5 4 3 2 1 U1 LTC3252EDE OUT2 4 C1 1.0uF D 6 C2+ 8 C2- 3 E3 OUT1 4.7uF C3 0.47uF 11 EN2 2 EN1 EN2 5 1.5V GND E2 RA1 475K 1% IN FB1 CIN 10uF C5 1uF 12 D COUT2 VOUT1 VIN * Vmin to 5.5V FB2 RA2 261K 1% RB2 511K 1% 10 C2 1.0uF C C1+ C1- VOUT2 1.2V E1 * Iout2 9 1 COUT1 4.7uF * Iout1 C4 0.47uF C RB1 536K 1% 7 E6 Vout2 Enable GND E4 * A Vmin * Iout1 * JP1 ON OFF 2 3 B JP2 ON OFF Vout1 Enable REN2 10M 3 E7 GND 1 1 EN1 E5 2 REN1 B 10M CONTRACT NO. Iout2 3.5V 250mA 250mA 3.2V 100mA 250mA DRAWN 3.1V 50MA 250mA CHECKED APPROVED 2.9V ---- 250mA 2.7V ---- 150mA APPROVALS ENGINEER DATE June Wu 9/25/02 TECHNOLOGY TITLE LTC3252EDE, Dual, Spread-Spectrum, Low Noise, Inductorless, Bill Walter 9/25/02 SIZE CAGE CODE DESIGNER DWG NO REV A DC611A Thursday, February 20, 2003 4 A Step Down DC/DC Converter VOUT1 in dropout below 3V 5 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 3 SCALE: FILENAME: 2 SHEET OF 1 1 1