LD3985G47R

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The LD3985G47R is a high efficiency, low noise voltage regulator specifically designed for switching mode power supplies (SMPS) and other low voltage DC-to-DC converters. With its advanced topology and high-frequency operation, the LD3985G47R provides an effective and reliable solution for modern low voltage applications. The LD3985G47R is a high-efficiency linear voltage regulator, operating over a wide input/output voltage range of 4.5V - 42V and a maximum output current of 1.5A. This device is also designed to have a low noise level, making it suitable for audio and digital applications.

The LD3985G47R has a wide range of application fields, primarily used in high-efficiency, low-noise power supplies, LED lighting circuits, and other low voltage DC-to-DC converters. It is also suitable for use in industrial and consumer electronics, medical and mil aerospace equipment, and automotive electronics. The device can also be used in noise-sensitive applications such as audio amplifiers and digital receivers.

The LD3985G47R works on the principle of linear voltage regulation. It is designed to maintain a constant output voltage at its output regardless of variations in input voltage, temperature or load variation. The device produces this effect by using a control scheme in which an integrated error amplifier compares the output voltage with a reference voltage. The error signal is then fed to a pulse width modulation (PWM) controller, which drives a power switch.

The output voltage of the device is determined by the compensation circuit, which is regulated by a duty cycle set using an external resistor. The duty cycle of the PWM depends on the amount of voltage drop across the switching element, the output voltage and the input voltage. The control loop is then closed by the feedback compensation circuit, which senses the output voltage and adjusts the duty cycle accordingly.

The LD3985G47R has two pairs of output pins: the first pair provides an adjustable output voltage, while the second pair is an adjustable current limit pin. This provides additional flexibility for applications requiring precise voltage and current regulation.

Overall, the LD3985G47R is a high efficiency, low noise voltage regulator specifically designed for switching mode power supplies and other low voltage DC-to-DC converters. Its advanced topology and high-frequency operation make it a great choice for modern low voltage applications, with a wide range of application fields from industrial and consumer electronics to automotive. With its linear voltage regulation, adjustable output voltage and adjustable current limit pins, the LD3985G47R is a reliable and efficient solution for designers.

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