MC34063A, MC33063A, NCV33063A
ELECTRICAL CHARACTERISTICS (V = 5.0 V, T = T to T [Note 4], unless otherwise specified.)
high
CC
A
low
Characteristics
Symbol
Min
Typ
Max
Unit
OSCILLATOR
Frequency (V
= 0 V, C = 1.0 nF, T = 25°C)
f
24
24
33
35
42
42
kHz
mA
mA
−
Pin 5
T
A
osc
Charge Current (V = 5.0 V to 40 V, T = 25°C)
I
CC
A
chg
Discharge Current (V = 5.0 V to 40 V, T = 25°C)
I
140
5.2
250
220
6.5
300
260
7.5
350
CC
A
dischg
Discharge to Charge Current Ratio (Pin 7 to V , T = 25°C)
I
/I
CC
A
dischg chg
Current Limit Sense Voltage (I
= I
, T = 25°C)
V
ipk(sense)
mV
chg
dischg
A
OUTPUT SWITCH (Note 5)
Saturation Voltage, Darlington Connection
(I = 1.0 A, Pins 1, 8 connected)
V
−
−
1.0
1.3
0.7
V
V
CE(sat)
CE(sat)
SW
Saturation Voltage (Note 6)
V
0.45
(I
= 1.0 A, R
= 82 W to V , Forced b ] 20)
SW
Pin 8
CC
DC Current Gain (I
= 1.0 A, V = 5.0 V, T = 25°C)
h
50
−
75
−
−
SW
CE
A
FE
Collector Off−State Current (V = 40 V)
I
0.01
100
mA
CE
C(off)
COMPARATOR
Threshold Voltage
V
V
th
T = 25°C
1.225
1.21
1.25
−
1.275
1.29
A
T = T
to T
A
low
high
Threshold Voltage Line Regulation (V = 3.0 V to 40 V)
Reg
mV
CC
line
MC33063A, MC34063A
MC33063AV, NCV33063A
−
−
1.4
1.4
5.0
6.0
Input Bias Current (V = 0 V)
I
−
−20
−400
nA
in
IB
TOTAL DEVICE
Supply Current (V = 5.0 V to 40 V, C = 1.0 nF, Pin 7 = V
,
I
CC
−
−
4.0
mA
CC
T
CC
V
> V , Pin 2 = GND, remaining pins open)
th
Pin 5
4. T
T
= 0°C for MC34063A, −40°C for MC33063A, AV, NCV33063A
high
low
= +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV, NCV33063A
5. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
6. If the output switch is driven into hard saturation (non−Darlington configuration) at low switch currents (≤ 300 mA) and high driver currents
(≥ 30 mA), it may take up to 2.0 ms for it to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz, and is
magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a
non−Darlington configuration is used, the following output drive condition is recommended:
I
output
C
Forced b of output switch :
w 10
I
driver – 7.0 mA *
C
* The 100 W resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
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