LM4041
Electrical Characteristics (continued)
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
Jmax
(maximum junction temperature),
θ
JA
(junction to
ambient thermal resistance), and T
A
(ambient temperature). The maximum allowable power dissipation at any temperature is PD
max
= (T
Jmax
− T
A
)/θ
JA
or the
number given in the Absolute Maximum Ratings, whichever is lower. For the LM4041, T
Jmax
= 125˚C, and the typical thermal resistance (θ
JA
), when board mounted,
is 326˚C/W for the SOT-23 package, 415˚C/W for the SC70 package and 180˚C/W with 0.4" lead length and 170˚C/W with 0.125" lead length for the TO-92 package.
Note 3:
The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin. All pins are rated at 2kV for Human Body Model, but the feedback pin which is rated at 1kV.
Note 4:
Typicals are at T
J
= 25˚C and represent most likely parametric norm.
Note 5:
Limits are 100% production tested at 25˚C. Limits over temperature are guaranteed through correlation using Statistical Quality Control (SQC) methods.
The limits are used to calculate National’s AOQL.
Note 6:
The boldface (over-temperature) limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown Voltage Tolerance
±
[(∆V
R
v∆T)(max
∆T)(V
R
)]. Where,
∆V
R
/∆T is the V
R
temperature coefficient, max∆T is the maximum difference in temperature from the reference point of 25 ˚C
to T
MAX
or T
MIN
, and V
R
is the reverse breakdown voltage. The total over-temperature tolerance for the different grades in the industrial temperature range where
max∆T=65˚C is shown below:
A-grade:
B-grade:
C-grade:
D-grade:
E-grade:
B-grade:
C-grade:
D-grade:
E-grade:
±
0.75% =
±
0.85% =
±
1.15% =
±
1.98% =
±
2.98% =
±
1.2% =
±
1.5% =
±
2.5% =
±
4.5% =
±
0.1%
±
0.2%
±
0.5%
±
1.0%
±
2.0%
±
100 ppm/˚C x 65˚C
±
100 ppm/˚C x 65˚C
±
100 ppm/˚C x 65˚C
±
150 ppm/˚C x 65˚C
±
150 ppm/˚C x 65˚C
The total over-temperature tolerance for the different grades in the extended temperature range where max
∆T
= 100 ˚C is shown below:
±
0.2%
±
0.5%
±
1.0%
±
2.0%
±
100 ppm/˚C x 100˚C
±
100 ppm/˚C x 100˚C
±
150 ppm/˚C x 100˚C
±
150 ppm/˚C x 100˚C
Therefore, as an example, the A-grade LM4041-1.2 has an over-temperature Reverse Breakdown Voltage tolerance of
±
1.2V x 0.75% =
±
9.2 mV.
Note 7:
When V
OUT
≤
1.6V, the LM4041-ADJ in the SOT-23 package must operate at reduced I
R
. This is caused by the series resistance of the die attach between
the die (-) output and the package (-) output pin. See the Output Saturation (SOT-23 only) curve in the Typical Performance Characteristics section.
Note 8:
Reference voltage and temperature coefficient will change with output voltage. See Typical Performance Characteristics curves.
Typical Performance Characteristics
Temperature Drift for Different
Average Temperature Coefficient
Output Impedance vs Frequency
DS011392-19
DS011392-4
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