L4949EDTR-E Integrated Circuits (ICs)

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L4949EDTR-E is a low-power, low-dropout (LDO) linear voltage regulator that provides excellent load and line regulation with minimal external components. L4949EDTR-E is designed for applications requiring up to 1A output current and a transient response type that can handle high step loads. The input voltage range is from 7V to 36V and the output voltage is adjustable from 1.2V to 22V.

Features and Benefits

L4949EDTR-E has many features to offer, some of which include:

• Low standby current consumption: 400nA typical.
• Low quiescent current: 100µA output current at 1.8V, 1A.
• Typ. output voltage accuracy: 0.3%.
• Excellent line and load regulation.
• Fixed Operating frequencies: 100KHz.

Application Fields

Given its features and benefits, L4949EDTR-E is widely used in many applications, including but not limited to:

• Low-noise converters,
• Battery-powered systems and,
• Communication systems.

Working Principle

At any given input voltage, the L4949EDTR-E has a precise output voltage that is provided by the regulation circuit of the linear regulator. It works by applying a variable voltage from the output stage, which is compared to a precise reference voltage and monitored by a feedback loop. If the output voltage is not equal to the reference voltage, the regulator adjusts the control stage so that the desired output voltage is achieved. The control stage then adjusts the output stage, which then controls the output voltage.

To sum up, L4949EDTR-E is a low-power, low-dropout (LDO), linear voltage regulator that offers a precise output voltage. Its features, low standby and quiescent currents, combined with excellent line and load regulation make it suitable for many low-noise converter, battery-powered and communication systems.

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