5 4 3 2 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. ECO REV DESCRIPTION DATE PROTO 1 APPROVED 01/26/06 Q1 R1 +12VIN 8 7 6 5 12VOUT1 Si7336ADP 3 2 1 E26 12VOUT1 8m 5.5A 4 C1 4.7uF X7R 10V VCC E17 3 2 1 PRSNT11 JP7 R36 390 4 HIGH 1 2 EXT 3 4 LOW 5 6 J1 (A1) 7 R6 10 RG2 18 CG2 8 R9 390 ON1 AUXPGOOD1 3 4 EXT 5 6 LOW 1 2 HIGH 3 4 EXT AUXON1 LOW 3VOUT1 2 3VGATE1 3 3VSENSE1 4 3VIN1 5 AUXIN1 6 8 3VIN2 9 3VSENSE2 10 3VGATE2 11 3VOUT2 12 HIGH 4 EXT 5 6 LOW GND EN2 33 34 E10 1 1 1 PGOOD1 AUX PGOOD1 E22 GND AUXPGOOD2 E35 PGOOD2 E25 AUX PGOOD2 PGOOD2 AUXFAULT2 E24 AUX FAULT2 FAULT2 E23 FAULT2 32 AUXPGOOD1 PGOOD1 36 37 38 35 FAULT1 AUXFAULT1 EN1 E34 12VOUT2 3VIN2 12VGATE2 3VSENSE2 12VSENSE2 3VGATE2 12VIN2 AUXPGOOD2 12VIN1 30 12VSENSE1 29 12VGATE1 28 12VOUT1 27 AUXOUT1 12VOUT1 R14 390 25 AUXOUT2 24 12VOUT2 23 12VGATE2 22 12VSENSE2 21 12VIN2 D6 GRN D13 GRN 1 26 R17 390 2 1 2 20 6 LOW R19 10K ON2 FON2 2 JP6 1 2 HIGH 3 4 EXT 5 6 LOW CD2 1 EN2 0.033uF R23 10K RD2 47K D10 D11 D12 D17 RED RED GRN GRN R20 VCC E18 1 2 EXT 3 4 LOW 5 6 J1 (A1) 7 8 R21 R22 390 390 RG4 18 1 R26 390 5 6 7 8 13m B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 B15 B16 B17 B18 E32 3.3VAUXOUT2 375mA 3.3VOUT2 1 2 3 R27 390 Q4 Si7336ADP R7 10 RG3 47 CG3 15nF 2 D14 GRN 1 1 D3 GRN 12VOUT2 12VOUT2 4 R3 1 +12VIN A Z3 8m R31 3.3K SMAJ15A 5 6 7 8 E31 5.5A 1 2 3 E33 R32 3.3K Q3 3.3VOUT2 3A GND A 1 1 2 Si7336ADP 2 D15 GRN 2 D2 GRN UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL PER ASME Y14.5M -1994 THIRD ANGLE PROJECTION CONTRACT NO. APPROVALS DATE DRAWN MEI CHECKED TECHNOLOGY TITLE APPROVED ENGINEER DESIGNER DO NOT SCALE DRAWING 5 PRSNT12 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 E30 2 E14 2 GND 1 2 SMAJ7.0A 390 J2 CG4 47nF 4 Z2 R34 X1 PCIe CH2 R5 10 R4 +3.3VIN B 12VOUT2 2 PRSNT12 390 VPU JP8 HIGH 2 EXT 2 HIGH 4 C 12VOUT2 1 E9 E19 1 FON2 AUX FAULT1 1 2 3 VCC FAULT1 E20 2 1 5 B D16 GRN E21 2 E8 3A D9 GRN AUXON2 JP5 VCC ON2 R18 10K AUXOUT2 AUXIN2 AUXON2 2 3 VCC 13 1 2 JP4 VCC E7 GRN GND 3VOUT2 D8 RED GND 1 D1 AUXON2 D7 RED 31 39 AUXIN2 2 AUXIN Z1 SMAJ7.0A AUXOUT1 AUXIN1 PGOOD2 7 VCC R16 390 FON1 ON1 LOW 3VIN1 19 6 1 5 E5 12VOUT1 AUXFAULT2 EXT 12VGATE1 18 4 12VSENSE1 FAULT2 3 3VOUT1 3VSENSE1 17 HIGH 12VIN1 3VGATE1 EN2 2 AUXON1 16 1 R15 10K 1 ON2 6 JP3 R13 10K FON2 5 E4 U1 LTC4242CUHF JP2 E27 2 PGOOD1 15 E3 R33 390 2 FON1 2 VCC 3.3V AUX INPUT 1 AUXFALUT1 0.033uF R12 10K R11 390 2 HIGH R10 390 3.3VOUT1 FAULT1 EN1 1 1 VCC AUXON1 GRN 2 E2 C 375mA D5 PRSNT11 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 2 JP1 VCC ON1 3.3VAUXOUT1 VPU RD1 47K CD1 2 FON1 E28 47nF E1 14 GND 1 3.3VOUT1 13m 2 EN1 R2 +3.3VIN E13 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 B15 B16 B17 B18 D4 GRN Si7336ADP 8 7 6 5 1 GND E11 X1 PCIe CH1 GND J1 Q2 1 +3.3VIN 15nF 2 4 +3.3VIN 12VOUT1 D E29 CG1 2 3 VPU RG1 47 1 2 R8 10 1 +3.3VIN 1 VCC R35 33 2 +3.3V AUX INPUT AUXIN JP9 1 VPU VCC D R37 3.3K 1 +12VIN E15 4 3 2 Thursday, December 07, 2006 SIZE 1630 McCarthyBlvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SCH, LTC4242CUHF, PCI EXPRESS HOT SWAP CONTROLLER CAGE CODE 01/26/06 SCALE: NONE DWG NO FILENAME: 1054A-1.DSN 1 REV DC1054A SHEET 1 1 OF 1