LD6816CX4/18P,315

Product Overview

The LD6816CX4/18P,315 from NXP USA Inc. is a single-output linear voltage regulator that provides a fixed positive 1.8 V rail with a 150 mA output current rating. It accepts input voltages up to 5.5 V and specifies a maximum dropout of 0.075 V at 150 mA. The device includes an enable control feature and protection against overcurrent, overtemperature, and transient voltage conditions. It uses a 4-WLCSP (0.76 x 0.76) package and is intended for surface-mount assembly.

Key Features

• Fixed positive 1.8 V output with 150 mA output current capability
• Maximum input voltage of 5.5 V
• Maximum dropout voltage of 0.075 V at 150 mA
• Quiescent current of 100 µA and maximum supply current of 250 µA
• Power supply rejection ratio of 55 dB at 1 kHz
• Enable control feature for output activation and system power management
• Protection features include overcurrent, overtemperature, and transient voltage protection
• Operating temperature range from -40°C to 85°C
• 4-XFBGA, WLCSP surface-mount package, 0.76 x 0.76

Applications

• Fixed 1.8 V supply for compact embedded logic subsystems
• Low-current sensor or analog front-end rails where enable control supports power sequencing
• Surface-mount board designs requiring a small WLCSP regulator footprint

Design & Procurement Notes

For design planning, verify that the input voltage does not exceed 5.5 V and that sufficient headroom remains above the 1.8 V output when the load approaches 150 mA, because the maximum dropout is 0.075 V at that current. The 100 µA quiescent current and 250 µA maximum supply current should be included in power budgets for low-power circuits. The enable control feature is available for regulator activation, and the protection features cover overcurrent, overtemperature, and transient voltage conditions. During bill-of-materials review, confirm the exact part number and 4-WLCSP (0.76 x 0.76) package code. Layout should account for the surface-mount footprint and the -40°C to 85°C operating range.