lm5006mmx National Semiconductor Corporation, lm5006mmx Datasheet - Page 16
lm5006mmx
Manufacturer Part Number
lm5006mmx
Description
80v, 600 Ma Constant On-time Buck Switching Regulator
Manufacturer
National Semiconductor Corporation
Datasheet
1.LM5006MMX.pdf
(20 pages)
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LOW OUTPUT RIPPLE CONFIGURATIONS
For applications where low output ripple is required, the fol-
lowing options can be used to reduce or nearly eliminate the
ripple.
a) Reduced ripple configuration: In
across R
pin. This allows the ripple at V
of 25 mVp-p by reducing R3, since the ripple at V
attenuated by the feedback resistors. The minimum value for
Cff is determined from:
FB2
to AC-couple the ripple at V
OUT
to be reduced to a minimum
Figure
FIGURE 5. Efficiency vs. Load Current and V
OUT
directly to the FB
7, Cff is added
FIGURE 6. Efficiency vs. V
OUT
is not
16
where t
minimum input voltage. The next larger standard value ca-
pacitor should be used for Cff.
ON(max)
IN
is the maximum on-time, which occurs at the
IN
30113124
30113128
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