lm9073 National Semiconductor Corporation, lm9073 Datasheet - Page 14

• Manufacturer Part Number: lm9073
• Description: Dual High Current Low-dropout System Regulator
• Manufacturer: National Semiconductor Corporation

www.national.com
Application Information
In the event that an oscillation is present, input bypassing
can also help de-tune the resonance. Figure 7 illustrates two
input bypassing approaches. The straight forward addition of
a larger valued electrolitic capacitor could suffice. In this
case however, if reverse battery connections are possibility it
is necessary to add a series protection diode as shown to
prevent damaging the polarized input capacitor.
An alternative input bypassing scheme is also shown. This
eliminates the use of polarized input capacitors and a series
protection diode. The values shown were derived empirically
in a representative typical application. Appropriate values for
any given application require experimentation.
(Continued)
FIGURE 8. EMC Test Circuit
FIGURE 7. Input Bypassing
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THERMAL MANAGEMENT
The LM9073 is packaged in a narrow lead-pitch TO-220
package. To obtain operation over the highest possible load
current and input voltage ranges, care must be taken to
control the operating temperature of the device. Thermal
shutdown protection is built with a threshold above 150˚C
Conventional heat sinking techniques can be used with the
TO-220 package.
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