TPS51225RUKT

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TPS51225RUKT Application Field and Working Principle

PMIC - Voltage Regulators - Linear + Switching
The TPS51225RUKT is an excellent power management integrated circuit (PMIC) specifically designed to supply low noise, low output voltage, and low power consumption in off-line switching power supplies. It is an integrated device with a steady-state switching frequency of 1 MHz, making it suitable for use in smartphones, tablets, and other mobile devices that require higher efficiencies. The TPS51225RUKT also has a broad range of applications in power supply and power converter designs.

Overview of the TPS51225RUKT

The TPS51225RUKT is a low-dropout (LDO) linear regulator from the Texas Instruments family of integrated circuits. It is specifically designed for use in circuits where the load current is low and the voltage is low (4.4V to 8.8V). The component is also suitable for AC/DC and DC/DC systems, where the load current is high and the output voltage drops UP to 6 volts. The TPS51225RUKT has a maximum output power of 5.6W and a fast transient response.

Features of the TPS51225RUKT

The TPS51225RUKT contains several features that make it suitable for use in a wide range of applications. First, it contains an internal 4-layer current limitation circuit that is Protected Against Over-Current, Short-Circuit, and Overvoltage Conditions. The component also has a low noise output, which is up to 79.2 dB less than its competitors. In addition, the component has low quiescent current which makes it suitable for ultra-low power applications.

The TPS51225RUKT also has multiple safety features. By default, the component is powered with 5V, however, if the voltage increases above 6V, the component will shut off power and enter the undervoltage lockout (UVLO) state. The component has low EMI noise, and the switching frequency of 1MHz allows it to be used in high speed applications. It also has a built-in thermal shutdown protection, which protects against overheating.

Working Principle of the TPS51225RUKT

The TPS51225RUKT is an internally compensated, low voltage, and high current linear regulator. Its working principle is fairly simple and straightforward. The component has an internal regulator block which is used to regulate the power input. The internal regulator block contains the error amplifier, reference voltage, and control circuitry. When the input voltage is greater than the reference voltage, the error amplifier causes the control circuitry to switch on the power MOSFET. This in turn increases the output voltage, which helps maintain the input voltage.

The TPS51225RUKT also has a switching frequency of 1MHz, allowing it to respond quickly to the changes in the output voltage. The internal regulator block also automatically adjusts the output current and reduces the input voltage to maintain a constant voltage output regardless of the load current. This helps maintain the overall efficiency of the system.

Conclusion

In conclusion, the TPS51225RUKT is a low-droop linear regulator designed for use in power supply and power converter designs. It is specifically designed for low current and low voltage applications, making it suitable for use in mobile devices that require higher efficiencies. The component has multiple safety features, such as over-current and short-circuit protection, and its maximum output power is 5.6W. The presence of a 1MHz switching frequency allows for fast transient response and its low quiescent current makes it suitable for low power applications. The device is also Protected Against Overvoltage Conditions and has built-in thermal shutdown protection.

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