TPS77501PWPG4

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TPS77501PWPG4 is a linear voltage regulator from Texas Instruments suitable for many digital applications. With its low quiescent current and low dropout voltage, it is a great choice for low-power applications. It is a three-terminal device with a pin or pad programmable output voltage, either through a voltage divider or an external reference voltage. The regulator has overvoltage protection, over-temperature protection, and short-circuit protection, making it a safe choice for many applications. This article will discuss the application field and working principle of TPS77501PWPG4 linear voltage regulator.

TPS77501PWPG4 is suitable for many digital applications, such as small office systems, laptops, and personal media players. Its low quiescent current ensures an efficient load operation, while its small footprint saves space in the applications. It can be used to provide regulated power for FPGAs, DSPs, and other digital ICs requiring a wide input voltage range. It is especially suitable for low-power operations such as those in battery-powered portable devices. Its low dropout voltage makes it more energy efficient by reducing the power dissipation, resulting in a longer battery life.

The regulator has three terminals: the output, the ground, and the feedback. The output voltage is determined by the voltage on the feedback pin and is either programmed by an external voltage divider or a reference voltage. The reference voltage can be an external reference such as a band-gap reference or an internal reference built into the device. TPS77501PWPG4 has a programmable output range of 1.5V to 7.5V, adjustable in 0.5 V increments. It can provide up to ± 2% output voltage accuracy over the specified temperature range. The power supply rejection ratio is 50 dB and the line regulation is 20 mV over a line voltage variation of 100 mV.

TPS77501PWPG4 has overvoltage protection, over-temperature protection and short-circuit protection, as well as protection from reverse current. Overvoltage protection automatically shuts down the device in the event of an output voltage higher than the preset threshold. The over-temperature protection feature prevents damage to the device by disabling the internal circuitry when the temperature exceeds a certain threshold. Short-circuit protection automatically turns off the output in the event of an output short circuit. The reverse current protection feature prevents reverse currents from flowing into the device.

The working principle of TPS77501PWPG4 is quite simple. The device is made up of two main parts: the control circuit and the power MOSFET switch. The control circuit consists of comparators, voltage references, and logic circuits. The power MOSFET switch is the main component that controls the output voltage. The control circuit senses the output voltage and compares it to the reference voltage. If the output voltage is higher than the reference voltage, the control circuit turns off the power MOSFET switch, reducing the output voltage. When the output voltage is lower than the reference voltage, the control circuit turns on the power MOSFET switch, increasing the output voltage.

In summary, TPS77501PWPG4 is a linear voltage regulator from Texas Instruments suitable for many digital applications. Its low quiescent current, small footprint, and low dropout voltage make it a great choice for low-power systems. Its overvoltage protection, over-temperature protection and short-circuit protection, as well as reverse current protection, make it a safe choice for many applications. The working principle of the device is based on the control circuit and power MOSFET switch that senses the output voltage and compares it to the reference voltage to regulate the output voltage.

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