LM25574QMT/NOPB

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The LM25574QMT/NOPB is a versatile DC-DC switching regulator from Texas Instruments. It is ideal for applications in which an adjustable output voltage is desired, such as in vehicles, consumer electronics and industrial equipment. This regulator provides high efficiency operation with a wide input range, adjustable output current limit and an integrated temperature monitor.

Features

• Input voltage range of 2.7 V to 36 V
• High efficiency up to 95%
• Input/output differential voltage up to 2.7 V
• Integrated temperature monitor
• Adjustable output current limit

Application Fields

The LM25574QMT/NOPB is optimized for automotive and industrial applications. The wide input range makes it suitable for operating off of the battery of a car, heavy machinery and other vehicles. It is ideal for applications requiring an adjustable output voltage, such as in electric vehicles, consumer electronics and process control.

Working Principle

The LM25574QMT/NOPB operates on a synchronous buck-boost converter topology. This topology is used when converting a voltage below, equal to or greater than the output voltage. The regulator is driven by two external 5V logic outputs. An integrated temperature monitor provides protection against over-temperature. The regulator can be configured in PWM or continuous conduction mode.

The input voltage is converted to an intermediate voltage level and fed to the regulation loop. The regulation loop senses the output voltage and adjusts the duty cycle of the switching pulses, thus controlling the output voltage. The output voltage can be adjusted to a desired level using adjustable external resistive dividers. The regulator offers adjustable output current limit for overload protection.

Conclusion

The LM25574QMT/NOPB is a versatile DC-DC switching regulator from Texas Instruments. Its wide input range and adjustable output current limit make it suitable for a variety of automotive and industrial applications. It operates on a synchronous buck-boost converter topology and can be configured in PWM or continuous conduction mode. The integrated temperature monitor provides protection against over-temperature.

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