LD6805K/25P,115

Overview

The LD6805K/25P,115 is a fixed positive Low Dropout (LDO) regulator manufactured by NXP Semiconductors. It provides a nominal output voltage of 2.5 V with an input voltage range from 2.3 V to 5.5 V. The device supports a maximum output current of 150 mA and features a dropout voltage of 250 mV at full load. It incorporates an integrated pull-down switching transistor for auto discharge functionality in shutdown mode. The regulator operates within a temperature range of -40 °C to +85 °C and utilizes a DFN1010C-4 (SOT1194-1) plastic package measuring 1 x 1 mm.

Feature Summary

• Integrated pull-down switching transistor ensures low-ohmic output state during disabled mode for rapid capacitor discharge.
• High power supply rejection ratio of 75 dB at 1 kHz minimizes noise coupling from the input supply line.
• Ultra-low quiescent current consumption in shutdown mode enhances battery life in portable applications.
• Monolithic silicon technology construction provides robust electrostatic discharge protection up to 6 kV HBM.

Applications

• Powering analog and digital interfaces requiring lower than standard supply voltages in mobile appliances
• Supplying power to smart phones, mobile phone handsets, and cordless telephones
• Providing regulated voltage for digital still cameras, mobile internet devices, and personal navigation devices

Procurement Notes

Verify that the ordering suffix

Selection Notes

Select this component when a fixed 2.5 V rail is required with minimal board space constraints. The pull-down feature distinguishes it from the high-ohmic variant, making it suitable where fast output discharge is necessary. Ensure the external load capacitance meets the minimum stability requirement of 0.7 µF with appropriate ESR characteristics.

Part Context

This part belongs to the LD6805 series of low-dropout regulators designed for ultra-small form factors. The series offers various fixed output voltages ranging from 1.2 V to 3.6 V. The 'xxP' designation specifically indicates the inclusion of the auto-discharge function, differentiating it from the 'xxH' high-ohmic output variants within the same family.

Replacement Considerations

LD6805K/25H,115