Datasheet

SHUTDOWN
INPUT
ON
OFF
0
+5V
V
CC
COMP/SD
LM3477
COMP/SD
LM3477
SHUTDOWN
INPUT
OFF
ON
0
+5V
LM3477
SNVS141K –OCTOBER 2000–REVISED MARCH 2013 www.ti.com
Figure 23. Implementing Shutdown in LM3477
Figure 24. Implementing Shutdown in LM3477
Design Section
GENERAL
Power supply design involves making tradeoffs. To achieve performance specifications, limitations will be set on
component selection. The LM3477/A provides many degrees of flexibility in choosing external components to
accommodate various performance/component selection optimizations. For example, the internal slope
compensation can be externally increased to allow smaller inductances to be used. The design procedures that
follow provide instruction on how to select the external components in a typical LM3477/A buck circuit in
continuous conduction mode, as well as aid in the optimization of performance and/or component selection. See
Figure 25 for component reference and typical circuit. The LM3477/A may also be designed to operate in
discontinuous conduction mode.
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