Datasheet

LM4041-N, LM4041-N-Q1
www.ti.com SNOS641F –OCTOBER 1999–REVISED JULY 2013
• V
O
is the output voltage. The actual value of the internal V
REF
is a function of V
O
. The “corrected” V
REF
is
determined by (1)
V
REF
= ΔV
O
(ΔV
REF
/ΔV
O
) + V
Y
where
• V
Y
= 1.240 V
and
• ΔV
O
= (V
O
− V
Y
) (2)
ΔV
REF
/ΔV
O
is found in the Electrical Characteristics and is typically −1.55 mV/V. You can get a more accurate
indication of the output voltage by replacing the value of V
REF
in Equation 1 with the value found using
Equation 2.
Note that the actual output voltage can deviate from that predicted using the typical value of ΔV
REF
/ΔV
O
in
Equation 2: for C-grade parts, the worst-case ΔV
REF
/ΔV
O
is −2.5 mV/V. For D-grade parts, the worst-case
ΔV
REF
/ΔV
O
is −3.0 mV/V.
Typical Applications
Figure 20. Shunt Regulator
V
O
= V
REF
[(R2/R1) + 1]
Figure 21. Adjustable Shunt Regulator
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