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LM340-MIL

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SNOSD64 – JUNE 2017

Product Folder Links: LM340-MIL

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Copyright © 2017, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The LM340-MIL device is a fixed-output positive-voltage regulator with outputs ranging from 3 V to 15 V. The

device accepts up to 35 V of input voltage and, with proper heat dissipation, can provide over 1.5 A of current.

With a combination of current limiting, thermal shutdown, and safe area protection, this regulator helps eliminate

any concern of damage. These features paired with excellent line and load regulation make the LM340-MIL

device a versatile solution to a wide range of power management designs. Although the LM340-MIL device was

designed primarily as fixed-voltage regulators, the device can be used with external component for adjustable

voltage and current.

7.2 Functional Block Diagram

7.3 Feature Description

7.3.1 Output Current

With proper considerations, the LM340-MIL device can exceed 1.5-A output current. Depending on the desired

package option, the effective junction-to-ambient thermal resistance can be reduced through heat sinking,

allowing more power to be dissipated in the device.

7.3.2 Current Limiting Feature

In the event of a short circuit at the output of the regulator, each device has an internal current limit to protect it

from damage. The typical current limits for the LM340-MIL device is 2.4 A.

7.3.3 Thermal Shutdown

Each package type employs internal current limiting and thermal shutdown to provide safe operation area

protection. If the junction temperature is allowed to rise to 150°C, the device will go into thermal shutdown.

7.4 Device Functional Modes

There are no functional modes for this device.