LF35ABDT-TR

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LF35ABDT-TR is a precision shunt voltage regulator designed to provide a stable voltage under varying load conditions. The device senses the output voltage inside a closed-loop configuration, and uses pulse width modulation (PWM) to maintain the output at a preset voltage level.

The LF35ABDT-TR is used in a large number of applications in the electronics industry, such as medical, military, automotive, communication, consumer, and industrial electronics. It is particularly useful for powering microprocessor-based monitoring and control systems, where a precise and stable output is required. The device is also ideal for applications that require a power supply to be shut down quickly.

The working principle of the LF35ABDT-TR is based on a feedback loop, where the output voltage is compared to a reference voltage. If the output voltage is too low, the reference voltage is shifted higher, and as the output voltage approaches, the output voltage is driven low until it is just higher than the reference voltage. When the output voltage is too high, the reference voltage is shifted lower and the output voltage is driven higher until it is just lower than the reference voltage.

The overall circuit of the device consists of an operational amplifier (opamp) serving as the error amplifier, a shunt transistor acting as the current control element, and two drivers - one driver is used to turn off the shunt transistor when the output voltage falls below the reference voltage and the other is used to turn off the shunt transistor when the output voltage rises above the reference voltage.

The LF35ABDT-TR is featured with a wide temperature range from -40°C to +85°C and features various protection mechanisms including over temperature, under voltage, and overcurrent protections. The device also features low noise, high efficiency, low power dissipation, and is supplied in a compact package. It is also available in fixed 3.3V, 5V, 3A, 5A and adjustable output voltage versions.

In conclusion, the LF35ABDT-TR is a precision shunt voltage regulator designed to provide a stable voltage under varying load conditions in a wide range of applications. The device is suitable for a variety of applications that require a stable power supply and is available in a range of fixed and adjustable output voltage versions.

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