LD6805K/36H,115

Overview

The LD6805K/36H,115 is a fixed positive Low Dropout (LDO) regulator manufactured by NXP Semiconductors. It provides a nominal output voltage of 3.6 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 high-ohmic state behavior in disabled mode and includes integrated ESD protection up to 6 kV HBM. The component is housed in a compact DFN1010C-4 plastic package measuring 1 x 1 mm.

Feature Summary

• Ultra-high Power Supply Rejection Ratio (PSRR) of 75 dB at 1 kHz for effective noise suppression
• High-ohmic output state when disabled, preventing unintended current flow
• Integrated auto discharge function via pull-down switching transistor in specific variants
• Low quiescent current consumption in shutdown mode

Applications

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

Procurement Notes

Verify the specific suffix 'H' indicates the high-ohmic output state variant rather than the 'P' pull-down variant. Confirm the ordering code matches the required 3.6 V nominal output specification. Ensure compatibility with the DFN1010C-4 package dimensions for PCB footprint design. Check for RoHS compliance status if halogen-free requirements are critical for the target application environment.

Selection Notes

Select this component when a stable 3.6 V rail is needed from a 2.3 V to 5.5 V source. The high PSRR makes it suitable for noise-sensitive RF or analog circuits. Consider the 150 mA current limit against peak load demands. Evaluate the thermal resistance characteristics if operating near ambient temperature limits. Verify that the external capacitor ESR falls within the specified stability range.

Part Context

This part belongs to the LD6805 series of low-dropout regulators designed for miniaturized portable applications. The series offers various fixed output voltages ranging from 1.2 V to 3.6 V. All devices share the same ultra-thin 1x1 mm DFN package and monolithic silicon technology. The family is optimized for applications demanding high battery lifetime and superior operating stability.

Replacement Considerations

LD6805K/36P,115: Same electrical specifications but features a low-ohmic auto-discharge function instead of high-ohmic state.