Datasheet

Electrical characteristics MC34063AB, MC34063AC, MC34063EB, MC34063EC
6/23 DocID5257 Rev 11
4 Electrical characteristics
Refer to the test circuits, V
CC
= 5 V, T
A
= T
LOW
to T
HIGH
, unless otherwise specified.
(a)
a. T
LOW
= 0 °C, T
HIGH
= 70 °C (AC and EC series); T
LOW
= -40 °C, T
HIGH
= 85 °C (AB series); T
LOW
= -40 °C,
T
HIGH
= 125 °C (EB series)
Table 5. Oscillator
Symbol Parameter Test conditions Min. Typ. Max. Unit
f
OSC
Frequency V
PIN5
= 0V, C
T
= 1 nF, T
A
= 25°C 24 33 42 kHz
I
CHG
Charge current V
CC
= 5 to 40V, T
A
= 25°C 24 33 42 µA
I
DISCHG
Discharge current V
CC
= 5 to 40V, T
A
= 25°C 140 200 260 µA
I
DISCHG
/I
CHG
Discharge to charge
current ratio
PIN 7 = V
CC
, T
A
= 25°C 5.2 6.2 7.5 µA
V
IPK(sense)
Current limit sense voltage I
CHG
= I
DISCHG,
T
A
= 25°C 250 300 350 mV
Table 6. Output switch
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
CE(sat)
Saturation voltage, Darlington
connection
I
SW
= 1 A, PIN 1, 8 connected 1 1.3 V
V
CE(sat)
Saturation voltage
I
SW
= 1 A, R
PIN8
= 82  to V
CC
Forced  ~ 20
0.45 0.7 V
h
FE
DC current gain I
SW
= 1 A,V
CE
= 5 V, T
A
= 25°C 50 120
I
C(off)
Collector off-state current V
CE
= 40 V 0.01 100 µA
Table 7. Comparator
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
TH
Threshold voltage
T
A
= 25°C 1.225 1.25 1.275
V
T
A
= T
LOW
to T
HIGH
1.21 1.29
Reg
line
Threshold voltage line
regulation
V
CC
= 3 to 40 V 1 5 mV
I
IB
Input bias current V
IN
= 0 V -5 -400 nA