STMicroelectronics

LE33CD-TR

LE33CD-TR Description

The LE33CD-TR is a 3.3V fixed-output low-dropout (LDO) linear voltage regulator from STMicroelectronics, designed for surface-mount applications in compact electronic systems. With an input voltage range up to 18V and a 100mA output current, it provides stable power regulation for low-power devices. The regulator features a low dropout voltage of 0.5V at 100mA, ensuring efficient operation even with marginal input voltages. Its quiescent current of 1mA and enable control function enhance power management, making it suitable for battery-operated and energy-sensitive designs. Packaged in 8-pin SOIC (Tape & Reel), it is optimized for automated assembly processes.

LE33CD-TR Features

• High PSRR (80dB @ 120Hz): Excellent noise rejection for sensitive analog/digital circuits.
• Low Dropout (0.5V @ 100mA): Maintains regulation with minimal headroom, ideal for low-voltage inputs.
• Enable Pin: Allows dynamic power control to reduce standby consumption.
• Protection Features: Includes over-current and over-temperature safeguards for reliability.
• Low Quiescent Current (1mA): Minimizes power waste in idle modes.
• Wide Input Range (Up to 18V): Compatible with diverse power sources (e.g., 12V rails, unregulated adapters).
• RoHS3 & REACH Compliant: Meets environmental and safety standards.

LE33CD-TR Applications

• Portable Electronics: Power management for IoT sensors, wearables, and handheld devices.
• Industrial Controls: Stable voltage supply for PLCs, sensors, and low-power MCUs.
• Automotive Systems: Auxiliary power for infotainment, telematics, and aftermarket modules.
• Consumer Electronics: Voltage regulation in set-top boxes, smart home devices, and peripherals.
• Medical Devices: Reliable power for portable diagnostic equipment due to low noise and high PSRR.

Conclusion of LE33CD-TR

The LE33CD-TR stands out for its low dropout, high PSRR, and enable-controlled operation, making it a versatile choice for space-constrained, power-sensitive applications. Its robust protection features and compliance with environmental standards ensure reliability in demanding environments. Compared to similar LDOs, it offers superior noise suppression and efficiency, particularly in battery-powered or noise-sensitive systems. Engineers can leverage its 8SO package for streamlined production while benefiting from STMicroelectronics' proven quality in voltage regulation.