STMicroelectronics LDS3985M33R 3.3V Linear Voltage Regulator IC - 300mA Output, SOT-23-5 Package
- Brand: STMicroelectronics
- Product Code: LDS3985M33R
- Availability: In Stock
$0.17
- Ex Tax: $0.17
STMicroelectronics LDS3985M33R 3.3V Linear Voltage Regulator IC
Engineered for precision and reliability, the STMicroelectronics LDS3985M33R linear voltage regulator IC delivers a stable 3.3V output with exceptional efficiency in a compact SOT-23-5 package. This high-performance regulator is designed to meet the demands of modern electronic systems requiring low dropout voltage, minimal quiescent current, and robust protection features. Ideal for battery-powered devices, portable equipment, and embedded systems, this IC combines advanced thermal management with space-saving design to optimize performance in constrained environments.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Input Voltage (Max) | 6V |
| Output Voltage | 3.3V (Fixed) |
| Output Current | 300mA |
| Dropout Voltage | 0.25V @ 300mA |
| Quiescent Current | 150 µA |
| Operating Temperature | -40°C to 125°C |
At the heart of this regulator’s performance lies its ultra-low dropout voltage of 0.25V at full load, enabling efficient operation even with minimal headroom between input and output. The device’s 150 µA quiescent current ensures minimal power consumption in standby modes, making it ideal for energy-sensitive applications like IoT devices and wearable electronics. Its integrated shutdown control allows for remote power management, while comprehensive protection circuits guard against overcurrent, overheating, and reverse polarity damage.
Designed for ease of integration, the SOT-23-5 package offers excellent thermal dissipation in a footprint measuring just 2.9mm x 1.6mm. This compact form factor, combined with high PSRR (55dB at 1kHz to 50dB at 10kHz), makes the LDS3985M33R perfect for noise-sensitive applications such as RF transceivers, sensor modules, and precision analog circuits. The regulator’s fixed output voltage eliminates external resistor dividers, simplifying design and reducing component count in space-critical PCB layouts.
Beyond its electrical specifications, this regulator excels in real-world applications. Its automotive-grade temperature rating (-40°C to 125°C) ensures reliability in harsh environments like industrial control systems and automotive electronics. The tape-and-reel packaging facilitates automated assembly, while STM’s reputation for quality guarantees long-term supply stability for production-scale designs. Whether powering microcontrollers, FPGAs, or MEMS sensors, the LDS3985M33R provides rock-solid voltage regulation with minimal design overhead.
Tags: Linear Voltage Regulator, Power Management IC, SOT-23 Package, 3.3V Output, 300mA Current