STMicroelectronics LD39150PU-R Adjustable Linear Voltage Regulator

Advanced Power Management with STMicroelectronics LD39150PU-R

The LD39150PU-R from STMicroelectronics represents a breakthrough in linear voltage regulation technology, combining exceptional performance with robust protection features for modern electronic designs. This adjustable positive linear regulator delivers up to 1.5A output current while maintaining ultra-low dropout voltage (0.4V max @ 1.5A), making it ideal for battery-powered applications where efficiency and reliability are paramount.

Key Technical Advantages

Engineered with STMicroelectronics' advanced semiconductor technology, this device operates across a 1.22V to 5V output range while accepting input voltages up to 6V. Its 2.5mA quiescent current consumption ensures minimal power waste during standby modes, while the integrated over-temperature and over-current protection circuits safeguard against operational faults. The 65dB PSRR (power supply rejection ratio) at 120Hz-1kHz frequencies maintains clean output voltage even in noisy environments.

Design Optimization Features

The compact 6-DFN (3x3) package with exposed pad enables efficient thermal dissipation while minimizing PCB footprint. This surface-mount device supports adjustable output configurations through external resistor dividers, offering design flexibility for various voltage requirements. The regulator's stable operation across wide load and line conditions eliminates the need for complex compensation networks, simplifying circuit design.

Industrial Applications

Engineers across multiple industries benefit from the LD39150PU-R's performance characteristics:

• Portable medical devices requiring stable power delivery
• Industrial sensors operating in harsh environments
• Telecom infrastructure with strict noise requirements
• Automotive systems needing over-temperature protection

Its compliance with RoHS standards and automotive temperature ratings makes it suitable for both consumer and industrial applications. The device's tape & reel packaging facilitates automated assembly processes while maintaining component integrity during manufacturing.

Performance Comparison

Compared to conventional linear regulators, the LD39150PU-R demonstrates significant improvements:

Design Considerations

When implementing this regulator, designers should consider:

• Proper thermal vias for exposed pad soldering
• Input/output capacitor selection for stability
• Resistor divider accuracy for voltage adjustment
• Ambient temperature effects on power dissipation

STMicroelectronics provides comprehensive design resources including application notes, reference designs, and simulation models to facilitate rapid prototyping and deployment.

Tags: Power Management, Voltage Regulation, Industrial Electronics, Automotive Components, Surface Mount Devices