MAX693AESE+

Series:	--
Packaging:	Tube
Part Status:	Active
Type:	Battery Backup Circuit
Number of Voltages Monitored:	1
Output:	Push-Pull, Push-Pull
Reset:	Active High/Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	4.4V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	MAX693

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MAX693AESE+ PMIC - Supervisors

The MAX693AESE+ is a high-performance, low-power microcontroller supervisor optimized for battery-operated applications. The MAX693AESE+ is a two-terminal supervisor specifically designed for successful operation in both low-voltage and high-voltage applications. The device provides long-term protection for the core of a microcontroller-based system, either a system-on-chip (SOC) or a digital signal processor (DSP).The MAX693AESE+ features a wide operating range, an integrated reset timer, and optional safeguard for accurate reset detection. These features make the MAX693AESE+ ideal for solid-state electronic systems, such as battery-supported devices, that require long-term protection from over-voltage or power-on reset spikes.

Application Field

The MAX693AESE+ is best suited to applications that require low power consumption and minimal space in order to maximize system reliability and longevity. The supervisor is ideal for monitoring power supplies in portable consumer and industrial products, such as cellular phones, PDAs, digital cameras, embedded systems, instrumentation, and portable data acquisition devices. The MAX693AESE+ excels at monitoring low power supplies (1.2 V to 5.5 V) and is used in a wide range of applications that require prolonged system protection from over-voltage conditions such as brownouts, power-on-reset spikes, and power surges.

Working Principle

The MAX693AESE+’s built-in reset timer allows it to monitor the power supply and accurately determine when it falls below preset voltage thresholds. The MAX693AESE+ then keeps track of the system’s response to low-voltage conditions and can activate a system reset when necessary.The supervisor monitors the power supply continuously and holds the system reset active while it is below the predetermined threshold. When the power supply voltage recovers and the threshold is exceeded, an internal timer is enabled and waits for a fixed period of time before releasing the reset. This provides an off-time delay after the voltage reaches the desired level, allowing the system to stabilize before returning to an operating state.The MAX693AESE+ also features an optional safeguard for accurate reset detection. The safeguard prevents false reset activations due to noise on the power supply line. The safeguard distinguishes between a real over-voltage event and a momentary spike caused by noise or a brief over-voltage moment. In the case of a false reset, the reset remains active for only a few microseconds and then returns to normal.

Conclusion

The MAX693AESE+ is an ideal solution for applications that require long-term protection from over-voltage or power-on reset spikes. With a wide operating range, an integrated reset timer, and optional safeguard, the MAX693AESE+ protects microcontroller-based systems while minimizing power consumption and space requirements.

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