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MC33063AVD 데이터시트(PDF) 3 Page - ON Semiconductor |
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3 / 12 page MC34063A MC33063A 3 MOTOROLA ANALOG IC DEVICE DATA ELECTRICAL CHARACTERISTICS (continued) (VCC = 5.0 V, TA = Tlow to Thigh [Note 3], unless otherwise specified.) Characteristics Unit Max Typ Min Symbol COMPARATOR Threshold Voltage TA = 25°C TA = Tlow to Thigh Vth 1.225 1.21 1.25 – 1.275 1.29 V Threshold Voltage Line Regulation (VCC = 3.0 V to 40 V) MC33063A, MC34063A MC33363AV Regline – – 1.4 1.4 5.0 6.0 mV Input Bias Current (Vin = 0 V) IIB – –20 – 400 nA TOTAL DEVICE Supply Current (VCC = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = VCC, VPin 5 > Vth, Pin 2 = Gnd, remaining pins open) ICC – – 4.0 mA NOTES: 3. Tlow = 0°C for MC34063A, – 40°C for MC33063A, AV Thigh = +70°C for MC34063A, + 85°C for MC33063A, +125°C for MC33063AV 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 5. If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents ( ≤ 300 mA) and high driver currents (≥ 30 mA), it may take up to 2.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz, and is magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non–Darlington configuration is used, the following output drive condition is recommended: *The 100 Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts. Forced b of output switch : IC output IC driver – 7.0 mA * w 10 ton VCC = 5.0 V Pin 7 = VCC Pin 5 = Gnd TA = 25°C toff Figure 1. Output Switch On–Off Time versus Oscillator Timing Capacitor Figure 2. Timing Capacitor Waveform 0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10 CT, OSCILLATOR TIMING CAPACITOR (nF) 10 µs/DIV VCC = 5.0 V Pin 7 = VCC Pin 2 = Gnd Pins 1, 5, 8 = Open CT = 1.0 nF TA = 25°C 1000 500 200 100 50 20 10 5.0 2.0 1.0 |
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