MC34063A MC33063A
2
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Supply Voltage
VCC
VIR
40
Vdc
Comparator Input Voltage Range
–0.3 to +40
Vdc
Switch Collector Voltage
VC(switch)
VE(switch)
VCE(switch)
VC(driver)
IC(driver)
ISW
40
Vdc
Switch Emitter Voltage (VPin 1 = 40 V)
Switch Collector to Emitter Voltage
40
Vdc
40
Vdc
Driver Collector Voltage
40
Vdc
Driver Collector Current (Note 1)
100
mA
Switch Current
1.5
A
Power Dissipation and Thermal Characteristics
Plastic Package, P, P1 Suffix
TA = 25
°
C
Thermal Resistance
SOIC Package, D Suffix
TA = 25
°
C
Thermal Resistance
PD
R
θ
JA
1.25
100
W
°
C/W
PD
R
θ
JA
TJ
TA
625
160
W
°
C/W
°
C
Operating Junction Temperature
+150
Operating Ambient Temperature Range
MC34063A
MC33063AV
MC33063A
°
C
0 to +70
–40 to +125
–40 to +85
Storage Temperature Range
Tstg
–65 to +150
°
C
NOTES:
1.Maximum package power dissipation limits must be observed.
2.ESD data available upon request.
ELECTRICAL CHARACTERISTICS
(VCC = 5.0 V, TA = Tlow to Thigh [Note 3], unless otherwise specified.)
Characteristics
Symbol
Min
Typ
Max
Unit
OSCILLATOR
Frequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25
°
C)
Charge Current (VCC = 5.0 V to 40 V, TA = 25
°
C)
Discharge Current (VCC = 5.0 V to 40 V, TA = 25
°
C)
Discharge to Charge Current Ratio (Pin 7 to VCC, TA = 25
°
C)
Current Limit Sense Voltage (Ichg = Idischg, TA = 25
°
C)
fosc
Ichg
Idischg
Idischg/Ichg
Vipk(sense)
24
33
42
kHz
24
35
42
μ
A
140
220
260
μ
A
5.2
6.5
7.5
–
250
300
350
mV
OUTPUT SWITCH
(Note 4)
Saturation Voltage, Darlington Connection (Note 5)
(ISW = 1.0 A, Pins 1, 8 connected)
VCE(sat)
–
1.0
1.3
V
Saturation Voltage, Darlington Connection
(ISW = 1.0 A, RPin 8 = 82
to VCC, Forced
β
20)
VCE(sat)
–
0.45
0.7
V
DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25
°
C)
Collector Off–State Current (VCE = 40 V)
hFE
IC(off)
50
75
–
–
–
0.01
100
μ
A
NOTES:
3.Tlow = 0
°
C for MC34063A, –40
°
C for MC33063A, AV Thigh = +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
μ
s 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:
IC output
ICdriver – 7.0 mA *
*The 100
resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Forced
of output switch :
10