STPM801 - Programmable Current Limiting Switch | STMicroelectronics
부품 번호: STPM801 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.76 | $7.60 |
| 100 | $0.68 | $68.00 |
| 500 | $0.61 | $305.00 |
| 1,000 | $0.55 | $550.00 |
STPM801 개요
A current limiting switch is a type of power management IC that controls the flow of electrical current to a load, protecting the power source and the load from overcurrent conditions. It is a key component in the power management hierarchy, sitting between the power source (such as a battery or USB port) and the load (such as a peripheral device). By integrating a MOSFET switch, current sensing, and protection features, it simplifies circuit design and enhances system reliability.
Key features of the STPM801 include programmable current limiting via an external resistor, allowing designers to set the current limit from 100mA to 1.5A. It also features a low quiescent current of 50µA, a fast 1ms turn-on time, and a low on-resistance of 70mΩ, minimizing power loss. The device includes thermal shutdown at 150°C and under-voltage lockout at 2.5V, ensuring safe operation under fault conditions. It is available in a compact SOT-23-5 package, ideal for space-constrained designs.
The STPM801 uses a high-side N-channel MOSFET architecture with an internal charge pump to drive the gate, enabling low voltage drop and efficient power delivery. The current limit is set by an external resistor connected to the ILIM pin, providing flexibility for different applications. The device also features a fault output pin that signals overcurrent or thermal shutdown events, enabling system-level monitoring and control.
Typical applications include USB port power distribution, hot-swap power management, and general-purpose load switching in consumer electronics, industrial control, and automotive systems. The wide input voltage range and programmable current limit make it versatile for various power distribution scenarios.
When designing with the STPM801, ensure the external current-limit resistor is placed close to the ILIM pin to minimize parasitic inductance. The input and output capacitors should be placed near the device to ensure stable operation and reduce voltage transients. Proper thermal management is essential when operating at high currents, as the device dissipates power proportional to the current and voltage drop.
드롭인 대체품: STPM801 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
STPM802
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TPS2041
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MIC2005
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
STPM801 최대 정격 & 전기적 특성
| 입력 전압 범위 | 2.7 V to 5.5 V |
| Maximum Continuous Current | 1.5 A |
| Programmable Current Limit Range | 100 mA to 1.5 A |
| On-Resistance | 70 mΩ |
| 대기 전류 | 50 µA |
| Turn-On Time | 1 ms |
| Thermal Shutdown Temperature | 150 °C |
| Under-Voltage Lockout | 2.5 V |
| Fault Output | Active-low open-drain |
| 패키지 | SOT-23-5 |
| 실장 유형 | Surface Mount |
| 동작 온도 범위 | -40 °C to +85 °C |
| RoHS 상태 | Compliant |
| MSL 레벨 | 1 |
| 출력 유형 | High-side switch |
STPM801 핀 구성
| 핀 1 | IN — Input voltage supply |
| 핀 2 | GND — Ground |
| 핀 3 | EN — Enable (active high) |
| 핀 4 | ILIM — Current limit set resistor connection |
| 핀 5 | OUT — Switched output |
일반적인 애플리케이션
STPM801 적합 용도: 6 애플리케이션s: USB Port Power Switching, Hot-Swap Power Management, Battery-Powered Devices, Industrial Control Systems, Automotive Electronics, IoT and Smart Home Devices.
USB Port Power Switching
The STPM801 is ideal for USB port power switching. Its 2.7V to 5.5V input range covers USB 5V, and the programmable current limit (up to 1.5A) allows you to set the current limit to meet USB specifications (e.g., 500mA for USB 2.0, 1.5A for USB 3.0). The low on-resistance (70mΩ) minimizes voltage drop, ensuring reliable power delivery to peripherals. The thermal shutdown and under-voltage lockout protect the port and downstream devices from fault conditions. In a typical USB hub, the STPM801 is placed between the 5V rail and each USB port, with the ILIM resistor set to the desired current limit. The fault output can be connected to a microcontroller to indicate overcurrent events, enabling system-level monitoring and control. Compared to discrete MOSFET switches, the STPM801 integrates protection features, reducing component count and board space.
