LD39020ADTPU08R

Overview

The LD39020ADTPU08R is a fixed-output linear low-dropout regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 0.8 V with a maximum continuous output current of 200 mA. The device operates from 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 40 µA, while shutdown consumption is less than 0.1 µA. Power supply rejection ratio (PSRR) reaches 80 dB at 1 kHz and 55 dB at 100 kHz. It includes internal soft-start, overcurrent protection, and thermal shutdown. The component is housed in a 4-DFN (1x1 mm) surface-mount package and supports operation across a junction temperature range of -40°C to +125°C.

Feature Summary

• Ultra-low dropout voltage capability ensures efficient power delivery under varying load conditions.
• Logic-controlled enable pin allows for precise electronic shutdown with minimal standby current consumption.
• Integrated soft-start circuit limits inrush current during power-up sequences.
• Built-in thermal and current protection mechanisms safeguard the device against fault conditions.

Applications

• Low-power battery-operated portable electronics
• Smartphones and wearable devices requiring compact power solutions
• Tablets and handheld equipment utilizing ceramic capacitor stabilization

Procurement Notes

Verify the specific suffix 'A' indicates high accuracy tolerance compared to standard versions. Confirm the 'DTPU' designation corresponds to the 4-DFN 1x1 package with exposed pad. Ensure the '08R' suffix matches the required 0.8 V fixed output voltage. Check RoHS compliance status and moisture sensitivity level requirements for your assembly process. Validate that the ordering quantity aligns with the manufacturer's standard reel specifications.

Selection Notes

Select this component when a stable 0.8 V rail is required for sensitive analog or digital circuits. The high accuracy version offers tighter output voltage tolerance suitable for precision applications. Consider the small footprint if board space is constrained. Ensure the input voltage remains within the 1.5 V to 5.5 V operational window. Verify that the load current does not exceed the 200 mA guaranteed limit for reliable performance.

Part Context

This part belongs to the LD39020 family of ultra-low quiescent current linear regulators designed for space-saving applications. The family includes various fixed output voltages ranging from 0.8 V to 5.0 V. The 'A' variant denotes enhanced accuracy specifications compared to the standard LD39020 series. All variants share similar protection features and package options, including DFN4 and SOT23-5L.

Replacement Considerations

LD39020DTPU08R serves as a standard accuracy alternative with wider output tolerance. Other LD39020 variants with different output voltages may be used if the voltage requirement changes. Cross-reference package compatibility when substituting with other 4-DFN regulators.