LP2980-ADJ Datasheet, PDF(4/9 Page) National Semiconductor (TI) – Micropower SOT, 50 mA Ultra Low-Dropout Adjustable Voltage Regulator

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LP2980-ADJ Datasheet, PDF (4/9 Pages) National Semiconductor (TI) – Micropower SOT, 50 mA Ultra Low-Dropout Adjustable Voltage Regulator

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Electrical Characteristics (Continued)

Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the de-

vice outside of its rated operating conditions.

Note 2: The ESD rating of pins 3 and 4 is 1 kV.

Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, Î¸J-A, and

the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using:

The value of Î¸J-A for the SOT-23 package is 300ËC/W. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator

will go into thermal shutdown.

Note 4: If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2980-ADJ output must be diode-clamped to ground.

Note 5: The output PNP structure contains a diode between the VIN and VOUT terminals that is normally reverse-biased. Reversing the polarity from VIN to VOUT

will turn on this diode (see Application Hints).

Note 6: Limits are 100% production tested at 25ËC. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control

(SQC) methods. The limits are used to calculate Nationalâs Average Outgoing Quality Level (AOQL).

Note 7: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a 1V differential.

Note 8: The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to Application Hints.

Note 9: See Typical Performance Characteristics curves.

Typical Performance Characteristics Unless otherwise specified: TA = 25ËC, VIN = VO(NOM) + 1V,

IL = 1 mA, ON/OFF pin tied to VIN, RADJ = 86.6k, and test circuit is as shown in Basic Application Circuit.

Output Voltage vs. Temperature

Dropout Characteristics

Dropout Voltage vs. Temperature

DS100001-5

Dropout Voltage vs. Load Current

DS100001-6

www.national.com

DS100001-7

DS100001-8

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