MC34063A
ELECTRICAL CHARACTERISTICS
(Refer to the test circuits, V
CC
= 5V, T
a
= T
LOW
to T
HIGH
, unless
otherwise specified, see note 2)
OSCILLATOR
Symbol
f
OSC
I
ch g
I
dischg
Parameter
Frequency
Charge Currernt
Discharge Current
V
pin5
= 0 V
Test Conditions
C
T
= 1 nF
T
a
= 25
o
C
V
CC
= 5 to 40 V
V
CC
= 5 to 40 V
Pin 7 = V
CC
T
a
= 25
o
C
T
a
= 25
o
C
Min.
24
24
140
5.2
250
Typ.
33
33
200
6.2
300
Max.
42
42
260
7.5
350
mV
Unit
KHz
µ
A
µ
A
I
d is ch g
/I
chg
Discharge to Charge
Current Ratio
T
a
= 25
o
C
T
a
= 25
o
C
V
i pk( sense)
Current Limit Sense Voltage I
chg
= I
dischg
OUTPUT SWITCH
Symbol
V
CE(sat)
V
CE(sat)
h
F E
I
C( off)
Parameter
Saturation Voltage,
Darlington Connection
Saturation Voltage
DC Current Gain
Collector Off-State Current
I
SW
= 1 A
Test Conditions
Pins 1, 8 connected
Min.
Typ.
1
0.45
o
Max.
1.3
0.7
Unit
V
V
I
SW
= 1 A R
pin8
= 82
Ω
to V
CC
,
Forced
β
~ 20
I
SW
= 1 A
V
CE
= 40 V
V
CE
= 5 V
T
a
= 25 C
50
120
0.01
100
µA
COMPARATOR
Symbol
V
t h
Reg
li ne
I
I B
Parameter
Threshold Voltage
Threshold Voltage Line
Regulation
Input Bias Current
o
Test Conditions
T
a
= 25 C
T
a
= T
LOW
to T
HIGH
V
CC
= 3 to 40 V
V
IN
= 0 V
Min.
1.225
1.21
Typ.
1.25
1
-5
Max.
1.275
1.29
5
-400
Unit
V
V
mV
nA
TOTAL DEVICE
Symbol
I
CC
Parameter
Supply Current
Test Conditions
V
CC
= 5 to 40 V
C
T
= 1 nF
Pin 7 = V
CC
V
pin5
> V
th
Pin 2 = GND
Remaining pins open
Min.
Typ.
2.5
Max.
4
Unit
mA
NOTES:
1) Maximum package power dissipation limit must be observed.
2) T
LOW
= 0
o
C, T
HIGH
= 70
o
C (AC series); T
LOW
= -40
o
C, T
HIGH
= 85
o
C (AB series).
3) If Darlington configuration is not used, care must be taken to avoid deep saturation of output switch. The resulting switch-off time may be
adversely affected. In a Darlington configuration the following output driver condition is suggested:
Forced
β
of output current switch = I
COUTPUT
/(I
CDRIVER
- 1mA*)
≥
10
* Current less due to a built in 1K
Ω
antileakage resistor.
3/15
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