LD6815TD/21P,125

Product Overview

The LD6815TD/21P,125 from NXP USA Inc. is a fixed-output linear voltage regulator for positive supply rails. It provides one 2.1 V output at up to 150 mA and accepts input voltages up to 5.5 V. The device is supplied in a 5-TSOP surface-mount package, also identified as SC-74A/SOT-753, and is specified for operation from -40°C to 85°C. Its listed control and protection features include Enable, over-current protection, and transient-voltage protection.

Key Features

• Fixed positive 2.1 V output with a 150 mA output current rating.
• Maximum input voltage of 5.5 V and dropout specified as 0.25 V @ 150 mA (Typ).
• Quiescent current of 35 µA and maximum supply current of 150 µA.
• Power-supply rejection ratio of 75 dB at 1 kHz.
• Enable control feature with over-current and transient-voltage protection.
• Surface-mount 5-TSOP package (SC-74A/SOT-753) rated for -40°C to 85°C.

Applications

• Low-current fixed-rail regulation for embedded logic or sensor subsystems that require a 2.1 V supply.
• Local linear regulation in battery-powered or portable equipment where a 150 mA load can be supplied from an input up to 5.5 V.
• Enable-controlled 2.1 V supply rails in circuits that use a control signal to activate the regulator.

Design & Procurement Notes

Designers selecting this regulator should confirm that the required output is fixed at 2.1 V, that the load current remains at or below 150 mA, and that the available input voltage does not exceed 5.5 V. The listed dropout value of 0.25 V @ 150 mA (Typ) should be considered when calculating headroom. The 35 µA quiescent current and 150 µA maximum supply current may be relevant for low-power budget analysis, while the -40°C to 85°C range and SC-74A/SOT-753 5-TSOP package affect environmental and PCB layout choices.