MC34067, MC33067
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 12 V [Note 6], R
OSC
= 18.2 k, R
VFO
= 2940
W,
C
OSC
= 300 pF,
R
T
= 2370
W,
C
T
= 300 pF, C
L
= 1.0 nF. For typical values T
A
= 25°C, for min/max values T
A
is the operating ambient temperature range
that applies (Note 7), unless otherwise noted.)
Characteristic
OSCILLATOR
Frequency (Error Amp Output Low)
Total Variation (V
CC
= 10 V to 18 V, T
A
= T
Low
to T
High
)
Frequency (Error Amp Output High)
Total Variation (V
CC
= 10 V to 18 V, T
A
= T
Low
to T
High
)
Oscillator Control Input Voltage, Pin 3
ONE−SHOT
Drive Output Off−Time
T
A
= 25°C
Total Variation (V
CC
= 10 V to 18 V, T
A
= T
Low
to T
High
)
DRIVE OUTPUTS
Output Voltage
Low State (I
Sink
= 20 mA)
Low State
(I
Sink
= 200 mA)
High State (I
Source
= 20 mA)
High State
(I
Source
= 200 mA)
Output Voltage with UVLO Activated (V
CC
= 6.0 V, I
Sink
= 1.0 mA)
Output Voltage Rise Time (C
L
= 1.0 nF)
Output Voltage Fall Time (C
L
= 1.0 nF)
FAULT COMPARATOR
Input Threshold
Input Bias Current (V
Pin 10
= 0 V)
Propagation Delay to Drive Outputs (100 mV Overdrive)
SOFT−START
Capacitor Charge Current (V
Pin 11
= 2.5 V)
Capacitor Discharge Current (V
Pin 11
= 2.5 V)
UNDERVOLTAGE LOCKOUT
Startup Threshold, V
CC
Increasing
Enable/UVLO Adjust Pin Open
Enable/UVLO Adjust Pin Connected to V
CC
Minimum Operating Voltage After Turn−On, V
CC
Decreasing
Enable/UVLO Adjust Pin Open
Enable/UVLO Adjust Pin Connected to V
CC
Enable/UVLO Adjust Shutdown Threshold Voltage
Enable/UVLO Adjust Input Current (Pin 9 = 0 V)
TOTAL DEVICE
Power Supply Current (Enable/UVLO Adjust Pin Open)
Startup (V
CC
= 13.5 V)
Operating (f
OSC
= 500 kHz) (Note 6)
5.
6.
7.
8.
I
CC
−
−
0.5
27
0.8
35
mA
V
th(UVLO)
14.8
8.0
V
CC(min)
8.0
7.6
V
th(Enable)
I
in(Enable)
6.0
−
9.0
8.6
7.0
− 0.2
10
9.6
−
− 1.0
V
mA
16
9.0
17.2
10
V
V
I
chg
I
dischg
4.5
3.0
9.0
8.0
14
−
mA
mA
V
th
I
IB
t
PLH(In/Out)
0.93
−
−
1.0
− 2.0
60
1.07
− 10
100
V
mA
ns
V
V
OL
V
OH
V
OL(UVLO)
t
r
t
f
−
−
9.5
9.0
−
−
−
0.8
1.5
10.3
9.7
0.8
20
15
1.2
2.0
−
−
1.2
50
50
V
ns
ns
t
Blank
235
225
250
−
270
280
ns
kHz
f
OSC(low)
f
OSC(high)
V
in
490
1850
−
525
2050
2.5
550
kHz
2200
−
V
Symbol
Min
Typ
Max
Unit
Maximum package power dissipation limits must be observed.
Adjust V
CC
above the Startup Threshold voltage before setting to 12 V.
Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
T
low
= 0°C for MC34067
= − 40°C for MC33067
T
high
= + 70°C for MC34067
= + 85°C for MC33067
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