TPS73HD301PWPR Integrated Circuits (ICs)

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TPS73HD301PWPR Application Field and Working Principle

The TPS73HD301PWPR is a low-dropout linear voltage regulator. It belongs to the family of linear voltage regulators and is categorized in the PMIC (power management integrated circuit). It is designed primarily for powering high-performance processors used in portable applications such as cell phones and handheld computing devices, so it offers best-in-class performance and low operating current.

The TPS73HD301PWPR operates with a wide input voltage range of 2.7V to 5.5V, making it useful for systems operating from a variety of power sources. The regulator features an adjustable output voltage from 0.8V to 3.3V and provides a maximum load current of 400mA. The device is available in SOT-23 and microSMD surface mount packages and incorporates internal short-circuit and thermal overload protection.

Working Principle

The TPS73HD301PWPR is a voltage regulator that uses a PNP power transistor to control the output voltage between an adjustable minimum and maximum set points. A feedback circuit allows the regulator to compare the output voltage with a precise reference voltage and then adjust the base current into the transistor so it can control the output voltage. The output voltage is also kept from exceeding the maximum voltage by limiting the base current that is fed into the transistor based on the number ofmA being drawn from the regulator.

Additionally, the TPS73HD301PWPR can be set to a low dropout voltage mode, which enables the device to continue regulation at a lower input voltage. This allows the device to reduce the power usage of the regulator when the voltage supply to the system is in a low voltage condition.

The device also utilizes a thermaloverload protection circuit. The thermal overload protection circuitry limits the peak power dissipation by automatically reducing the base current when the junction temperature exceeds the peak power dissipation. The thermal overload protection circuit also shuts off the regulator when the peak power dissipation is exceeded.

Applications

The TPS73HD301PWPR is mainly used in applications where low dropout voltage and high output current are desired. It is well-suited for powering high-performance processors used in portable applications such as cell phones and handheld computing devices. Additionally, this device is suitable for applications where battery life or efficiency is critical due to its low operating current and low dropout voltage.

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