L9659TR

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The L9659TR is a member of STMicroelectronics\' range of low-dropout linear voltage regulators. The L9659TR is a 3-terminal, +5V output device intended for applications requiring low-dropout performance without resorting to the use or a high-current step-up regulator.

The L9659TR is a low-dropout voltage regulator which operates from a +4.75V to +24V input supply and can deliver up to 150mA of output current. The IC is available in TO-220 and three-terminal Ultra Small packages and is designed for use in communication, computer, consumer and industrial control applications. The IC is designed to provide cost effective and reliable solution with low dropout voltage and improved transient response.

The L9659TR offers an impressive combination of design features. It employs a high PSRR, low dropout voltage, fast transient response and low output voltage ripple. The integrated over-voltage protection circuitry offers maximum system reliability in the presence of faults // //

L9659TR Application Field and Working Principle

The L9659TR is suitable for a range of low-noise, low-dropout linear voltage regulator applications including communications, computer, consumer and industrial control applications. Its narrow dropout voltage ensures that stable voltage levels are maintained for a wide range of input-to-output conditions, enabling reliable operation in battery-powered applications.

The working principle of the L9659TR is quite straightforward. It features an on-chip voltage reference and transistor, used to monitor the output voltage. When the output voltage drops below the reference voltage, the transistor is triggered, allowing more current to flow across the resistor and raising the output voltage. When the output voltage reaches the desired level, the transistor is turned off and the current is cut off. The process is repeated as circulation.

The IC also features an integrated over-voltage protection circuit, providing additional protection in the event of a fault condition. The IC uses an externally adjustable current limiting technique to protect against shorted connection and excessive load conditions.

The IC is designed to operate at a wide range of temperatures, from -40°C to +125°C, and supports a wide range of input and output voltages. In order to provide optimal performance, the IC also features a low-noise output, making it suitable for audio applications.

Overall, the L9659TR is an extremely versatile and reliable linear voltage regulator, suitable for a wide range of applications. It features low-dropout and high-efficiency performance, giving it a distinct edge over other traditional regulators. Its integrated over-voltage protection circuitry ensures maximum system reliability, even in the presence of mild faults.

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