L5974AD

PMIC - Voltage Regulators - DC DC Switching Regulators

The L5974AD is a highly integrated DC/DC step-down regulator, capable of operating at full power with an input voltage range of 3V to 30V, giving the L5974AD wide application in various electronic systems such as automotive electronics, industrial electronics, power management, and portable devices.

The L5974AD is a non-synchronous step-down switch mode voltage regulator with a peak current mode control. The L5974AD is designed for high efficiency, low noise, high dynamic response, and excellent line and load transient performance in medium to high power applications.

Application Fields:

The L5974AD can deliver up to 2.25A of continuous output current from a 3V to 30V input voltage range and has a wide range of uses across a variety of applications. Some common applications include:

• Automotive electronics
• Power distribution
• Industrial electronics
• Power management
• Portable devices

Working Principle:

The L5974AD is a non-synchronous step-down switch mode voltage regulator with a peak current mode control. It is designed to convert an input voltage range from 3V to 30V into a fixed output voltage of your choice with the maximum output current of 2.25A.

The L5974AD is composed of an internal high-side MOSFET and an internal low-side MOSFET. The high-side MOSFET is connected to the input voltage, while the low-side MOSFET is connected to ground. A current sense resistor is connected to the sensing pin of the low-side MOSFET to sense the output current which is used to regulate the output voltage.

In operation, the L5974AD receives the input voltage and uses the current sense resistor to sense the output current. The output voltage is regulated by comparing the sensed current with a reference voltage such that any change in the output voltage is compensated by adjusting the PWM duty cycle. The PWM signal then drives the internal MOSFETs, controlling the output voltage and current. With a maximum switching frequency of up to 500kHz, the L5974AD is able to reach a high efficiency, low noise operation, and an excellent line and load transient response.