L4901A

The L4901A is a low dropout linear regulator (LDO) manufactured by STMicroelectronics. It is specifically designed to provide a stable voltage supply for microelectronic and electronic circuits. The L4901A is ideally suited for applications such as tablet PCs, PDAs (Personal Digital Assistants), Set-Top-Boxes and TV monitors. It can also be used in applications requiring high-efficiency level shifting or rail splitting.

The L4901A operates as a conventional 3-terminal linear regulator, with a fixed output voltage of 5V. The L4901A operates with a wide input voltage range of 4.5V to 25V, making it suitable for a variety of applications that require low power consumption. The L4901A can provide output currents up to 500mA, with an adjustable current limit of between 200mA and 500mA. The L4901A is protected against over-temp and over-voltage conditions, ensuring safe operation.

The L4901A is designed to provide excellent transient response, making it suitable for a variety of applications that require power regulation during load transients. A power-on reset generator is also included, allowing the L4901A to be used in safety-critical applications. The power-on reset generator is adjustable up to the maximum output current level and can be set to delay for up to 24ms. The L4901A provides a high-accuracy, low-noise output voltage and features low output voltage ripple for high-impedance loads.

The L4901A’s constant-voltage and constant-current limiting features allow it to be used in applications requiring both switching and linear regulation. For example, in constant-voltage mode, the L4901A can be used as an adjustable output voltage regulator. In constant-current mode, it can be used to generate a constant-current signal to a load.

The L4901A can be used in applications that require tight voltage regulation, such as microprocessors, DSPs, ASICs, and analog circuitry. Its low quiescent current makes it ideal for battery-powered devices, such as digital cameras and PDAs. The L4901A is easy to use, with user-friendly application notes and an intuitive graphical user interface to facilitate quick programming.

Overall, the STMicroelectronics L4901A is an excellent choice for applications requiring power management, voltage regulation, and efficient power conversion. Its low dropout operation ensures reliable operation, while its wide input voltage range and high loads make it ideal for a wide range of applications.