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MC34063AD Datasheet(PDF) 3 Page - ARTSCHIP ELECTRONICS CO.,LMITED.

Part No. MC34063AD
Description  SMPS Controller
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Manufacturer  ARTSCHIP [ARTSCHIP ELECTRONICS CO.,LMITED.]
Direct Link  http://www.artschip.com/
Logo ARTSCHIP - ARTSCHIP ELECTRONICS CO.,LMITED.

MC34063AD Datasheet(HTML) 3 Page - ARTSCHIP ELECTRONICS CO.,LMITED.

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MC34063A MC33063A
www.artschip.com
3
ELECTRICAL CHARACTERISTICS
(continued) (VCC = 5.0V, TA = T low to Thigh [Note 3], unless otherwise specified.)
Characteristics
Symbol
Min
Typ
Max
Unit
OSCILLATO
Threshold Voltage
TA = 25℃
TA = T low to T high
V th
1.225
1.21
1.25
1.275
1.29
V
Threshold Voltage Line Regulation (VCC = 3.0 V to 40V)
MC33063A, MC34063A
MC33363V
Regline
1.4
1.4
5.0
6.0
mV
Input Bias Current (V in = 0V)
IIB
-20
-400
nA
TOTAL DEVICE
Supply Current (VCC = 5.0V to 40V, CT = 1.0nF, Pin 7 = VCC,
V Pin 5 > V th, Pin 2 = Gnd, remaining pins open)
ICC
4.0
mA
NOTES:
3. Tlow =0℃ for MC34063A, -40℃ for MC33063A, AV
Thigh = +70℃ for MC34063A, +85℃ for MC33063A, +125℃ 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 (≤300mA) and high driver
currents(
≥30mA), it may take up to 2.0µs for it to come out of saturation. This condition will shorten the off time at
frequencies≥30kHz, 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:
Forced ß of output switch:
*The 100Ω resistor in the emitter of the driver device requires about 7.0mA before the output switch conducts.
Figure 1. Output Switch On-Off Time Versus
Oscillator Timing Capacitor
Figure 2. Timing Capacitor Waveform


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