TPS3305-33DRG4

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Power management integrated circuits (PMICs) are commonly used in consumer electronics, automotive, and industrial applications. Supervisory circuits are a subset of PMICs which are used to ensure system reliability by monitoring voltage and current levels and triggering warnings or corrective actions when the levels are out of tolerance. A typical supervisory circuit is the Texas Instruments TPS3305-33DRG4.

Overview of the TPS3305-33DRG4

This device is an ultra-low power multi-channel supervisor circuit used to monitor and protect power supplies from undervoltage and overvoltage events. It is used mainly in automotive and industrial applications but can also be used in consumer applications. This device has an operating temperature range of -40°C to +125°C and is packaged in a 4-pin SOT-23 package.

The TPS3305-33DRG4 Application Field and Working Principle

The TPS3305-33DRG4 provides two voltage comparators with separate inputs for each channel. It can compare up to two different voltages simultaneously with low current consumption (1μA typical). This device also has a slew rate limiting function to limit the rate of change of the voltage output.

The TPS3305-33DRG4 is mainly used in automotive and industrial applications, such as fuel pumps, ECUs, and other power related equipment. It is also suitable for consumer applications such as mobile phones, tablets and other battery powered products. It is designed to monitor the input voltage and to take corrective actions such as disconnecting the load when the voltage rises above the overvoltage threshold or falls below the undervoltage threshold. It can also be used to limit the rate of change of the output voltage, reducing the inrush current during system start up.

TPS3305-33DRG4 Features and Benefits

The TPS3305-33DRG4 has several features which make it an attractive option for power monitoring and protection applications. These features include:-

• Low power consumption: The TPS3305-33DRG4 is designed to be operated with low current (1μA typical) for a long battery life in portable applications.
• Slew rate limiting: This protects the system from excessive inrush currents on power up.
• Programmable hysteresis and input threshold accuracy: The input threshold accuracy allows for efficient monitoring and switching of loads.
• Wide operating temperature range: The TPS3305-33DRG4 operates over a wide temperature range (-40°C to +125°C) guaranteeing reliable protection and monitoring.
• Small SOT-23 package : This allows for easy integration and higher density designs.

Conclusion

The TPS3305-33DRG4 is a multi-channel ultra-low voltage supervisor ideal for monitoring and protecting against undervoltages and overvoltages in automotive and industrial applications as well as in consumer devices such as mobile phones and tablets. It has low power consumption, programmable hysteresis and input threshold accuracy, wide operating temperature range and small SOT-23 package which make it a versatile solution for a variety of power management applications.

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