TPS75225QPWPREP

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The TPS75225QPWPREP is a synchronous, step-down DC/DC module with integrated FETs suitable for applications working at 5V and 3.3V levels. It is part of the Texas Instruments’ TPS75225 family of linear voltage regulators and is a PMIC (Power Management IC) type of device. The TPS75225QPWPREP is a flexible, multi-channel power supply solution that is available in both 8 pin and 10 pin packages. The device operates from a single 5V supply or from the dual VMIN and VDDIN supplies. It provides a regulated output voltage from either a fixed (5V) or a variable (3.3V) voltage source.

The TPS75225QPWPREP features a 2.45V to 5.5V input voltage range, allowing for a wide range of applications. It includes two individual, fully protected, single-output voltage regulators, each capable of delivering up to 250mA of continuous output current. The device also includes an output undershoot detection circuit, a thermal shutdown circuit, and the ability to drive low-side MOSFETs with adjustable current limits and overtemperature protection. The output voltage and current supplied by the TPS75225QPWPREP are adjustable, allowing for a wide range of applications.

The TPS75225QPWPREP also includes a Power Good output, which can be used to indicate when the output voltage is within specified limits. The Power Good signal is accessible through an external pin and can be connected to an external indicator or logic controller. The power supply can be shut down with the shutdown input, allowing for a very small sleep mode current draw. The device is suitable for system power supply applications, power bus converter applications, and anywhere a regulated output voltage is required.

The principle of operation of the TPS75225QPWPREP is based on a synchronous buck converter operating from either a single 5V supply or from a dual VMIN/VDDIN supply. This design provides a constant frequency, fixed-output voltage by maintaining a current loop with the use of internal, low-impedance switches, the boost FET and the synchronous FETs. In this type of converter, the boost FET and the synchronous FETs are used to drive the output voltage of the converter. The output voltage is adjustable using an external resistor divider.

The output voltage level is monitored by the feedback loop and compared with the reference voltage. If the voltage level is higher or lower than the reference voltage, the boost FET and the synchronous FETs are turned on or off, respectively, thus maintaining the voltage. The output voltage is further stabilized with the use of the internal soft-start and compensation circuitry, which limits the in-rush current and prevents load transients.

The TPS75225QPWPREP is a cost-effective and easy-to-use voltage regulator for a variety of applications including system power supplies, bus converters, and other applications that require a regulated output voltage. It features a wide input voltage range from 2.45V to 5.5V, and is capable of delivering up to 250mA of continuous output current. The device includes several protection features, such as thermal shutdown and output undershoot detection, as well as a power good output. With the ability to shut down the device with the shutdown input, the TPS75225QPWPREP is the perfect device for applications with a wide input voltage range and high current requirements.

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