5 4 3 2 1 REVISION HISTORY USBVDD VDD VDD 1 0805 VDD D HI 3 LO JP2 SW6 MSD SW7 MSD RESET MSD 35 RESET 34 MSD TP19 RESET MID AUTO MID 33 13 VDD SD4 SD3 SD2 SD4 17 SD3 16 15 SD2 SD1 2 C Q1 G4 5 6 7 8 C36 0.22uF X7R 1 1 D9 S1B D10 S1B C47 0.22uF X7R D11 S1B C58 0.22uF X7R OUT1 TP1 PSMN075-100MSE RS2A RS2B RS2C RS2D C22 0.22uF X7R 2 D8 S1B 2 1 21 OUT 4 GATE 4 SENSE 4 20 TP10 2 G3 GATE4 24 OUT 3 GATE 3 SENSE 3 23 SENSE4 19 G2 GATE3 29 OUT 2 GATE 2 SENSE 2 OUT 1 GATE 1 SENSE 1 1.00 1.00 1 1.00 2 1.00 3 G1 SENSE3 22 C64 28 D1 31 2 RTN 1.00 1.00 1 1.00 2 1.00 3 Q2 D24 S1B OUT1 5 6 7 8 OUT2 TP2 VEE OUT2 Q3 5 6 7 8 OUT3 VEE TP3 Q4 5 6 7 8 OUT4 VEE TP4 OUT4 1 1.00 1.00 1 1.00 2 1.00 3 D26 S1B 2 4 PSMN075-100MSE RS4A RS4B RS4C RS4D OUT3 1 1.00 1.00 1 1.00 2 1.00 3 D25 S1B 2 4 PSMN075-100MSE RS3A RS3B RS3C RS3D B 1 RECOMMENDED MINIMUM CABLE SURGE PROTECTION MIDSPAN 1 VEE B LO 2 TP18 1uF 100V 1206 RS1A RS1B RS1C RS1D VEE VEE 1 GATE2 D18 SMCJ58A SMAJ58A SENSE2 27 C2 10uF 100V AGND_PIN 0805 R9 0 OPT 4 + R10 0 4 GATE1 J1 08-12-15 U1 LTC4266 SENSE1 30 RPW2 3.9K 1/4W 2 1 1 R35 10 VDD SDAOUT 7 6 AD0 5 AD1 4 AD2 AD3 10 DGND 39 D19 39V -54V A0 A1 A2 A3 VEE 3 2 ADDRESS HI 26 1 2 3 4 C65 0.1uF SDAIN AGND D5 VEE ORANGE SW1 LO 8 7 6 5 SCL 18 1 TP5 R11 0 SD1 37 1 SDAOUT RTN RTN 3 SDAIN 25 38 SCL INT A0 14 INT J2 DATE DILIAN R. 2 36 SW5 SD4 INT RED A1 1 AUTO D6 TP9 VEE TP8 2 TP7 32 SDAIN SDAOUT INT RESET TP31 D2 SMAJ5.0A SW4 SD3 1 SCL TP6 C SD1 SW3 SD2 RL1 300 TP17 DGND TP20 DGND VDD SW2 VEE RPW1 300 HI 3 1 VEE D7 VDD ORANGE APPROVED AUTO 2 VDD 2 D23 SMAJ5.0A C16 + 10uF 16V DESCRIPTION REBUILD WITH CHANGE JP4 C66 4.7uF 100V 1206 OPT 2 1 1 +3.3V D28 SMBJ64A OPT 2 +3.3V TP16 1 JP5 REV 2 1 3 EXT VDD D R36 10 2 +3.3V SOURCE 1 USB VDD 2 ECO SD4 SD3 SD2 SD1 AUTO PSMN075-100MSE 2 D27 S1B VEE CUSTOMER NOTICE A APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. TECHNOLOGY KIM T. DILIAN R. TITLE: SCHEMATIC IEEE802.3AT PoE QUAD PSE CONTROLLER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 2 N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: IC NO. LTC4266CUHF REV. 2 DEMO CIRCUIT 1366B Wednesday, August 12, 2015 1 SHEET 1 OF 3 A 5 4 3 2 J5A 8 8 7 7 5 5 4 4 ETH1-230LD 6 3 6 6 9 5 10 2 13 1 14 3 2 RJ45 - 4 PORTS A RJ45 - 4 PORTS J4A 1 