![](http://datasheet.mmic.net.cn/230000/LM20SIBPXEP_datasheet_15592808/LM20SIBPXEP_4.png)
Electrical Characteristics
(Continued)
Unless otherwise noted, these specifications apply for V
+
= +2.7 V
DC
.
Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
; all
other limits T
A
= T
J
= 25C; Unless otherwise noted.
Parameter
Conditions
Typical
(Note 9)
LM20BEP
Limits
(Note 10)
LM20CEP
Limits
(Note 10)
LM20SEP
Limits
(Note 10)
Units
(Limit)
Quiescent Current
Shutdown Current
V
+
≤
+0.8 V
0.02
μA
Note 4:
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 5:
When the input voltage (V
I
) at any pin exceeds power supplies (V
I
<
GND or V
I
>
V
+
), the current at that pin should be limited to 5 mA.
Note 6:
The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin.
Note 7:
See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” or the section titled “Surface Mount” found in any post 1986 National
Semiconductor Linear Data Book for other methods of soldering surface mount devices.
Note 8:
The junction to ambient thermal resistance (
θ
JA
) is specified without a heat sink in still air using the printed circuit board layout shown in
Figure 1
.
Note 9:
Typicals are at T
J
= T
A
= 25C and represent most likely parametric norm.
Note 10:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 11:
Accuracy is defined as the error between the measured and calculated output voltage at the specified conditions of voltage, current, and temperature
(expressed inC).
Note 12:
Non-Linearity is defined as the deviation of the calculated output-voltage-versus-temperature curve from the best-fit straight line, over the temperature
range specified.
Note 13:
Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output due to heating effects can be
computed by multiplying the internal dissipation by the thermal resistance.
Note 14:
Negative currents are flowing into the LM20EP. Positive currents are flowing out of the LM20EP. Using this convention the LM20EP can at most sink 1
μA and source +16 μA.
Note 15:
Load regulation or output impedance specifications apply over the supply voltage range of +2.4V to +5.5V.
Note 16:
Line regulation is calculated by subtracting the output voltage at the highest supply input voltage from the output voltage at the lowest supply input voltage.
Typical Performance Characteristic
Temperature Error vs Temperature
20099925
PCB Layouts Used for Thermal Measurements
20099929
a) Layout used for no heat sink measurements.
20099930
b) Layout used for measurements with small heat hink.
FIGURE 1. PCB Lyouts used for thermal measurements.
L
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