STLQ015M21R
IC REG LINEAR 2.1V 150MA SOT23-5
Quick Answer: The STLQ015M21R from STMicroelectronics is a positive fixed-output linear voltage regulator intended for single-rail regulation in compact surface-mount systems.
- Manufacturer
- STMicroelectronics
- Product Category
- Voltage Regulators & Voltage Controllers
- Package
- SC-74A, SOT-753
- Stock
- 14,506 pcs
- Availability
- Current quantity subject to confirmation.
Product Attributes
| Manufacturer | STMicroelectronics |
|---|---|
| Product Category | Voltage Regulators & Voltage Controllers |
| Control Features | Enable |
| Current - Output | 150mA |
| Current - Quiescent (Iq) | 1.7 µA |
| Current - Supply (Max) | 2.4 µA |
| Min Qty | 1 |
| Mounting Type | Surface Mount |
| Number of Regulators | 1 |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| Product status | Active |
| Protection Features | Over Current, Over Temperature |
| PSRR | 40dB ~ 15dB (1kHz ~ 100kHz) |
| Supplier Device Package | SOT-23-5 |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | 2.1V |
| Voltage Dropout (Max) | 0.3V @ 150mA |
| Datasheet | View Datasheet PDF |
Procurement Snapshot
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Detailed Description for STLQ015M21R
Product Overview
The STLQ015M21R from STMicroelectronics is a positive fixed-output linear voltage regulator intended for single-rail regulation in compact surface-mount systems. It provides a fixed 2.1 V output at up to 150 mA from an input voltage up to 5.5 V, with a maximum dropout of 0.3 V at the rated output current. The device includes an enable control feature and protection against over-current and over-temperature conditions. Its 1.7 µA quiescent current supports power-conscious designs, while the SOT-23-5 package allows dense PCB placement. The operating junction temperature range is specified from -40°C to 125°C.
Key Features
- Fixed 2.1 V positive output with 150 mA maximum output current
- Maximum input voltage of 5.5 V
- Maximum dropout voltage of 0.3 V at 150 mA
- Quiescent current of 1.7 µA and maximum supply current of 2.4 µA
- PSRR specified as 40 dB to 15 dB over 1 kHz to 100 kHz
- Enable control feature
- Over-current and over-temperature protection
- SOT-23-5 surface-mount package, also identified as SC-74A / SOT-753
- Operating junction temperature range of -40°C to 125°C
Applications
- Battery-powered sensor nodes requiring a fixed 2.1 V rail for low-current analog or digital circuitry
- Portable measurement instruments where a compact linear regulator provides a fixed reference or bias voltage
- Embedded control boards that need an enable-controlled 2.1 V supply for small-signal components
- Low-current power distribution sections in communication or portable electronics assemblies
Design & Procurement Notes
For board-level selection, verify that the available input voltage remains within the 5.5 V maximum and that the load current does not exceed 150 mA. The 0.3 V dropout at full output current should be included in power budgeting and thermal margin, especially near the 125°C junction limit. The enable control feature can be used to activate or deactivate the regulator output, while over-current and over-temperature protection provides defined fault responses. The SOT-23-5 footprint supports compact layouts, but PSRR is specified as 40 dB to 15 dB over 1 kHz to 100 kHz, so input filtering may be considered where supply noise is significant.
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