LD6816CX4/29P,315

Product Overview

The LD6816CX4/29P,315 from NXP USA Inc. is a positive, fixed-output linear voltage regulator in a 4-WLCSP surface-mount package. It provides a single 2.9 V output at up to 150 mA, with a maximum input voltage of 5.5 V. The device includes an enable control and protection against over-current, over-temperature, and transient voltage events. Its specified dropout voltage is 0.075 V at 150 mA, and it operates over a -40°C to 85°C temperature range.

Key Features

• Fixed positive 2.9 V output with 150 mA maximum output current
• Maximum input voltage of 5.5 V
• Dropout voltage of 0.075 V at 150 mA
• Quiescent current of 100 µA; maximum supply current of 250 µA
• PSRR of 55 dB at 1 kHz
• Enable control and over-current, over-temperature, and transient voltage protection
• Single-output linear regulator in 4-WLCSP (0.76x0.76) package

Applications

• Regulated 2.9 V supply for low-current sensor electronics
• Post-regulation from a 5.5 V maximum input rail
• Enable-controlled power rail in battery-powered handheld devices
• Compact 2.9 V regulator for embedded control boards

Design & Procurement Notes

For board design, confirm that the input supply remains at or below 5.5 V and that input headroom is considered against the 2.9 V fixed output and the 0.075 V dropout specification at 150 mA. The 100 µA quiescent current and 250 µA maximum supply current should be included in battery current budgets. The enable control can be used to gate the regulator output, while the over-current, over-temperature, and transient voltage protections define the device's fault-response behavior. The 4-WLCSP (0.76x0.76) package requires surface-mount assembly and pad layout matched to the package dimensions. Operation should be kept within -40°C to 85°C.