LM3350 MWC/NOPB National Semiconductor, LM3350 MWC/NOPB Datasheet - Page 8

• Manufacturer Part Number: LM3350 MWC/NOPB
• Manufacturer: National Semiconductor

Specifications of LM3350 MWC/NOPB

• Lead Free Status / Rohs Status: Compliant

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Typical Application Circuits
Layout Information
LAYOUT CONSIDERATIONS
The LM3350's high switching frequency (800 kHz) makes a
good layout important.
is important to keep the distance short between the four ca-
pacitors and the IC. Wide traces and grounding are also
recommended. These steps will minimize trace inductance
Figure 4
illustrates a typical layout. It
100002 Version 6 Revision 2
FIGURE 3. Step-Down Converter
FIGURE 2. Step-Up Converter
Print Date/Time: 2010/12/28 23:06:13
8
and high frequency ringing. Of the four capacitors, C
C
portant to keep them close to the IC. The ground lead that
C
The location of the diode (D1) used in the step-up configura-
tion is not critical. This diode is only used during the initial turn
on of the IC. D1 is not needed in step-down applications.
low
high
have the highest value of di/dt. It is therefore most im-
and C
low
share should also be kept wide and short.
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high
and