TPS2105DG4

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TPS2105DG4 Application Field and Working Principle

The TPS2105DG4 is an ON Semiconductor voltage supervisor IC device made for a wide range of applications. This integrated circuit can be used for monitoring system supply voltages of all types, and for generating reset signals for any system. It is a very versatile IC device, as it can be used in a variety of configurations to perform multiple functions.

Classification and Features

This device falls in the power management integrated circuit (PMIC) category, specifically into the OR controllers, ideal diodes segment. It features a low profile, small form factor design and can operate over a wide temperature range of -40°C to 85°C. The reset and reset disable outputs are pushed hence eliminating the need to provide pull-up resistors and making them independent of system power supply. In addition, this device supports 2.2V and 3.3V operation.

Device Variations

This device is available in various configurations to meet design needs. Devices with undervoltage lockout capabilities, reset timeout and low reset TTL logic are also available. In addition, this device can operate over a wide range of supply voltages ranging from 1.2V to 5.5V. Moreover, there is an existing device variation which supports reverse voltage protection.

Application Field

The TPS2105DG4 can be used in a variety of applications thanks to its multiple features and functions. It can be used for monitoring system supplies, such as for motor drivers, as a power supply monitor, or as a reset generator of all types. It can also be used in systems which require reverse voltage protection, and it is ideal for protection of systems which employ communication interfaces such as SPI, RS232 or USB.

Working Principle

The TPS2105DG4 provides an active low (active low means the output is on when the input is low) reset output pin, with a threshold that can be set to any voltage from above 1.2V to 5.5V. The device’s INV pin pulls output pin down for reset activation. When the voltage applied to the input pin goes below the user-defined threshold, the INV pin pulls the reset output pin down. This pin stays active until the voltage drops back below the threshold, or until a timer expires.

When the voltage applied to the input pin exceeds the threshold, the INV pin pulls the reset output pin up. The reset output pin is then set back to its initial state (defined by the on-chip RESET pin) and remains in that state until the voltage drops below the threshold. The RESET pin can also be used to manually reset the device.

Conclusion

The TPS2105DG4 is a very versatile and multi-functional device manufactured by ON Semiconductor. It is a PMIC IC device, which belongs to the OR Controllers, Ideal Diodes segment. The device offers a wide range of features and can be used in a wide range of applications thanks to its multiple reset modes and timer options.

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