LD6805K/20P,115

Overview

The LD6805K/20P,115 is a fixed positive Low Dropout (LDO) regulator providing a nominal output voltage of 2.0 V. It operates within an input voltage range of 2.3 V to 5.5 V and supports a maximum output current of 150 mA. The device features a dropout voltage of 250 mV at full load and includes an integrated pull-down switching transistor for auto discharge functionality in shutdown mode. Packaged in a compact DFN1010C-4 (SOT1194-1) plastic housing measuring 1 x 1 mm with a height of 0.55 mm, it ensures stable operation with low quiescent current and high power supply rejection ratio.

Feature Summary

• Integrated pull-down switching transistor provides a low-ohmic output state during disabled mode for rapid auto discharge.
• High power supply rejection ratio suppresses input noise and ripple signals effectively.
• Ultra-low quiescent current consumption in shutdown mode extends battery life in portable devices.
• Monolithic silicon technology construction ensures robust performance and reliability.

Applications

• Powering analog and digital interfaces requiring lower than standard supply voltages in mobile appliances
• Smart phones, mobile phone handsets, and cordless telephones
• Digital still cameras, mobile internet devices, personal navigation devices, and portable media players

Procurement Notes

Verify the specific ordering suffix matches the required package variant and output tolerance. Confirm that the pull-down feature aligns with system requirements for disabled states. Ensure compatibility with lead-free manufacturing standards and environmental compliance specifications before finalizing procurement orders.

Selection Notes

Select this component when a fixed 2.0 V rail is needed with minimal footprint constraints. The auto discharge function distinguishes it from high-ohmic variants, making it suitable for applications requiring fast output voltage decay upon shutdown. Verify that the external capacitor ESR remains within specified limits to maintain stability.

Part Context

This part belongs to the LD6805 series of ultra-small LDO regulators designed for space-constrained portable electronics. The 'xxP' designation indicates the inclusion of an internal pull-down resistor, differentiating it from the 'xxH' high-ohmic counterparts. It utilizes the DFN1010C-4 package to minimize board area while maintaining thermal efficiency through direct copper connection.

Replacement Considerations

LD6805K/20H,115