5 4 3 PGOOD1 2 INTVCC TP1 TP2 1 EXTVCC TP3 R1 D Vout2 D (Opt) C1 + C24 39pF R2 68.1K 1% 3 0 R9 0 4 JP2 PLLIN/MODE CCM 1 R8 (Opt) C5 1000pF C7 R12 100pF 9.09K 1% TP8 PLLIN/MODE C8 100pF C9 10K 1000pF 2 3 JP4 RUN2 1 2 OFF C15 R17 78.7K 1% C16 3 470pF 100pF C17 R21 TP15 SGND JP5 TRACK1 SS1 1 2 TRACK 3 C22 0.1uF R25 35.7K 1% R26 11.5K 1% JP6 TRACK2 SS2 1 2 TRACK 3 TRACK1 1 ITH1 TRACK/SS1 28 2 VFB1 PGOOD1 27 TG1 26 SW1 25 BOOST1 24 SENSE1+ 4 SENSE1- 5 PLLLPF R19 0 C21 R24 39pF 0 L1 R6 2.2uH CDEP105-2R2M 0.012 1% TP4 VOUT1 Vout1 COUT1 + 150uF 10V C2 10uF 10V 3.3V@5A 4.7uF LTC3826EG-1 6 PLLIN/MODE BG1 23 7 SGND VIN 22 8 RUN1 PGND 21 9 RUN2 EXTVCC 20 10 SENSE2- INTVCC 19 11 SENSE2+ BG2 18 BOOST2 17 12 VFB2 13 ITH2 SW2 16 14 TRACK/SS2 TG2 15 TP6 GND C6 0.1uF * TP7 VIN 4.5V-32V R13 0 D1 Q2 Si7848DP CMDSH-4E R15 10 R16 C12 0 R18 D4 0 C18 0.1uF C10 10uF C TP9 GND D3 B140 C13 10uF 4.7uF 10V CMDSH-4E * 9Vin required for 8.5Vout regulation D2 B140 C11 0.1uF C14 Q3 Si7848DP 47uF 35V 1000pF 22.1K 1% R23 215K 1% B Q1 Si7848DP C3 3 680pF R14 JP3 RUN1 ON 1 ON R7 200K TRACK1 U1 3 OFF R10 0 C4 2 BURST C R4 + 250KHz 390KHz R3 215K 1% 4.7uF 10V + JP1 FREQ 1 530KHz 2 Q4 Si7848DP R20 0 L2 7.2uH CDEP105-7R2M R22 0.015 1% TP11 VOUT2 Vout2 [email protected] + COUT3 150uF 10V C20 10uF 10V B TP12 GND TP13 Track1 R27 Vout2 (Opt) C23 0.1uF R28 (Opt) TRACK2 TP14 Track2 R29 (Opt) CUSTOMER NOTICE A LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S 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 TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 CONTRACT NO. APPROVALS DRAWN DATE HELEN 3/09/07 CHECKED TECHNOLOGY TITLE A LTC3826EG-1 Wide Output Range Dual-Output Synchronous Step Down Supplies APPROVED ENGINEER 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 George Yu 3/09/07 DESIGNER Tuesday, October 02, 2007 2 SIZE CAGE CODE SCALE: FILENAME: DWG NO REV A DC1235A SHEET 1 1 OF 1