LD6816CX4/14P,315

Product Overview

The LD6816CX4/14P,315 from NXP USA Inc. is a positive fixed-output linear voltage regulator IC with one output, set to 1.4 V and rated for 150 mA. The device is supplied in a 4-WLCSP (0.76x0.76) surface-mount package and accepts an input voltage up to 5.5 V. Its dropout voltage is specified as 0.075 V at 150 mA, and it provides an enable control feature. Internal protection functions cover over current, over temperature, and transient voltage conditions. The regulator operates from -40°C to 85°C and maintains a quiescent current of 100 µA, with maximum supply current of 250 µA. Power-supply ripple rejection is 55 dB at 1 kHz.

Key Features

• Fixed positive output voltage of 1.4 V with a rated output current of 150 mA.
• Maximum input voltage of 5.5 V and dropout voltage of 0.075 V at 150 mA.
• Single-regulator architecture with an enable control feature.
• Quiescent current of 100 µA and maximum supply current of 250 µA.
• Power-supply ripple rejection of 55 dB at 1 kHz.
• Protection against over current, over temperature, and transient voltage conditions.
• Operating temperature range from -40°C to 85°C.
• Surface-mount 4-WLCSP (0.76x0.76) package, also identified as 4-XFBGA, WLCSP.

Applications

• Supplying a fixed 1.4 V output to low-current electronic subsystems within systems that provide up to 5.5 V input.
• Using the enable control to switch the regulator output on or off in power-managed circuits.
• Filtering input noise in circuits where power-supply ripple rejection at 1 kHz is relevant.
• Operating in temperature ranges from -40°C to 85°C in compact surface-mount power regulation designs.
• Protecting downstream loads during overcurrent, overtemperature, or transient voltage events in compact regulated power paths.

Design & Procurement Notes

When selecting the LD6816CX4/14P,315, confirm that the available input supply remains below 5.5 V and is high enough to maintain 1.4 V output regulation at the required load, using the 0.075 V dropout value at 150 mA as a worst-case margin reference. The enable control supports output sequencing or selective shutdown in circuit designs. Because the device is a surface-mount 4-WLCSP (0.76x0.76) package, layout and assembly processes should match the small footprint and pad configuration. Thermal and noise considerations should account for the -40°C to 85°C operating range, 55 dB PSRR at 1 kHz, and the overcurrent, overtemperature, and transient voltage protection features.