Inductor Value Selection Guides (For Continuous Mode Operation) (Continued)
PROCEDURE (Adjustable Output Voltage Versions)
5. Input Capacitor (CIN) An aluminum or tantalum
electrolytic bypass capacitor located close to the regulator is
needed for stable operation.
EXAMPLE (Adjustable Output Voltage Versions)
5. Input Capacitor (CIN) A 100 µF aluminum electrolytic
capacitor located near the input and ground pins provides
sufficient bypassing.
To further simplify the buck regulator design procedure, National Semiconductor is making available computer design software to
be used with the Simple Switcher line of switching regulators. Switchers Made Simple (version 3.3) is available on a (31⁄
")
2
diskette for IBM compatible computers from a National Semiconductor sales office in your area.
www.national.com
16
NSC [ National Semiconductor ]
