S

A

1

© 2011 Exar Corporation

3/9

Rev. 2.1.0

off time at frequencies above 30KHz, and is magnified at high temperatures. This condition does not occur with a Darlington

configuration, since the output switch cannot saturate. If a non-Darlington configuration is used, the following output drive

condition is recommended.

Forced ß of output switch

10

7

≥

∗

−

=

mA

Driver

I

Output

I

C

C

* The 100Ω resistor in the emitter of the driver device requires about 7.0mA before the output switch conducts.

BLOCK DIAGRAM

Fig. 2: SP34063A Block Diagram

PIN ASSIGNEMENT

Fig. 3: SP34063A Pin Assignment