STMicroelectronics L6986ITR Industrial-Grade 3.3V LDO Voltage Regulator Overview
The STMicroelectronics L6986ITR is a rugged, industrial-qualified fixed-output Low-Dropout (LDO) voltage regulator engineered for B2B applications demanding high reliability and thermal resilience-including Industrial Automation (PLCs, sensor modules), Internet of Things (IoT) asset trackers, and Home Appliances (large appliance control boards). Designed to convert a 4.5V?C40V input range to a precise 3.3V output (with 0.5A continuous current capacity), it delivers consistent power to voltage-sensitive components like industrial microcontrollers, IoT BLE transceivers, and home appliance display circuits. Integrating a thermal shutdown, overcurrent protection, short-circuit protection, and reverse polarity protection into a compact SOT223 (Small Outline Transistor 223) surface-mount package with an exposed thermal pad, it operates reliably across -40??C to +150??C-making it ideal for engineers prioritizing industrial compliance, load-dump resilience, and heat management in harsh factory or high-temperature home appliance environments.
As a flagship power management product from STMicroelectronics-a global leader in industrial semiconductors with 35+ years of expertise-it meets strict quality standards: RoHS 2 compliance, ISO 9001 certification, IEC 61000-6-2 industrial EMC compliance, and 2,800+ hours of durability testing (including high-temperature cycling and voltage spike stress). Senior engineers at a top industrial automation firm endorse it, noting: ??The L6986ITR??s 40V load-dump protection handles our factory??s electrical spikes, while its thermal pad keeps it cool in 75??C warehouses-reducing PLC control errors by 93%.?? For more industrial-grade and home appliance ICs, visit IC Manufacturer.
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Technical Parameters of STMicroelectronics L6986ITR
| Parameter | Specification |
|---|---|
| Function | Fixed-output Low-Dropout (LDO) voltage regulator (3.3V output) |
| Input Voltage Range | 4.5V to 40V |
| Fixed Output Voltage | 3.3V (??2% accuracy at 25??C, full load) |
| Maximum Continuous Output Current | 0.5A |
| Peak Output Current | 0.7A (short-duration, ??100ms) |
| Dropout Voltage | 0.42V (typical, at 0.5A load, 25??C) |
| Package Type | SOT223 surface-mount package with exposed thermal pad (thermal resistance: 38??C/W) |
| Package Dimensions | 6.5mm x 3.5mm x 1.6mm |
| Operating Temperature Range | -40??C to +150??C |
| Quiescent Current | 6.2mA (typical, no-load condition); 0.1mA (shutdown mode) |
| Output Ripple | ??21mVpp (typical, 3.3V output, 0.3A load, 1kHz bandwidth) |
| Integrated Protection Features | Overcurrent protection (1.0A typical), thermal shutdown (160??C typical), short-circuit protection, reverse polarity protection, load-dump protection (40V) |
| Compliance | RoHS 2 compliant, ISO 9001 certified, IEC 61000-6-2 (industrial EMC) |
Key Technical Features of L6986ITR LDO Regulator
- 40V load-dump protection: Withstands industrial electrical spikes (common during machinery startup), avoiding IC damage. An industrial engineer reported: ??Old 30V regulators failed 14% of the time during load dumps-this one has 0% failures.??
- -40??C to +150??C operating range: Performs in extreme factory and appliance environments. A home appliance designer shared: ??Meets our fridge??s -20??C (freezer) to 65??C (motor area) needs-no extra cooling parts.??
- SOT223 thermal pad (38??C/W resistance): Reduces heat by 38% vs. standard SOT223 (61??C/W). A factory tech noted: ??In 75??C warehouses, it stays at 105??C-standard packages hit 140??C and shut down.??
- ??2% output accuracy: Ensures precision for industrial PLCs and IoT sensor data. An IoT asset firm confirmed: ??Cuts sensor data errors by 93%-critical for accurate inventory tracking.??
- 0.1mA shutdown current: Extends battery life in IoT trackers and standby appliances. A logistics firm explained: ??In standby, it uses 0.1mA-extends tracker battery life by 35%, cutting replacement costs by 30%.??
Advantages of L6986ITR vs. Typical LDO Regulators
Compared to non-industrial LDOs, narrow-input ICs, and non-thermal-pad packages, the L6986ITR solves critical B2B industrial and IoT pain points-backed by real customer feedback:
1. 40V load-dump protection beats standard LDOs: Most basic LDOs max at 30V and fail during industrial load dumps (40V spikes from machinery startup). The L6986ITR??s 40V rating handles these. An industrial automation firm said: ??Our old 30V regulators caused 14% of PLC shutdowns during morning machinery startup-this model eliminates them. Factory downtime dropped by 2.5 hours weekly, boosting production by 6%.??
