LE33CD

Overview

The LE33CD-TR is a low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a fixed positive output voltage of 3.3 V with a maximum continuous output current capability of 100 mA. The device is designed to operate with input voltages typically ranging from 2.5 V up to its maximum rated limit, maintaining regulation within specified dropout conditions. It features internal thermal overload protection and current limiting to safeguard against short circuits and excessive power dissipation. The component is supplied in a compact SOT-23 surface-mount package, facilitating integration into space-constrained portable electronics and battery-powered applications requiring stable low-noise power supply rails.

Feature Summary

• Fixed 3.3 V positive output voltage regulation
• 100 mA maximum output current capability
• Internal thermal shutdown and current limiting protection
• Compact SOT-23 surface-mount packaging

Applications

• Portable consumer electronics
• Battery-powered devices
• Low-noise power supply rails for sensitive analog circuits

Procurement Notes

Verify the complete part number including the trailing suffix, such as -TR, which indicates tape-and-reel packaging. Confirm the specific package variant matches design requirements. Ensure compatibility with input voltage ranges and load currents. Check for any regional compliance certifications required for the target market. Validate that the supplier provides authentic components with traceable documentation.

Selection Notes

Choose this regulator when a stable 3.3 V rail is needed with moderate current demands under 100 mA. Consider the dropout voltage characteristics relative to the minimum input voltage available in the system. Evaluate thermal performance based on expected power dissipation and ambient temperature conditions. Compare alternative LDOs if lower quiescent current or higher output current is required for the specific application constraints.

Part Context

This component belongs to STMicroelectronics' family of low-dropout linear regulators. These devices are engineered for efficiency and stability in low-power applications. The series offers various fixed and adjustable output voltages to support diverse digital and analog circuit requirements across industrial and consumer sectors.

Replacement Considerations

Consult official STMicroelectronics documentation for direct pin-compatible alternatives within the same LDO family. Verify electrical specifications match before substitution. Cross-reference with other manufacturers only if pinouts and parameters are identical.