MC34063A MC33063A
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mA
A
Power Supply Voltage
V
CC
40
Comparator Input Voltage Range
Switch Collector Voltage
V
IR
–0.3 to +40
V
V
40
40
C(switch)
Switch Emitter Voltage (V
= 40 V)
Pin 1
E(switch)
Switch Collector to Emitter Voltage
Driver Collector Voltage
V
40
CE(switch)
V
40
C(driver)
C(driver)
Driver Collector Current (Note 1)
Switch Current
I
100
1.5
I
SW
Power Dissipation and Thermal Characteristics
Plastic Package, P, P1 Suffix
T
= 25°C
P
1.25
100
W
°C/W
A
D
Thermal Resistance
R
θJA
SOIC Package, D Suffix
T
= 25°C
P
625
160
W
°C/W
A
D
Thermal Resistance
R
θJA
Operating Junction Temperature
T
+150
°C
°C
J
Operating Ambient Temperature Range
MC34063A
MC33063AV
T
A
0 to +70
–40 to +125
–40 to +85
MC33063A
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 = T
to T
[Note 3], unless otherwise specified.)
high
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
µA
µA
–
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
dischg chg
/I
CC
A
Current Limit Sense Voltage (I
= I
, T = 25°C)
V
mV
chg dischg
A
ipk(sense)
OUTPUT SWITCH (Note 4)
Saturation Voltage, Darlington Connection (Note 5)
(I = 1.0 A, Pins 1, 8 connected)
V
V
–
–
1.0
1.3
0.7
V
V
CE(sat)
SW
Saturation Voltage, Darlington Connection
(I = 1.0 A, R = 82 Ω to V , Forced β
0.45
CE(sat)
20)
SW CC
Pin 8
DC Current Gain (I
= 1.0 A, V
= 5.0 V, T = 25°C)
h
FE
50
–
75
–
–
SW
CE
A
Collector Off–State Current (V
= 40 V)
I
0.01
100
µA
CE
C(off)
NOTES: 3. T
= 0°C for MC34063A, –40°C for MC33063A, AV
T
= +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV
high
low
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:
I
output
C
Forced of output switch :
10
I
driver – 7.0 mA *
C
*The 100 Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
2
MOTOROLA ANALOG IC DEVICE DATA