STLQ015M30R

Product Overview

The STMicroelectronics STLQ015M30R is a fixed-output linear voltage regulator IC designed to provide a regulated 3 V positive supply from input voltages up to 5.5 V. It delivers up to 150 mA to a single output and is offered in a surface-mount SOT-23-5 package. The device includes an enable control feature and protection against over-current and over-temperature conditions. Its low quiescent current of 1.7 µA supports power-sensitive operation, while the specified dropout voltage is 0.3 V at 150 mA. The regulator is suitable for compact board layouts that require a simple fixed-voltage supply for low-current digital or analog circuitry.

Key Features

• Fixed 3 V positive output with a maximum input voltage of 5.5 V.
• Single regulator channel capable of supplying 150 mA.
• Low quiescent current of 1.7 µA and maximum supply current of 2.4 µA.
• Maximum dropout voltage of 0.3 V at 150 mA.
• Enable control feature for output state management.
• Over-current and over-temperature protection features.
• Surface-mount SOT-23-5 package, also identified as SC-74A, SOT-753.
• Operating temperature range of -40°C to 125°C junction temperature.
• PSRR of 40 dB at 1 kHz and 15 dB at 100 kHz.

Applications

• Battery-powered portable devices requiring a stable 3 V rail for microcontrollers or sensors.
• Low-power consumer electronics boards where enable control can reduce standby current.
• Compact embedded modules using a small fixed-output regulator for auxiliary logic.
• Sensor and control circuits needing a regulated 3 V supply within a limited board area.
• Power management circuits that benefit from over-current and over-temperature protection in space-constrained designs.

Design & Procurement Notes

For design use, verify that the available input voltage remains above the required 3 V output plus the 0.3 V dropout margin at the intended load current, and confirm that the maximum 5.5 V input rating is not exceeded. The enable feature can be used to control the output when the regulator is not needed, but the 1.7 µA quiescent current should be included in total system power budget calculations. The SOT-23-5 package supports compact surface-mount layouts, while thermal performance should be assessed against the -40°C to 125°C junction temperature limit. External capacitor selection should follow the manufacturer's design guidance. When selecting the part for a board, confirm that the fixed 3 V output and 150 mA capability match the load profile, and evaluate the enable control logic against system power sequencing requirements.