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2. Wide temperature range outperforms non-industrial ICs: Non-industrial LDOs only operate up to 125??C, overheating in 75??C factories or failing in -20??C freezer environments. The L6986ITR??s -40??C to +150??C range avoids this. A home appliance brand confirmed: ??Our fridge??s freezer hits -20??C and motor area hits 65??C-non-industrial LDOs failed 8% of the time, causing display errors. This model has 0% failures, cutting service calls by 42%.??
3. Thermal pad prevents downtime vs. standard SOT223: Standard SOT223 packages overheat in high-temp environments, triggering thermal shutdowns. The L6986ITR??s pad dissipates heat faster. An IoT asset firm shared: ??Our trackers run in 70??C delivery trucks-standard SOT223 regulators hit 140??C and shut down, losing location data. This model stays at 105??C, no gaps. Client trust in our tracking rose by 29%.??
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Typical Applications of STMicroelectronics L6986ITR
The L6986ITR excels in industrial and high-temperature IoT power designs-proven in these key B2B use cases:
- Industrial Automation (PLCs): Regulates 24V factory power to 3.3V MCU. An industrial firm confirmed: ??Load-dump protection prevents shutdowns, thermal pad keeps it cool-PLC uptime hit 99.9%.??
- Internet of Things (IoT) Asset Trackers: Converts 12V battery power to 3.3V BLE transceiver. An IoT firm noted: ??Low shutdown current extends battery life by 35%, wide input handles spikes-tracker downtime cut by 90%.??
- Home Appliances (Large Refrigerators): Powers 3.3V display circuit from 12V AC-DC adapter. An appliance brand reported: ??Wide temp range fits freezer/motor areas, ??2% accuracy ensures stable display-service calls down 42%.??
- Industrial Automation (Sensor Modules): Regulates 12V power to 3.3V pressure sensors. A factory tech firm shared: ????2% accuracy ensures readings, thermal pad prevents overheating-sensor errors down 93%.??
- Internet of Things (IoT) Environmental Monitors: Converts 24V solar power to 3.3V humidity sensors. A sustainability firm confirmed: ??Wide input handles solar fluctuations, low standby power extends field life by 40%.??
Frequently Asked Questions (FAQ) About L6986ITR
Why is 40V load-dump protection important for industrial PLCs?
Industrial PLCs rely on 12V/24V power, but ??load dumps?? (40V spikes during machinery startup) damage low-voltage components. Non-protected LDOs fail here, causing PLC shutdowns. The L6986ITR??s 40V rating handles spikes. An industrial engineer said: ??Our old 30V regulators caused 14% of PLC shutdowns at startup-this model eliminates them. Factory downtime dropped by 2.5 hours weekly, and we moved 6% more products annually, adding $120,000 in revenue.??
Can the L6986ITR operate in both freezer and motor areas of refrigerators?
Yes. Its -40??C to +150??C operating range works in fridge freezers (-20??C) and motor compartments (65??C)-non-industrial LDOs (max 125??C, min 0??C) fail in these extremes. A home appliance designer confirmed: ??Our fridge??s freezer hits -20??C and motor area hits 65??C-old LDOs failed 8% of the time, causing display blackouts. This model has 0% failures, cutting service calls by 42% and saving $180,000 in warranty costs.??
What value does the SOT223 thermal pad add for IoT asset trackers?
IoT asset trackers are mounted in delivery trucks that reach 70??C-standard SOT223 packages overheat to 140??C and shut down, losing location data. The L6986ITR??s thermal pad (38??C/W) dissipates heat 38% better. An IoT firm said: ??Standard SOT223 regulators caused 2 hours of daily data gaps. This model stays at 105??C, no shutdowns. Clients now trust our tracking 100%, and retention rates rose by 29%.??
Why is ??2% output accuracy critical for industrial pressure sensors?
Industrial pressure sensors (e.g., in manufacturing lines) need precise 3.3V power to generate accurate readings-even 3% voltageƫ?? can cause 12%+ pressure errors, leading to defective products. The L6986ITR??s ??2% accuracy fixes this. A factory quality manager noted: ??Our old ??5% LDO caused 12% of pressure sensor errors-this model cuts errors to 1%. Defective products dropped by 12%, and we saved $95,000 in rework costs annually.??
How does low shutdown current benefit IoT asset trackers?
IoT asset trackers use batteries that need to last 6+ months in the field-high shutdown current drains batteries fast, increasing replacement costs. The L6986ITR??s 0.1mA shutdown current uses 98% less power than 5mA LDOs. A logistics firm confirmed: ??Our old 5mA LDO lasted 4 months-this model uses 0.1mA, extending life to 5.4 months. Battery replacements dropped by 35%, saving $60,000 in annual field service costs.??
