LD6806CX4/25H,315

Overview

The LD6806CX4/25H,315 is a low-dropout regulator (LDO) from the NXP LD6806 series, featuring a fixed nominal output voltage of 2.5 V and a maximum continuous output current rating of 200 mA. It operates within an input voltage range of 2.3 V to 5.5 V and delivers a typical dropout voltage of 60 mV at full load. The device incorporates a high-ohmic state at the output pin when disabled, ensuring minimal leakage in multi-rail systems. It provides a typical power supply rejection ratio (PSRR) of 55 dB at 1 kHz and maintains a low RMS output noise voltage of 30 µV across the 10 Hz to 100 kHz bandwidth.

Feature Summary

• Ultra-low dropout performance with a typical voltage drop of 60 mV at 200 mA output current.
• High-ohmic (three-state) output configuration when the enable pin is deactivated.
• Integrated thermal protection and overcurrent limiting for enhanced operational safety.
• Low quiescent current consumption in shutdown mode to maximize battery life.

Applications

• Analog and digital interfaces requiring lower than standard supply voltages in mobile appliances
• Mobile phone handsets and cordless telephones
• Personal digital devices and media players

Procurement Notes

Verify that the specific suffix '315' aligns with the manufacturer's official ordering information for the WLCSP4 package variant. Confirm that the required output capacitance meets the minimum stability requirement of 0.7 µF, preferably utilizing X7R dielectric capacitors to ensure correct operation across the specified temperature range. Ensure the design accommodates the 0.4 mm pitch footprint dimensions provided in the datasheet.

Selection Notes

Select this component when a fixed 2.5 V rail is required with minimal board space due to its compact WLCSP4 packaging. It is suitable for designs prioritizing low noise and high power supply rejection in portable electronics. Consider the high-ohmic output feature if the system requires the output node to be electrically isolated during standby modes. Verify that the input voltage remains within the 2.3 V to 5.5 V operating window under all conditions.

Part Context

This part belongs to the LD6806 series of ultra-low-dropout regulators manufactured by NXP Semiconductors. The series is designed for applications demanding component miniaturization and superior operating stability. It utilizes monolithic silicon technology and is available in multiple surface-mounted packages, including WLCSP4, SOT886, and SOT753, catering to diverse space-constrained consumer electronic designs.

Replacement Considerations

LD6806CX4/25P: Identical electrical specifications but features a low-ohmic output stage when disabled instead of a high-ohmic state.

FAQ

What is the output state of the LD6806CX4/25H when the device is disabled?

The LD6806CX4/25H exhibits a high-ohmic (three-state) output state when disabled, unlike the 'P' variants which provide a low-ohmic pull-down.

What is the minimum recommended external load capacitance for stable operation?

The absolute minimum capacitance required for stability is 0.7 µF, though the datasheet recommends using 1.0 µF X7R capacitors for optimal performance across the full temperature range.