STMicroelectronics LD2985BM33R Linear Regulator 3.3V 150mA

Precision Voltage Regulation for Modern Electronics

In today's rapidly evolving electronic landscape, engineers require components that combine reliability, efficiency, and compact design. The STMicroelectronics LD2985BM33R emerges as a premier solution for applications demanding stable 3.3V power supply with exceptional thermal performance and space-saving advantages. This low-dropout linear regulator (LDO) exemplifies STMicroelectronics' commitment to innovation while addressing the critical needs of portable devices, industrial controls, and automotive systems.

Key Technical Advantages

Engineered with advanced CMOS technology, the LD2985BM33R delivers 150mA output current while maintaining a minimal dropout voltage of just 0.575V. This exceptional efficiency translates to reduced power consumption and heat generation, crucial for battery-powered applications. The device's 16V maximum input voltage capability provides design flexibility across multiple power architectures, while its 45dB PSRR (Power Supply Rejection Ratio) at 1kHz ensures clean output voltage even in electrically noisy environments.

Comprehensive Protection System

Reliability remains paramount in mission-critical applications. The LD2985BM33R integrates dual protection mechanisms: thermal shutdown prevents damage from overheating, while output current limiting safeguards against electrical faults. These features make it particularly suitable for automotive environments where operating temperatures range from -40°C to 125°C. The device's enable control function further enhances system design flexibility by allowing precise power sequencing.

Space-Efficient Packaging

Housed in a SOT-23-5 surface-mount package (SC-74A), this regulator occupies minimal PCB real estate while maintaining excellent thermal dissipation characteristics. The compact footprint enables designers to create smaller, lighter end-products without compromising performance - a crucial advantage for IoT devices, wearable electronics, and space-constrained industrial sensors.

Design Flexibility and Compatibility

The LD2985BM33R's 16V input capability allows direct connection to various power sources including automotive batteries and industrial power rails. Its low quiescent current (150µA) and shutdown mode (4mA maximum supply current) optimize energy efficiency across different operational states. When paired with modern microcontrollers and RF modules requiring stable 3.3V supplies, this regulator forms the backbone of efficient power architectures in wireless communication systems and edge computing devices.

Tags: Low Dropout Regulator, Voltage Regulation IC, Surface Mount Power Device, Industrial Electronics Component, Automotive Grade Power Supply