW CCW 5 + 6 - R52 50K 3 GND OUT R48 390K SLOPE DOWN D13 BAT54S 3 4 CW 7 U3B LT1361CS8 2 1 (Opt) 3.9K 0805 C55 Q29 FMMT718 (Opt) IMAX ADJ. - R55 1K 485 R53 20K 2 + 1 - 6 3 Q27 SUD50N03-10 0.01uF COUT16 1uF Q28 SUD50N03-10 VOUT+ COUT18 100uF 7 U4 LT1210CR J8 LOAD STEP R56 R58 0.010 5% 2K C56 COUT17 1uF R59 0.010 5% R60 0.010 5% C59 -12V COUT19 100uF COUT20 100uF COUT21 100uF COUT22 100uF COUT23 100uF COUT24 100uF COUT26 100uF COUT27 100uF COUT28 100uF COUT29 100uF COUT30 100uF COUT31 100uF COUT33 100uF COUT34 100uF COUT35 100uF COUT36 100uF COUT37 100uF COUT38 100uF VOUT+ R61 0.010 5% COUT25 100uF TP11 0.1uF VOUT+ -12V PGND TP12 COUT32 100uF Dynamic Load Circuit C (Opt) Vout+ 4.7uF SLOPE UP COUT15 D 0.1uF C54 R50 R51 4 VR1 LT1004CS8-1.2 CCW + R57 50K 1 R54 1.5K U5 TLC555ID 2 TRIG 4 RSET 7 DSCH 6 THRES 5 CON (Opt) VOUT+ 4.7uF C52 Q26 FMMT619 U3A LT1361CS8 8 COUT14 C49 3 0.1uF C53 0.1uF TP10 R49 39K Off COUT13 22uF 1 2 C51 COUT12 22uF TP9 +12V CCW +5V CW D COUT11 22uF +12V DLC C +12V L7 10uH CMD4D08-100MC +5V U6 LT1930ES5 5 DLC BIAS JP3 On VIN 1 2 Off C64 1uF 4 1uF 1 SW FB SHDN B0540W-7 R62 115K 1% 3 3 C61 10pF +5V L8A 10uH S2275315 R64 13.3K 1% GND 2 C63 4.7uF R63 2K U7 LT1634BCMS8-1.25 6 4 C62 4.7uF D15 C60 1 VIN+ 2 PGND B 4 +5V R65 10.7K 1% L8B 10uH S2275315 5 C66 4.7uF 3 + D16 C67 0.1uF 3 R68 10K 1% B0540W-7 4 C65 0.1uF U8 LT1800CS5 1 - 1.10K 1% C68 2 -12V C69 R69 (Opt) ITH R66 B R67 (Opt) 100pF R70 1K (Opt) C70 R71 0 Ohm D17 VIN+ INT 5V 1 On 2 3 Off JP4 R72 U9 LT1616ES6 5 4 C73 1uF 16V 0805 VIN SW SHDN (Opt) CMDSH-3 BOOST 1 VOS+ +5V SELECT 1 JP5 R73 Int. 10 2 2 D18 B0530W-7 3 3 C74 10uF 16V R76 20K 1% 2200pF EAIN R74 (Opt) Ext. TP13 R75 C72 +5V A 6.65K 1% R88 (Opt) C71 L9 15uH 0.22uF A914BYW-150M 16V 6 GND FB 22pF DIFFOUT Optional External Reference and Compensation Circuit +5V C75 1uF 16V 0805 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. Linear Technology Corp. Title Size Date: 5 4 3 2 A 1630 McCarthy Blvd., Milpitas, CA 95035-7417 Phone: (408)432-1900 Fax: (408)434-0507 3-Phase 65A High Efficiency Power Supply Document Number Rev DEMO CIRCUIT 721A-B Thursday, June 22, 2006 1 0 Sheet 2 of 3 5 4 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 2 1 Do Not Populate for DC721A-B 3-Phase Design D D +5V C1 R1 3.40K 1% R41 R78 C76 0 Ohm (Opt) (Opt) 1uF 10V CLK1 VIN+ D1 BAT54A-7 U1 LTC3731CUH 1K 1% R3 C3 1000pF 0 Ohm EAIN 10 1S2+ 26 1 DIFF- 2 DIFFOUT SW1 25 BG1 20 BOOST2 24 DIFF+ 3 EAIN TG2 23 4 SENSE1+ SW2 22 5 SENSE1- +5V 21 6 SENSE2+ PGND 19 SENSE2- BG2 18 8 SENSE3- BG3 17 9 SENSE3+ SW3 16 C13 1000pF ITH C15 0.01uF C16 47pF 10 RUN/SS 11 ITH 12 UVADJ TG3 15 BOOST3 14 PHASMD/PG 13 SGND C17 1000pF UVADJ VIN+ 10 SS TP5 TG1 FCB 7 R13 ITH 27 10 10 TP3 BOOST1 R8 R11 1S3+ PLLFLTR 10 10 1S3- 30 VOS- C9 1000pF R9 1S2- 28 VOS+ R7 1S1- CLKOUT DIFFOUT R5 1S1+ PLLIN 32 C5 27pF C 29 31 VIN+ R16 R17 0 Ohm (Opt) 33 CIN1 10uF 16V C2 10uF CIN2 10uF 16V CIN3 10uF 16V CIN4 10uF 16V CIN5 10uF 16V CIN6 10uF 16V + L1 Q3 HAT2165H C6 VIN+ 8V to 14V J2 VIN- Q4 HAT2165H 0.50uH D2 B320A 1S1- R4 0.002 1W VOS+ C7 1uF 0.22uF TP1 C8 22uF 6.3V R6 VOS+ C VOUT+ +5V C10 1uF 10V J3 1 OHM C11 4.7uF J4 Q5 HAT2168H Q6 HAT2168H C12 10uF COUT1 + 330uF 2.5V C14 D3 +5V Q7 HAT2165H Q8 HAT2165H L2 R10 0.50uH 0.002 1W D4 B320A BAT54W 10K COUT2 + 330uF 2.5V COUT3 + 330uF 2.5V COUT4 VOUT+ VRM9.X/10.X@65A/120A COUT5 + 330uF + 330uF 2.5V 2.5V 1S2+ 0.22uF 357K 1% 1S2- C18 1uF C19 22uF 6.3V VOS+ R12 J5 10 VOUT+ C20 1uF TP4 PGND CIN7 270uF 16V OSCON 1S1+ 0.22uF R15 B Q2 HAT2168H C4 R14 R18 121K 1% J1 Q1 HAT2168H R2 Q9 HAT2168H Q10 HAT2168H R19 B C21 10uF 10 VOS1S3+ Q11 HAT2165H Q12 HAT2165H L3 R20 0.50uH 0.002 1W D6 B320A 1S3- C22 1uF J6 COUT6 + 330uF C23 22uF 6.3V 2.5V COUT7 + 330uF 2.5V COUT8 + 330uF 2.5V COUT9 COUT10 + 330uF + 330uF 2.5V 2.5V VOUT- J7 VOUT- TP6 VOS- VOS- A A Linear Technology Corp. Title Size Date: 5 4 3 2 1630 McCarthy Blvd., Milpitas, CA 95035-7417 Phone: (408)432-1900 Fax: (408)434-0507 3-Phase 65A High Efficiency Power Supply Document Number Rev DEMO CIRCUIT 721A-B Thursday, June 22, 2006 1 0 Sheet 3 of 3