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PMIC – Voltage Regulators – Linear + Switching

Voltage regulators are used in a wide range of products and while they are not complex they are essential parts of any power supply design. There are two main types of voltage regulators, linear and switching, each with their own advantages and disadvantages. The LT3500HMSE#PBF is an example of a linear regulator, so let\'s take a closer look at its application field and working principle.

Application field

The most common application for the LT3500HMSE#PBF is to provide a stable output voltage from a variable input voltage. It is designed to operate between 8V and 32V, making it well-suited for applications such as DC/DC converters and automotive electronics. It provides a ripple rejection of 68 dB and is capable of converting large input voltage steps and transients into a regulated output voltage. This makes it ideal for applications that require a stable power supply.

This regulator also features a low stand-by current of 10 uA, making it extremely efficient. The wide input voltage range also makes it ideal for applications where the input voltage is varying due to environmental factors, such as temperature or vibration.

Working principle

The LT3500HMSE#PBF is a linear regulator, so the voltage drop across it is constant. This means that, when a load is applied, the output voltage will drop proportionally. This is different from a switching regulator, which excess energy is dissipated as heat and the output voltage usually remains constant.

The linear regulator works by comparing the input and output voltages. If the output voltage is lower than the input voltage, the regulator will allow current to flow through to the load, thus raising the output voltage. If the output voltage is higher than the input voltage, the regulator will turn off, thus reducing the output voltage.

The LT3500HMSE#PBF is a high-efficiency linear regulator, capable of delivering up to 3A of current with a maximum voltage drop of 0.6V. This makes it ideal for applications that require a high current, low voltage drop regulator.

Conclusion

The LT3500HMSE#PBF is an excellent linear voltage regulator, capable of providing a stable output voltage over a wide range of input voltages. It is ideal for applications that require a high current, low voltage drop regulator, such as DC/DC converters and automotive electronics. We hope this article has provided a better understanding of the LT3500HMSE#PBF application field and working principle.

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