5 4 3 2 1 REVISION HISTORY * R1 1 Ohm C1 RUN1 RSD 1.0M CIN6 VIN 47uF 6.3V 4 5 SW1 6 7 SVIN BURST VOUT 2 4 PULSE SKIP 6 FORCED CONTINUOUS C MODE 8 1 9 3 MODE 5 10 JP7 TP9 CLKIN 11 12 2 ITHM PVIN U1 LTC3415EUHF SW SW SW SW SW SW SW SW MODE PGOOD CLKIN BSEL PHMODE 13 3 5 C9 100pF (Opt) VIN 27 CIN4 47uF 6.3V 26 25 RFB1 R4 10K 23 22 21 1 BSEL 3 9 10 MODE 11 SVIN PHMODE2 12 3 C5 47pF R8 1 Ohm 2 4 6 100K 22pF 20K 1% RFB3 1.5V 15K 1% RFB4 1.8V JP3 C JP4 TP10 PGOOD SVIN VOUT 10% 15% 5% SW MODE PGOOD CLKIN BSEL PHMODE MGN 2 4 5 6 SVIN VOUT MGN+ NOMGN MGN- JP10 C8 0.1uF L2 B 0.20uH R9 IHLP-2525CZ-01 0.20uH 0 Ohm VISHAY ITH SW MGN 3 ITH 32 33 ITHM 35 34 SVIN PVIN PVIN 36 RUN SW 13 5 SW SW PGND 1 SW SW PGND 8 U2 LTC3415EUHF PGND 7 PVIN SW R11 CFF 31 COUT4 100uF 6.3V 28 VIN 27 CIN9 47uF 6.3V 26 25 24 R6 10K (Opt) 23 22 21 20 A APPROVALS 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. 4 COUT6 (Opt) FB2 29 JP12 5 COUT5 100uF 6.3V 30 19 6 PVIN PVIN 18 SW2 PVIN PGND 5 17 4 FB PGND 47uF 6.3V VIN PLLLPF PGND C7 39pF CIN8 NC 16 10K C6 100pF 1 SW2 TRACK PGND 3 JP1 30.1K 1% (Opt) USER SELECT 20 (Opt) SGND 15 R5 NC 37 38 2 14 1 TP8 TRACK SVIN 29.4K 1.2V 1% PbF JP2 RFB2 24 SVIN2 CLKOUT B TP7 GND R3 FB1 28 RITH2 10K 47uF 6.3V 10K TP11 CLKOUT2 2 PHASE VOUT 2 4 4 PHASE 6 3 PHASE 29 CITH2 1000pF (Opt) CIN7 RUN2 COUT3 (Opt) JP8 VIN R7 COUT2 100uF 6.3V 30 ITHM RUN1 COUT1 100uF 6.3V 31 5 JP9 A MGN TP4 ITH TP6 VOUT 1.2V/1.5V/1.8V@15A VOUT L1 ITH SVIN 34 35 36 PVIN PVIN PVIN PVIN 1 2 PHASE VOUT 4 4 PHASE 6 3 PHASE 37 PVIN PGND SVIN PHMODE1 FB PGND C4 39pF ITH 0.20uH IHLP-2525CZ-01 0.20uH VISHAY TRACK APPROVED <APPROVED> ! D SW1 PLLLPF PGND 10K C3 100pF SGND PGND 3 DATE <ECO#> 0 R10 0 Ohm C2 47pF RITH1 10K NC PGND 2 JP6 R2 NC 16 1 5 RUN 3 PGND FREE RUN 4 6 -30% 1 15 PLLLPF CLKOUT 2 14 SVIN +30% 38 47uF 6.3V TP5 CLKOUT1 DESCRIPTION TP3 ITHM CITH1 1000pF CIN5 17 TP12 SGND SVIN 3 OFF REV 0.1uF 2 32 JP5 Vout Enable 1 ON 33 CINA 68uF 10V ITHM + PGND CIN3 (Opt) ON THE DC768A TO DAMPEN THE (POSSIBLE) RINGING VOLTAGE DUE TO THE LONG INPUT LEADS. ON A NORMAL, TYPICAL PCB, WITH SHORT TRACES, CINA IS NOT NEEDED. 19 CIN2 100uF 6.3V 18 CIN1 100uF 6.3V TP2 GND TP13 GND D *CINA IS AN OPTIONAL CAPACITOR. IT IS INSERTED VIN TP1 VIN 2.5V to 5.5V ECO 3 2 DRAWN: Rudy Bautista ENGINEER: Tom Gross APPROVED: Title Size CHECKED: DCxxxA_00.PCB 1630 McCARTHY BLVD MILPITAS, CA. 95035 (408)432-1900 (408)434-0507 (FAX) xxxA_x.DSN www.linear.com LTC Confidential For Customer Use Only Dual Phase 15A Monolithic Synchronous Buck Converter Document Number Rev 3 Date: Sheet 1 1 of 1