5 4 3 2 1 U1 LT3048EDC VIN 2.7V - 4.8V 2 E1 BSTOUT WE 74404024220 SW L1 22uH C1 4.7uF 50V 1206 8 1 D BYP D 4 C3 1nF VIN LDOOUT 6 E2 7 EN 3 B E4 5 GND 2 GND E3 RUN ON OFF 1 GND FB C5 1uF 25V C4 1uF 25V * GND C R2 66.5K 9 C R1 1M 3 C2 4.7uF 25V 0805 JP1 VOUT 20V * Vin (V) Iout (mA) 2.7 15 NOTE: UNLESS OTHERWISE SPECIFIED 3.3 18 1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603. 3.6 20 4.8 28 CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. B 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only LOW NOISE ADJUSTABLE BIAS GENERATOR A SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 N/A DATE: IC NO. A REV. LT3048EDC DEMO CIRCUIT 2258A 2 Wednesday, May 20, 2015 SHEET 2 1 1 OF 1