LM109H

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Linear voltage regulators are one of the main types of power management integrated circuits (PMIC), used to provide regulated output voltage with minimal ripple or noise. They compare the output voltage with a precise reference voltage and continuously adjust the load until the two are equal. The LM109H from Texas Instruments is a type of linear voltage regulator that offers improved power efficiency and transient response. This article will discuss its application field and working principle.

Application Field

The LM109H linear voltage regulator is designed for applications that require high output current, such as hand-held products, automotive electronics and power supplies. Its output current capability of up to 5A is ideal for high current applications. It is especially suitable for high efficiency applications as it has low power dissipation and can operate over a wide temperature range.

Features

The LM109H is an advanced technology, low drop-out (LDO) linear voltage regulator. It benefits from a small footprint and thermally enhanced packaging that enable it to provide high output currents without the need for large heatsinks. The regulator is available in fixed output voltage configurations ranging from 1.5V to 10V, with adjustable versions also available. It features low power dissipation, low noise and fast transients, with a peak load current of 30A. It also has short circuit protection, wide operating temperature range and high ripple rejection, making it an ideal choice for a range of high current applications.

Working Principle

The LM109H is a linear voltage regulator, which works on the principle that when the input voltage is greater than the reference voltage a mismatch is created, resulting in a voltage difference. The regulator then compensates for this difference by adjusting the load current until the output voltage is equal to the reference voltage. The LM109H also adjusts the load current when the input voltage or output load changes. This ensures that the output voltage remains consistent and the required current is maintained.

Conclusion

TheLM109H linear voltage regulator is an advanced LDO regulator with high output current capability suitable for a wide range of applications. It features improved power efficiency, low power dissipation and fast transients, with a peak load current of 30A. Its operating principle works by constantly adjusting the load current to maintain the output voltage. Its small size and thermally enhanced package make it particularly suitable for high current applications.

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