LE33CD-TR 3.3V Linear Voltage Regulator - STMicroelectronics 8-SOIC IC

The

LE33CD-TR

from STMicroelectronics represents a perfect blend of precision engineering and modern semiconductor technology in the field of voltage regulation. This 3.3V fixed linear regulator delivers exceptional performance in a compact 8-SOIC package, making it an ideal choice for space-constrained applications requiring stable power supply solutions. Designed with advanced protection mechanisms and featuring ultra-low dropout voltage characteristics, this device sets new standards for reliability and efficiency in embedded systems.

At the core of its technical excellence lies the ability to maintain consistent output voltage regulation even under varying load conditions. With a maximum input voltage capacity of 18V and a guaranteed dropout voltage of just 0.5V at 100mA load current, the

LE33CD-TR

offers remarkable flexibility across diverse power supply architectures. Its innovative design incorporates comprehensive protection features including thermal shutdown and overcurrent protection, ensuring robust operation in demanding environments.

One of the standout characteristics of this linear regulator is its exceptional quiescent current performance, maintaining just 1mA typical consumption while delivering up to 100mA output current. This energy-efficient design is further enhanced by its dynamic PSRR (Power Supply Rejection Ratio) specifications, which range from 80dB at 120Hz to 60dB at 10kHz, effectively filtering out power supply noise and maintaining clean voltage output.

Key Specifications	Performance Value
Output Voltage	3.3V Fixed
Max Input Voltage	18V
Output Current	100mA
Dropout Voltage	0.5V @ 100mA
Quiescent Current	1mA
Operating Temperature	-40°C to 125°C

The device's surface mount 8-SOIC package (3.90mm width) combines space-saving advantages with excellent thermal performance. This packaging solution enables efficient heat dissipation while maintaining compatibility with standard PCB assembly processes. The integrated control features allow for easy implementation of power sequencing through the enable pin functionality, making it particularly suitable for complex system designs requiring precise power management.

In modern electronics design, where both performance and reliability are paramount, the LE33CD-TR emerges as a versatile solution. Its wide operating temperature range (-40°C to 125°C) makes it suitable for industrial applications, while its low noise characteristics benefit precision analog circuits and RF systems. The regulator's stability across varying load conditions ensures consistent performance in battery-powered devices where input voltage fluctuates during operation.

When compared to alternative solutions in its class, the LE33CD-TR demonstrates superior performance in several key areas. Its dynamic response to load transients outperforms standard regulators, maintaining voltage stability during sudden current demand changes. The comprehensive protection features eliminate the need for external circuitry, reducing overall system complexity and component count. Additionally, its compatibility with ceramic output capacitors simplifies design while improving transient response characteristics.

For design engineers seeking to optimize their power supply architecture, this regulator offers several implementation advantages. The device's inherent simplicity in application circuit design reduces development time and minimizes potential failure points. Its compatibility with standard PCB manufacturing processes ensures smooth transition from prototype to mass production. The integrated thermal protection eliminates the need for external heat sinking in most applications, further contributing to compact system designs.

In conclusion, the LE33CD-TR stands as a testament to STMicroelectronics' commitment to innovation in power management solutions. Its combination of technical excellence, robust design, and versatile implementation makes it an indispensable component for modern electronic systems. Whether in industrial control systems, portable electronics, or precision instrumentation applications, this linear regulator delivers the reliability and performance needed to meet today's demanding design requirements.

Tags: Voltage Regulator, LE33CD-TR, STMicroelectronics, 3.3V, 8-SOIC