Schematic for the MC34063 Inverting Leaded Demonstration Board h 9/9/2003 MC34063 Evaluation Board Design Example Voltage Inverting Regulator 5V to -12V@50mA (Leaded Version) IC601 MC34063AP1 P601 Vin (+5V) Gnd C601 100uF 25V R601, 1.0, 1/4W R602, 1.5, 1/4W 5 Feedback Ground 4 6 Vcc 7 Ipk Sense Timing Cap. 3 Switch Emitter 2 8 Drive Collector Switch Collector 1 C603 680pF R606 (Prov.) R607 (Prov.) R603, 1.5, 1/4W Q601 (Prov.) C602 0.1uF C604 220uF 16V L601 100uH R608 (Prov.) R605 8.45K, 1% R604 953, 1% Q601 Low Current Applications Out High Current Applications MPS651 TO-92 L602 Prov. D601 1N5819 R606 R607 R608 Out Short Out Short Out 1K P602 Vout (-12V) FB601 (Prov. for FB) C605 Prov. C606 0.1uF Gnd