TPS76625D

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TPS76625D is a simple and robust linear voltage regulator, which belongs to the PMIC (Power Management IC) family. It operates in the voltage range of 2 V to 5.5 V and is suitable for applications such as automotive sensing, over-/under-voltage protection, low-dropout (LDO) regulation, and dc-dc buck converter regulation. Its working principle is incredibly straightforward, with no heavy electronic components needed. The device is composed of an N-channel depletion-mode field effect transistor (FET) and a driver circuit at the input side, and an error amplifier, a resistive voltage divider, and an output transistor at the output side. This operational transconductance amplifier with FET input (OTA-FET) architecture eliminates the need for additional bias current and voltage sources.

At the input side, an N-channel FET is driven by the driver circuit and senses input voltage as low as 2 V. This allows the TPS76625D to be easily driven by battery-powered or automotive-portable applications even when subjected to various transients. The driver circuit can also be used to enhance noise immunity by suppressing transients. The output side of the device consists of an error amplifier, a resistive voltage divider, and an output transistor. The voltage divider is adjustable to set a desired output voltage within the operating range. In addition, there is a wide operating range from 2 V to 5.5 V, which enables users to design the power-supply topology to meet a wide range of applications.

The input-to-output-voltage drop of the TPS76625D is very low; typically 0.5 V at 100 mA. This makes it suitable for applications that require accurate power regulation and without the need for external bias current or voltage sources. The device also has a thermal shutdown protection feature effective at 150°C, which further safeguards the device against accidental or continuous overload. Another notable feature is its low current consumption, which is typically less than 5 μA. This results in a power-saving feature, enabling the device to be used in portable applications.

The TPS76625D has several applications in industrial, automotive, and consumer-electronics markets. It can be used for over-/under-voltage sensing and protection in an automotive power-supply system, or for providing an exact output voltage from a battery-powered or dc-dc buck converter. Also, since it has very low dropout, it is an ideal option for automotive and portable applications, where accurate voltage regulation is essential. The device is also capable of handling up to 100 mA of continuous output current without the need for external components.

To summarize, TPS76625D is a low-dropout and versatile linear voltage regulator that offers low consumption and shutdown protection. Its versatile input-to-output voltage range enables users to design power-supply topologies that meet a wide range of applications, ranging from over-/under-voltage protection and dc-dc buck converters, to low-dropout regulation and power-saving. The device also provides excellent noise immunity and accurate output voltage, making it ideal for automotive, industrial, and consumer-electronics applications.

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