5 4 3 2 1 REVISION HISTORY ECO REV DESCRIPTION APPROVED DATE - 2 PRODUCTION FAB GEORGE B. 10 - 5 - 15 E1 VIN 4.5 - 5.5 V 0.5A C2 100uF 6.3V 1206 D1 R2 2.2k C1 4.7uF 6.3V J1 USB Micro B RECEPTACLE TE, 1932788-1 ID D+ DGND CTx1 CTx2 33nF 1nF 25V 0603 1206/0805 1 4 3 2 1 4 5 7 6 GND GND C 315kHz 2 3 OE U1 LTC6990IDCB LTx 7.5µH +/-10% C V+ DIV OUT M1 244kHz 6 1 SET Si2312CDS 2 VBUS D 3 D GNDGND R1 205k 5 7 E2 GND B B UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V CUSTOMER NOTICE 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. A TECHNOLOGY NC GEORGE B. TITLE: SCHEMATIC 5 4 N/A SCALE = NONE 3 A SINGLE SWITCH TRANSMITTER FOR LTC4123EDC SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 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. REV. LTC4123EDC DEMO CIRCUIT2301A 10 - 5 - 15 2 2 SHEET 1 1 OF 1