LM3480IM3X-12.pdf
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The LM3480IM3X-12 is part of TI's LM3480 family of quasi-low-dropout regulators. It provides a fixed 12-V output with ±5% regulation accuracy and supports input voltages up to 30 V, making it suitable for systems that derive supply rails from higher DC voltages or unregulated adapters.
At a full 100-mA load, the regulator ensures a typical dropout voltage of approximately 1.2 V, enabling efficient regulation from moderately low supply rails. Its −40 °C to +125 °C junction temperature capability supports industrial environments, automotive accessory modules, field instrumentation and power conditioning circuits.
The LM3480IM3X-12 is packaged in a space-saving SOT-23 (3-pin) format and is supplied in TI's tape-and-reel "IM3X" variant for automated high-volume SMT assembly. Combined with low quiescent current and a simple external component requirement, the device is an excellent choice where clean, compact linear regulation is required.
Supports inputs up to 30 V, enabling reliable operation from unregulated supplies or higher-voltage DC rails typically found in industrial and communication equipment.
The tiny 3-lead SOT-23 package minimizes board space and is ideal for handheld, wearable, or dense PCB layouts where space efficiency is critical.
Provides a clean, regulated 12-V rail with ±5% tolerance, suitable for powering analog sensors, bias networks, interface circuits and post-converter stages.
Rated for −40 °C to +125 °C operation, ensuring dependable performance in harsh or thermally constrained environments.
The quasi-low-dropout architecture enables regulation even when the input rail falls only slightly above the regulated output voltage.
Capable of driving moderate-power analog circuits, reference modules, logic rails or small communication interfaces.
With a 30-V max rating, the device handles noisy or unstable upstream supplies and is suitable for automotive, telecom and field electronics.
| Parameter | Value / Description |
|---|---|
| Output Voltage | Fixed 12 V ±5% |
| Maximum Input Voltage | 30 V |
| Output Current | 100 mA guaranteed |
| Dropout Voltage | ~1.2 V at full load |
| Package | SOT-23-3 (IM3X reel) |
| Junction Temperature Range | −40 °C to +125 °C |
| Typical Applications | Bias supplies, DC/DC post-regulation, 5-V to 12-V converters, industrial analog loads |
Potential alternatives with similar functionality include:
When selecting an alternative, engineers should verify dropout voltage, package size, thermal characteristics and maximum input voltage for compatibility.
Texas Instruments (TI) is a global leader in power management and analog semiconductors, offering high-reliability components used in industrial, automotive, consumer and communication systems.
The LM3480 series is widely deployed due to TI's strong reputation for long-term availability, robust quality control, and detailed application documentation that supports engineers from prototype to mass-production.
Used after switching DC/DC converters to provide a clean, stable analog voltage for noise-sensitive circuits.
Provides fixed bias rails for amplifiers, sensors, oscillators and other mixed-signal components requiring precise low-noise voltage.
Suitable for instrumentation, control modules and field electronics that demand reliable regulation under wide environmental conditions.
Its SOT-23 footprint makes it ideal for handheld meters, portable tools and small embedded designs with tight PCB constraints.
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