PORT 1 2 1 R1N2 75 11 2kV 12 R1P2 75 3 C19 1000pF 4 D 1 T1 D R1P1 75 C20 0.01uF 200V R1N1 75 C27 0.01uF 200V C17 1000pF 2kV L1 BEAD OUT1 B RJ45 - 4 PORTS J4B J5B 8 8 7 7 5 5 4 4 ETH1-230LD 6 3 6 6 3 9 2 RJ45 - 4 PORTS L2 BEAD PORT 2 2 1 5 10 2 13 1 14 2kV R2N2 75 11 R2P2 75 12 C34 1000pF 3 IN FROM PHY 4 C 1 T2 C R2P1 75 C31 0.01uF 200V R2N1 75 C38 0.01uF 200V OUT TO PD C28 1000pF 2kV L3 BEAD RJ45 - 4 PORTS C OUT2 J5C 8 8 7 7 5 5 4 4 ETH1-230LD 6 3 6 6 9 5 10 2 13 1 14 3 PORT 3 R3P2 75 2kV R3N2 75 11 C40 1000pF 12 B 3 2 1 4 2 RJ45 - 4 PORTS L4 BEAD J4C 1 T3 B R3P1 75 C45 0.01uF 200V R3N1 75 C52 0.01uF 200V C42 1000pF 2kV L5 BEAD RJ45 - 4 PORTS D OUT3 8 7 7 5 5 4 4 ETH1-230LD 6 3 6 6 9 5 10 2 13 1 14 3 PORT 4 J5 SHIELD C49 1000pF TP15 2kV R4P2 75 R4N2 75 11 J4 SHIELD 12 A 3 2 1 4 2 CHASSIS GND J5D 8 RJ45 - 4 PORTS L6 BEAD J4D R4P1 R4N1 75 75 1 T4 A CUSTOMER NOTICE C56 0.01uF 200V APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. C53 1000pF 2kV C60 0.01uF 200V L7 BEAD 4 TITLE: SCHEMATIC IEEE802.3AT PoE QUAD PSE CONTROLLER SIZE L8 BEAD 5 TECHNOLOGY KIM T. DILIAN R. OUT4 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: IC NO. LTC4266CUHF REV. 2 DEMO CIRCUIT 1366B Wednesday, August 12, 2015 1 SHEET 2 OF 3 5 4 Q12 Si2343DS VDDP D 2 R22 1.1M 3 R24 300 3 1 2 OUT4 1% Q11 Si2343DS VDDP 2 R19 1.1M R21 300 3 1 2 Q10 Si2343DS 2 C R16 1.1M R18 300 3 1 D13 OUT2 Q9 Si2343DS 2 R6 1.1M R8 300 3 R7 18M 1 REP1 5.1K 2 4 5 6 7 8 9 10 11 12 13 14 REP2 5.1K REP3 5.1K 8 7 6 OUT2 1% VDDP 2 3 USBVDD SCL SDAIN C4 0.1uF GREEN R17 18M 1 1 OUT3 1% VDDP SDAOUT D GREEN R20 18M 1 D14 OUT3 1 J6 GREEN R23 18M 1 D15 OUT4 2 1 D12 OUT1 5 U3 24LC025 VCC A0 WP A1 SCL A2 SDA VSS 1 2 C 3 4 TP29 2 GREEN OUT1 1% OPTIONAL LED DRIVE QUICKEVAL FOR DEMO ONLY B B J7 VDD AUTO SD4 SD3 SD2 SD1 A1 A0 RX1 OPT RX2 OPT RX3 OPT RX4 OPT RX5 OPT RX6 OPT 1 3 5 7 9 11 13 15 OPT 2 4 6 8 10 12 14 16 DEMO PURPOSES ONLY CUSTOMER NOTICE A APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. TECHNOLOGY KIM T. DILIAN R. TITLE: SCHEMATIC IEEE802.3AT PoE QUAD PSE CONTROLLER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 2 N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: IC NO. LTC4266CUHF REV. 2 DEMO CIRCUIT 1366B Wednesday, August 12, 2015 1 SHEET 3 OF 3 A