LD6816CX4/13H,315

Product Overview

The LD6816CX4/13H,315 from NXP USA Inc. is a single-channel linear voltage regulator for surface-mount power management. It provides a fixed positive 1.3 V output at up to 150 mA from input voltages up to 5.5 V, with a maximum dropout voltage of 0.075 V at 150 mA. The device uses a 4-WLCSP (0.76 x 0.76) package and includes an enable control along with over-current, over-temperature, and transient-voltage protection. Its 100 µA quiescent current and 55 dB power-supply rejection at 1 kHz are specified for compact low-power circuits operating from -40°C to 85°C.

Key Features

• Fixed positive 1.3 V linear regulator output delivering up to 150 mA
• Maximum input voltage of 5.5 V with 0.075 V maximum dropout voltage at 150 mA
• Enable control feature for regulator output control
• Over-current, over-temperature, and transient-voltage protection
• 100 µA quiescent current and 55 dB PSRR at 1 kHz
• 4-WLCSP (0.76 x 0.76) surface-mount package
• Operating temperature range of -40°C to 85°C

Applications

• Battery-powered sensor modules requiring a fixed 1.3 V rail for low-current digital or analog subsystems
• Portable devices where the compact WLCSP package and enable control can help manage power in standby states
• Embedded control boards needing over-current, over-temperature, and transient-voltage protection for regulated 1.3 V loads
• Low-power measurement circuits where 55 dB PSRR at 1 kHz supports noise-sensitive supply rails

Design & Procurement Notes

When using the LD6816CX4/13H,315, confirm that the system input voltage remains at or below 5.5 V and that the available headroom exceeds 0.075 V under the required load current to maintain the fixed 1.3 V output. The 4-WLCSP (0.76 x 0.76) package requires surface-mount assembly and layout planning for thermal and current paths at 150 mA. The enable control can be used to power-cycle the regulator output, while over-current, over-temperature, and transient-voltage protection should be considered in fault-handling design. The 100 µA quiescent current and 55 dB PSRR at 1 kHz affect standby power and supply-noise budgeting. Check the -40°C to 85°C operating range against board or enclosure temperatures, and confirm the package footprint and assembly process before design release.