LD6806CX4/18H,315

Overview

The LD6806CX4/18H,315 is a fixed-output Low-DropOut regulator from NXP Semiconductors. It provides a nominal output voltage of 1.8 V with an input voltage range of 2.3 V to 5.5 V. The device supports a continuous output current of 200 mA and features a typical dropout voltage of 60 mV at full load. It utilizes a WLCSP4 package with dimensions of 0.76 mm x 0.76 mm. Key electrical characteristics include a quiescent current of 1.0 µA in shutdown mode, 30 µV RMS output noise, and a Power Supply Rejection Ratio of 55 dB at 1 kHz.

Feature Summary

• Ultra-low dropout performance ensures high efficiency and minimized power consumption during operation.
• Low noise output design maintains signal integrity for sensitive analog and digital interfaces.
• Integrated thermal protection and current limiting safeguard the device under fault conditions.
• High-ohmic (three-state) output configuration isolates the load when the device is disabled.

Applications

• Mobile phone handsets requiring component miniaturization
• Cordless telephones
• Personal digital devices
• Media players

Procurement Notes

Verify the specific suffix '315' against official documentation to confirm reel packaging specifications. Confirm RoHS compliance status as required by your manufacturing standards. Ensure the high-ohmic output variant matches the circuit requirements for disabled states. Validate that the WLCSP4 footprint aligns with the PCB layout guidelines provided in the datasheet.

Selection Notes

Select this component for applications demanding small form factors and low standby power. The 1.8 V fixed output suits systems requiring stable logic or analog supply rails. Consider the 200 mA current capability for moderate load demands. The WLCSP4 package is optimal for space-constrained designs where traditional leaded packages are unsuitable.

Part Context

This part belongs to the LD6806 series of ultra-low-dropout regulators designed for portable electronics. The series offers various output voltages and package options, including SOT886 and SOT753. The CX4 designation indicates the Wafer Level Chip-Scale Package format, which minimizes board area compared to standard surface-mount packages.

Replacement Considerations

Consult the manufacturer's portfolio for alternative LDOs with similar voltage and current ratings if availability is an issue. Verify pin compatibility and package dimensions before substituting. Ensure replacement parts meet the same noise and dropout specifications for critical analog circuits.

FAQ

What is the output state of the LD6806CX4/18H when disabled?

The LD6806x/xxH devices exhibit a high-ohmic (three-state) output when disabled, unlike the P variants which provide a low-ohmic state via a pull-down transistor.

Does the LD6806CX4/18H require an external enable pin connection?

Yes, the device includes an active HIGH enable input (EN). The regulator operates only when the EN pin voltage exceeds the minimum HIGH threshold; otherwise, it enters shutdown mode.