LF25CDT-TR

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The LF25CDT-TR is a Linear Voltage Regulator designed specifically for applications in power management and low-dropout (LDO) voltage regulation. It is part of the LF family of integrated circuit regulators developed and manufactured by STMicroelectronics. The LF25CDT-TR regulator is a high-performance 3-terminal positive voltage regulator, featuring an adjustable output voltage range of 1.25 V to 16 V and a maximum output current of 1.5 A. It is designed to provide constant voltage regulation, with a load current limited to 1.5 A.

The LF25CDT-TR regulator has a wide number of applications ranging from power management for general-purpose systems to more specific tasks such as powering microcontrollers, amplifiers, and motor control circuits. It is well suited to low-noise power applications, providing an excellent noise reduction and ripple rejection performance. Furthermore, its wide operating range makes it suitable for a variety of different application environments and temperatures, allowing it to be used in both industrial and consumer applications.

A key feature of the LF25CDT-TR regulator is its internal current and thermal protection feature. This feature prevents damage caused by excessive input voltage, output current, and temperature. It also allows the device to easily switch between its 1.5 A maximum output current mode and a 500 mA “low-load” mode. The low-load mode improves the device’s overall efficiency and reduces power dissipation.

The voltage regulating principle of the LF25CDT-TR regulator is based on negative feedback (NFB) control. It compares the preset output voltage with the actual device output to determine the output voltage error. This error is then used to adjust the strength of the NFB loop, which in turn adjusts the output and/or input voltage, as needed, to regulate the output voltage. The voltage and current are set using two external resistors, R1 and R2. This type of regulation ensures that the output voltage remains stable over a range of environmental conditions.

The LF25CDT-TR regulator is designed to operate over a wide operating temperature range of -40°C to +125°C. It also features Power Good (PG) indication which can be used to signal the presence of a valid voltage at the output and current limiting protection. It also includes under-voltage lockout (UVLO) protection, which helps to prevent unpredictable operation of the device.

Overall, the LF25CDT-TR provides a high-performance 3-terminal positive voltage regulator solution for a wide range of applications. Its wide operating range and NFB control ensure that the output is constantly regulated, while its integrated protection mechanisms provide additional safety and enable it to operate reliably in a wide variety of conditions. It is an ideal choice for a variety of power management needs.

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