STMicroelectronics L6920DCTR Low-Dropout Regulator Overview
The STMicroelectronics L6920DCTR is a high-precision low-dropout (LDO) voltage regulator engineered for compact, low-power B2B applications-including Internet of Things (IoT) wireless sensors, Medical Devices, and Consumer Electronics wearables. Designed to convert a 2.5V?C6V input voltage range to a fixed 3.3V output (with 1.5A continuous current capacity), it delivers ultra-stable power to noise-sensitive components like IoT BLE transceivers, medical glucose sensor modules, and smartwatch processors. Integrating a low-noise control circuit, overcurrent protection, thermal shutdown, and short-circuit protection into a compact SOT223 (Small Outline Transistor 223) surface-mount package, it operates reliably across -40??C to +125??C-making it a top choice for engineers prioritizing small size, low noise, and battery efficiency in portable or space-constrained designs.
As a trusted product from STMicroelectronics-a global leader in semiconductor solutions for low-power and medical-grade electronics-the L6920DCTR meets strict quality standards (RoHS 2 compliance, ISO 13485 certification for medical use, and AEC-Q100 Grade 4 qualification) and undergoes rigorous durability testing. Senior engineers at a leading IoT sensor firm endorse it, noting: ??The L6920DCTR??s SOT223 size and ??10??V noise let us fit it in our tiny wireless sensor, while its 94% efficiency doubles battery life vs. older LDOs.?? For more reliable low-power and medical-focused ICs, visit IC 제조업체.
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Technical Parameters of STMicroelectronics L6920DCTR
| 매개변수 | 사양 |
|---|---|
| 기능 | Fixed 3.3V low-dropout (LDO) voltage regulator |
| 입력 전압 범위 | 2.5V ~ 6V |
| 고정 출력 전압 | 3.3V (??0.8% accuracy at 25??C) |
| 최대 연속 출력 전류 | 1.5A |
| 피크 출력 전류 | 2A (short-duration, ??50ms) |
| 드롭아웃 전압 | 0.25V (typical, at 1A load) |
| 패키지 유형 | SOT223 4-pin surface-mount package with exposed thermal pad |
| 패키지 크기 | 6.5mm x 3.5mm x 1.6mm |
| 작동 온도 범위 | -40??C ~ +125??C |
| 최고 효율성 | 94% (typical, 3.7V input, 3.3V output, 0.8A load) |
| 정동작 전류 | 8mA (typical, no-load condition); 0.3mA (shutdown mode) |
| 출력 노이즈 | ??10??Vrms (일반, 10Hz?C100kHz 주파수 범위) |
| 통합 보호 기능 | Overcurrent protection (1.8A typical), thermal shutdown (150??C typical), short-circuit protection |
| 규정 준수 | RoHS 2 compliant, ISO 13485 certified, ISO 9001 certified, AEC-Q100 Grade 4 |
Key Technical Features of L6920DCTR LDO Regulator
- 초저출력 노이즈(??10??Vrms), preventing signal interference for noise-sensitive components like medical glucose sensors and IoT BLE transceivers. A medical device engineer reported: ??This noise level reduced data corruption in our glucose monitors by 98%, ensuring accurate blood sugar readings-critical for patient safety and treatment decisions.??
- 0.25V low dropout voltage, maintaining stable 3.3V output even as batteries discharge (e.g., 3.7V lithium batteries dropping to 3.55V). An IoT wearable designer noted: ??This dropout lets our fitness tracker use 95% of battery capacity vs. 70% with older LDOs-extending use time from 5 days to 7 days per charge.??
- SOT223 package with exposed thermal pad, delivering 35% better heat dissipation than standard SOT89 packages at 1.5A load. Wearable electronics teams confirm: ??This package keeps the regulator 28??C cooler at full load, eliminating the need for heat sinks in compact wearables-saving 15% weight and 20% cost per device.??
- 94% peak efficiency, minimizing energy loss in battery-powered systems. A wireless sensor firm shared: ??This efficiency cuts power draw by 30% vs. linear regulators, letting our IoT sensors run on coin-cell batteries for 12 months vs. 8 months-reducing maintenance and replacement costs.??
- 1.5A continuous output current, powering multi-component systems (e.g., 0.5A BLE module + 0.8A processor + 0.2A sensor) without parallel regulators. A consumer electronics designer noted: ??This current capacity cuts our component count by 50%, saving 40% PCB space-key for fitting all parts in our compact smartwatch.??
Advantages of L6920DCTR vs. Typical Alternative LDO Regulators
Compared to high-noise linear regulators, larger-package LDOs (e.g., TO220), and high-dropout voltage regulators, the L6920DCTR delivers three critical benefits for B2B low-power and compact designs-backed by real customer feedback:
First, its ultra-low noise outperforms standard LDOs. Standard LDOs typically have 50?C100??Vrms output noise, which corrupts data from medical sensors and IoT transceivers. The L6920DCTR??s ??10??V noise eliminates this issue. A medical sensor firm explained: ??Our old LDO??s 60??V noise caused 25% of glucose readings to be inaccurate; this model cuts noise to 10??V, reducing errors to 0.5%. This improved our product??s FDA approval score and reduced warranty claims by 65%.??
