CAT1161W45

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Power Supply Supervisors are a critical component of the integrated forms of mobile and portable products. By limiting their functionality to the task of monitoring, controlling, and maintaining the necessary load components, the supervisors help to reduce overall power consumption and minimize EMI. Put simply, power supply supervisors are devices that make sure the power supply is operating properly and alerting the user to any anomalies in the power supply. The CAT1161W45 is a high-performance supervisory circuit available in a low power 8-lead wafer-level package (WLP) that is tailored to reduce the size and cost of various consumer applications.

The CAT1161W45 is an exceptionally powerful supervisor circuit that provides a full range of features to improve the safety and reliability of consumer applications. The device has a slew of features designed to maintain power supply health and stability. These high-end functions include precision voltage monitoring of up to 5 input supply voltages, adjustable over-voltage protection for 2 voltages, adjustable under-voltage protection for 1 voltage, an adjustable reset timeout, as well as two power-on reset outputs, one of which is active-low. In addition, the CAT1161W45 offers adjustable reset and interrupt thresholds, programmable reset and interrupt levels, and individually programmable power-on reset and interrupt outputs.

The CAT1161W45 is specifically tailored for mobile, portable and consumer applications requiring a low standby current. With a very low quiescent current consumption of just 30µA (typical) at 125°C, the device is a preferable choice for technological products that require a smaller footprint, increased battery life, and improved electronic device performance. Additionally, the CAT1161W45 is designed to operate on voltages between 1.6V to 5.5V and offers a low voltage reset threshold of up to 1.2V.

The CAT1161W45 features an integrated watchdog timer, adjustable reset timeout (two timeouts available), and an active-low reset output. Watchdog timers are used to detect any unexpected lockups due to software errors and errors in communication interface units. In addition to reset timeout and watchdog timer, the CAT1161W45 also has dead-time protection, which helps prevent lockups when operating on long power supply rails.

The CAT1161W45 eliminates the use of external components to protect from brief under-voltage and over-voltage conditions. The two integrated adjustable over-voltage circuits with programmable voltage levels and adjustable transient response time are designed to protect an application from over-voltage faults. Similarly, the single integrated adjustable under-voltage circuit is designed to protect the application against under-voltage conditions.

The CAT1161W45 also offers two power-on reset outputs with independently programmable reset and interrupt levels. The reset output is low at power-on while the interrupt output is high at reset. This helps to ensure that any voltage spikes, overshoots and undershoots are prevented from entering either the power supply or the circuitry. The adjustment unit allows the device to be programmed to match the application’s particular requirements.

The CAT1161W45 is a low power supervisor tailored for consumer-level applications. Its small form-factor enables it to be integrated into compact consumer products, providing improved power savings and protection from over-voltage and under-voltage conditions. The device\'s wide operating voltage range and low reset threshold make it a cost effective solution for a range of consumer electronics such as cell phones, PDAs, portable gaming consoles, and other portable electronics.

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