RT9161A-25GG

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Output Configuration:	Positive
Output Type:	Fixed
Number of Regulators:	1
Voltage - Input (Max):	12V
Voltage - Output (Min/Fixed):	2.5V
Voltage - Output (Max):	--
Voltage Dropout (Max):	1V @ 500mA
Current - Output:	500mA
PSRR:	--
Control Features:	--
Protection Features:	Over Current, Over Temperature
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-261-4, TO-261AA
Supplier Device Package:	SOT-223

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RT9161A-25GG Application and Working Principle

PMIC (Power Management ICs) and voltage regulators come in various shapes, sizes and capabilities. One such device which is a linear voltage regulator is the RT9161A-25GG. This voltage regulator offers high efficiency and fast transient response, when used with a proper circuit configuration. This article will provide an overview of the RT9161A-25GG application field, its working principle and some recommended practices for its use.

Application of the RT9161A-25GG

The RT9161A-25GG is a 1A low dropout, low noise linear voltage regulator. It is capable of outputting a maximum fixed output voltage up to 5V, with a typical dropout voltage of 0.4V at full load. This device is suitable for a wide range of applications including portable consumer electronics, networking, computing and other applications. It provides an unrivalled level of performance and efficiency, making it suitable for battery powered devices. Furthermore, it has been designed to fulfill the stringent requirements of most consumer applications, including its low quiescent current (ICCQ) and high PSRR for improved noise performance.

Working Principle of the RT9161A-25GG

The RT9161A-25GG works on the principle of a voltage regulator. It is essentially an electronic amplifier with a gain that adjusts to maintain a constant output voltage, regardless of changes in input voltage, temperature or load. The device works by comparing the output voltage to an internal reference voltage. The reference voltage is compared to an internal control node which adjusts the output current. If the voltage at the control node is lower than the reference, a feedback circuit amplifies the difference to increase the output current, thereby raising the output voltage. Conversely, if the voltage at the control node is higher than the reference, a feedback circuit reduces the output current to reduce the output voltage. This mechanism allows the output voltage to remain stable and independent of changes in the output current, temperature or load.

Recommended Practices for Using the RT9161A-25GG

The RT9161A-25GG should be used in conjunction with proper circuit design to ensure proper operation and performance. Some of these include:

• The input voltage must be higher than the output voltage.
• Proper bypass caps must be used to reduce noise in the regulator.
• The input and output pins must be well decoupled, to reduce noise and spurious switching from the regulator.
• Care must be taken to ensure that the regulator does not enter its thermal shutdown protection mode, by including a proper heat sink and airflow.
• The device should be connected to the appropriate power source and its voltage should lie within its specified operating range.

The RT9161A-25GG is a high-performance linear voltage regulator, which provides a stable output voltage within its specified limits. Adhering to the recommended practices above, along with proper circuit design, will ensure that this device performs as expected in any application.

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