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In these equations C
2
is always the output capacitor of the circuit.
(1)
where R
SW
is the sum of the ON resistance of the internal switches. R
SW
is typically 1.4 Ω for the LM2661,
0.9 Ω for the LM2663, and 4 Ω for the LM2664.
(2)
Figure 2. Silkscreen
4
AN-1142 LM2661/3/4 Evaluation Board SNVA014C–November 1999–Revised April 2013
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