LP2981-N datasheet(2/24 Pages) TI1

2 / 24 page

LP2981-N

SNOS773K – MARCH 2000 – REVISED APRIL 2013

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Connection Diagram

Figure 1. 5-Lead Small Outline Package (SOT-23)

Top View

See Package Number DBV0005A

PIN DESCRIPTIONS

Name

Function

Number

VIN

Input Voltage

GND

Common Ground (device substrate)

ON/OFF

Logic high enable input

N/C

Post package trim - do not connect to this pin

VOUT

Regulated output voltage

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

ABSOLUTE MAXIMUM RATINGS

(1) (2)

Storage Temperature Range

−65°C to +150°C

Operating Junction Temperature Range

−40°C to +125°C

Lead Temperature (Soldering, 5 sec.)

260°C

ESD Rating(3)

2 kV

Power Dissipation(4)

Internally Limited

Input Supply Voltage (Survival)

−0.3V to +16V

Input Supply Voltage (Operating)

2.1V to +16V

Shutdown Input Voltage (Survival)

−0.3V to +16V

Output Voltage (Survival(5))

−0.3V to +9V

IOUT (Survival)

Short Circuit Protected

Input-Output Voltage (Survival,(6))

−0.3V to +16V

(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.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and

specifications.

(3)

The ESD rating of pins 3 and 4 for the SOT-23 package is 1 kV.

(4)

The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal

resistance,

θJA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated

using:

The value of

θJA for the SOT-23 package is 220°C/W. Exceeding the maximum allowable power dissipation will cause excessive die

temperature, and the regulator will go into thermal shutdown.

(5)

If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2981-N output must be diode-clamped

to ground.

(6)

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).

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