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MC34063AD Datasheet(PDF) 3 Page - ON Semiconductor

Part No. MC34063AD
Description  1.5 A, Step-Up/Down/ Inverting Switching Regulators
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC34063AD Datasheet(HTML) 3 Page - ON Semiconductor

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MC34063A, MC33063A, SC34063A, SC33063A, NCV33063A
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, TA = Tlow to Thigh [Note 4], unless otherwise specified.)
Characteristics
Symbol
Min
Typ
Max
Unit
OSCILLATOR
Frequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C)
fosc
24
33
42
kHz
Charge Current (VCC = 5.0 V to 40 V, TA = 25°C)
Ichg
24
35
42
mA
Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C)
Idischg
140
220
260
mA
Discharge to Charge Current Ratio (Pin 7 to VCC, TA = 25°C)
Idischg/Ichg
5.2
6.5
7.5
Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C)
Vipk(sense)
250
300
350
mV
OUTPUT SWITCH (Note 5)
Saturation Voltage, Darlington Connection
(ISW = 1.0 A, Pins 1, 8 connected)
VCE(sat)
1.0
1.3
V
Saturation Voltage (Note 6)
(ISW = 1.0 A, RPin 8 = 82 W to VCC, Forced b ] 20)
VCE(sat)
0.45
0.7
V
DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C)
hFE
50
75
Collector Off−State Current (VCE = 40 V)
IC(off)
0.01
100
mA
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)
MC33063, MC34063
MC33063V, NCV33063
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
4. Tlow = 0°C for MC34063, SC34063; −40°C for MC33063, SC33063, MC33063V, NCV33063
Thigh = +70°C for MC34063, SC34063; +85°C for MC33063, SC33063; +125°C for MC33063V, NCV33063
5. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
6. 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 ms 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 b of output switch :
IC output
IC driver – 7.0 mA *
w 10
* The 100 W resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.


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