LT3045HDD#PBF

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LT3045HDD#PBF application field and working principle belong to the PMIC - Voltage Regulators - Linear category. This linear voltage regulator is ideal for low-noise, low-current applications. Its high-speed operation and low output noise performance is suitable for applications that need to reduce the effects of PSU noise. Its suppression of external noise is especially ideal for noise-sensitive applications.

The LT3045HDD#PBF is designed to be a single low voltage linear regulator with a maximum single output current of 400mA. It has an adjustable output voltage of 0.8V to 6.0V. It operates over a wide range of input voltages from 2.5V up to 15.5V. The typical dropout voltage at maximum load conditions is 1V. The LT3045HDD#PBF also has a low-power shutdown mode for improved battery life in portable applications.

The LT3045HDD#PBF has a precision integrated reference with a 0.8% accuracy over the full temperature range. It also has an internal thermal protection design to protect the device during overload and a soft-start period during power up, which eliminates glitches and inrush currents. Its low output noise makes the LT3045HDD#PBF ideal for noise sensitive applications such as medical, automotive and industrial applications. Furthermore, the regulator is qualified for automotive AEC-Q100 grade 1 conditions.

The operating principle of LT3045HDD#PBF linear voltage regulator is a two-transistor topology, which uses a pass element to regulate a voltage in proportion to the reference voltage. The circuit compensates for shifts in load current and input voltage through the feedback loop configuration. The voltage drop across the pass element, VDROP, sets the output voltage. The voltage at the REF pin acts as the reference voltage and is the input to the error amplifier. The error amplifier compares the reference voltage to the feedback voltage derived from the output voltage.

If the output voltage is above the reference voltage, the output of the error amplifier increases and drives a P-channel pass transistor. This increases the voltage drop across the pass element, thus decreasing the output voltage until it is equal to the reference voltage. A similar process is performed with the N-channel pass transistor when the output voltage is below the reference voltage. This loop continues until the output voltage and reference voltage are equal. This process is continuous and is termed regulation.

The LT3045HDD#PBF linear voltage regulator offers superior performance in a variety of applications, from low-noise power supplies and DC/DC controllers, to motor controls, digital and telecom circuits. Its wide input range and accuracy in low-voltage and low-current applications make it suitable for a wide range of applications. The device also features an internal thermal protection and soft-start features, which provide improved reliability and performance in design applications.

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