5 3 2 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 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 Applications Engineering for assistance. ECO 3 OPT 2 C3 2.2uF 50V VIN BOOST SHDN 7 5 SHDN SW GND GND 4 TP2 D3 C BOOST 1 D2 SDM10K45 C1 0.1uF L1 3 VOUT 22uH CDRH4D28-220NC FB VIN R1 100k APPROVED SDM10K45 OPT U1 LT1933HDCB C C4 33uF DATE 09/20/06 Q1 MMBT2222A 2 D4 CMHZ5231B OPT + DESCRIPTION PROTO D 1 VIN 4.5V-36V REV 2 R4 OPT TP1 1 REVISION HISTORY TP3 VOUT 3.3V@500mA C2 22uF 6.3V D1 MBRM140T3 6 D 4 R2 16.5k 1% B B R3 10.0k 1% TP5 GND TP4 GND CONTRACT NO. APPROVALS DATE DRAWN MI 03/31/06 CHECKED TECHNOLOGY TITLE SCH, LT1933HDCB, 36V 500kHz H-GRADE DFN STEP-DOWN REGULATOR APPROVED A ENGINEER A SIZE CAGE CODE DESIGNER DWG NO Monday, October 02, 2006 4 3 SCALE: NONE REV 2 DC1092A A 5 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 FILENAME: 1092A-2.DSN 2 SHEET OF 1 1 1