5 4 3 2 1 REVISION HISTORY ECO REV DESCRIPTION 0 DATE APPROVED 1st PROTOTYPE D D U1 LT3085EDCB VIN 1.7V - 25V * C VCONTROL 2.8V - 25V * E4 E1 6 CIN ** + 10uF 35V 10% C1 1uF 35V 5 E2 4 C2 1uF 35V IN OUT IN OUT VCONTROL OUT 1 2 VOUT 0.5A MAX C3 4.7uF 10V 10% E5 GND 7 C SET 3 E3 GND C4 0.01uF B 1.2V R1 4 1.8V 121K 1% 5 6 2.5V R3 7 8 3.3V 9 10 5.0V 1 2 3 12 USER SELECT 11 R2 182K 1% R4 249K 1% R5 332K A This circuit is proprietary to Linear Technology and supplied for use with Linear Technology parts. Customer Notice: Linear Technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customers 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 Applications Engineering for assistance. 5 4 APPROVALS DRAWN: Rudy Bautista ENGINEER: Tiger Zhou (Opt) LINEAR TECHNOLOGY CORPORATION 1630 McCARTHY BLVD MILPITAS, CA. 95035 (408)432-1900 (408)434-0507 (FAX) Title LT3085EDCB APPROVED: CHECKED: Date: Thursday, August 14, 2008 3 B R6 499K 1% JP1 * SEE QSG FOR DETAILS. ** CIN IS OPTIONAL, FOR VIN DAMPING PURPOSE ONLY. 1% SD LTC Confidential For Customer Use Only A Adjustable Single Resistor LDO Regulator Document Number Rev DEMO CIRCUIT 1401A C:\ORCADWIN\CAPTURE\1401A\1401A_REV0.DSN 2 www.linear.com Sheet 1 1 of 0 1