STMicroelectronics

L9777B  

Linear & Switching Voltage Regulators

L9777B Description

The L9777B is a high-performance linear regulator designed by STMicroelectronics, a leading manufacturer in the electronics industry. This device is part of the Power Management Integrated Circuit (PMIC) category and is specifically tailored for applications requiring a stable and adjustable power supply. The L9777B features an adjustable output voltage, ranging from 4.9V to 5.1V, making it highly versatile for various electronic systems. It supports a maximum input voltage of 31V and can deliver a continuous output current of up to 600mA. The regulator is designed with a single regulator output configuration, ensuring a positive voltage output. The L9777B is housed in a surface-mount package, making it suitable for compact and space-constrained designs. With a dropout voltage of only 1.5V at 50mA, this regulator ensures high efficiency even at low input-to-output voltage differentials. The device also includes essential protection features such as over-current, over-temperature, and short-circuit protection, enhancing its reliability and robustness in demanding applications.

L9777B Features

• Adjustable Output Voltage: The L9777B provides an adjustable output voltage range from 4.9V to 5.1V, offering flexibility in power supply design.
• High Input Voltage Capability: With a maximum input voltage of 31V, the regulator can handle a wide range of input sources, making it suitable for various applications.
• Low Dropout Voltage: The regulator features a low dropout voltage of 1.5V at 50mA, ensuring high efficiency and minimal power loss.
• Protection Features: The L9777B includes over-current, over-temperature, and short-circuit protection, enhancing its reliability and safety in operation.
• Low Quiescent Current: The device has a low quiescent current of 200 µA, which is beneficial for low-power applications and battery-operated devices.
• High PSRR: The regulator boasts a high power supply rejection ratio (PSRR) of 55dB at 100Hz, ensuring excellent noise filtering and stable output voltage.
• Compliance and Packaging: The L9777B is REACH unaffected and RoHS3 compliant, making it environmentally friendly. It is available in a tube package, suitable for surface-mount technology (SMT) applications.

L9777B Applications

The L9777B is ideal for a wide range of applications where a stable and adjustable power supply is required. Some specific use cases include:

• Consumer Electronics: Ideal for powering devices such as smartphones, tablets, and portable gaming consoles, where a stable and efficient power supply is crucial.
• Industrial Equipment: Suitable for industrial control systems and automation equipment, where reliability and robustness are paramount.
• Telecommunications: Can be used in base stations and communication equipment, ensuring stable power delivery under varying load conditions.
• Automotive Electronics: Applicable in automotive applications, such as infotainment systems and electronic control units, where high efficiency and low dropout voltage are essential.
• Medical Devices: Ideal for medical equipment, such as diagnostic devices and portable medical instruments, where precise power regulation is required.

Conclusion of L9777B

The L9777B from STMicroelectronics stands out as a high-performance linear regulator with a range of features that make it suitable for various applications. Its adjustable output voltage, high input voltage capability, low dropout voltage, and comprehensive protection features provide significant advantages over similar models. The device's low quiescent current and high PSRR ensure efficient and stable power delivery, making it an excellent choice for consumer electronics, industrial equipment, telecommunications, automotive electronics, and medical devices. The L9777B's compliance with environmental standards and its surface-mount packaging further enhance its appeal for modern, compact designs. Overall, the L9777B is a reliable and versatile solution for power management needs in the electronics industry.

L9777B Documents

Download datasheets and manufacturer documentation for L9777B

Datasheets :

L9777      

PCN Packaging :

APG/15/9380 07/Sep/2015       Material Barrier Bag 17/Dec/2020      

HTML Datasheet :

L9777