5 3 2 U1* Vin 2.7V-5.5V 4 Vin E1 Cin 4.7uF 6.3V GND 1 E3 D * Vout 600mA E2 (max) 2.2uH Vfb** 5 JP1 2 ON OFF 1 L1 SW 3 3 D 4 1 RUN Cout 10uF 6.3V GND 2 R1 4.7M Rfb1 * Cffw * *** *** GND C C E5 Rfb2 * *** GND E4 GND * VERSION TABLE Assembly Type B E6 U1 DC500A-A LTC3406ES5 DC500A-B DC500A-C LTC3406ES5-1.5 LTC3406ES5-1.8 DC500A-D LTC3406BES5 DC500A-E LTC3406BES5-1.5 LTC3406BES5-1.8 DC500A-F ** Vout Rfb1 Rfb2 Cffw ADJ(1.2V) 301K 1.5V 0 301K ___ 22pF ___ 1.8V ___ ___ ADJ(1.2V) 0 301K 1.5V 0 301K ___ 22pF ___ 1.8V 0 ___ ___ B Pin 5 is Vout for the fixed voltage versions of the LTC3406. CONTRACT NO. *** For the fixed voltage versions of the DC500A, Rfb1 is a zero ohm resistor (jumper), and Rfb2 and Cffw are unstuffed. APPROVALS DRAWN June Wu DATE 2/1/02 TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 TITLE CHECKED A A APPROVED ENGINEER LTC3406, High Efficiency, ThinSOT Tom Gross DESIGNER Friday, May 03, 2002 5 4 3 2/1/02 SIZE CAGE CODE TM Synchronous Buck Regulator DWG NO REV DC500A SCALE: FILENAME: 2 A SHEET 1 1 OF 1