MC34063 Evaluation Board Design Example Voltage Inverting Regulator 5V to -12V@50mA(SMD) IC201 MC34063 Vin (+5V) Gnd C201 100uF 16V R201, 1.0 R202, 1.5 5 Feedback Ground 4 6 Vcc 7 Ipk Sense Timing Cap. 3 C203 470pF Switch Emitter 2 8 Drive Collector Switch Collector 1 R207 Prov. R203, 1.5 C202 0.1uF R209 Prov. R206 8.45K, 1% R208 Prov. D201 MBRS140 Q201 Prov. L201 100uH R205 953, 1% Low Current Applications Q201 R207 R208 R209 Out Out "0" ohm resistor Out Out 470 PZT651 High Current Applications SOT-223 "0" ohm resistor Style 1 L202 Prov. FB201 Prov. C204 100uF 16V R204 Prov. C205 Prov. C206 0.1uF Vout (-12V) Gnd