IRU1240CPTR

PMIC - Voltage Regulators - DC DC Switching Regulators

The IRU1240CPTR is a DC-to-DC switching voltage regulator that is designed for applications with high dynamic load current requirements. It is suitable for both boost and buck converter applications, allowing for conversion between input and output voltages up to 55V. The IRU1240CPTR is composed of both linear and switching circuitry to provide fast current mode regulation and high efficiency operation. This means it can efficiently regulate the output voltage while maintaining a fast current-mode regulation at up to 200kHz.

Application Field

The IRU1240CPTR is suitable for applications such as offline-to-online converters, battery chargers, automotive controllers, and various other industrial and consumer applications. It is capable of providing fast transient response, high efficiency, and low system cost in a variety of different voltage and current levels.

Working Principle

The IRU1240CPTR uses a fixed frequency current-mode synchronous buck converter, which employs a Pulse Width Modulation (PWM) control scheme to regulate the converter’s output voltage. In this type of converter, the input voltage is applied to the inductor and the lower-voltage output voltage is taken from the other side of the inductor. By adjusting the duty cycle of the PWM signal, the output voltage can be regulated. The IRU1240CPTR utilizes a propagation-slowed on/off timing scheme for improved efficiency.

The converter also has an internal compensation loop, which is responsible for maintaining fast transient response and stability. As the load current changes, the internal compensation loop will adjust the PWM duty cycle, ensuring the desired output voltage is maintained. Additionally, the IRU1240CPTR is protected against over-current and over-temperature conditions to prevent damage to both the IC itself and the connected components.

Conclusion

The IRU1240CPTR is an ideal solution for applications requiring fast current-mode regulation and high efficiency over a wide range of input and output voltage levels. With its built-in protection features and fast transient response, the IRU1240CPTR provides a reliable, cost-effective solution for a variety of different applications.