A 4 B C D E REVISION HISTORY 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. ECO REV DESCRIPTION 0 1st PROTOTYPE DATE APPROVED <DATE> <APPROVED> 4 U1 LTC3564ES5 E1 VIN 2.5V - 5.5V L1 3 + E2 GND * CIN1 22uF CIN 22uF 6.3V 1206 5 E6 GND 3 VIN SW RUN VFB E3 4 2.2uH CDRH2D18/HP-2R2NC Sumida 1 COUT 22uF 6.3V 1206 E4 GND GND JP5 2 USER SELECT RFB1 402K 1% 3 JP2 1 1.2V 2 3 JP3 RSD 1.0M JP1 GND (Opt) CFFW VOUT OFF E5 RFB6 22pF ON VOUT 1.25A(max) COUT1 0.1uF 1.5V 2 RFB2 402K 1% RFB3 200K 1% RFB4 200K 1% 2 JP4 1.8V RFB5 0 * 1 APPROVALS CIN1 IS AN OPTIONAL CAPACITOR. IT IS INSERTED ON THE DC1158A TO DAMPEN THE (POSSIBLE) RINGING VOLTAGE DUE TO THE LONG INPUT LEADS. ON A NORMAL, TYPICAL PCB, WITH SHORT TRACES, THE CAPACITOR IS NOT NEEDED. APPROVED: 1630 McCARTHY BLVD www.linear.com MILPITAS, CA. 95035 LTC Confidential (408)432-1900 For Customer Use Only (408)434-0507 (FAX) Title: LTC3564ES5 Monolithic Synchronous Buck Regulator CHECKED: SD DRAWN: Rudy Bautista ENGINEER: Date: A B C LINEAR TECHNOLOGY CORPORATION Tom Gross Document Number C:\ORCADWIN\CAPTURE\1158A\1158A_REV1.DSN Thursday, September 04, 2008 D Rev Demo Circuit 1158A Sheet E 1 1 of 1 1