TPS40400RHLR Integrated Circuits (ICs)

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TPS40400RHLR application field and working principle

The TPS40400RHLR is a microprocessor supervisory circuit with an adjustable supply voltage range from 2.45 V to 13.2 V and a wide operating temperature range of -40 °C to 125 °C. It typically provides/acts as a voltage regulator when used as a Primary Side Power Supply (PSPS). This device is designed with a low quiescent current and provides a very accurate system reset time. Features include a supervisor input voltage range, an adjustable voltage output range, variable pull-up current and separate input and output error flags. The TPS40400RHLR is suitable for low power applications, such as cell phones, notebooks, personal digital assistants, etc.

Application field :

The TPS40400RHLR provides low quiescent current, adjustable voltage output range, and accuracy of a system reset, making it an ideal device for a variety of applications including:

• Cell phones
• Notebooks
• Personal digital assistants
• Other low power (3.3 V) applications

Working principle :

The TPS40400RHLR is designed to provide output voltage regulation, as well as reset signal output when the voltage drops below a predetermined value. The device consists of an input section, a supply section, and an output section. The input section has two voltage comparators which monitor the input voltage, and the output section has an active low reset signal. The comparators compare the input voltage to the adjustable supervisor input voltage, and the output stage provides a system reset signal when the voltage drops below the preset value. The supply section provides the necessary power to the device.

The system reset time is determined by a user-selected time interval, which can be adjusted by changing the pull-up current. The device also includes a test pin, which allows the user to check the operation of the device without creating a reset. The TPS40400RHLR is designed to provide a low quiescent current and an adjustable voltage output range, making it suitable for use in low power applications.

Conclusion :

The TPS40400RHLR is a microprocessor supervisory circuit with an adjustable supply voltage range from 2.45 V to 13.2 V and a wide operating temperature range of -40 °C to 125 °C. It typically provides/acts as a voltage regulator when used as a Primary Side Power Supply (PSPS). The device is designed with a low quiescent current and provides a very accurate system reset time. It is suitable for various low power applications, such as cell phones, notebooks, personal digital assistants, etc.

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