5 4 3 2 1 REVISION HISTORY ECO REV __ 1 DESCRIPTION PRODUCTION APPROVED DATE VICTOR K. 07-13-11 D D VIN E1 E3 VIN VOUT 3.3V / 1A 1.8V - 5.5V + C6 OPT C1 10uF 10V 0805 E2 C2 1uF 10V 0603 L1 XFL4020 - 472 4.7uH GND U1 LTC3536EMSE R6 R5 8 100k OPT E5 9 3 SYNC 1 E6 2 SW1 SW2 VIN VOUT VIN FB MODE/SYNC VC RT SGND C4 1uF 10V 0603 E4 GND SHDN PGND 6 C 7 11 12 R4 C7 49.9K 220pF 10 R2 220K 1% 5 C8 OPT 13 GND C9 OPT 1206 R3 6.49K PGND 4 C C3 22uF 6.3V 1206 R1 1 Meg 1% C5 47pF VIN MODE BURST MODE FIXED FREQ B 1 2 3 JP1 R8 1 Meg B VIN RUN ON OFF 1 2 3 R7 1 Meg JP2 CUSTOMER NOTICE 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 APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS AND CAPACITORS ARE 0402. 2. INSTALL SHUNTS AS SHOWN. TECHNOLOGY LT 4 3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only VICTOR K. TITLE: SCHEMATIC 1A, LOW NOISE, BUCK-BOOST REGULATOR SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 APPROVALS IC NO. N/A SCALE = NONE 2 DATE: REV. LTC3536EMSE DEMO CIRCUIT 1852A 07-13-11 1 SHEET 1 1 OF 1 A