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MC34063A Datasheet(PDF) 5 Page - Texas Instruments

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Part No. MC34063A
Description  1.5-A Peak Boost/Buck/Inverting Switching Regulators
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

MC34063A Datasheet(HTML) 5 Page - Texas Instruments

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MC33063A, MC34063A
www.ti.com
SLLS636N – DECEMBER 2004 – REVISED JANUARY 2015
7.6 Electrical Characteristics—Output Switch
VCC = 5 V, TA = full operating range (unless otherwise noted) (see block diagram)
(1)
PARAMETER
TEST CONDITIONS
TA
MIN
TYP
MAX
UNIT
Saturation voltage –
VCE(sat)
ISW = 1 A, pins 1 and 8 connected
Full range
1
1.3
V
Darlington connection
Saturation voltage –
ISW = 1 A, RPIN8 = 82 Ω to VCC,
VCE(sat)
Full range
0.45
0.7
V
non-Darlington connection(2)
forced
β ∼ 20
hFE
DC current gain
ISW = 1 A, VCE = 5 V
25°C
50
75
IC(off)
Collector off-state current
VCE = 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 = IC,SW / (IC,driver – 7 mA) ≥ 10, where ∼7 mA is required by the 100-Ω resistor in the emitter of the driver to
forward bias the Vbe of the switch.
7.7 Electrical Characteristics—Comparator
VCC = 5 V, TA = full operating range (unless otherwise noted) (see block diagram)
PARAMETER
TEST CONDITIONS
TA
MIN
TYP
MAX
UNIT
25°C
1.225
1.25
1.275
Vth
Threshold voltage
V
Full range
1.21
1.29
ΔVth
Threshold-voltage line regulation
VCC = 5 V to 40 V
Full range
1.4
5
mV
IIB
Input bias current
VIN = 0 V
Full range
–20
–400
nA
7.8 Electrical Characteristics—Total Device
VCC = 5 V, TA = full operating range (unless otherwise noted) (see block diagram)
PARAMETER
TEST CONDITIONS
TA
MIN
MAX
UNIT
VCC = 5 V to 40 V, CT = 1 nF,
ICC
Supply current
VPIN7 = VCC, VPIN5 > Vth,
Full range
4
mA
VPIN2 = GND, All other pins open
Copyright © 2004–2015, Texas Instruments Incorporated
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