A B C D E NOTES: Vin L1 4.7uH A915AY-4R7M 2V - 5V C1 4.7uF, 6.3V X5R 2 R9 1K 3 Off SHDN 4 SHDN 3 SYNC 8 COMP 13 5V * GND U1 LTC3458LEDE JP1 Output On E3 Vout 1 C9 ** 47uF, 10V TANT 1 Gnd 4 SW + 2 E1 VIN 4 UNLESS OTHERWISE SPECIFIED VOUT Center Pad FB 12 R2 665K 1% C2 27pF NPO C3 22uF, 6.3V X5R E2 C4 0.1uF 7 3 3 R8 100K 1% R4 33.2K 1% R1 1M 1% C7 10pF NPO Gnd C5 0.01uF X7R GND R10 51K 9 ILIM 5 R5 200K 1% 11 R6 84.5K 1% R7 133K 1% C6 0.01uF, 16V X7R R3 215K 1% 1 E5 6 10 Sync RT SS E4 BURST C8 470pF NPO Fixed Freq. 2 Burst Mode 3 2 JP2 Mode Selector 2 Auto On 4 E6 ** C9 Used Only When Operating Supply With Long Inductive Input Leads. * Vin 1 2V 300mA 2.7V 450mA 3.3V 650mA 4.2V 900mA A LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY Iout at 5V Customer Notice Linear Technology Has Made A Best Effort To Design A Circuit That Meets Customer-Supplied Specifications; However, It Remains The Customer's 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 Technology Applications Engineering For Assistance. This Circuit Is Proprietary To Linear Technology And Supplied For Use With Linear Technology Parts. B C LINEAR TECHNOLOGY CORPORATION 1630 McCARTHY BLVD. MILPITAS, CA. 95035 408-432-1900 408-434-0507 FAX Title 1 1MHz Synchronous Step-Up DC/DC Converter Size Document Number Date: Wednesday, July 13, 2005 Demo Circuit 878A D Sheet LTC3458LEDE 1 E of 1 Rev