LD6815TD/29H,125

Product Overview

The LD6815TD/29H,125 from NXP USA Inc. is a positive fixed-output linear voltage regulator for surface-mount power regulation. The device provides a single 2.9 V output at up to 150 mA, with a maximum input voltage of 5.5 V and a typical dropout of 0.25 V at 150 mA. It uses a 5-TSOP package, SC-74A/SOT-753, and operates from -40°C to 85°C. The regulator includes an enable control feature and protection against over-current and transient-voltage conditions.

Key Features

• Single positive fixed output delivering 2.9 V at up to 150 mA.
• Maximum input voltage of 5.5 V supports regulation from low-voltage supplies.
• Typical dropout of 0.25 V at 150 mA helps preserve headroom in battery-powered circuits.
• Quiescent current of 35 uA and maximum supply current of 150 uA.
• PSRR of 75 dB at 1 kHz.
• Enable control feature for output activation or shutdown.
• Protection features include over-current and transient-voltage protection.
• Surface-mount 5-TSOP package, SC-74A/SOT-753, operating range -40°C to 85°C.

Applications

• Regulated 2.9 V rail for low-voltage digital logic or microcontroller subsystems.
• Bias supply for sensors, signal chains, or analog front-end blocks requiring a fixed voltage.
• Power management in compact battery-operated devices where low quiescent current and small footprint are relevant.
• Local regulation from an input rail not exceeding 5.5 V in portable or embedded assemblies.

Design & Procurement Notes

When selecting this regulator, confirm that the input supply remains within 5.5 V maximum and above the 2.9 V output plus dropout under full 150 mA load. The enable control feature can be used for system sequencing or power-state control. The fixed 2.9 V output, 150 mA current capability, 35 uA quiescent current, and 75 dB PSRR at 1 kHz define its role in low-current fixed-rail designs. Designers should also account for the 5-TSOP surface-mount footprint and the -40°C to 85°C operating range during board layout and environmental planning.