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MC34063ADR2 View Datasheet(PDF) - ON Semiconductor

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MC34063ADR2 Datasheet PDF : 15 Pages
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MC34063A, MC33063A, SC34063A, SC33063A, NCV33063A
8
1
Vout
8
R
1
Vout
7
Rsc
Vin
6
7
2
Rsc
Vin
6
2
R ³ 0 for
constant Vin
Figure 10. External Current Boost Connections for IC Peak Greater than 1.5 A
9a. External NPN Switch
9b. External NPN Saturated Switch
(See Note 8)
8. If the output switch is driven into hard saturation (nonDarlington configuration) at low switch currents (300 mA) and high driver currents
(30 mA), it may take up to 2.0 ms 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, since the output switch cannot saturate. If a
nonDarlington configuration is used, the following output drive condition is recommended.
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