STMicroelectronics L5970D013TR Step-Down Regulator, TO252-5 Package for Industrial Power

STMicroelectronics L5970D013TR Step-Down Regulator Overview

The STMicroelectronics L5970D013TR is a rugged, fixed-output step-down (buck) voltage regulator engineered for reliable power delivery in industrial automation, automotive electronics, and low-voltage high-current systems. It integrates a low-resistance power switch, overcurrent protection, and thermal shutdown into a thermally efficient package-delivering a precise 1.3V output from a wide 4.5V?C36V input range. This design makes it a top choice for B2B engineers prioritizing voltage stability, current capacity, and durability in harsh operating environments such as factory floors, automotive engine bays, and industrial control panels.

As a product from STMicroelectronics-a global leader in semiconductor innovation with decades of expertise in industrial and automotive-grade power management-the device meets strict quality benchmarks for performance, reliability, and environmental compliance (including RoHS 2 certification). Senior engineers at a leading industrial automation firm endorse it, noting: ??The L5970D013TR??s 2A output and 36V input tolerance handle our 24V factory power fluctuations, with zero regulator failures in 4 years of 24/7 use.?? For more trusted industrial ICs and high-reliability power solutions, visit IC Manufacturer.

Technical Parameters of L5970D013TR

Key Technical Features of L5970D013TR

• Wide 4.5V?C36V input range, enabling compatibility with diverse power sources (12V automotive batteries, 24V industrial supplies, 36V HVAC systems) without external voltage clamping. An automotive electronics engineer reported this feature ??eliminated 99% of input voltage-related failures in our body control modules.??
• 2A continuous output current, delivering sufficient power for multi-sensor arrays (4x 0.5A temperature/humidity sensors, 1x 0.8A microcontroller). A factory automation designer noted ??one regulator powers our entire sensor suite, cutting component count by 50% vs. using two 1A regulators.??
• Exposed thermal pad in TO252-5 package, improving heat dissipation by 28% vs. standard TO252 packages. Industrial power supply engineers confirm ??this pad keeps the regulator 16??C cooler at 2A output, preventing thermal shutdown in tight factory enclosures.??
• Fixed 1.3V output with ??2% accuracy, ensuring stable power for precision low-voltage components (high-speed microcontrollers, analog-to-digital converters). A test equipment maker shared ??this accuracy reduced measurement errors in our data loggers by 65%.??
• Built-in protection mechanisms (overcurrent, thermal shutdown, soft start), safeguarding the regulator and connected loads from overloads, overheating, and inrush current. An automotive supplier noted ??these protections stopped 97% of regulator failures during vehicle battery short-circuit tests.??

Advantages of L5970D013TR Over Alternative Solutions

Compared to lower-current regulators (??1A), narrow-input-range regulators (??24V), or thermally inefficient packages, the L5970D013TR delivers three critical benefits for B2B high-reliability designs-backed by real customer feedback:

First, its 2A output eliminates parallel converter complexity. Lower-current 1A regulators force engineers to use two chips to power 1.5A+ loads (e.g., 4x 0.5A sensors), adding cost, PCB space, and failure points. The L5970D013TR??s 2A output handles these loads with one device. A senior industrial engineer explained: ??We used two 1A regulators for our 1.6A sensor module; switching to the L5970D013TR cut PCB space by 40% and reduced our Bill of Materials cost by 30%. Fewer components also mean fewer potential failures.??

Second, its 4.5V?C36V input range outperforms narrow-range alternatives. Regulators with ??24V max input fail in industrial systems with voltage spikes (24V supplies spiking to 32V during motor startup). The L5970D013TR??s 36V tolerance handles these spikes effortlessly. An industrial control panel designer confirmed ??our old 24V-input regulator failed 8% of the time during motor startup; the L5970D013TR has zero failures, even with 34V spikes. This reliability cut our maintenance calls by 85%.??

Third, its thermally enhanced TO252-5 package outpaces standard packages. Regulators in standard TO252 or SOT223 packages overheat at 1.5A+ output, causing thermal shutdown and system downtime. The L5970D013TR??s exposed thermal pad dissipates heat more effectively, maintaining stable operation at full 2A load. Per STMicroelectronics testing, the pad reduces junction temperature by 20??C at 2A vs. standard TO252. A factory maintenance manager shared ??our old regulator shut down 2x weekly due to overheating; the L5970D013TR runs 24/7 with no issues-saving 8+ hours of downtime monthly and boosting productivity.??

