MC34067, MC33067
http://onsemi.com
5
A
VOL
, OPEN LOOP
VOL
TAGE GAIN (dB)
R
T
Ω
, TIMING
RESIST
OR
(k
)
R
OSC
Ω
, OSCILLA
T
O
R
TIMING RESIST
OR (k
)
One-Shot Period is Measured
at the Drive Outputs.
Oscillator Discharge Time is Measured at the Drive Outputs.
f OSC
C
OSC
= 200 pF
60
30
20
10
6.0
3.0
500
0
, OSCILLA
T
OR FREQUENCY
(kHz)
t
dischg
, OSCILLATOR DISCHARGE TIME (
m
s)
3500
3000
2500
2000
1500
1000
I
OSC
, OSCILLATOR CONTROL CURRENT (
m
A)
0.35
0.30
0.25
0.20
0.15
0.10
I
OSC
, OSCILLATOR CONTROL CURRENT (mA)
t
OS
, ONE-SHOT PERIOD (
m
s)
0
0.05
200
V
CC
= 12 V
T
A
= 25
°
C
R
OSC
= 18.2 k
400
300
100
500
C
OSC
= 300 pF
0
-10
-20
-30
-40
-50
50
40
30
20
10
0
f, FREQUENCY (Hz)
, REFERENCE OUTPUT
VOL
TAGE CHANGE (mV)
T
A
, AMBIENT TEMPERATURE (
°
C)
-20
∇
-10
Gain
V
ref
50
60
70
80
90
100
120
110
0, EXCESS PHASE (DEGREES)
C
OSC
= 500 pF
C
OSC
= 300 pF
V
CC
= 12 V
R
VFO
=
∞
R
T
=
∞
C
T
= 500 pF
T
A
= 25
°
C
Figure 2. Oscillator Timing Resistor
versus Discharge Time
Figure 3. Oscillator Frequency versus
Oscillator Control Current
Figure 4. Error Amp Output Low State Voltage
versus Oscillator Control Current
Figure 5. One
−
Shot Timing Resistor
versus Period
Figure 6. Open Loop Voltage Gain and Phase
versus Frequency
Figure 7. Reference Output Voltage Change
versus Temperature
0
400
800
1200
1600
2000
0
20
40
60
80
100
0
0.5
1.0
1.5
2.0
2.5
3.0
0.1
0.3
0.6
1.0
3.0
6.0
10
10 k
100 k
1.0M
10M
-55
-25
0
25
50
75
125
100
V
CC
= 12 V
V
O
= 2.0 V
R
L
= 100 k
T
A
= 25
°
C
V
CC
= 12 V
R
L
=
∞
*V
ref at
T
A
= 25
°
C
V
CC
= 12 V
C
OSC
= 500 pF
R
OSC
= 100 k
T
A
= 25
°
C
Phase
Margin
= 64
°
*V
ref
= 5.1 V
C
T
= 200 pF
C
T
= 300 pF
C
T
= 500 pF
Phase
*V
ref
= 5.2 V
*V
ref
= 5.0 V
V
OL
, OUTPUT LOW ST
A
TE VOL
TAGE (V)
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