MC34063A
ELECTRICAL CHARACTERISTICS
Parameter
OSCILLATOR
Frequency
Charge Current
Discharge Current
Discharge to Charge
Current Ratio
Current Limit
Sense Voltage
f
osc
I
chg
I
dischg
I
dischg
/I
chg
V
lpk(sense)
Symbol
DC-TO-DC Converter Control Circuits
(Vcc = 5.0V, T
A
=0 to +70°C, unless otherwise specified)
Test Conditions
Min
Typ Max Unit
33
33
42
42
kHz
μA
μA
V
Pin5
=0V,C
T
=1.0nF,T
A
= 25°C 24
V
CC
= 5.0V to 40V, T
A
= 25°C 24
V
CC
= 5.0V to 40V, T
A
= 25°C 140
Pin7 to V
CC
, T
A
=25°C
I
chg
= I
dischg
, T
A
= 25°C
5.2
250
200 260
6.2
7.5
300 350
mV
OUTPUT SWITCH (Note 3)
Saturation Voltage,
V
CE(sat)
Darlington Connection
Saturation Voltage,
Darlinton Connection
I
SW
= 1.0A,
Pins 1, 8 connected
I
SW
= 1.0A, Forced β = 20
R
Pin 8
= 82Ω to V
CC
I
SW
= 1.0A, V
CE
=5.0V,
T
A
= 25°C
V
CE
= 40V
1.0
1.3
V
V
V
CE(sat)
h
FE
I
C(off)
0.45 0.7
50
75
40
100
DC Current Gain
Collector Off-State
Current
COMPARATOR
Threshold Voltage
Threshold Voltage
Line Regulation
Input Bias Current
TOTAL DEVICE
Supply Current
μA
V
th
Reg
line
I
IB
T
A
= 25°C
T
A
= T
low
to T
high
V
CC
= 3.0V to 40V
V
in
= 0V
V
CC
= 5.0V to 40V,
C
T
= 10nF, V
pin7
= V
CC
,
V
Pin5
> V
th
, Pin 2 = GND,
Remaining pins open
1.225 1.25 1.275
1.21
1.4
1.29
5.0
V
mV
nA
-20 -400
I
CC
2.5
4.0
mA
NOTE 1: Maximum package power dissipation limits must be observed
NOTE 2: Low duty cycle pulse techniques are used during test to maintain juction temperature as
close to ambient temperature as possible
3
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