MAX16919DGEE/V+T

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Power management integrated circuits (PMICs) are a key component of today\'s digital systems. They allow system designers to regulate a wide range of low-voltage, medium-voltage, and high-voltage power supplies in a single integrated circuit. This specialized type of PMIC is the MAX16919DGEE/V+T, an onboard low-dropout (LDO) regulator for automotive infotainment systems and other demanding applications.

Description

The MAX16919DGEE/V+T is a 3.3V LDO power management device that has a maximum output current rating of 1.2A (typical). It offers outputs of 1.3V, 1.5V, 1.8V, and 3.3V, settling to a maximum tolerance of 5%. It has a low quiescent current draw of only 4µA, making it suitable for automotive infotainment systems that operate in "always-on" mode.

The device also features a wide input voltage range of 3.0V to 18V. It has built-in protection features including reverse-battery protection, over-current protection, over-temperature protection, and reverse-current protection. In addition, the MAX16919DGEE/V+T also offers full ESD protection. The device is supplied in the 10-pin HVQFN package, making it suitable for a wide range of applications.

Application Field

The MAX16919DGEE/V+T is suitable for a wide range of automotive infotainment systems and other conditions where optimum power management and reliability are critical. Automotive infotainment systems typically include audio sources such as radio, CD, DVD, and satellite radio as well as GPS navigation, display systems, front and rear view cameras, and more. Other applications can also benefit from the use of this device and may include wireless access points, wireless LANs, gaming consoles, home automation systems and industrial automation systems.

Working Principle

The MAX16919DGEE/V+T is an LDO regulator, which means it regulates the output voltage to a predetermined value below the input voltage. This is done via an error amplifier which monitors the output voltage and adjusts the gate drive of a power transistor, when necessary, in order to obtain the desired output. The error amplifier also has a slew rate control circuit for enhanced stability and an active current limit circuit, which prevents the power transistor from drawing excessive current during start-up.

The device is designed to offer improved system performance and reliability by reducing interference and providing a regulated output power supply. It also reduces thermal stress associated with temperature fluctuations, by spreading the power load among several power transistors and automatically selecting the transistor with the lowest dynamic resistance. This, in turn, prevents audible switching noise and increases the longevity of the system, while also reducing power dissipation and improving efficiency.

Conclusion

The MAX16919DGEE/V+T is a specialized type of PMIC which offers an ideal solution for automotive infotainment systems and other demanding applications. It combines a wide input voltage range of 3.0V to 18V with a maximum output current rating of 1.2A (typical). In addition, it offers numerous onboard protections, such as reverse-battery protection, over-current protection, over-temperature protection and reverse-current protection. With its 10-pin HVQFN package, the MAX16919DGEE/V+T is the ideal choice for applications that require up-to-date power management and reliability.

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