5 4 3 2 1 REVISION HISTORY ECO REV DESCRIPTION APPROVED DATE __ 2 PRODUCTION FAB VICTOR K. 04-11-11 D D E1 VIN E3 VIN 1.8V - 5.5V E2 GND U1 C R5 OPT E5 R6 100k E6 LTC3536EDD VIN MODE 1 BURST MODE 2 3 FIXED FREQ JP1 SW2 5 7 VIN VOUT 6 3 MODE/SYNC FB 9 1 RT VC 10 SHDN 8 C R4 C7 49.9K 220pF R2 220K 1% C8 OPT VIN RUN ON R8 1 Meg OFF B 1 2 3 JP2 R7 1 Meg 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 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. A NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE 0402 AND CAPACITORS ARE 0603. 2. INSTALL SHUNTS AS SHOWN. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 E4 R3 6.49K GND B C4 1uF 10V GND 4 SW1 2 SGND SYNC C3 22uF 6.3V R1 1 Meg 1% C5 47pF L1 XFL4020 - 472 4.7uH PGND C1 10uF 10V 11 C6 OPT + VOUT 3.3V / 1A C2 1uF 10V 4 3 APPROVALS TECHNOLOGY PCB DES. NC APP ENG. VICTOR K. TITLE: SCHEMATIC SIZE N/A SCALE = NONE 2 DATE: IC NO. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 1A LOW NOISE, WIDE VIN BUCK-BOOST DC / DC CONVERTER LTC3536EDD DEMO CIRCUIT 1797A 04-11-11 SHEET 1 1 REV. 2 OF 1 A