LD6805K/28P,115

Overview

The LD6805K/28P,115 is a fixed-output Low DropOut regulator from the NXP LD6805 series. It provides a nominal output voltage of 2.8 V with a maximum output current rating of 150 mA. The device operates within an input voltage range of 2.3 V to 5.5 V and features a dropout voltage of 250 mV at full load. It utilizes a DFN1010C-4 (SOT1194-1) plastic package measuring 1 x 1 x 0.55 mm. Unlike high-ohmic variants, this P-type device includes an integrated pull-down switching transistor that ensures a low-ohmic output state during disabled mode.

Feature Summary

• Integrated auto discharge function via pull-down switching transistor for low-ohmic output in disabled mode
• Ultra-high Power Supply Rejection Ratio (PSRR) of 75 dB at 1 kHz
• Low quiescent current consumption in shutdown mode
• Built-in over-current protection and ESD protection up to 6 kV Human Body Model

Applications

• Portable mobile appliances requiring component miniaturization
• Analog and digital interfaces needing lower supply voltages
• Mobile internet devices and personal navigation systems

Procurement Notes

Verify the specific ordering suffix

Selection Notes

Select the LD6805K/28P variant when a fast discharge time for the output capacitor is required upon shutdown. This distinguishes it from the H-series which maintains a high-impedance state. Ensure the application requires a fixed 2.8 V rail and fits within the 2.3 V to 5.5 V input window. Confirm that the 150 mA current capability meets the peak load demands of the target circuit design.

Part Context

This component belongs to the LD6805 series of low-dropout regulators manufactured by NXP Semiconductors. The series is characterized by its small physical footprint and high performance metrics suitable for space-constrained designs. The LD6805 family offers various fixed output voltages ranging from 1.2 V to 3.6 V, packaged in a unified DFN1010C-4 form factor to simplify inventory management across different voltage requirements.

Replacement Considerations

Direct replacements include other LD6805K/xxP part numbers from the same series if a different fixed output voltage is acceptable. Cross-referencing should focus on maintaining the 150 mA current rating, the 2.3 V–5.5 V input range, and the SOT1194-1 package outline to ensure mechanical compatibility.