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MC33063A Folha de dados(PDF) 3 Page - Texas Instruments

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Nome de Peças MC33063A
Descrição Electrónicos  1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
Logo TI - Texas Instruments

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SLLS636D – DECEMBER 2004 – REVISED MARCH 2005
MC33063A, MC34063A
1.5A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
MIN
MAX
UNIT
VCC
Supply voltage
3
40
V
TA
Operating free-air temperature range
MC33063A
−40
85
°C
TA
Operating free-air temperature range
MC34063A
0
70
°C
electrical characteristics, VCC = 5 V, TA = full operating range (unless otherwise noted) (see block
diagram)
OSCILLATOR
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
OUTPUT SWITCH (see Note 3)
PARAMETER
TEST CONDITIONS
TA
MIN
TYP
MAX
UNIT
VCE(sat)
Saturation voltage – Darlington
connection
ISW = 1 A, pins 1 and 8 connected
Full range
1
1.3
V
VCE(sat)
Saturation voltage – non-Darlington
connection (see Note 4)
ISW = 1 A, RPIN8 = 82 Ω to VCC,
forced
b  20
Full range
0.45
0.7
V
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
NOTES:
3. Low duty-cycle pulse testing is used to maintain junction temperature as close to ambient temperature as possible.
4. 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
b 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.
COMPARATOR
PARAMETER
TEST CONDITIONS
TA
MIN
TYP
MAX
UNIT
Vth
Threshold voltage
25
°C
1.225
1.25
1.275
V
Vth
Threshold voltage
Full range
1.21
1.29
V
∆Vth
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
TOTAL DEVICE
PARAMETER
TEST CONDITIONS
TA
MIN
MAX
UNIT
ICC
Supply current
VCC = 5 V to 40 V, CT = 1 nF,
VPIN7 = VCC, VPIN5 > Vth,
VPIN2 = GND, all other pins open
Full range
4
mA


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