MAX691ACPE+

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Power management integrated circuit (PMIC), also known as power management chip, is a kind of integrated circuit (IC) which includes several power management functions. It is mainly used to manage the power supply of a system, and eliminate the need to use more than one chip to control the system power supply. Depending on its capabilities and functions, PMIC is generally classified into four different categories: voltage regulators, power converters, power supervisors, and interface controllers.

MAX691ACPE+ belongs to the power supervisors category of PMIC. It is mainly used to detect an over/under voltage situation in a system and provide a reset signal when it is triggered. This reset signal can then be used to shut down the system or reset system peripherals. Moreover, the MAX691ACPE+ also provides a manual reset input, pushbutton reset input, power-good output, and low-voltage-detect output.

The MAX691ACPE+ application field is mainly focused on power monitoring. It can be used in computers, electronic devices, portable devices, microcontrollers, and many consumer products. With the help of its pushbutton input reset, the MAX691ACPE+ can be used to quickly and accurately reset the system if an unexpected power failure occurs. Besides, it can also be applied to power-on reset, manual reset, brown-out reset, and watchdog timer reset applications, which makes it very popular in the consumer products industry.

Now let’s talk about the working principle of MAX691ACPE+. Its core element consists of a comparator, connected in series to a Manual Reset input and a Pushbutton Reset input. When the voltage falls below the reset threshold, the comparator’s output will go low and switch into the reset state. At this point, the output signals of the low-voltage-detect output, the power-good output, the pushbutton reset input and the manual reset inputs will all be reset.

To prevent the outputs from randomly resetting, the MAX691ACPE+ also includes a low-leakage power supply rejection route and a latch-off circuit to keep the output signals low until the voltage returns above the reset threshold. This reset function and latch-off feature ensure that the system is reset only if it is really necessary and that the system continues to stay in the safe operating area.

The MAX691ACPE+ is thus a highly efficient PMIC for providing reliable power monitoring and maintaining power stability. With its manual reset input, pushbutton reset input, power-good output, and low-voltage-detect output, it is ideal for a variety of industries, such as computers, electronic devices, microcontrollers and various other consumer products.

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