LM3490IM5-12 datasheet(2/17 Pages) TI1

Part #	LM3490IM5-12

Description	LM3490 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator with Logic-Controlled ON/OFF

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Manufacturer	TI1 [Texas Instruments]

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LM3490

SNVS012E – JUNE 1999 – REVISED APRIL 2013

www.ti.com

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)

Input Voltage (IN to GND)

35V

Voltage ON/OFF to GND

5.5V

Power Dissipation(3)

400 mW

Junction Temp. (TJ)

(3)

+150°C

Ambient Storage Temp.

−65 to +150°C

Wave

4sec., 260°C

Soldering Time, Temp.(4)

Infrared

10sec., 240°C

Vapor Phase

75sec., 219°C

ON/OFF

1.0kV

ESD(5)

All Other Pins

2.0kV

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is specified. Operating Ratings do not imply ensured performance limits. For ensured performance limits and

associated test conditions, see the Electrical Characteristics tables.

(2)

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

specifications.

(3)

The Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using P = (TJ - TA)/θJA where TJ

is the junction temperature, TA is the ambient temperature, and θJA is the junction-to-ambient thermal resistance. The 400 mW rating

results from substituting the Absolute Maximum junction temperature, 150°C, for TJ , 50°C for TA, and 250°C/W for θJA. More power can

be safely dissipated at lower ambient temperatures. Less power can be safely dissipated at higher ambient temperatures. The Absolute

Maximum power dissipation can be increased by 4 mW for each °C below 50°C ambient. It must be derated by 4 mW for each °C above

50°C ambient. A

θJA of 250°C/W represents the worst-case condition of no heat sinking of the 5-lead plastic SOT-23 package. Heat

sinking enables the safe dissipation of more power. The LM3490 actively limits its junction temperature to about 150°C.

(4)

Times shown are dwell times. Temperatures shown are dwell temperatures. For detailed information on soldering plastic small-outline

packages, see http://www.ti.com.

(5)

For testing purposes, ESD was applied using the human-body model, a 100 pF capacitor discharged through a 1.5 k

Ω resistor.

OPERATING RATINGS

(1)

Maximum Input Voltage (IN to GND)

30V

Voltage ON/OFF to GND

0 to 5V

Junction Temperature (TJ)

−40 to +125°C

Maximum Power Dissipation(2)

300 mW

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is specified. Operating Ratings do not imply ensured performance limits. For ensured performance limits and

associated test conditions, see the Electrical Characteristics tables.

(2)

As with the Absolute Maximum power dissipation, the maximum power dissipation for operation depends on the ambient temperature.

The 300 mW rating appearing under Operating Ratings results from substituting the maximum junction temperature for operation,

125°C, for TJ, 50°C for TA, and 250°C/W for θJA in P = (TJ − TA)/θJA. More power can be dissipated at lower ambient temperatures. Less

power can be dissipated at higher ambient temperatures. The maximum power dissipation for operation appearing under Operating

Ratings can be increased by 4 mW for each °C below 50°C ambient. It must be derated by 4 mW for each °C above 50°C ambient. A

θJA of 250°C/W represents the worst-case condition of no heat sinking of the 5-lead plastic SOT-23 package. Heat sinking enables the

dissipation of more power during operation.

2

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