5 4 3 2 1 REVI SION HISTORY LTC CONFIDENTIAL - For Customer Use Only ECO REV 0 DESCRIPTION B DATE PRODUCTION RELEASE 12-19-01 APPROVED > VIN D D VIN TP1 PVcc2 R17 TP6 PVcc2 1 [1] D3 PVcc1 MBR0520LT1 C10 10uF 16V D5 C11 10uF 16V C12 10uF 16V 3.1V-8V C14 + 220uF 10V 7343 TANT 2 0 D4 C13 10uF 16V TP4 GND [1] 5 6 7 8 5 6 7 8 Q1 Q2 OPTION D2 MMSZ5242B C6 1uF 16V 14 C3 C1 2.2uF 10V 9 VCC C8 0.1uF 16V C9 [1] 1 2 3 1 2 3 2 PVcc1 U1 C SS IFB G2 FREQSET 130K RUN G1 IMAX 0.01uF R3 11 TP3 C7 0.1uF 16V [1] 4 Vcc 15 R1 10 4 R4 12K PVcc2 R15 1K Si7892DP 8 PGND GND SHDN C 1 G1 L1 12 R5 VOUT 13 16 SHEET 2 Vo TP2 1K 5 6 7 8 Q3 5 6 7 8 1.3uH Q4 OPTION 3 4 Si7892DP 4 4 D1 B320A C15 + [1] OPT. 7343H [1] C16 + 180uF 4V 7343H C17 C18 + [1] + [1] OPT. OPT. 7343H 7343H 2.5V/1.8V/1.5V C19 10uF 16V @12A COMP R2 18.2K SEE NOTE: [2] LTC3832EGN SENSE+ FB 7 6 1 2 3 1 2 3 R6 9.53K 1% 5 10 150pF SENSE- C4 C5 3300pF C21 470pF JP1 R8 16.5K 1% JP2 R9 8.66K 1% JP3 1.8V B C20 [1] 1.5V R7 3.01K 1% B TP7 GND G2 UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL PER ASME Y14.5M -1994 NOTES: UNLESS OTHERWISE SPECIFIED, [1] C9,C15,C17,C18,C20,D4,D5,Q2,Q4 OPTIONAL - DO NOT STUFF. A [2] DC469B-A: COMPONENTS INSIDE DOTTED FRAME SHEET 1. DC479B-B: COMPONENTS ON SHEET 2 INSTEAD. THIRD ANGLE PROJECTION CONTRACT NO. APPROVALS DRAWN MEI DATE 12-19-01 CHECKED TECHNOLOGY TITLE A STEP-DOWN POWER SUPPLY ENGINEER SIZE CAGE CODE DESIGNER B DO NOT SCALE DRAWING 4 3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SCH,LTC3832EGN/-1ES8 HIGH EFFICIENCY APPROVED 5 SHEET 2 Wednesday, September 11, 2002 2 SCALE:NONE DWG NO REV B DC469B FILENAME: 469B-1.DSN SHEET 1 1 OF 2