Datasheet

MC33063A
MC34063A
SLLS636M –DECEMBER 2004– REVISED JANUARY 2011 www.ti.com
Output Switch
(1)
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 μA
(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 μs 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.
Comparator
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
ΔV
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
Total Device
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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