5 4 3 2 ECO REV DESCRIPTION DATE PROTO 4 D APPROVED 02/23/04 D VIN TP3 TP4 PGOOD1 TP5 C13 0.1uF VOUT1 VOUT1 TP1 1.8V @2.4A GND 25 Pgood3 21 Pgood1 12Good 16 5 BOOST1 Pgood2 9 0.22uF R8 13.7k 1% 33uF 6.3V 5Good 6 BOOST2 D3 SW1 4 SW1 SW2 TP9 R6 2.2k C1 R7 7.32k 1% 3300pF 8 FB1 7 Vc1 12 TP14 C2 23 11 Vc2 10 RUN/SS2 13 L3 22uH B VOUT3 TP12 -12V 240mA@5VIN 550mA@12VIN L4 22uH C12 10uF 16V C11 1uF 35V R10 133k 1% D5 B130 27 SW3 19 NFb BIAS1 15 BIAS2 28 VC3 18 TP7 D2 R9 13.7k 1% RUN/SS3 20 GND TP11 D4 UPS120 0.22uF TP2 VOUT2 R14 10.7k 1% C10 R13 2.49k 1% C 3.3V @1.4A 22uF 6.3V GND TP10 RUN/SS2 1500pF TP15 R15 0 C3 22nF R11 1.5k VIN R16 B OPT RUN/SS3 14 TP16 C4 FB3 12GOOD PGOOD2 VOUT2 L1 3.3uH C6 1000pF R12 10k PGOOD3 1500pF 26 TP13 CMDSH-3 C14 15pF GND VIN RUN/SS1 1500pF R3 100k TP6 C5 RUN/SS1 R2 130k C7 FB2 B220A VOUT2 24 LT1941EFE 3 VIN R1 100k 17 C8 L2 3.0uH C9 U1 VIN3 5GOOD R4 100k 2 R5 100k CMDSH-3 VIN2 D1 VOUT2 22 VOUT1 VIN1 TP8 GND CIN2 4.7uF 16V 1 CIN1 10uF 16V 4.7V to 14V VIN0 VIN C 1 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. UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL PER ASME Y14.5M -1994 A THIRD ANGLE PROJECTION CONTRACT NO. APPROVALS DRAWN MEI DATE 10/24/02 CHECKED TECHNOLOGY TITLE DC/DC CONVERTER ENGINEER SIZE CAGE CODE Custom DO NOT SCALE DRAWING 5 4 3 Monday, April 19, 2004 A SCH, LT1941EFE 1.1MHz TRIPLE OUTPUT APPROVED DESIGNER 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SCALE:NONE 2 DWG NO REV 4 DC621A FILENAME: 621A-4.DSN SHEET 1 1 OF 1