L9779-TR Datasheet/PDFPower management integrated circuits (PMICs) play a vital role in managing electricity and regulating loads connected to a power source. In particular, special PMICs are designed to address specific tasks. L9779-TR is a specialized PMIC designed to accept supply voltages from either 12 V or 5 V and provide voltage stepping down to either 3.3 V or 1.2 V.
Overview of L9779-TR
The L9779-TR PMIC is a voltage regulator with integrated switching characteristics. It is ideal for use whenever a stable low voltage is required, such as when supplying digital loads. The device allows for a variety of different output voltages and provides protection against overload and short-circuit conditions.
The device is rated for a maximum continuous current of 10A and is designed to support switching frequencies from 100 kHz to 1 MHz. Furthermore, it features a built-in thermal protection circuit to safeguard itself against overheating, which is an important consideration given the potential power loss associated with switching regulators.
Application Fields
The L9779-TR PMIC can be used in a variety of applications, including industrial, telecom, automotive, and consumer electronic applications. For example, it is well suited for power supply designs requiring multiple output voltages (such as 3.3 V or 1.2 V) within a single package. Additionally, it can be used as a voltage-inverting regulator when the input and output are connected with opposite polarity.
Its features are also beneficial in areas where noise reduction and EMI suppression are required. By reducing electromagnetic interference (EMI), it allows for improved performance and reliability of neighboring components. This makes it particularly valuable in communications and networking applications, where EMI can cause interference between devices.
Finally, its tight output voltage tolerances make it ideal for providing regulated outputs for precision applications such as medical, aerospace, and other industrial applications.
Working Principle
The L9779-TR PMIC works by applying a switching pulse width modulation (PWM) technique. It functions by alternating the output voltage between two high and low switching levels and regulating the average by varying the duty cycle of the switching pulses. This method enables the PMIC to achieve a high efficiency while still maintaining a low ripple and low noise level.
The switching frequency of the PMIC is adjustable, allowing it to achieve higher frequencies while still retaining its output voltage ripple. This means that the device can operate at higher switching frequencies than would be possible with non-switching regulators, allowing it to achieve higher efficiency and improved performance.
Conclusion
The L9779-TR PMIC is an excellent choice for applications requiring a reliable and efficient low-voltage power source. It features adjustable switching frequencies, an integrated thermal protection circuit, and tight output voltage tolerances, making it ideal for a variety of applications. Thanks to its robust design and reliable performance, the L9779-TR PMIC is an excellent choice for any power-sensitive application.