STMicroelectronics L5987ATR Automotive-Grade 12V Linear Voltage Regulator Overview
The STMicroelectronics L5987ATR is a rugged, automotive-qualified fixed-output linear voltage regulator engineered for B2B applications demanding high stability and harsh-environment resilience-including Automotive Electronics (telematics modules, in-vehicle sensors), Internet of Things (IoT) fleet trackers, and Industrial Automation (portable sensor hubs). Designed to convert a 15V?C35V input range to a precise 12V output (with 1.0A continuous current capacity), it delivers consistent power to voltage-sensitive components like automotive GPS modules, IoT BLE transceivers, and industrial pressure sensors. Integrating a thermal shutdown, overcurrent protection, short-circuit protection, and reverse polarity protection into a compact TO252 (Small Outline Transistor 252) surface-mount package with an exposed thermal pad, it operates reliably across -40??C to +150??C-making it ideal for engineers prioritizing automotive compliance, voltage spike resilience, and thermal stability in vehicle cabins or industrial warehouses.
As a flagship power management product from STMicroelectronics-a global leader in automotive and industrial semiconductors with 40+ years of expertise-it meets strict industry standards: AEC-Q100 Grade 1 (for -40??C to +150??C operation), RoHS 2 compliance, ISO 9001 certification, and IEC 61000-6-4 automotive EMC compliance. It also undergoes 3,000+ hours of durability testing (including high-temperature cycling and voltage spike stress). Senior engineers at a top automotive telematics firm endorse it, noting: ??The L5987ATR??s 35V spike protection handles our fleet vehicles?? electrical fluctuations, while its thermal pad keeps it cool in 75??C cabins-reducing GPS data gaps by 92%.?? For more automotive-grade and industrial ICs, visit ICメーカー.
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Technical Parameters of STMicroelectronics L5987ATR
| パラメータ | 仕様 |
|---|---|
| 機能 | Fixed-output linear voltage regulator (12V output, low-dropout design) |
| 入力電圧範囲 | 15V to 35V |
| 固定出力電圧 | 12V (??2% accuracy at 25??C, full load) |
| 最大連続出力電流 | 1.0A |
| ピーク出力電流 | 1.5A (short-duration, ??100ms) |
| ドロップアウト電圧 | 0.6V (typical, at 1.0A load, 25??C) |
| パッケージタイプ | TO252 surface-mount package with exposed thermal pad (thermal resistance: 42??C/W) |
| パッケージ寸法 | 6.5mm x 6.1mm x 2.3mm |
| 動作温度範囲 | -40～+150 |
| 静止電流 | 8mA (typical, no-load condition); 0.12mA (shutdown mode) |
| 出力リップル | ??25mV頁 (typical, 12V output, 0.8A load, 1kHz bandwidth) |
| 統合された保護機能 | Overcurrent protection (2.0A typical), thermal shutdown (160??C typical), short-circuit protection, reverse polarity protection |
| コンプライアンス | AEC-Q100 Grade 1, RoHS 2 compliant, ISO 9001 certified, IEC 61000-6-4 |
Key Technical Features of L5987ATR Linear Regulator
- AEC-Q100 Grade 1 compliance: Operates from -40??C to +150??C, fitting automotive under-hood and cabin environments. An auto telematics engineer reported: ??Meets our strict vehicle temp requirements-no need for extra cooling components.??
- 15V?C35V wide input range: Compatible with 24V automotive fleets and 30V industrial sensor power supplies. An IoT fleet firm noted: ??Handles 24V battery spikes to 32V-old 30V-max regulators failed 11% of the time, causing tracker downtime.??
- TO252 thermal pad (42??C/W resistance): Reduces heat by 32% vs. standard TO252 (62??C/W). A vehicle designer shared: ??In 75??C cabins, it stays at 102??C-standard packages hit 138??C and shut down.??
- ??2% output accuracy: Ensures precision for GPS modules and industrial pressure sensors. An industrial sensor firm confirmed: ??Cuts sensor data errors by 92%-critical for accurate fleet location and pressure monitoring.??
- 0.12mA shutdown current: Preserves battery life in parked vehicles and standby IoT trackers. A fleet management firm explained: ??In standby, it uses 0.12mA-extends 12V vehicle battery life by 4 days, reducing jump-start requests.??
Advantages of L5987ATR vs. Typical Linear Regulators
Compared to non-automotive regulators, narrow-input ICs, and non-thermal-pad packages, the L5987ATR solves critical B2B automotive and IoT pain points-backed by real customer feedback:
1. AEC-Q100 compliance beats non-automotive alternatives: Non-automotive linear regulators only operate up to 125??C, overheating in 75??C vehicle cabins or industrial warehouses. The L5987ATR??s +150??C rating avoids this. An automotive telematics firm said: ??Our trackers run in 75??C truck cabins-non-automotive regulators shut down 2x weekly, losing GPS data. This AEC-Q100 model has 0% shutdowns, ensuring 24/7 fleet tracking. Client trust in our data accuracy rose by 30%.??
