5 4 3 ON R1 2 Meg VIN C5 10uF/10V 2 OFF R21 10K JP1 E4 12 20 2 OFF JP2 R22 10K 11 EN3 14 PGND3 E7 VIN RUN_VOUT3 3 ON SW3 15 C8 20pF 8 21 B 744031002 C9 4.7uF,6.3V R13 2 Meg C11 20pF VIN SYNC / MODE 1 R23 10K E11 Burst 2 Pulse Skip 3 Sync VIN E13 R14 0 C10 1uF VOUT3 [email protected] E9 GND E10 R15 412K E12 R20 511K CUSTOMER NOTICE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 C PGOOD R18 1Meg 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. A GND E8 R10 232K B 4 SYNC C7 1uF R17 475K JP4 E16 R8 0 L3 2.5uH C12 1 VOUT2 [email protected] E6 R12 464K 0.1uF JP3 5 C6 4.7uF,6.3V 1 6 GND 744031002 2 OFF GND 7 FB2 FB3 L2 2.5uH 18 E15 VIN D R5 150K RT PGND2 SVIN C 1 SW2 EN2 PGOOD ON R6 2 Meg 10 3 FB1 9 RUN_VOUT2 OPT SW1 EN1 PGND1 GND E5 3 19 SGND 13 PVIN1 PVIN3 E14 VIN PRG_ VOUT3 C2 1uF R11 5 U1 LTC3569EUD VOUT1 [email protected] E3 R2 0 R4 187K 20pF R7 0 2 GND C3 PVIN2 PRG_VOUT1 GND C1 10uF,6.3V C4 VIN 10uF/10V MODE E2 PRG_VOUT2 7440430022 1 4 GND RUN_VOUT1 E1 17 D 1 L1 2.2uH 16 2.5V - 5.5V 2 VIN VIN VIN 3 3 CONTRACT NO. APPROVALS DATE DRAWN Antonina Karpova 10/10/07 CHECKED TECHNOLOGY TITLE DESIGNER Friday, October 10, 2008 TRIPLE DC/DC CONVERTER SIZE CAGE CODE SCALE: 2 A LTC3569EUD APPROVED ENGINEER Victor Khasiev 10/10/07 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 FILENAME: DWG NO REV DC1340A SHEET 1 3 1 OF 1