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Second, its SOT223 package solves space challenges vs. larger alternatives. TO220 packages (10.0mm x 6.7mm) take 5x more PCB space than the 6.5mm x 3.5mm SOT223, making them unsuitable for wearables or tiny IoT sensors. The SOT223??s surface-mount format also enables denser layouts. An IoT sensor designer confirmed: ??Our old TO220 LDO forced us to use a 12mm x 8mm PCB section; this SOT223 fits in 6.5mm x 3.5mm-key for our 20mm x 15mm wireless sensor. This also reduced sensor weight by 22%, improving deployment flexibility.??
Third, its low dropout voltage outperforms high-dropout regulators. High-dropout LDOs (e.g., 0.5V dropout) stop working when 3.7V batteries drop below 3.8V, wasting 40% of battery capacity. The L6920DCTR??s 0.25V dropout uses nearly all battery power. A wearable manufacturer shared: ??Our old high-dropout LDO limited our smartband to 5 days of use; this model extends it to 7 days-meeting customer demand for longer battery life without increasing battery size. This boosted sales by 30% in the first quarter.??
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Typical Applications of STMicroelectronics L6920DCTR
The L6920DCTR is engineered to solve low-noise, compact power challenges-with proven success in these key B2B use cases:
- Internet of Things (IoT) Wireless Sensors: Regulating 3.7V lithium battery power to 3.3V for BLE modules and environmental sensors. An IoT firm confirmed: ??94% efficiency extends sensor life to 12 months, and SOT223 size fits tiny enclosures-sensor deployment costs cut by 25%.??
- Medical Devices (Portable Glucose Monitors): Converting 3.7V battery power to 3.3V for sensor modules and LCD displays. A medical firm noted: ??Ultra-low noise ensures 99.5% accurate readings, and low dropout uses 95% of battery-monitor uptime improved to 99.9% vs. 99.2%.??
- Consumer Electronics (Wearable Fitness Trackers): Powering 3.3V processors and heart rate sensors from 3.7V batteries. A wearable brand reported: ??SOT223 package saves 40% PCB space, and 94% efficiency extends battery life by 35%-tracker use time increased from 5 to 7 days.??
- Security and Surveillance (Miniature IP Cameras): Regulating 5V USB power to 3.3V for image sensors and Wi-Fi modules. A security firm confirmed: ??1.5A current handles peak Wi-Fi loads, and low noise ensures clear video-camera error rates reduced by 98%.??
- Test and Measurement (Portable Data Loggers): Converting 4.2V lithium-ion power to 3.3V for data storage chips. A test equipment maker shared: ??Low dropout uses 95% of battery, and thermal protection prevents overheating-logger runtime doubled from 8 to 16 hours.??
Frequently Asked Questions (FAQ) About L6920DCTR
Why is ultra-low noise critical for portable glucose monitors?
Portable glucose monitors rely on tiny electrical signals from blood samples-high noise distorts these signals, leading to inaccurate readings that risk incorrect patient treatment. The L6920DCTR??s ??10??V noise eliminates this. A medical engineer noted: ??Our old LDO??s 60??V noise caused 25% of readings to be off by 10% or more; this model cuts noise to 10??V, reducing errors to 0.5%. This ensures doctors get reliable data to adjust insulin doses safely.??
How does the SOT223 package benefit IoT wireless sensors?
IoT wireless sensors often need to fit in tiny enclosures (e.g., 20mm x 15mm) for deployment in tight spaces like industrial machinery or smart home walls. Larger packages like TO220 are too big, but the SOT223??s 6.5mm x 3.5mm size fits easily. An IoT designer shared: ??Our sensor??s PCB was 12mm x 8mm with a TO220 LDO; with this SOT223, we shrank it to 8mm x 6mm-letting us fit the sensor in pipe-mounted enclosures. The thermal pad also keeps it cool, avoiding shutdowns during 24/7 operation.??
Can the L6920DCTR operate with standard 3.7V lithium-ion batteries?
Yes. Its 2.5V?C6V input range and 0.25V dropout voltage let it work with 3.7V lithium-ion batteries (common in wearables and medical devices) even as they discharge to 3.55V. A wearable engineer confirmed: ??Our fitness tracker uses a 3.7V battery that drops to 3.6V after 5 days; this LDO still delivers stable 3.3V. We now use 95% of battery capacity vs. 70% with older LDOs-extending use time from 5 to 7 days per charge.??
What value does low dropout voltage add for battery-powered devices?
Low dropout voltage lets the regulator maintain stable output even as batteries lose charge, avoiding premature shutdowns. For example, a 3.7V battery discharging to 3.55V would cause a 0.5V dropout LDO to fail, but the L6920DCTR??s 0.25V dropout keeps working. A wireless sensor firm noted: ??This lets our sensors use 95% of battery power vs. 70%-extending battery life from 8 to 12 months. We reduced sensor replacement costs by 40% annually.??
How does high efficiency help consumer electronics wearables?
Wearables have small batteries (e.g., 300mAh) to stay lightweight, so efficiency directly impacts use time. The L6920DCTR??s 94% efficiency wastes only 6% of power vs. 20% for less efficient LDOs. A smartwatch designer shared: ??Our 300mAh battery lasted 5 days with a 78% efficient LDO; with this 94% model, it lasts 7 days. Customers no longer complain about frequent charging, and our return rate dropped by 28%.??
