TPS76915DBVTG4

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The TPS76915DBVTG4 is a low-power, low-dropout (LDO) linear voltage regulator (LVR) designed for advanced handheld and battery-powered applications. As is typical for linear voltage regulators, the inductor-based TPS76915DBVTG4 is designed to provide a stable output voltage with a low dropout voltage across a wide range of temperatures and load current. It also boasts low quiescent current (I_Q), fast transient response, high power supply rejection (PSR), and low output noise. With these features, the TPS76915DBVTG4 is an ideal choice for powering sensitive circuits and microprocessors in mission-critical applications.

The TPS76915DBVTG4 is widely available in both exposed copper-plated copper packages and exposed golden ceramic packages. The exposed copper-plated copper packages have a small size, with a maximum footprint of 1.2 mm2. This small size allows it to be placed in close proximity to other components on the PCB, making it an ideal choice for use in space-constrained applications. Additionally, the exposed golden ceramic package provides superior mechanical strength, ESD protection, and superior thermal and electrical characteristics.

The TPS76915DBVTG4 operates from a 4.5V to 30V input voltage range and has an adjustable output voltage from 0.9V to 24V. The device’s output current capability is 5A for the die side, and 3A for the top side. Other features include a wide sensing temperature range of – 40°C to +125°C, a fast transient response of 5 µs at startup, and a low dropout voltage of 200mV at 5A, making it particularly suitable for power sensitive applications. The TPS76915DBVTG4 also offers excellent EMI performance, with a low output ripple noise of 10 µVrms.

At the heart of the TPS76915DBVTG4 is an inductor-based voltage regulation circuit. This circuit operates using an inductor, a field-effect transistor (FET), an error amplifier, and a reference voltage source. The LDO circuit ensures that no matter the input voltage, the output voltage is regulated to a steady value. The inductor\'s stored energy is released slowly, providing a smooth and even output voltage. The FET is then used to control the current of the inductor, allowing the output voltage to remain constant despite any changes in the load current.

The error amplifier of the TPS76915DBVTG4 compares the feedback voltage with a predetermined reference voltage. If the feedback voltage is lower than the reference voltage, the error amplifier increases the gate voltage of the MOSFET, allowing more current to flow through the inductor. When the feedback voltage is higher than the reference voltage, the error amplifier decreases the gate voltage of the FET, reducing the current flow through the inductor. This process of increasing and decreasing the gate voltage of the FET allows the output voltage of the TPS76915DBVTG4 to remain steady, despite variations in load current, input voltage, and temperature.

The TPS76915DBVTG4 is an excellent choice for use in applications such as portable devices, instrumentation, medical equipment and powering microprocessors in mission-critical applications. Its low quiescent current, fast transient response, low dropout voltage, and high power supply rejection make it an ideal choice for a wide range of applications. Additionally, the device comes packaged in both a small exposed copper-plated copper package and a larger exposed golden ceramic package to provide a flexible design solution for any space-constrained or high-performance system.

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