STMicroelectronics

LD39030SJ18R

LD39030SJ18R Description

The LD39030SJ18R is a linear regulator IC designed for power management applications, manufactured by STMicroelectronics. This device offers a fixed output voltage of 1.8V and is capable of delivering a maximum output current of 300mA. It is designed to operate with an input voltage range up to 5.5V, making it suitable for a variety of low-voltage applications. The regulator features a low dropout voltage of 0.3V at 300mA, which enhances its efficiency and performance in low-voltage environments.

The LD39030SJ18R is housed in a 4-FlipChip package, which is ideal for surface mount applications. It includes an enable control feature, allowing for precise control over the regulator's operation. The device also incorporates protection features such as over-current and over-temperature protection, ensuring reliable operation under various conditions. Additionally, it features a soft start mechanism to prevent inrush currents during startup.

LD39030SJ18R Features

• Fixed Output Voltage: 1.8V, providing a stable power supply for sensitive electronics.
• High Output Current: Capable of delivering up to 300mA, suitable for applications requiring moderate power.
• Low Dropout Voltage: 0.3V @ 300mA, ensuring high efficiency even at low input voltages.
• Low Quiescent Current: 50 µA, minimizing power consumption during standby.
• Low Supply Current: 85 µA max, contributing to overall system efficiency.
• High PSRR: 62dB (1kHz ~ 10kHz), reducing noise and improving signal integrity.
• Enable Control: Allows for precise control over the regulator's operation.
• Protection Features: Over-current, over-temperature, and soft start protection ensure reliable operation.
• Surface Mount Package: 4-FlipChip, suitable for compact and high-density designs.
• Compliance: REACH unaffected and ROHS3 compliant, ensuring environmental safety.

LD39030SJ18R Applications

The LD39030SJ18R is ideal for a range of applications where a stable and efficient power supply is required. Its low dropout voltage and high PSRR make it particularly suitable for battery-powered devices and low-voltage systems. Specific use cases include:

• Consumer Electronics: Portable devices such as smartphones, tablets, and wearables.
• Industrial Applications: Low-power sensors and controllers.
• Medical Devices: Portable medical equipment requiring stable power supply.
• Telecommunications: Low-voltage modules and components in communication systems.
• Automotive: Ancillary systems in vehicles that require efficient power management.

Conclusion of LD39030SJ18R

The LD39030SJ18R from STMicroelectronics is a versatile linear regulator that offers a balance of performance and efficiency. Its low dropout voltage and high PSRR make it suitable for applications where power efficiency and signal integrity are critical. The inclusion of enable control and comprehensive protection features ensures reliable operation in various environments. Despite being marked as obsolete, the LD39030SJ18R remains a reliable choice for designers looking for a compact, efficient, and stable power management solution.