RT9161-50GX

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Linear voltage regulators are widely used as the primary source of power supply to control and provide the necessary voltage level to the electronics devices. The RT9161-50GX is a member of a linear regulator series from Richtek Technology Corp. It is designed to provide a versatility of applications for linear voltage regulation for post-regulator and low noise requirements.

Overview of RT9161-50GX

RT9161-50GX offers an adjustable output voltage range of 1.8V to 5V that can be set by external resistors. It uses available output current up to 500mA and low quiescent current with the power-saving mode. The application fields of the device include consumer electronic products, sensors, LED applications, and post-regulator low noise requirements. The device is embedded with the features such as enable control, current limit protection and thermal shutdown. Stable operation can be maintained over a wide operating temperature range from -40°C to 85°C.

Features of RT9161-50GX

RT9161-50GX comes with some of the important features such as:

• It offers robust power supply design with low dropout voltage performance
• It provides fast transient response with stability
• It consists of an enable control function for external power down control
• It consists of current-limit protection from excess load
• It features thermal shutdown at junction temperature 140°C
• It consists of low quiescent current with the power-saving mode
• It is embedded with built-in compensation to allow stable operation
• It offers external-trimmed voltage accuracy over a wide temperature range

Working Principle of RT9161-50GX

The RT9161-50GX is a low dropout (LDO) linear voltage regulator. It consists of four functional blocks including a voltage reference, a PNP pass element, a compensation network, and current limit. In operation, the references voltage produces the necessary DC output voltage using the voltage regulators control pin. This pin is compared to an internal reference and the output is adjusted accordingly. The PNP pass element drives the output voltage using a controlling output current, while the current limit block limits the load current to protect the circuit from fault conditions. The compensation network is used to increase the stability.

Applications of RT9161-50GX

RT9161-50GX voltage regulator can be used for of wide range of applications such as:

• Voltage conversion from USB source
• Post regulator for DC-DC converter
• Power supply for sensor applications
• Post regulator for low noise requirements
• Low quiescent current applications
• Power supply for LED applications

Conclusion

The RT9161-50GX is a linear voltage regulator that provides adjustable output voltage range of 1.8V to 5V to numerous applications such as LED lighting, sensor applications, USB voltage conversion, and low-noise requirements. It offers the features of robust power supply design with low dropout voltage performance, fast transient response with stability, device enable control, current limit protection, and thermal shutdown. Its wide range of applications, design benefits and features make it an ideal choice for linear voltage regulating applications.

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