ON Semiconductor MC33067 - Page 6

MC34067, MC33067
http://onsemi.com
6
24
2.0
, REFERENCE OUTPUT VOLTAGE CHANGE (mV)
∇
V
ref
V
sat
3.2
2.4
1.6
0.8
0
0
-50
, OUTPUT SATURATION VOLTAGE (V)
Figure 8. Reference Output Voltage Change
versus Source Current
I
ref
, REFERENCE SOURCE CURRENT (mA)
Figure 9. Drive Output Saturation Voltage
versus Load Current
0
-1.0
-2.0
-3.0
3.0
I
O
, OUTPUT LOAD CURRENT (A)
Figure 10. Drive Output Waveform
90%
10%
20 ns/DIV
V , SOFT-START SATURATION VOLTAGE (V)
Figure 11. Soft−Start Saturation Voltage
versus Capacitor Discharge Current
I
dchg
, CAPACITOR DISCHARGE CURRENT (mA)
0
-30
-10
-20
-40
1.0
2000
1600
1200
800
400
0
f, OPERATING FREQUENCY (kHz)
Figure 12. Operating Frequency
versus Supply Current
I
CC
, SUPPLY CURRENT (mA)
Source Saturation
(Load to Ground)
Source Saturation
(Load to V
CC
)
OL
GND
T
A
= -40°C
T
A
= 25°C
Figure 13. Supply Current versus Supply Voltage
T
A
= 25°C
T
A
= -40°C
V
CC
, SUPPLY VOLTAGE (V)
20
12
4.0
0
I , SUPPLY CURRENT (mA)
CC
16
8.0
V
CC
= 12 V
80 ms Pulsed Load
120 Hz Rate
T
A
= -40°C
C
L
= 1.0 nF
T
A
= 25 °C
0 0.2 0.4 0.6 0.8 1.00 20 40 60 80 100
0 2.0 4.0 6.0 8.0 10
30 40 50 60 70 80 90 0 4.0 8.0 12 16 20
V
CC
= 12 V
C
L
= 1.0 nF
T
A
= 25 °C
V
CC
= 12 V
Pin 10 = V
ref
T
A
= 25 °C
T
A
= -20°C
T
A
= -125°C
V
CC
= 12 V
V
CC
T
A
= 25 °C
Enable/UVLO
Adjust Pin
to V
CC
(Dashed Line)
Enable/UVLO
Adjust Pin
Open
(Solid Line)
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