MC34063A Datasheet, PDF (4/12 Pages) ON Semiconductor – DC-to-DC CONVERTER CONTROL CIRCUITS

MC34063A MC33063A
Figure 3. Emitter Follower Configuration Output
Saturation Voltage versus Emitter Current
1.8
1.7
1.6
1.5
1.4
1.3
VCC = 5.0 V
1.2
Pins 1, 7, 8 = VCC
Pins 3, 5 = Gnd
1.1
TA = 25°C
(See Note 4)
1.0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
IE, EMITTER CURRENT (A)
Figure 4. Common Emitter Configuration Output
Switch Saturation Voltage versus
Collector Current
1.1
1.0
0.9
Darlington Connection
0.8
0.7
0.6 _{VCC = 5.0 V}
0.5 Pin 7 = VCC
0.4
Pins 2, 3, 5 = Gnd
TA = 25°C
0.3 (See Note 4)
Forced β = 20
0.2
0.1
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
IC, COLLECTOR CURRENT(A)
Figure 5. Current Limit Sense Voltage
versus Temperature
400
380
360
VCC = 5.0 V
Ichg = Idischg
340
320
300
280
260
240
220
200
–55
–25
0
25
50
75
100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 6. Standby Supply Current versus
Supply Voltage
3.6
3.2
2.8
2.4
2.0
1.6
1.2
CT = 1.0 nF
0.8
Pin 7 = VCC
Pin 2 = Gnd
0.4
0
0 5.0 10 15 20 25 30 35 40
VCC, SUPPLY VOLTAGE (V)
NOTE: 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
4
MOTOROLA ANALOG IC DEVICE DATA