LD39020TPU185R

Overview

The LD39020TPU185R is a fixed-output linear voltage regulator from STMicroelectronics, providing a stable 1.85 V output with a maximum current of 200 mA. It 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. The device incorporates very low quiescent current consumption of 20 µA at no load and includes logic-controlled electronic shutdown for ultra-low power states. Internal protections include constant current limiting and thermal shutdown, while the package type is 4-DFN (1x1 mm).

Feature Summary

• Ultra-low dropout voltage capability ensures efficient operation even with minimal input-to-output voltage differentials.
• Logic-controlled enable pin allows precise management of power states, achieving negligible current draw in shutdown mode.
• Integrated soft-start circuitry mitigates inrush current during startup, protecting downstream components.

Applications

• Low-power battery-operated portable electronics
• Smartphones and wearable devices requiring compact power solutions
• Tablets and handheld equipment needing stable voltage regulation

Procurement Notes

Verify the specific suffix 'TPU' against official STMicroelectronics documentation to confirm the exact output voltage tolerance and package variant. Ensure compatibility with ceramic output capacitors as specified in the datasheet. Confirm RoHS compliance status for your region's regulatory requirements before finalizing procurement.

Selection Notes

Select this component when space constraints necessitate a small footprint like the 4-DFN package. It is suitable for applications requiring high PSRR and low noise. Consider the ±0.5% accuracy if the 'A' version is required, otherwise verify standard tolerance specifications. Ensure the input voltage remains within the 1.5 V to 5.5 V operational range.

Part Context

This part belongs to the LD39020 family of low-dropout regulators designed for high accuracy and low power consumption. The series is optimized for mobile and battery-powered applications where efficiency and size are critical. It shares common protection features and package options across various fixed output voltage configurations within the same product line.

Replacement Considerations

Consult official substitution lists for equivalent LDOs with similar 200 mA output and 4-DFN packaging. Verify that any substitute matches the 1.85 V output voltage and input voltage range. Ensure pinout compatibility and thermal performance characteristics align with the original design requirements.