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| SMD Type Integrate Circuit 1.2 A, Step-Up/Down/Inverting Switching Regulators MC34063 Features Low Standby Current Current Limiting Output Switch Current to 1.2 A Output Voltage Adjustable Frequency Operation to 100 kHz Precision 2% Reference Absolute Maximum Ratings Ta = 25 Parameter Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage (VPin 1 = 40 V) Switch Collector to Emitter Voltage Driver Collector Voltage Driver Collector Current * Switch Current Power Dissipation and Thermal Characteristics TA = 25 Thermal Resistance Operating Junction Temperature Operating Ambient Temperature Range Storage Temperature Range PD ReJA TJ TA Tstg 625 160 150 0 to +70 -65 to +150 mW /W Symbol VCC VIR VC(switch) VE(switch) VCE(switch) VC(driver) IC(driver) ISW Rating 40 -0.3 to +40 40 40 40 40 100 1.2 Unit V V V V V V mA A * Maximum package power dissipation limits must be observed. www.kexin.com.cn 1 SMD Type MC34063 Electrical Characteristics Ta = 25 Parameter Frequency Charge Current Discharge Current Discharge to Charge Current Ratio Current Limit Sense Voltage Saturation Voltage, Darlington Connection Saturation Voltage (Forced a DC Current Gain Collector Off-State Current Threshold Voltage TA = 25 TA =0 to 70 Regline IIB ICC VCC = 3.0 V to 40 V Vin = 0 V Vth 20) Symbol fosc Ichg Idischg Testconditons Integrate Circuit Min 24 24 140 5.2 250 Typ 33 35 220 6.5 300 1.0 0.45 Max 42 42 260 7.5 350 1.3 0.7 Unit kHz A A VPin 5 = 0 V, CT = 1.0 nF, TA = 25 VCC = 5.0 V to 40 V, TA = 25 VCC = 5.0 V to 40 V, TA = 25 Idischg/Ichg Pin 7 to VCC, TA = 25 Vipk(sense) VCE(sat) VCE(sat) hFE IC(off) Ichg = Idischg, TA = 25 ISW =0.8 A, Pins 1, 8 connected ISW =0.8A, RPin 8 = 82 to VCC, mV V V ISW =0.8 A, VCE = 5.0 V, TA = 25 VCE = 40 V 50 75 0.01 100 A 1.225 1.21 1.25 1.275 1.29 V Threshold Voltage Line Regulation Input Bias Current Supply Current VPin 5 > Vth, Pin 2 = GND, remaining pins open 1.4 -20 5.0 -400 4.0 mV nA mA VCC = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = VCC, 2 www.kexin.com.cn |
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