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MC34063AD Datasheet(PDF) 7 Page - Texas Instruments

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Part No. MC34063AD
Description  1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

MC34063AD Datasheet(HTML) 7 Page - Texas Instruments

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8
7
6
1
2
R*
* R " 0 for constant Vin
8
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VOUT
RSC
VIN
RSC
VIN
VOUT
a) EXTERNAL npn SWITCH
b) EXTERNAL pnp SATURATED SWITCH (see Note A)
MC33063A
MC34063A
www.ti.com
SLLS636L – DECEMBER 2004 – REVISED DECEMBER 2009
A.
If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (
≤300 mA) and
high driver currents (
≥30 mA), it may take up to 2 μs to come out of saturation. This condition will shorten the off time
at frequencies
≥30 kHz and is magnified at high temperatures. This condition does not occur with a Darlington
configuration because the output switch cannot saturate. If a non-Darlington configuration is used, the output drive
configuration in Figure 7b is recommended.
Figure 7. External Current-Boost Connections for IC Peak Greater Than 1.5 A
Copyright © 2004–2009, Texas Instruments Incorporated
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Product Folder Link(s): MC33063A MC34063A


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