TPS73630DBVR

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The TPS73630 DBVR is a Low-Dropout (LDO) linear voltage regulator that provides a precision regulated output voltage. The device is designed to provide up to 150mA of output current with output voltage options of 1.5V, 1.8V and 2.5V. The TPS73630 operates from a 2.5V to 6V input voltage range, making it suitable for a wide range of applications. It offers high power efficiency and a very low quiescent current of typically 10µA.

The DBVR is capable of providing tight output voltage regulation with a very low dropout voltage. It has a wide output voltage range and is capable of providing a regulated output voltage even when the input voltage is lower than the regulated voltage. This makes it suitable for applications where the input voltage can fluctuate and the output must remain stable. The device has a maximum input-output differential (commonly referred to as the dropout voltage) of 350mV at full load, which ensures that the output voltage stays within its specified limits even at low input voltage.

The TPS73630 includes integrated protection features such as short-circuit protection, over-voltage protection and thermal shutdown to ensure that the output voltage remains within its specified limits. The device also features shutdown and soft-start circuitry to reduce inrush current and improve startup time.

Its major application field covers point-of-load (POL) power conversion, and its typical application is as a point-of-load DC-DC converter supplying simple voltage to various loads. The TPS73630DBVR provides a regulated voltage output in a low-cost and small footprint and is particularly well suited for portable applications where form factor and minimal energy consumption are key requirements. It is also suitable for products powered from battery, such as portable medical equipment, smart phones and tablets where precise output levels must be maintained despite large fluctuations in the input voltage due to the presence of batteries and power converters.

The working principle of TPS73630DBVR is based on a linear voltage regulator (LDO). In an LDO, as the name implies, the output voltage is regulated by a linear relationship between the input and output, without the use of switching elements. The device contains a pass transistor, which is connected in series with a voltage reference and an error amplifier. The purpose of the pass transistor is to regulate the output voltage in response to the error signal developed by the error amplifier.

When the device is enabled, the voltage reference sets a reference voltage and the error amplifier compares this reference voltage to the actual output voltage of the device. If the output voltage does not match the reference voltage, the error amplifier sends a signal to the pass transistor, which adjusts the resistance of the pass transistor, thus changing the current flowing through the pass transistor and regulating the output voltage. The output voltage remains within its specified limit, despite fluctuations in the input voltage.

The TPS73630DBVR is a versatile, efficient and cost-effective solution for all low-noise, high-efficiency point-of-load applications. With its low dropout voltage and integrated protection features, it offers reliable voltage regulation and improved robustness in various applications. Furthermore, its low quiescent current makes it suitable for battery-operated applications, and its high power efficiency features make it an ideal choice for portable devices.

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