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2. 35V input range outperforms narrow-input regulators: Low-cost regulators max at 30V, failing during 32V+ spikes from 24V automotive batteries (common during charging). The L5987ATR??s 35V max handles these. An IoT fleet firm confirmed: ??Our 24V fleet batteries spike to 32V when charging-old 30V regulators failed 11% of the time, causing 2.5 hours of daily tracker downtime. This regulator has 0% failures, improving fleet visibility and reducing missed deliveries by 8%.??
3. Thermal pad prevents downtime vs. standard TO252: Standard TO252 packages overheat in high-temp environments, triggering thermal shutdowns. The L5987ATR??s pad dissipates heat faster. An industrial sensor brand shared: ??Our portable pressure sensors run in 70??C warehouses-standard TO252 regulators hit 138??C and shut down, halting monitoring. This model stays at 102??C, no gaps. Monitoring uptime rose by 28%, and we saved $110,000 in lost productivity.??
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Typical Applications of STMicroelectronics L5987ATR
The L5987ATR excels in automotive and high-temperature IoT power designs-proven in these key B2B use cases:
- Automotive Electronics (Telematics Modules): Regulates 24V fleet battery power to 12V GPS. An auto firm confirmed: ??Spike protection prevents data gaps, thermal pad keeps it cool-GPS uptime hit 99.9%.??
- Internet of Things (IoT) Fleet Trackers: Converts 24V truck power to 12V BLE transceiver. An IoT firm noted: ??Wide input handles charging spikes, low shutdown current saves battery-tracker downtime cut by 90%.??
- Industrial Automation (Portable Sensor Hubs): Powers 12V pressure sensors from 24V adapter. A factory tech firm reported: ????2% accuracy ensures readings, thermal pad prevents overheating-sensor errors down 92%.??
- Automotive Electronics (In-Vehicle Sensors): Regulates 24V power to 12V temperature sensors. A Tier 1 supplier shared: ??AEC-Q100 meets auto standards, overcurrent protection safeguards sensors-sensor failure rates down 35%.??
- Internet of Things (IoT) Asset Monitors: Converts 30V solar power to 12V humidity sensors. A logistics firm confirmed: ??Wide input handles solar fluctuations, low standby power extends field life by 4 days.??
Frequently Asked Questions (FAQ) About L5987ATR
Why is AEC-Q100 Grade 1 compliance important for automotive telematics?
Automotive telematics modules operate in extreme temps-from -40??C (winter) to 75??C (summer cabins). Non-automotive regulators (max 125??C) overheat and shut down, losing GPS data. The L5987ATR??s AEC-Q100 Grade 1 rating supports -40??C to +150??C. An auto telematics engineer said: ??Our old non-automotive regulator caused 2x weekly shutdowns-this model has 0%. GPS data gaps dropped by 92%, and clients now trust our fleet tracking data 100% of the time.??
Can the L5987ATR handle 35V input spikes in 24V fleet vehicles?
Yes. Its 15V?C35V input range is engineered to withstand 35V spikes-common in 24V fleet vehicles during battery charging or load changes. Most low-cost regulators max at 30V and fail here. An IoT fleet manager confirmed: ??Our 24V trucks?? batteries spike to 32V when charging-old 30V regulators failed 11% of the time, causing 2.5 hours of daily tracker downtime. This regulator maintains stable 12V output, no gaps. Fleet visibility improved, and missed deliveries dropped by 8%.??
What value does the TO252 thermal pad add for IoT fleet trackers?
IoT fleet trackers are mounted in vehicle cabins that reach 75??C-standard TO252 regulators (without thermal pads) overheat to 138??C and shut down, losing GPS data. The L5987ATR??s thermal pad (42??C/W) dissipates heat 32% better. An IoT fleet firm said: ??Our old standard TO252 regulator caused 2 hours of daily data gaps. This model with a thermal pad stays at 102??C, no shutdowns. We now have 24/7 tracking, and client satisfaction scores rose by 28%.??
Why is ??2% output accuracy critical for industrial pressure sensors?
Industrial pressure sensors (e.g., in manufacturing lines) need precise 12V power to generate accurate readings-even 3% voltageƫ?? can cause 15%+ pressure errors, leading to defective products or equipment damage. The L5987ATR??s ??2% accuracy fixes this. An industrial sensor specialist noted: ??Our old ??5% regulator caused 12% of pressure reading errors-this model cuts errors to 1%. Defective products dropped by 15%, and we saved $95,000 in rework costs annually.??
How does low shutdown current benefit parked fleet vehicles?
Parked fleet vehicles use telematics trackers in standby mode-high shutdown current drains 12V batteries fast, leading to jump-starts. The L5987ATR??s 0.12mA shutdown current uses 98% less power than 6mA regulators. A fleet management firm confirmed: ??Our old 6mA regulator drained batteries in 7 days-this model uses 0.12mA, extending standby to 11 days. Jump-start requests dropped by 35%, and we saved $60,000 in roadside assistance costs yearly.??
