LD39020DTPU13R

Overview

The LD39020DTPU13R is a high-accuracy linear voltage regulator from STMicroelectronics, delivering a fixed 1.3 V output with ±2.0% tolerance at 25 °C. It supports an input voltage range of 1.5 V to 5.5 V and provides up to 200 mA of guaranteed output current. The device features an ultra-low dropout voltage of 200 mV typical at full load and maintains very low quiescent current consumption of 20 µA at no load. It operates within a temperature range of -40 °C to 125 °C and includes internal soft-start, current limit, and thermal protection circuits.

Feature Summary

• Ultra-low dropout performance ensures efficient power delivery under varying load conditions.
• Logic-controlled electronic shutdown enables deep sleep modes with minimal standby current.
• Integrated soft-start circuit limits inrush current during initialization without external components.
• Compatible with small ceramic output capacitors for compact board design.

Applications

• Mobile phones
• Tablets
• Digital still cameras (DSC)
• Portable media players

Procurement Notes

Verify the specific ordering suffix 'DTPU13R' confirms the DFN4 1x1 package, 1.3 V nominal output, auto-discharge feature, and standard ±2.0% tolerance. Ensure compatibility with required PCB footprint dimensions for the DFN4 1x1 package. Confirm that the application environment stays within the specified -40 °C to 125 °C operating junction temperature range for reliable operation.

Selection Notes

Select this component when a stable 1.3 V rail is required from battery sources ranging between 1.5 V and 5.5 V. The DFN4 1x1 package offers significant space savings compared to larger packages. Consider the auto-discharge feature if rapid output voltage decay is necessary upon shutdown. Ensure the load current does not exceed 200 mA and that the input voltage remains above the minimum threshold to maintain regulation.

Part Context

This part belongs to the LD39020 family of low-quiescent-current linear regulators designed for portable electronics. The family offers various fixed output voltages and tolerance grades. The 'DT' suffix indicates the inclusion of an output discharge MOSFET, while 'PU' denotes the DFN4 1x1 package. This specific variant targets applications requiring precise voltage regulation in minimal space.

Replacement Considerations

Direct substitutes include other LD39020 variants with different output voltages or tolerances, such as LD39020DTPU18R for 1.8 V output. Cross-family replacements require verification of pinout compatibility, current capacity, and package dimensions. Ensure any alternative regulator meets the same input voltage range and thermal performance requirements.

FAQ

Does the LD39020DTPU13R support ceramic output capacitors?

Yes, the device is stabilized with ceramic capacitors. A minimum output capacitance of 0.47 µF is recommended to ensure stability across all operating conditions.

What is the function of the EN pin on this regulator?

The EN pin is a logic-controlled enable input. Driving it high activates the regulator, while driving it low puts the device into shutdown mode, reducing current consumption significantly.