MAX6888EETE+

Power management integrated circuits (PMICs) are used for power management and control in wide variety of systems. Supervisors are specialized types of PMICs which are used for monitoring and maintaining system power states and providing protection against power fluctuations. A typical example of a supervisor is the MAX6888EETE+, and this article will discuss its application field, working principle and features.

Applications

The MAX6888EETE+ is a precision reset IC specifically designed for wearable devices, such as digital cameras, media players, and data loggers, which require high-performance reset functions and noise resilience. It is suitable for applications in which the resetting time needs to be short and reliable, especially those operating on limited power supplies.

Working Principle

The MAX6888EETE+ works by monitoring conditions which indicate system instability, including VDD detection, brown-out conditions, or level changes on an external pin. When one of these conditions is met, the MAX6888EETE+ will produce a reset signal and the system will reset itself. This reset signal can be configured to be active-high, active-low, or both.

The MAX6888EETE+ also provides low-voltage, low-leakage power-on reset control, which prevents oscillations in the power supply. It monitors the condition of the power supply and sends a reset signal when the voltage drops below a certain threshold. This prevents power supply related malfunctions by restarting the system without waiting for a manual reset.

Features

The MAX6888EETE+ has many features that make it well suited for use in wearables and other small form factor devices. It has an active reset output and a manual reset input, both of which can be configured to be active-high, active-low, or both. It also has an adjustable reset timer, and an adjustable sense voltage for detecting various voltage levels. The reset output is open drain and requires an external pull-up resistor. The MAX6888EETE+ also has a low operating voltage (from 0.55V to 4.2V) and low on-chip resistance (1Ω typical).

The MAX6888EETE+ is very robust and reliable, and has built-in circuitry to protect against transient voltage spikes. It also has a patented time-delay-on-output circuit, which ensures that the non-overlapping output signals always have a positive on-time. These features make it ideal for use in wearables and other applications with narrow power margins.

Conclusion

The MAX6888EETE+ is a specialized power supervisor designed for use in wearable and other small form factor devices. It monitors the system for various conditions which indicate instability, and provides protection against voltage drops and transient voltage spikes. Its adjustable reset timer and adjustable sense voltage make it suitable for various applications, and its robust and reliable features make it well suited for use in wearables and other devices with narrow power margins.