Electrical Characteristics (Note 10) (Continued)

Limits in standard typeface are for T

less otherwise specified: V

Symbol

Parameter

Conditions

Typ

LP2985AI-X.X

LP2985I-X.X

Units

(Note 6)

(Note 6)

Min

Max

Min

Max

e

n

Output Noise

BW = 300 Hz to 50 kHz,

Voltage (RMS)

C

30

µV

C

Ripple Rejection

f = 1 kHz, C

45

dB

C

I

Short Circuit Current

R

400

mA

(Note 9)

I

Peak Output Current

V

OUT

≥ V

350

mA

Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the

device outside of its rated operating conditions.

Note 2: The ESD rating of pins 3 and 4 for the SOT-23 package, or pins 5 and 2 for the micro SMD package, is 1 kV.

Where the value of

allowable dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown.

Note 4: For 12V option, output voltage survival: -0.3 to +16V. If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2985

output must be diode-clamped to ground.

turn on this diode.

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

(SQC) methods. The limits are used to calculate National’s 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.

forced to ground (see Typical Performance Characteristics curves).

Note 10: Exposing the micro SMD device to direct sunlight will cause misoperation. See Application Hints for additional information.

Note 11: For 12V option, add 50 µA to all ON state quiescent current values.

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