Unless otherwise noted, these specifications apply for V

other limits T

Parameter

Conditions

Typical

(Note 9)

LM20BEP

LM20CEP

LM20SEP

Units

(Limit)

Limits

Limits

Limits

(Note 10)

(Note 10)

(Note 10)

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 6: The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω 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 (

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 in˚C).

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.

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