LE33CD-TR

Overview

The LE33CD-TR is a fixed positive low-dropout voltage regulator manufactured by STMicroelectronics, delivering a stable 3.3 V output with a maximum current capacity of 100 mA. It operates within an input voltage range of 3.7 V to 18 V and maintains a typical dropout voltage of 200 mV at full load. The device features ultra-low quiescent current of 50 nA and ensures high precision with a voltage regulation accuracy of 2%. Designed for surface-mount applications, it is housed in an SOIC-8 package and supports an extended operating temperature range from -40 °C to +125 °C.

Feature Summary

• Ultra-low static current consumption of 50 nA minimizes power loss in battery-operated systems.
• Fixed 3.3 V output provides precise voltage regulation with 2% accuracy tolerance.
• Low dropout characteristic allows efficient operation with minimal input-to-output voltage difference.
• Robust thermal performance supports reliable operation across wide industrial temperature ranges.

Applications

• Battery-powered portable electronic devices requiring low standby current
• Industrial control systems needing stable voltage regulation in harsh environments
• Communication equipment utilizing surface-mount assembly processes

Procurement Notes

Verify the specific suffix 'TR' indicates reel packaging when sourcing components. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the SOIC-8 footprint matches your PCB layout requirements. Cross-reference the datasheet version to validate electrical characteristics against your design specifications.

Selection Notes

Select this component for designs prioritizing minimal quiescent current alongside moderate output current capabilities. The SOIC-8 package offers a compact solution for space-constrained applications. Consider the 18 V maximum input rating when designing for higher voltage supply rails. The wide operating temperature range makes it suitable for demanding industrial or automotive-grade environments.

Part Context

This part belongs to the LE series of low-dropout regulators from STMicroelectronics, designed for efficiency and low noise. It serves as a surface-mount alternative to traditional linear regulators, offering improved thermal management and board space savings. The series is engineered for applications requiring stable voltage delivery with minimal power dissipation.

Replacement Considerations

Consult official substitution guides for compatible LDO regulators with similar pinouts and electrical ratings. Verify that any replacement maintains the 100 mA output current and 3.3 V fixed output specification. Ensure thermal and package compatibility before implementing cross-brand alternatives.