Datasheet
Electrical Characteristics
Oscillator
Output Switch
(1)
Comparator
Total Device
MC33063A-Q1
www.ti.com
................................................................................................................................................ SLLS654B – APRIL 2005 – REVISED SEPTEMBER 2008
V
CC
= 5 V, T
A
= full operating range (unless otherwise noted) (see block diagram)
PARAMETER TEST CONDITIONS T
A
MIN TYP MAX UNIT
f
osc
Oscillator frequency V
PIN5
= 0 V, C
T
= 1 nF 25 ° C 24 33 42 kHz
I
chg
Charge current V
CC
= 5 V to 40 V 25 ° C 24 35 42 µ A
I
dischg
Discharge current V
CC
= 5 V to 40 V 25 ° C 140 220 260 µ A
I
dischg
/I
chg
Discharge-to-charge current ratio V
PIN7
= V
CC
25 ° C 5.2 6.5 7.5
V
Ipk
Current-limit sense voltage I
dischg
= I
chg
25 ° C 250 300 350 mV
PARAMETER TEST CONDITIONS T
A
MIN TYP MAX UNIT
Saturation voltage –
V
CE(sat)
I
SW
= 1 A, pins 1 and 8 connected Full range 1 1.3 V
Darlington connection
Saturation voltage – I
SW
= 1 A, R
PIN8
= 82 Ω to V
CC
,
V
CE(sat)
Full range 0.45 0.7 V
non-Darlington connection
(2)
Forced β ~ 20
h
FE
DC current gain I
SW
= 1 A, V
CE
= 5 V 25 ° C 50 75
I
C(off)
Collector off-state current V
CE
= 40 V Full range 0.01 100 µ A
(1) Low duty-cycle pulse testing is used to maintain junction temperature as close to ambient temperature as possible.
(2) In the non-Darlington configuration, if the output switch is driven into hard saturation at low switch currents ( ≤ 300 mA) and high driver
currents ( ≥ 30 mA), it may take up to 2 µ s for the switch to come out of saturation. This condition effectively shortens the off time at
frequencies ≥ 30 kHz, becoming magnified as temperature increases. The following output drive condition is recommended in the
non-Darlington configuration:
Forced β of output switch = I
C,SW
/ (I
C,driver
– 7 mA) ≥ 10, where ∼ 7 mA is required by the 100- Ω resistor in the emitter of the driver to
forward bias the V
be
of the switch.
PARAMETER TEST CONDITIONS T
A
MIN TYP MAX UNIT
25 ° C 1.225 1.25 1.275
V
th
Threshold voltage V
Full range 1.21 1.29
Δ V
th
Threshold-voltage line regulation V
CC
= 5 V to 40 V Full range 1.4 5 mV
I
IB
Input bias current V
IN
= 0 V Full range – 20 – 400 nA
PARAMETER TEST CONDITIONS T
A
MIN MAX UNIT
V
CC
= 5 V to 40 V, C
T
= 1 nF,
I
CC
Supply current V
PIN7
= V
CC
, V
PIN5
> V
th
, Full range 4 mA
V
PIN2
= GND, All other pins open
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Product Folder Link(s): MC33063A-Q1