TPS70845PWPG4

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TPS70845PWPG4 Application Field and Working Principle

The TPS70845PWPG4 is a low-voltage linear regulator designed for mobile, wearable, and other small-footprint capacitor-less systems powered by batteries. It has a wide input voltage range of 0.1V to 6V, combined with a 0.1V to output voltage adjustable range, an output current of up to 1.5A, and a low-power sleep. mode that enables additional power savings.

TPS70845PWPG4 includes a range of features and guards that serves to increase system robustness in the field. It provides fast load transients of just 3μs, as well as overvoltage, overcurrent, and thermal protection. In addition, the device has low noise and ripple performance, making it suitable for audio applications.

The TPS70845PWPG4 may be used for powering a device of any size, including mobile phones and other battery-powered systems. This is made possible by its wide input voltage range, high output current, and low-power sleep mode. It is suitable for audio applications due to its low noise and ripple, while its fast load transients ensure quick response to sudden load changes.

Working Principle

The TPS70845PWPG4 operates on the basic principles of linear voltage regulation. The device consists of two main blocks: The error amplifier, which senses the output voltage, and the pass element, which supplies current to the load. Control of the output voltage is the result of feedback from the error amplifier and the reference voltage. The error amplifier compares the output voltage to the reference voltage, generating an error signal that is then fed to the pass element. In turn, the pass element adjusts its current delivery until the output voltage is stabilized and matches the reference voltage.

In addition, the TPS70845PWPG4 also includes several protection features. These include overvoltage protection that shuts down the regulator when the output voltage rises past a predefined threshold, overcurrent protection that shuts it down if the load current is too high, and thermal protection that shuts it down if the junction temperature exceeds its maximum rated value. These features help ensure a prolonged device lifetime and reliability in the field.

In conclusion, the TPS70845PWPG4 is a low-voltage linear regulator designed for mobile, wearable, and other small-footprint capacitor-less systems powered by batteries. It has a wide input voltage range and adjustable output voltage, as well as several protective features such as overvoltage, overcurrent, and thermal protection.

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