TPS3305-18D

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Introduction

TPS3305-18D is a high-performance, high-power, bidirectional voltage supervisor, voltage comparator, with small package size and fast response. This device is commonly found in a wide range of power system applications, from high-efficiency switching voltage regulators to power management and control applications. The TPS3305-18D can be used for detecting an input voltage that is too low, too high or out of regulation. It can be used for power protection and reset circuit management for other peripherals. This article will introduce the application field and working principle of the TPS3305-18D.

Application Field

The TPS3305-18D is an integrated device with three main functions: voltage supervisor, voltage comparator and reset circuit control. It uses a wide input voltage range of 1.2V to 4.12V, making it suitable for a variety of power management and protection applications. It can be employed to detect over-voltage, under-voltage and out-of-regulation conditions. It can also be used for power-on reset (POR), voltage regulation and power supply sequencing.

The TPS3305-18D has a high-performance output circuit, which is capable of providing an accurate and tightly controlled output voltage, making it suitable for various voltage regulator applications such as low-noise linear regulators, high-efficiency switching regulators and highly reliable, low-dropout (LDO) regulators. The device provides very low standby current consumption, which makes it very suitable for use in battery-powered systems or in applications where power consumption is critical.

The TPS3305-18D is also very suitable for reset circuit control applications. It is capable of providing a reliable and accurate reset signal, with a wide reset threshold range and tight reset timing control. The reset signal is shippable, providing additional flexibility in reset control.

Working Principle

The TPS3305-18D is an integrated device containing various circuit blocks including a voltage supervisor, voltage comparator, POR circuit and reset control circuit. The main function of the device is to provide a reliable, high-performance voltage supervision, comparison and reset control capability.

The voltage supervisor portion of the TPS3305-18D is arranged to monitor the power supply voltage and compare it with a pre-programmed voltage level. When the voltage exceeds or drops below the programmed threshold, the output block is activated and raises an active-low reset signal. When the voltage returns to the pre-programmed voltage level, the output block will reset the active-low signal.

The voltage comparator of the TPS3305-18D is capable of detecting an over-voltage condition. When the voltage exceeds the programmed threshold, the output block is activated and raises an active-high signal. The reset circuit block of the TPS3305-18D is used to provide a reset signal when the input voltage drops below the programmed threshold. The reset signal can be used to reset other peripherals.

The POR circuit of the TPS3305-18D is triggered when the power supply voltage rises above the programmed threshold. The POR circuit will generate a reset signal when the device is powered up, which can be used to ensure that the associated circuits are in a known correct state. The reset control circuit of the TPS3305-18D is used to provide precise control of the reset time and threshold.

Conclusion

The TPS3305-18D is a high-performance, high-power, bidirectional voltage supervisor, voltage comparator and reset control. The device is suitable for a wide range of applications, from high-efficiency switching converters to low-noise linear regulators, from power supply sequencing to power-on reset. The device works by monitoring the voltage and generating a reset signal when it exceeds or drops below the pre-programmed voltage level. It also has precise control over the reset time and threshold.

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