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MC33063AD 数据表(PDF) 3 Page - Texas Instruments

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部件名 MC33063AD
功能描述  1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

MC33063AD 数据表(HTML) 3 Page - Texas Instruments

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Recommended Operating Conditions
Electrical Characteristics
Oscillator
Output Switch
(1)
Comparator
Total Device
MC33063A, MC34063A
1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS
SLLS636J – DECEMBER 2004 – REVISED OCTOBER 2005
MIN
MAX
UNIT
VCC
Supply voltage
3
40
V
MC33063A
–40
85
TA
Operating free-air temperature
°C
MC34063A
0
70
VCC = 5 V, TA = full operating range (unless otherwise noted) (see block diagram)
PARAMETER
TEST CONDITIONS
TA
MIN
TYP
MAX
UNIT
fosc
Oscillator frequency
VPIN5 = 0 V, CT = 1 nF
25
°C
24
33
42
kHz
Ichg
Charge current
VCC = 5 V to 40 V
25
°C
24
35
42
µA
Idischg
Discharge current
VCC = 5 V to 40 V
25
°C
140
220
260
µA
Idischg/Ichg
Discharge-to-charge current ratio
VPIN7 = VCC
25
°C
5.2
6.5
7.5
VIpk
Current-limit sense voltage
Idischg = Ichg
25
°C
250
300
350
mV
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 = I
C,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.
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
∆V
th
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
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
3


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