MC34063A MC33063A
2
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating Symbol Value Unit
Power Supply Voltage V
CC
40 Vdc
Comparator Input Voltage Range V
IR
–0.3 to +40 Vdc
Switch Collector Voltage V
C(switch)
40 Vdc
Switch Emitter Voltage (V
Pin
1
= 40 V) V
E(switch)
40 Vdc
Switch Collector to Emitter Voltage V
CE(switch)
40 Vdc
Driver Collector Voltage V
C(driver)
40 Vdc
Driver Collector Current (Note 1) I
C(driver)
100 mA
Switch Current I
SW
1.5 A
Power Dissipation and Thermal Characteristics
Plastic Package, P, P1 Suffix
T
A
= 25°C P
D
1.25 W
Thermal Resistance R
θJA
100 °C/W
SOIC Package, D Suffix
T
A
= 25°C P
D
625 W
Thermal Resistance R
θJA
160 °C/W
Operating Junction Temperature T
J
+150 °C
Operating Ambient Temperature Range T
A
°C
MC34063A 0 to +70
MC33063AV –40 to +125
MC33063A –40 to +85
Storage Temperature Range T
stg
–65 to +150 °C
NOTES: 1. Maximum package power dissipation limits must be observed.
2. ESD data available upon request.
ELECTRICAL CHARACTERISTICS (V
CC
= 5.0 V, T
A
= T
low
to T
high
[Note 3], unless otherwise specified.)
Characteristics Symbol Min Typ Max Unit
OSCILLATOR
Frequency (V
Pin
5
= 0 V, C
T
= 1.0 nF, T
A
= 25°C) f
osc
24 33 42 kHz
Charge Current (V
CC
= 5.0 V to 40 V, T
A
= 25°C) I
chg
24 35 42 µA
Discharge Current (V
CC
= 5.0 V to 40 V, T
A
= 25°C) I
dischg
140 220 260 µA
Discharge to Charge Current Ratio (Pin 7 to V
CC
, T
A
= 25°C) I
dischg
/I
chg
5.2 6.5 7.5 –
Current Limit Sense Voltage (I
chg
= I
dischg
, T
A
= 25°C) V
ipk(sense)
250 300 350 mV
OUTPUT SWITCH (Note 4)
Saturation Voltage, Darlington Connection (Note 5)
(I
SW
= 1.0 A, Pins 1, 8 connected)
V
CE(sat)
– 1.0 1.3 V
Saturation Voltage, Darlington Connection
(I
SW
= 1.0 A, R
Pin
8
= 82 Ω to V
CC
, Forced β
]
20)
V
CE(sat)
– 0.45 0.7 V
DC Current Gain (I
SW
= 1.0 A, V
CE
= 5.0 V, T
A
= 25°C) h
FE
50 75 – –
Collector Off–State Current (V
CE
= 40 V) I
C(off)
– 0.01 100 µA
NOTES: 3. T
low
= 0°C for MC34063A, –40°C for MC33063A, AV T
high
= +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
5. 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 µs 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:
*The 100 Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Forced
b
of output switch :
I
C
output
I
C
driver – 7.0 mA *
w
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