REVISION # REVISION HISTORY SD PC AD FD 0 0 0 0 2 1 DESCRIPTION DATE APPROVED 02/05/09 Fran Hoffart 1st Release Value Changed - C3,C4,C5. Added - C14 2 $$$ SD, ML & AD Rev Only $$$ BUCK INPUT 1 BUCK IN 2 PARALLEL 3 BOOST OUT 4 L1 3.3uH CDRH2D18/HP-3R3NC D1 JP1 E1 BUCK IN 1.8V - 5.5V + Sumida C1 (Opt) E2 VOUT BOOST 1.8V/3.3V/5V VOUT BOOST VOUT BOOST C2 (Opt) E11 GND 4.7uF 6.3V U1 LTC3100EUD E12 GND 1 SWBST E4 16 BOOST IN 0.65V - 5V + LDO C13 (Opt) ON VBST VNBST 2 12 R4 499K 1% 10 RUNLDO VLDO FBLDO 8 2 RUNBK JP3 6 BUCK SWBK 4 D2 (Opt) PGBK 1 E9 R8 60.4K 1% R5 R6 R7 90.9K 1% 137K 1% 14.0K 1% L2 2 3 15 4 JP4 BOOST PGD R3 715K 1% 11 3 OFF 5 6 5V C14 10uF 16V C3 10uF 16V R13 PGBST FBBK MODE GND GND 13 7 17 9 GND 1 2 1.5V 3 4 2.85V 5 6 3V C8 2.2uF VOUT BUCK C12 10pF 1 2 1.2V 3 4 1.5V 5 6 1.8V VOUT BOOST E5 VOUT LDO 1.5V/2.85V/3V 100mA C9 1uF 16V GND E6 JP6 VOUT BUCK 4.7uH SD3110-4R7-R COOPER Bussmann C4 4.7uF 10V E3 VOUT LDO RUNBST 1 ON R2 619K 1% C7 33pF BOOST SEQ 3.3V VOUT LDO 14 JP2 ON R1 249K 1% 3 4 OFF 1.8V 4 JP5 VNBK FBBST 3 OFF C5 68pF 2 3 5 C6 2.2uF 1 SEQ 2 1 C10 10uF 6.3V E7 VOUT BUCK 1.2V/1.5V/1.8V 250mA C11 1uF 16V GND E8 JP7 100K E10 R14 BUCK PGD 100K VOUT BUCK R12 499K 1% R9 R10 499K 1% 249K 1% R11 249K 1% MODE 1 BURST 2 3 PWM JP8 APPROVALS 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. LINEAR TECHNOLOGY CORPORATION APPROVED: 1630 McCARTHY BLVD www.linear.com MILPITAS, CA. 95035 LTC Confidential (408)432-1900 For Customer Use Only (408)434-0507 (FAX) Title LTC3100EUD, Synchronous Step-Up and Step-Down Converters and LDO Regulator CHECKED: SD DRAWN: Rudy Bautista ENGINEER: Fran Hoffart Date: Friday, February 13, 2009 Document Number Rev Demo Circuit 1326A C:\ORCADWIN\CAPTURE\1326A\1326A_00_REV2.DSN Sheet 2 1 of 1