MC34063A, MC33063A, NCV33063A
1000
V
Pin 7 = V
= 5.0 V
500
200
100
50
CC
CC
Pin 5 = GND
= 25°C
T
A
t
on
20
10
5.0
2.0
1.0
V
= 5.0 V
CC
Pin 7 = V
Pins 1, 5, 8 = Open
t
off
C
T
= 1.0 nF
= 25°C
CC
T
Pin 2 = GND
A
0.01 0.02
0.05 0.1 0.2
0.5 1.0 2.0
5.0 10
10 ms/DIV
C , OSCILLATOR TIMING CAPACITOR (nF)
T
Figure 2. Output Switch On−Off Time versus
Oscillator Timing Capacitor
Figure 3. Timing Capacitor Waveform
1.1
1.0
0.9
0.8
0.7
0.6
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
Darlington Connection
V
Pin 7 = V
= 5.0 V
CC
0.5
0.4
0.3
0.2
CC
Forced b = 20
Pins 2, 3, 5 = GND
= 25°C
(See Note 7)
T
A
V
= 5.0 V
Pins 1, 7, 8 = V
CC
CC
Pins 3, 5 = GND
T
= 25°C
(See Note 7)
A
0.1
0
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
I , EMITTER CURRENT (A)
E
I , COLLECTOR CURRENT(A)
C
Figure 4. Emitter Follower Configuration Output
Saturation Voltage versus Emitter Current
Figure 5. Common Emitter Configuration Output
Switch Saturation Voltage versus
Collector Current
3.6
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0
400
380
V
= 5.0 V
= I
CC
360
340
I
chg dischg
320
300
280
260
240
220
200
C
Pin 7 = V
= 1.0 nF
T
CC
Pin 2 = GND
0
5.0
10
15
20
25
30
35
40
−55
−25
0
25
50
75
100
125
T , AMBIENT TEMPERATURE (°C)
A
V
, SUPPLY VOLTAGE (V)
CC
Figure 6. Current Limit Sense Voltage
versus Temperature
Figure 7. Standby Supply Current versus
Supply Voltage
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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