LTC1798CS8#TRPBF

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Projects requiring low voltage secondary power supplies are commonly encountered among various applications. It is sometimes a challenge to achieve low voltage precision while staying within current and thermal dissipation limits. The LTC1798 family, as part of Linear Technology\'s regulator solution, offer precision, low dropout linear regulators that are easy to implement. One specific part among the LTC1798 family is the LTC1798CS8#TRPBF. It is specifically designed for the most demanding low-voltage supplies applications, like mobile and battery-powered applications.

Introduction

The LTC1798CS8#TRPBF is a low dropout linear regulator which is able to maintain tight line/load regulation, even with very low dropout voltages. This part is specified for an output voltage of 0.8V and it has a voltage accuracy of 0.8%Vref. It is capable of delivering up to 300mA supply current and has a typical quiescent current of 10 uA.

The LTC1798 family is capable of delivering a 250mV dropout and it comes with a high power-supply rejection and low noise performance which is required in precision low-voltage applications. Furthermore, it is identified as a voltage reference which makes it suitable for many applications.

Application and Working Principle of the LTC1798CS8#TRPBF

The LTC1798CS8#TRPBF is a voltage reference, mainly used in microcontrollers and other low voltage applications. It can be used to regulate a low and/or high input voltage to a precise 0.8V and also be used to reference low-voltage analog signals of up to 1.5V. It can also be used as a local reference for precision data converters when higher precision is needed.

The LTC1798CS8#TRPBF utilizes a voltage reference which converts a steady voltage into a steady current. This current is then buffered and voltage referenced. The internal voltage reference, along with an external transistor, forms a negative feedback loop which maintains a constant output voltage even when changes in the input voltage occur. The voltage reference controls the output voltage and also monitors temperature changes. The temperature protection circuit also keeps the output voltage very stable within an operating range of -40°C to +85°C.

Advantages of the LTC1798CS8#TRPBF

The LTC1798CS8#TRPBF is able to provide high output accuracy with a voltage accuracy of 0.8 %Vref. It also has a very low quiescent current of only 10 uA, making it well-suited for battery-powered or other energy-limited applications. It has a low dropout voltage of 250 mV and it has a high power supply rejection which makes it ideal for precision low-voltage applications.

The temperature protection circuit will keep the output voltage very stable within an operating range of -40°C to +85°C. It also comes with a built-in thermal shutdown feature which will protect the device from thermal damage by shutting it down if it exceeds its specified operating temperature range. Additionally, the LTC1798CS8#TRPBF has short-circuit protection to prevent output current from exceeding the specified limit.

Conclusion

This article has discussed the application and working principle of the LTC1798CS8#TRPBF, a low-dropout linear regulator which is suitable for low-voltage supplies applications. It is able to maintain tight line/load regulation, high precision, low noise performance and a low quiescent current of 10uA. It is equipped with several features such as temperature protection, short-circuit protection and high power supply rejection making it the ideal choice for precision low-voltage supplies applications.

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