LP8340IDTX-2.5

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LP8340IDTX-2.5 is a linear voltage regulator from Texas Instruments which belongs to the PMIC - Voltage Regulators - Linear Series. It applies to a wide range of applications. This article will talk about the application field, the working principle, and the key features and benefits of LP8340IDTX-2.5.

Application Field

The LP8340IDTX-2.5 is designed to deliver up to 3A of load current without needing an external pass transistor. It is suitable for providing regulated supply voltage to motors, microcontrollers (MCUs), and other high-current load applications. It can also be used for end-of-line or system monitor functions. Additionally, the LP8340IDTX-2.5 is suitable for applications for automotive, consumer, industrial, and medical applications.

Working Principle

The LP8340IDTX-2.5 utilizes a linear current control loop to deliver a precise output voltage. It integrates a constant-current-controlled MOSFET, an error amplifier, a reference voltage reference, an external current sensing resistor and a logic level PWM control circuitry. The internal control loop limits the output current to a user-defined programmed value. This current limit is independent of the output voltage, making the LP8340IDTX-2.5 particularly suitable for current-controlled applications. As the load current decreases, the voltage of the external sensing resistor decreases and the current is decreased by the internal constant current control loop. This ensures that the output current and/or the output voltage stays constant regardless of the load.

Key Features and Benefits

The LP8340IDTX-2.5 provides a wide variety of features such as wide input voltage range, constant current programming with output voltage, frequency dithering, and a logic level pulse-width modulation (PWM) control. Its wide input voltage range enabling a wide range of applications with a wide input voltage range from 4.5V to 46V. The LP8340IDTX-2.5 also provides constant current programming with output voltage across a wide voltage range from 0.8V to 3.3V. This feature allows the user to precisely control a load current. An additional feature offered by the LP8340IDTX-2.5 is frequency dithering, which provides noise reduction and improved EMI performance.

The LP8340IDTX-2.5 also contains a logic level PWM control which enables it to be compatible with the most popular MCUs on the market and will integrate easily into layouts that require PWM control from an MCU. The LP8340IDTX-2.5 further provides protection against over-temperature, short-circuit, reverse-voltage, over-voltage and under-voltage conditions.

In summary, LP8340IDTX-2.5 provides a wide variety of features and benefits that make it suitable for a broad range of applications. Its wide input voltage range, constant current programming, frequency dithering, and logic level PWM control provide maximum versatility and make it an attractive choice for applications needing a precise voltage delivery with high current load. Furthermore, its many protection features ensure its safe use in most applications.

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