LD6816CX4/18P,315

Overview

The LD6816CX4/18P,315 is a fixed-output Low Dropout Regulator (LDO) from NXP Semiconductors providing a nominal output voltage of 1.8 V with a maximum output current rating of 150 mA. It operates within an input voltage range of 2.3 V to 5.5 V and features a typical dropout voltage of 45 mV at full load. The device incorporates an integrated pull-down switching transistor for auto-discharge functionality when disabled. It utilizes a WLCSP4 package with a 0.4 mm pitch and dimensions of 0.76 mm x 0.76 mm.

Feature Summary

• Integrated pull-down switching transistor provides a low-ohmic output state in shutdown mode for rapid discharge
• Ultra-low dropout performance ensures high efficiency and minimized power consumption during operation
• Low quiescent current in shutdown mode supports extended battery life in portable applications
• Built-in over-temperature protection and output current limiter safeguard against fault conditions

Applications

• 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 suffix '315' against official manufacturer documentation to confirm reel packaging specifications and tape-and-reel parameters. Ensure compatibility with the required WLCSP4 footprint and soldering profiles. Confirm RoHS compliance status and environmental declarations prior to procurement.

Selection Notes

Select this component when a compact form factor is critical due to its WLCSP4 package size. Choose the 'P' variant specifically if an active pull-down function is required to discharge the output capacitor upon shutdown. Ensure the application input voltage remains within the 2.3 V to 5.5 V range and that the load current does not exceed 150 mA.

Part Context

This part belongs to the LD6816 series of ultra-low dropout regulators designed for miniaturization in portable electronics. The series offers various fixed output voltages between 1.2 V and 3.6 V. The CX4 designation indicates the WLCSP4 package type, while the suffix P distinguishes it from the H variant by including the auto-discharge feature.

Replacement Considerations

LD6816CX4/18H: Provides the same electrical characteristics but lacks the pull-down auto-discharge transistor, resulting in a high-ohmic output state when disabled.