MC33063A
MC34063A
www.ti.com
SLLS636L –DECEMBER 2004–REVISED DECEMBER 2009
TYPICAL CHARACTERISTICS
1000
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
V
= 5 V
VCC = 5 V
CC
Pin 1, 7, 8 = V
CC
Pin 7 = VCC
Pin 5 = GND
TA = 25°C
Pin 3, 5 = GND
= 25°C
tON
T
A
100
10
1
tOFF
1.0
1
0
1
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
0.01
0.1 1
CT, Oscillator Timing Capacitor (nF)
10
I , Emitter Current (A)
E
Figure 1. Output Switch On-Off Time vs
Oscillator Timing Capacitor
Figure 2. Output Switch Saturation Voltage vs
Emitter Current (Emitter-Follower Configuration)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
380
Darlington Connection
Force Beta = 20
V
= 5 V
= I
DISCHG
CC
360
340
320
300
280
260
240
220
200
I
CHG
V
CC
= 5 V
Pin 7 = V
CC
Pin 2, 3, 5 = GND
= 25°C
T
A
0.
0
−50 −25
0
25
50
75
100
125
0
1
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
T , Ambient Temperature (°C)
A
I , Collector Current (A)
C
Figure 3. Output Switch Saturation Voltage vs
Collector Current (Common-Emitter Configuration)
Figure 4. Current-Limit Sense Voltage vs Temperature
3.6
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0.0
C = 1 nF
T
Pin 7 = V
CC
Pin 2 = GND
T = 25°C
A
0
5
10
15
20
25
30
35
40
V , Supply Voltage (V)
CC
Figure 5. Standby Supply Current vs Supply Voltage
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