LD39020TPU33R

Overview

The LD39020TPU33R is a fixed-output low dropout linear regulator IC manufactured by STMicroelectronics. It provides a stable 3.3 V output with a maximum current capability of 200 mA. The device operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 200 mV at full load. Quiescent current is specified at 20 µA under no-load conditions, with shutdown consumption below 0.1 µA when enabled. It utilizes a 4-DFN (1x1 mm) surface-mount package and supports operation across a temperature range of -40 °C to +125 °C.

Feature Summary

• Ultra-low quiescent current consumption for extended battery life in portable devices
• Logic-controlled electronic shutdown function enabling deep sleep modes
• Internal soft-start circuit limits inrush current during power-up sequences
• Integrated thermal and constant current protection safeguards against overload

Applications

• Low-power battery-operated consumer electronics
• Smartphones and tablets requiring efficient power management
• Wearable devices with strict space and power constraints
• Portable medical equipment needing stable regulated supply

Procurement Notes

Verify the specific suffix 'TPU33R' against the official STMicroelectronics datasheet to confirm the fixed 3.3 V output voltage and DFN4-1x1 package configuration. Ensure compatibility with ceramic output capacitors as required by the device stability specifications. Confirm RoHS compliance status through the manufacturer's documentation before finalizing procurement orders.

Selection Notes

Select this component for applications requiring minimal footprint and ultra-low standby current. The LD39020 series is suitable where high power supply rejection ratio is needed alongside small physical dimensions. Consider the 200 mA output limit when designing for peak load currents. Verify that the input voltage remains within the 1.5 V to 5.5 V operational window for reliable regulation.

Part Context

This part belongs to the LD39020 family of high-accuracy voltage regulators designed for space-constrained portable systems. The family emphasizes low noise and low dropout performance. The TPU33R designation indicates a specific output voltage variant within the broader product line, sharing core architectural features with other members like the LD39020DTPU33R.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.