SP691ACT-L

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PMIC - Supervisors

The SP691ACT-L is an ultra-low power supervisor suitable for a wide range of applications. This versatile device is designed to monitor a system’s supply rail voltage and provide a hardware reset signal to the system when the rail voltage drops below a preset threshold.

This supervisor is well-suited for almost any embedded system, from wearable devices and IoT applications to industrial controllers and medical equipment. It can detect when the power supply rail voltage drops due to brownouts and current surges and will provide a reset signal to the system, preventing data corruption and application malfunction.

Features and Benefits of SP691ACT-L

• Powered directly by the system power supply rail (3V-23V) and highly accurate over a wide operating temperature range
• No external components required, low component count and small footprint
• On-chip reset threshold detector and integrated voltage preregulator to reduce the power rail voltage variation and extend the system’s operating life
• Provides a reset signal to the system within 1 μs
• Integrated power-on reset circuitry ensures reliable system power-up/power-down/standby/wake-up operation
• Low power consumption and high noise immunity
• Internal hysteresis eliminates false triggering due to power rail transients and noise

Working Principle

The SP691ACT-L is based on a voltage detector integrated circuit. It works by sensing the system’s power supply rail voltage and comparing it to a preset threshold. If the rail voltage drops below the threshold, it outputs a rigorous low active-high reset signal to the system.

The device also includes on-chip voltage preregulation so that the system power rail voltage stays within an optimal range. This helps to ensure proper system functioning and prevents data corruption or application malfunction.

The SP691ACT-L features a programmable delay timer, which allows the user to select the desired reset delay time. This delay time can be used to improve system stability and protect the system against unwanted or unexpected resets.

The device also includes integrated power-on reset circuitry which ensures reliable system power-up/power-down/standby/wake-up operation.

Applications

The SP691ACT-L can be used in a variety of applications, such as embedded systems, consumer electronics, industrial controllers, medical equipment, and more. It is ideal for monitoring power supply rails in both stationary and mobile devices, ensuring proper system functionality, power savings, and system reliability.

It is also useful for managing the system’s power supply rail voltage fluctuations, protecting the system against damage or malfunction due to current surges and brownouts.

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