MC34063 View Datasheet(PDF) - Estek Electronics Co. Ltd
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MC34063 Datasheet PDF : 10 Pages
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ET- MC34063
Electrical Characteristics (Ta=25 °C, VCC=5.0V, unless otherwise noted .)
Symbol
Parameter
Oscillator
Fosc
Ichg
Idischg
Idischg/Ichg
Frequency
Charge Current
Discharge Current
Discharge to Charge Current
Ratio
Vipk(sence)
Current Limit Sense Voltage
Output Switch (NOTE3)
VCE(sat)
Saturation Voltage,
Darlington Connection
VCE(sat)
Saturation Voltage,
(NOTE4)
hFE
IC(off)
Comparator
DC Current Gain
Collector Off-State Current
Vth
Threshold Voltage
Regline
IIB
Total Device
Threshold Voltage Line
Regulator
Input Bias Current
ICC
Supply Current
Test Condition
Vpin5=0V, CT=1.0nF
VCC=5.0V to 40V
VCC=5.0V to 40V
Pin 7 to VCC
Icha=Idischa
ISW=1.0A,
Pins 1,8 connected
ISW=1.0A, Rpin8=82Ω to
VCC, Forcedβ=20
ISW=1.0A, VCE=5.0V
VCE=40V
TA=25 °C
TA=-40 °C to +85 °C
VCC=3.0V to 40V
Vin=0V
VCC=5.0V to 40V,
CT=1.0nF, Pin 7=VCC
Vpin 5>Vth, pin2=GND
Remaining pins open
Min.
30
30
180
5.2
250
-
-
50
-
1.225
1.21
-
-
-
Typ.
38
38
240
6.5
300
1.0
0.45
75
0.01
1.25
1.4
-20
-
Max.
45
45
290
7.5
350
1.3
0.8
-
100
1.275
1.29
5.0
-400
4.0
Unit
KHz
uA
uA
-
mV
V
V
-
uA
V
mV
nA
mA
Notes:
3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close ambient
temperature as possible.
4.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 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:
Forced β of output switch:
IC(OUTPUT)
≥10
IC(DRIVER)-7.0mA*
* The 100Ω resistor in the emitter of the driver device requires about 7 mA before the output switch
conducts.
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Copyright @ Estek Electronics Co., Ltd
Version 0.3
27 Sep 2011
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