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MC34063AD Datasheet(PDF) 4 Page - ON Semiconductor

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

MC34063AD Datasheet(HTML) 4 Page - ON Semiconductor

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MC34063A, MC33063A, SC34063A, SC33063A, NCV33063A
http://onsemi.com
4
0
2
4
6
8
10
12
14
16
18
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
0
20
40
60
80
100
120
140
160
180
Figure 3. Oscillator Frequency
VCC = 5.0 V, Pin 7 = VCC
Pin 5 = GND, TA = 25°C
Ct, TIMING CAPACITOR CAPACITANCE (nF)
ON TIME (ms)
OFF TIME (ms)
FREQUENCY (kHz)
VCC = 5.0 V
Pin 7 = VCC
Pin 2 = GND
Pins 1, 5, 8 = Open
CT = 1.0 nF
TA = 25°C
Figure 4. Timing Capacitor Waveform
10
ms/DIV
Figure 5. Emitter Follower Configuration Output
Saturation Voltage versus Emitter Current
Figure 6. Common Emitter Configuration Output
Switch Saturation Voltage versus
Collector Current
Figure 7. Current Limit Sense Voltage
versus Temperature
Figure 8. Standby Supply Current versus
Supply Voltage
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
IE, EMITTER CURRENT (A)
VCC = 5.0 V
Pins 1, 7, 8 = VCC
Pins 3, 5 = GND
TA = 25°C
(See Note 7)
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
IC, COLLECTOR CURRENT(A)
Darlington Connection
Forced
b = 20
-55
-25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (°C)
VCC = 5.0 V
Ichg = Idischg
0
5.0
10
15
20
25
30
35
40
VCC, SUPPLY VOLTAGE (V)
CT = 1.0 nF
Pin 7 = VCC
Pin 2 = GND
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1.1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
400
380
360
340
320
300
280
260
240
220
200
3.6
3.2
2.4
2.0
1.6
1.2
0.8
0.4
0
1.0
2.8
VCC = 5.0 V
Pin 7 = VCC
Pins 2, 3, 5 = GND
TA = 25°C
(See Note 7)
7. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.


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