5 4 3 2 1 VSYS R1 100k 0603 VIN E1 C15 0.1µF 50V C16 0.1µF 50V FB1 C7 4.7uF 50V 1206 C8 4.7µF 50V 1206 + C1 22µF 63V SUNCON 63CE22BS C2 4.7µF 50V 1206 C17 0.1µF 50V R2 100K 1 VIN 2 R8 E11 SYNC R22 100k C18 330pF 0603 R6 RCBL 100k R7 14.7k 0603 ISP RLIM ISN SYS 6 16 VOUT R3 NRS8040T100MJGJV C4 47µF 10V D2 MBRA340T3G 1210 0.022 1206 C9 OPT 10V 1206 C25 OPT 1210 VCABLE R4 E16 + C26 120uF 16V 11 USB5V VCABLE E15 0.3 2W 0830 GND C-GND R13 E14 OPT 1206 E17 SUNCON 16HVP120M E5 10 13 C13 C12 1µF 25V 0805 10nF R9 12 VCABLE 5V / 2.4A C11 E3 1µF 25V 0805 RT R10 174k 0603 R12 7.5k 0603 C3 1µF 16V L1 0805 10uH 15 E7 C_GND VOUT 5.xV / 2.4A C E9 GND 10k R14 OPT 17 GND E8 C19 1nF 0603 SW VC 8 R25 OPT 0603 SW D 14 RCBL 7 E4 BST SYNC 9 C U1 LT3697EMSE EN 5 EN E6 VSYS C10 5.xV / 0.1A 0.1µF E13 25V 0603 GND E12 VIN 3 OPT GND VSYS E10 GND E2 D1 CMDSH-3 4 VIN 8V - 35V FLT FLT L2 22µH NR8040T220M D X4 OPEN SET 3 1 VCABLE VSYS 1 3 Q1 ZXMN3A14F 1 B X1 OPEN D+ 3 1 J3 DATA+ OPEN C14 2.2nF 0603 R21 2 1206 1. ALL RESISTORS ARE 0402. ALL CAPACITORS ARE 0402. R24 2 1206 R18 49.9k 0603 R17 49.9k 0603 2 SHORT 3 1 1 2 1 3 2 4 3 4 USB X3 1 10k 0603 R15 43.2k 0603 2 DIV 5 R19 R16 43.2k 0603 2 1 V+ OUT GND SET 4 3 2 NOTES: UNLESS OTHERWISE SPECIFIED U2 LTC6900CS5 3 V+ B R20 2M 0603 VCABLE 2 R5 R23 18 18 2512 2512 2 3 X5 OPEN 2 DATA- OPEN DX2 CUSTOMER NOTICE A 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 2 TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC USB 35V, 2.5A BUCK WITH CABLE DROP COMPENSATION SIZE N/A DATE: IC NO. REV. LT3697EMSE DEMO CIRCUIT 1893A 3 SHEET Monday, September 08, 2014 1 1 OF 1 A