TPS79945YZUT

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The TPS79945YZUT is a Low Dropout (LDO) Linear Voltage Regulator. It provides regulation of up to 6A with a wide input voltage range from 4.5V to 24V and is able to do it with very low quiescent current of 20 μA. An in-built frequency compensated voltage reference provides high ripple rejection, accurate output voltage and current limit protection. Additionally, the TPS79945YZUT includes user-selectable output current limiting and thermal protection.

The TPS79945YZUT is well-suited for applications that demand low quiescent current, low noise and low output voltage ripple at high load currents. It is ideal for powering communication transceivers, precision circuitry, and portable electronics. Its broad range of features make it ideal for use in automotive, industrial, and consumer applications.

The TPS79945YZUT provides excellent line and load regulation and output voltage accuracy. Its ceramic output capacitor feedforward compensation which remains constant over frequency ranges ensures fast transient response, high PSRR and excellent output voltage ripple suppression. This helps improve system performance and power savings as the power supply does not need to be over designed. Additionally, it offers selectable output current limit (up to 6A) and programmable or fixed output voltage options.

The TPS79945YZUT works by using an internal pool of current mirror transistors to draw only the exact amount of current needed to meet the target voltage. As the load current increases, the voltage drop across the resistor increases and causes more current to be pulled from the current mirror. The amplified current is then sent to the output pin, where it is converted to a higher voltage and regulated. This regulation loop works due to the feedback loop included in the device.

The TPS79945YZUT\'s low quiescent current power efficiency compared to other regulators makes it a preferred device for low power applications. Its protection features such as current foldback, thermal shutdown and overvoltage protection help improve system reliability and protect against damage from system overload. Additionally, its fast transient response time allows for quick power-up and power-down times, improving system performance.

Overall, the TPS79945YZUT is a highly efficient low dropout linear voltage regulator ideal for powering sensitive circuits with low noise and low output voltage ripple. Its strong protection features and high power efficiency make it ideal for use in industrial, automotive, and consumer applications.

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