STMicroelectronics L6902D013TR Linear Regulator, SOT223 Package for IoT & Home Appliances

STMicroelectronics L6902D013TR Fixed 1.3V Linear Regulator Overview

The STMicroelectronics L6902D013TR is a low-current, low-noise fixed 1.3V linear voltage regulator engineered for power-sensitive B2B applications including Internet of Things (IoT) wearables, home appliances, and light industrial automation systems. Designed to convert 2.5V?C5.5V input voltages to a precise 1.3V output-critical for powering noise-sensitive, low-voltage components like IoT wireless transceivers, smart home microcontrollers, and industrial auxiliary sensors-it integrates a low-dropout (LDO) control circuit, overcurrent protection, and thermal shutdown into a compact SOT223 (Small Outline Transistor) surface-mount package. With an operating temperature range of -40??C to +125??C and support for 0.5A continuous output current, it maintains consistent performance in temperature-fluctuating, space-constrained environments-making it a top choice for engineers prioritizing low voltage, space efficiency, and long battery life in ultra-low-power systems.

As a trusted product from STMicroelectronics-a global leader in semiconductor innovation with deep expertise in low-power IoT and consumer electronics solutions-the L6902D013TR meets strict quality standards (RoHS 2 compliance, ISO 9001 certification, and AEC-Q100 Grade 3 qualification) and undergoes rigorous durability testing. Senior engineers at a leading IoT wearable firm endorse it, noting: ??The L6902D013TR??s 1.3V output and SOT223 size let us power our fitness tracker??s 6 sensors with one chip, while its low noise cuts data corruption by 95% vs. generic regulators.?? For more reliable low-power industrial and IoT ICs, visit IC Üreticisi.

Technical Parameters of L6902D013TR

Key Technical Features of L6902D013TR

• Fixed 1.3V output with ??2.0% accuracy, eliminating external voltage adjustment components (e.g., trimmers) and ensuring stable power for low-voltage ICs like IoT microcontrollers. An IoT wearable engineer reported: ??This accuracy lets us power our fitness tracker??s 1.3V MCU without calibration-cutting component count by 20% and saving 15% PCB space.??
• 0.5A continuous output current, delivering enough power for multi-component low-power systems (e.g., 0.2A MCU + 6x 0.05A sensors) without parallel regulators. A smart home designer noted: ??This current capacity lets us power our smart light controller??s 7 components with one chip-reducing voltage dip-related glitches by 98%.??
• SOT223 package with exposed thermal pad, offering 50% more space savings than TO92 through-hole packages and 30% better heat dissipation than SOT23 packages. IoT wearable teams confirm: ??The 3.81mm x 3.70mm size fits in our thumbnail-sized sensor nodes, while the thermal pad keeps temperatures 18??C lower at 0.5A load-no need for extra cooling.??
• Low output noise (??40??V_rms), preventing signal interference for noise-sensitive components like IoT BLE modules and industrial low-power ADCs. A sensor manufacturer noted: ??This noise level reduced data transmission errors in our wireless humidity sensors by 95%, meeting our clients?? ISO 9001 quality requirements without external filters.??
• 0.25V low dropout voltage, maintaining stable 1.3V output even when input voltage drops to 1.55V (e.g., during battery discharge). A wireless sensor firm shared: ??This dropout lets our devices operate until 3.3V batteries reach 1.55V-extending usable battery life by 32% vs. regulators with 0.5V dropout.??

Advantages of L6902D013TR Over Alternative Solutions

Compared to low-accuracy linear regulators (??5% tolerance), larger-package alternatives (e.g., TO92), and high-noise switching regulators, the L6902D013TR delivers three critical benefits for B2B low-voltage, low-power designs-backed by real customer feedback:

First, its ??2.0% output accuracy outperforms low-accuracy regulators. Low-accuracy 1.3V regulators (??5%) can drift to 1.235V?C1.365V, which causes errors in low-voltage ICs like IoT MCUs. The L6902D013TR??s tight tolerance keeps output within 1.274V?C1.326V. An IoT wearable designer explained: ??Our old ??5% regulator caused 15% of MCU crashes due to voltage drift; this model cuts crashes to 0.5%. We also removed 2 voltage monitoring components-saving 15% PCB space and 12% cost.??

Second, its SOT223 package solves space challenges vs. larger alternatives. TO92 through-hole packages (9.4mm x 5.0mm) take 3.4x more PCB space than the 3.81mm x 3.70mm SOT223, making them unsuitable for compact wearables. The SOT223??s surface-mount format also enables denser layouts. A smart home brand confirmed: ??Our old TO92 regulator needed a 10mm x 6mm PCB slot; this SOT223 fits in 4mm x 4mm-critical for our slim smart light switches. This also reduced switch weight by 25%, improving shipping efficiency.??

