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