LD6836CX4/29H,315

Product Overview

The NXP USA Inc. LD6836CX4/29H,315 is a single-output linear voltage regulator that provides a fixed positive 2.9 V rail at up to 300 mA. It accepts input voltages up to 5.5 V and specifies a maximum dropout voltage of 0.16 V at the full output current. The device is supplied in a surface-mount 4-WLCSP package measuring 0.76 mm x 0.76 mm, making it appropriate for compact power-management layouts. It includes an enable control feature and built-in over-current and over-temperature protection, with a quiescent current of 100 µA and maximum supply current of 250 µA. The specified operating temperature range is -40°C to 85°C, and the regulator provides 55 dB power-supply rejection at 1 kHz.

Key Features

• Fixed positive 2.9 V output with 300 mA maximum output current.
• Input voltage range specified to a maximum of 5.5 V.
• Maximum dropout voltage of 0.16 V at 300 mA.
• Enable control feature for switching the regulator output on or off.
• Over-current and over-temperature protection features.
• Quiescent current of 100 µA and maximum supply current of 250 µA.
• Power-supply rejection ratio of 55 dB at 1 kHz.
• Surface-mount 4-XFBGA/WLCSP package with 0.76 mm x 0.76 mm body dimensions.

Applications

• Regulated 2.9 V rail for portable or embedded electronics powered from supplies up to 5.5 V.
• Enable-controlled power rail in compact modules where output activation can be coordinated by a controller.
• Low-current system boards where 100 µA quiescent current helps limit baseline power draw.
• Space-limited PCB layouts that benefit from a 0.76 mm x 0.76 mm 4-WLCSP footprint.

Design & Procurement Notes

When selecting this regulator, confirm that the available input voltage is compatible with the fixed 2.9 V output and the specified 0.16 V maximum dropout at 300 mA. The enable feature should be incorporated into the power-control logic if the rail needs to be activated or disabled by a host circuit. Because the device provides over-current and over-temperature protection, designers still need to verify normal operating conditions and board thermal behavior within the -40°C to 85°C range. The 4-WLCSP package requires attention to pad layout, soldering, and inspection, especially in compact assemblies. Check that PSRR of 55 dB at 1 kHz is adequate for the noise-sensitive loads connected to the 2.9 V rail.