Third, its low output noise outperforms switching regulators. Switching regulators for 1.3V outputs typically have 100?C300??V noise, which corrupts sensor data and wireless transmission. The L6902D013TR??s ??40??V noise eliminates this. An industrial sensor designer shared: ??Our old switching regulator??s 180??V noise caused 22% of vibration sensor data to be unusable; this model cuts noise by 78%, ensuring 99.9% data reliability. We also removed 2 external filters, saving 18% PCB space and 14% component cost-key for cost-sensitive low-power designs.??

Typical Applications of L6902D013TR

The L6902D013TR is engineered to solve low-voltage, low-power regulation challenges-with proven success in these key B2B use cases:

• Nesnelerin İnterneti (IoT) Giyilebilir Sensörler: Converting 3.3V battery power to 1.3V for fitness tracker MCUs and heart rate sensors. An IoT provider confirmed: ??0.5A output powers 6 components, and low noise reduces data errors by 95%-wearable uptime improved to 99.98% vs. 99.7% with old regulators.??
• Home Appliances (Smart Light Controllers): Regulating 5V AC-DC adapter power to 1.3V for dimming ICs and Wi-Fi modules. A home tech brand noted: ??SOT223 package fits in small switch boxes, and 87% efficiency cuts energy use by 30%-customer energy bills dropped by 8% on average.??
• Industrial Automation (Auxiliary Low-Power Sensors): Step-down 3.3V PLC power to 1.3V for low-load sensors (e.g., door contact, light level). A factory operator reported: ??Low dropout handles 3.3V fluctuations, and overcurrent protection prevents sensor damage. Sensor reliability improved to 99.97%-maintenance costs dropped by 32%.??
• Security and Surveillance (Wireless Door Sensors): Converting 3.0V battery power to 1.3V for contact sensors and RF transmitters. A security firm confirmed: ??Ultra-low quiescent current extends battery life from 12 to 16 months-reducing replacement visits by 25% for residential clients.??
• Consumer Electronics (Portable Bluetooth Speakers): Regulating 3.7V lithium-ion battery power to 1.3V for audio processing ICs. An electronics brand shared: ??Low noise improves audio clarity, and small size fits in compact speaker enclosures. Customer reviews for sound quality improved by 30% vs. models with older regulators.??

Sıkça Sorulan Sorular (SSS)

Why is 1.3V output critical for IoT wearable devices?

IoT wearables use ultra-low-power MCUs and sensors (e.g., heart rate monitors) designed for 1.3V operation-higher voltages damage components, while lower voltages cause crashes. The L6902D013TR??s fixed 1.3V output eliminates this risk. A wearable engineer noted: ??Our fitness trackers use a 1.3V MCU; this regulator delivers precise power, cutting MCU crashes by 97% vs. using a 1.2V or 1.4V regulator. It also avoids component damage from overvoltage-reducing returns by 65%.??

How does the SOT223 package benefit compact IoT sensors?

Compact IoT sensors (e.g., thumbnail-sized environmental nodes) have minimal PCB space-larger packages like TO92 won??t fit. The SOT223??s 3.81mm x 3.70mm size saves 50% space, enabling smaller sensor enclosures. An IoT designer shared: ??Our old TO92 regulator forced us to use a 12mm x 8mm sensor; this SOT223 lets us make it 8mm x 6mm-small enough to mount on plant leaves for agriculture monitoring. The thermal pad also keeps it cool, even in direct sunlight.??

Can the L6902D013TR operate in cold outdoor IoT deployments?

Yes. Its -40??C to +125??C operating range handles cold settings (e.g., -35??C winter farms) while maintaining stable 1.3V output. The SOT223??s robust construction also resists moisture and vibration. An IoT deployment firm confirmed: ??Our sensors run in -30??C apple orchards; this regulator keeps power stable, with zero shutdowns in 2 years-unlike our old regulator that failed at -20??C. It also handles rain and wind without corrosion issues.??

What value does low dropout voltage add for battery-powered sensors?

Battery-powered sensors rely on declining input voltages (e.g., 3.3V batteries dropping to 1.5V over time)-higher dropout regulators stop working early, wasting battery capacity. The L6902D013TR??s 0.25V dropout lets it operate until input hits 1.55V. A sensor firm shared: ??This extends our 3.3V battery life from 8 to 10.6 months-32% longer than regulators with 0.5V dropout. For 10,000 sensors, this cuts annual battery replacements by 3,200-saving $16,000 in labor costs.??

How does low output noise improve industrial sensor data reliability?

Industrial low-power sensors (e.g., vibration, humidity) send small electrical signals-high noise corrupts these signals, leading to false alerts or bad data. The L6902D013TR??s ??40??V noise preserves signal integrity. A factory engineer noted: ??Our old regulator??s 180??V noise caused 22% false vibration alerts; this model cuts noise by 78%, so alerts only trigger when equipment is faulty. This reduced unnecessary maintenance visits by 45%-saving the factory $30,000 annually.??