MAX709LESA+

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The MAX709LESA+ is a type of familiar Supervisors in the PMIC (Power Management Integrated Circuit) field. It is a supervisor IC that provides a robust solution for monitoring input voltages and triggering an output when the voltage exceeds an upper threshold voltage (UVLO).

The MAX709LESA+ supervisor is used in a variety of applications in PMIC. Some examples include digital television, scanners, personal computers, printers, mobile and wireless telecommunication devices, and other consumer products. It is also ideal for a variety of other applications, including those involving micro-controllers, LCD controllers, and various low-power battery-powered devices.

The main feature of the MAX709LESA+ is its highly accurate, low-noise, battery supervision with extended battery life. It provides an adjustable undervoltage lockout that can be set from 2V to 7.5V with an accuracy of ±1.2%. The active-low reset output freewheels low to avoid power-down sequencing. It also offers a full-time dual-output system reset capability and an open-drain active-high enable output.

Functionally speaking, the MAX709LESA+ is a single supply, ultra-low-power, reset circuit supervisor. The MAX709LESA+ includes two comparators, one active-low outputs and one active-high outputs. It has a 10ms max delay time and features an adjustable power-good reset threshold. Its wide input range (2-7.5V) allows for flexibility in accommodating various supply voltages.

The MAX709LESA+ is designed to provide detect circuits for overvoltage, under voltage, and overcurrent. It is activated when an input voltage exceeds the preset threshold, causing an active-low reset signal to be issued on the reset output. During a reset event, it generates an active-low reset signal regardless of the state of the enable pin. After the input voltage is verified to be within a predetermined range, the reset signal is deactivated and the enable output is converted to active-high to indicate that the input voltage is operating within safe limits.

The MAX709LESA+ also features an active-high enable output that can be used to enable and disable the internal circuitry. The enable control allows the system to enter into a low-power sleep mode and wake up again when an external low-voltage signal is applied. It also provides an open-drain active-high enable output for powering up other devices in the system.

In addition, the MAX709LESA+ offers user-programmable delay times and reset threshold levels, enabling applications to customize the supervisor for their specific needs. It also integrates thermal protection to protect against voltage surges, as well as built-in ESD (electro-static discharge) protection.

In conclusion, the MAX709LESA+ is a reliable solution for power management in a variety of applications. It is a highly accurate, low-noise, battery supervision IC with extended battery life. It features an adjustable undervoltage lockout threshold, active-low reset output, dual-output system reset capability, and an open-drain active-high enable output. It also provides an adjustable power-good reset threshold, extendable delay times, and integrates thermal protection as well as ESD protection.

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