Typical Applications of L5970D013TR

The L5970D013TR is engineered to solve high-current, harsh-environment power regulation challenges-with proven success in these key B2B use cases:

• Industrial Automation (Sensor Arrays): Converting 24V factory power to 1.3V for 4x 0.5A pressure/temperature sensors. A factory operator confirmed ??sensors run continuously for 4 years with no power downtime, vs. 8-month failures with old regulators.??
• Automotive Electronics (Body Control Modules): Regulating 12V battery power to 1.3V for BCM microcontrollers. An automotive supplier noted ??the 36V input tolerance handles load dumps, and 2A output powers our BCM??s LED driver with no voltage drops.??
• Test and Measurement (Portable Data Loggers): Converting 5V USB or 12V bench power to 1.3V for precision ADCs. A test equipment maker reported ??the ??2% output accuracy reduced data logger errors by 65%, meeting our clients?? ISO calibration standards.??
• Energy and Power (Industrial Inverters): Step-down 24V inverter power to 1.3V for control circuits. A renewable energy firm shared ??the 2A output handles peak loads, and thermal pad prevents overheating in indoor inverter cabinets.??
• Security and Surveillance (Wired Cameras): Regulating 12V POE power to 1.3V for camera processors. A security firm confirmed ??the regulator??s 91% efficiency cuts heat in camera housings, and 2A output supports 1080p video processing.??

Frequently Asked Questions (FAQ)

Why is the 4.5V?C36V input range important for industrial control panels?

Industrial control panels use 24V power supplies that often spike to 32V+ during motor startup or load changes. The L5970D013TR??s 36V input range handles these spikes, ensuring stable 1.3V output for control microcontrollers. An industrial engineer noted ??our old 24V-input regulator failed 8% of the time during motor startup; this one works reliably, reducing control panel downtime by 85%. It also eliminates external voltage clamps, simplifying design.??

How does the 2A output current benefit automotive body control modules?

Automotive body control modules (BCMs) power multiple loads-e.g., 0.8A LED drivers, 0.5A door lock motors, and 0.4A window controllers-totaling 1.7A. Lower-current 1A regulators require parallel chips, adding cost and space. The L5970D013TR??s 2A output handles these loads with one device. An automotive designer shared ??this cut our BCM PCB space by 40% and component cost by 30%, while ensuring stable power for all BCM functions-critical for vehicle reliability.??

Can the L5970D013TR operate in extreme temperature environments?

Yes. Its -40??C to +125??C operating range and exposed thermal pad in the TO252-5 package handle extreme temperatures (e.g., -30??C automotive cold starts, 60??C factory floors). The thermal pad dissipates heat 28% better than standard packages, keeping the regulator within safe temperatures at 2A output. A factory maintenance manager confirmed ??our factory runs at 58??C, and the regulator stays 82??C-well below its 125??C max. We??ve had zero thermal shutdowns in 3 years.??

What value does the fixed 1.3V output with ??2% accuracy add for portable data loggers?

Portable data loggers use precision ADCs that require stable, accurate power to avoid measurement errors. The L5970D013TR??s fixed 1.3V output with ??2% accuracy ensures consistent power for ADCs, reducing errors. A test equipment engineer noted ??our data loggers had 9% error with a ??5% regulator; this one cuts error to 2.5%, meeting our clients?? strict calibration standards. No more manual adjustments, saving time for our technicians.??

How does overcurrent protection safeguard industrial sensor arrays?

Industrial sensor arrays often face short-circuit risks (e.g., a sensor wire touching 24V power) that can damage regulators and sensors. The L5970D013TR??s overcurrent protection (2.5A typical) shuts down temporarily when current exceeds safe levels, preventing damage. An industrial sensor maker shared ??before this regulator, short circuits destroyed 12+ sensors monthly; now the regulator recovers automatically, and sensors stay intact-saving $9,600 annually in replacement parts.??