LT3055EDE-5#TRPBF

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The LT3055 Series, designated as EDE-5, are low-dropout adjustable and fixed voltage linear regulators offering low dropout voltage and low quiescent current. The EDE-5 series offers additional features, such as a low 2.5-V reference voltage, guaranteed precise voltage regulation and a new high-frequency mode switch that allows for higher switching frequencies for increased efficiency. These features make the LT3055EDE-5 an excellent choice for battery powered applications such as cellular telephones and personal digital assistants.

In linear regulators, the voltage regulation is done by a series pass device. The LT3055EDE-5 series achieves this by using a high-quality PNP bipolar transistor based voltage regulator, where the main element is a PNP transistor. The PNP bipolar voltage regulator allows current flow through the device to be precisely regulated, which results in a stable output voltage. The quiescent current of the LT3055EDE-5 series is very low, as the current through the PNP transistor is minimized. This is done by using a low on-resistance, PNP transistor and by using a low reference voltage.

The LT3055EDE-5 series also includes an internal voltage reference, which ensures that the output voltage is precise, and there is no need for any external reference source. This feature helps in achieving excellent regulation, as well as eliminating the need for an external reference to maintain a constant output voltage. The voltage reference also helps in reducing noise, as the reference voltage does not fluctuate and is always inside the desired range.

The LT3055EDE-5 series also incorporates a new high-frequency mode switch that allows for increased switch frequencies for increased efficiency. The frequency of the switching depends on the output load and the regulator’s internal temperature. The output load is detected by the voltage reference and the internal temperature is determined by the current sensors inside the device. The measured values are then used to determine the optimal switching frequency, which is then used to regulate the output voltage.

Another great feature of the LT3055EDE-5 series is the low dropout voltage. The dropout voltage of this series is around 7mV, which makes it ideal for battery powered applications. This low dropout voltage ensures that the device can consistently deliver precise output voltage even when the battery voltage drops. The low dropout voltage also helps in reducing power consumption, as the device does not need to draw too much current in order to maintain the output voltage.

In summary, the LT3055EDE-5 series from Linear Technology is a great choice for applications requiring low dropout voltage, precise regulation and high switching frequencies. This series offers excellent performance and is ideal for battery powered applications, such as cellular telephones and personal digital assistants. The high-frequency mode switch helps in achieving greater efficiency, while the low dropout voltage ensures that the device consistently delivers precise output voltage even when the battery voltage drops.

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