MAX809LEUR+T10

Power management integrated circuit (PMIC) is a very important part of electronic device design, as it has the responsibility for efficient usage of power and for preserving important parts against critical conditions. Supervisors are components used by a PMIC to monitor voltage levels, detect the presence of power, and accurately control power "on" and "off" states. The MAX809LEUR+T10 is a popular supervisor chip that is used by many electronic designers today. This article will explain the application field and working principle of this chip.

Application Field of MAX809LEUR+T10

The MAX809LEUR+T10 is a voltage supervisor chip intended to be used on multiple power supplies, both with and without external interrupt services. A low quiescent current operation at both high and low voltages indepedently makes this chip suitable for low-power applications such as cell phones, tablet PCs, and other digital devices. The low requirement of VDD (1.6V to 5.5V) makes the chip reliable and workable in most power supply scenarios. Even with its low power configuration, the MAX809LEUR+T10 still provides supervisory functions during power-on reset (POR), power-off reset (PFR), and overvoltage monitoring.

The MAX809LEUR+T10 also provides integrated failsafe monitors and resets for multiple, separate power supply systems. The failsafe function requires an input voltage of between 2.7V and 5.5V, and can hold the system in reset if the voltage drops below 3.0V. This integrated system allows for extremely reliable resetting and prevents data corruption during power losses and system resets.

The MAX809LEUR+T10 chip has a wide range of applications due to its wide voltage range, low power requirements, and integrated failsafe reset functionality. It is particularly suited to mobile devices, such as cell phones, tablet PCs, and digital cameras, but can also be used in home electronics, automotive systems, and many other industrial-level applications.

Working principle of MAX809LEUR+T10

The MAX809LEUR+T10 supervisor chip operates by monitoring the voltages of multiple supplies. The chip contains three comparators that individually compare the input voltage to fixed thresholds, such as power-on reset (POR) and power-off reset (PFR). These comparators alert the chip when the voltage drops below the predetermined threshold, resulting in the generation of a reset signal.

When the reset has been triggered, the chip sends out a reset signal to the system it is attached to. The reset signal will reset the system and set any required configuration registers and associated logic. Once the reset condition has been cleared, the chip will reset itself and will again monitor the voltage. This process happens constantly and automatically, so that the system is reset whenever an unexpected voltage drop occurs.

In addition to resetting the system, the MAX809LEUR+T10 supervisor chip also contains an integrated system that is able to detect an overvoltage condition on up to two separate power supplies. This system is able to send out a reset signal when an overvoltage condition is detected, thus preventing any damage to the system caused by the high voltage level.

The MAX809LEUR+T10 chip also provides low current operation, allowing the chip to be used in mobile applications, such as cell phones and tablets, where power consumption is of utmost concern. The chip consumes an average of only 0.25uA, which is much lower than most other voltage supervisors on the market.

Overall, the MAX809LEUR+T10 chip is a reliable and efficient supervisor chip that is suitable for multiple power supply applications. Its wide voltage range, low power consumption, and integrated failsafe reset system make it a viable choice for many different power supply requirements. The chip is particularly suitable for mobile applications, where its low power consumption can help to extend battery life.