LM809M3X-4.00

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Power Management Integrated Circuits (PMIC) are special microelectronic devices designed to regulate power flow in modern electronic systems. In particular, PMICs ensure that power is not only available when it\'s required, but is also consumed efficiently and in the task-appropriate form. Supervisors are a type of PMICs that have the particularity of supervising energy sequences during power-up, power-down and emergency shutdown sequences. In this article, we will take a look at one of the most popular supervisors in the Power Management Integrated Circuits family, the LM809M3X-4.00, and discuss its application field and working principles.

The LM809M3X-4.00 is a three-channel supervisor IC used to monitor and protect voltages on microcontroller applications and power-supplies. It offers simultaneously active Brown-out and over-voltage protection and it complies with the latest ANSI/TIA-568-C.2.1 and IEC 61131-2 standards. This device supports a wide range of voltage levels, with -0.3V to +16V on the power rail and -3V to +3V on the signal rail. In addition, the LM809M3X-4.00 features a low power consumption with a wide temperature range (-40 to 130°C).

The LM809M3X-4.00 works through a combination of several components:

• Supervisory IC: supervises voltage levels within the working range and issues an alert as soon as the pre-programmed voltage levels are exceeded.
• Output comparators: compares a signal to a reference voltage and generate an output signal to either reset a system or prevent it from booting up.
• Over-voltage protection: detects voltages exceeding the pre-programmed levels and blocks further current flow.

The LM809M3X-4.00 can be used in a wide range of applications including power supplies, CPU protection, battery systems, embedded systems, and automotive electronics. For instance, it can be used to protect outputs of integrated circuits like microcontrollers and processors, which are vulnerable to over-voltage and short-circuits. Additionally, it can also help to protect systems from a power-related fault and to indicate that voltage levels are within a safe range. Moreover, the LM809M3X-4.00 includes numerous useful features such as integrated fault indicators and a wide -3V to +3V signal range allowing designers to more easily and accurately measure voltage levels.

The LM809M3X-4.00 is a very versatile device and its application field is wide, ranging from consumer applications to industrial ones. However, thanks to its very low power consumption, integrated fault indicators, and wide temperature and voltage range, the LM809M3X-4.00 is especially suitable for use in high-temperature and/or harsh industrial environments where power management and over-voltage protection are essential.

To sum up, the LM809M3X-4.00 is a three-channel supervisor IC built to monitor and protect the voltage levels for microcontroller applications and power-supplies. It ensures that within a wide temperature and voltage range, the pre-defined levels are not exceeded and couples with integrated fault indicators and a low power consumption, making it suitable for a wide range of applications, from consumer to industrial ones.

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