Schematic for the MC34063 Boost SMD Demonstration Board h 9/9/2003 MC34063 Evaluation Board Design Example Boost Regulator (3.3V to 12V@50mA/180mA)(SMD) R401, Prov. R402, Prov. R403, Prov. P401 Vin (+3.3V) Gnd L402 Prov. L401 Prov. R404 100 8 Drive Collector Switch Collector 1 7 Switch Emitter 2 Ipk Sense 6 Vcc Timing Cap. 3 5 Feedback C401 100uF 16V C402 0.1uF D401 MBRS140 R408 (Prov.) Ground 4 C403 680pF IC401 MC34063AD FB401 (Prov. for SMFB) Q401 (Prov.) R409 (Prov.) C404 100uF 16V C407 Prov. R406 21.5K, 1% R407 2.49K, 1% Q401 Low Current Applications Out PZT651 High Current Applications SOT-223 Style 1 L401 C407 R401 R402 R403 P402 Vout (+12V) R405 (Prov. for 0 ohm 805) R408 R409 100uH Out 1.0 1.5 1.5 Out "0" ohm resistor 47uH 100uF 0.1 Out Out "0" ohm resistor 470 C405 Prov. C406 0.1uF Gnd