추천
Hot-Swap Power Management
The STPM801 is well-suited for hot-swap power management in servers and storage systems. Its programmable current limit allows designers to set a safe inrush current limit, preventing voltage droops and system resets when boards are inserted into a live backplane. The device's fast 1ms turn-on time ensures quick power-up, while the thermal shutdown protects against prolonged overcurrent conditions. In a typical hot-swap application, the STPM801 is placed in series with the board's power input, with the ILIM resistor set to the maximum allowable current. The fault output can trigger an LED or interrupt to alert the system of a fault. The low quiescent current (50µA) minimizes standby power consumption, which is critical in energy-efficient data centers. Compared to hot-swap controllers, the STPM801 offers a simpler, more cost-effective solution for moderate current applications.
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Battery-Powered Devices
The STPM801 is an excellent choice for battery-powered devices, such as portable electronics and IoT sensors. Its low quiescent current (50µA) extends battery life, while the wide input voltage range (2.7V to 5.5V) accommodates various battery chemistries, including Li-ion and alkaline. The programmable current limit allows designers to protect sensitive loads from overcurrent, and the under-voltage lockout prevents deep battery discharge. In a typical battery-powered application, the STPM801 is placed between the battery and the load, with the ILIM resistor set to the load's maximum current. The enable pin can be used to power down the load when not in use, further conserving battery. The thermal shutdown protects the device and battery from overheating. Compared to discrete load switches, the STPM801 integrates protection and control, simplifying design and improving reliability.
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Industrial Control Systems
The STPM801 is suitable for industrial control systems, where reliable power distribution and protection are essential. Its wide input voltage range (2.7V to 5.5V) covers common industrial logic levels, and the programmable current limit allows customization for different loads. The device's robust protection features, including thermal shutdown and under-voltage lockout, ensure safe operation in harsh environments. In a typical industrial control system, the STPM801 is used to switch power to sensors, actuators, and communication modules. The fault output can be connected to a PLC or microcontroller for diagnostics. The low on-resistance (70mΩ) minimizes power loss, improving system efficiency. Compared to relays, the STPM801 offers faster switching, longer lifespan, and no mechanical wear, making it ideal for high-cycle applications.
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Automotive Electronics
The STPM801 is designed for automotive electronics, such as body control modules and infotainment systems. Its input voltage range (2.7V to 5.5V) is compatible with automotive power rails, and the programmable current limit allows protection of various loads. The device's thermal shutdown and under-voltage lockout ensure reliable operation in the automotive environment, which experiences wide temperature variations and voltage transients. In a typical automotive application, the STPM801 is used to switch power to interior lighting, sensors, or USB charging ports. The fault output can be used to trigger a warning light or diagnostic code. The low quiescent current (50µA) is beneficial for always-on modules, reducing battery drain. Compared to fuses, the STPM801 provides resettable protection, reducing maintenance and improving user experience.
추천
IoT and Smart Home Devices
The STPM801 is ideal for IoT and smart home devices, such as smart plugs, sensors, and hubs. Its low quiescent current (50µA) is crucial for battery-powered IoT devices, and the programmable current limit allows protection of various loads. The device's small SOT-23-5 package is perfect for space-constrained designs. In a typical IoT device, the STPM801 is used to switch power to sensors, radios, or actuators. The enable pin can be controlled by a microcontroller to implement power-saving modes. The fault output can be used to detect overcurrent events, enabling remote diagnostics. The wide input voltage range (2.7V to 5.5V) accommodates different power sources, including batteries and USB. Compared to discrete load switches, the STPM801 integrates protection and control, reducing component count and improving reliability.
추천
추천 제품 요약
엔지니어링 참조 데이터: STPM801 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | STPM802 | TPS2041 | MIC2005 |
|---|---|---|---|---|
| Package | SOT-23-5 | SOT-23-5 | SOT-23-5 | SOT-23-5 |
| Brand | STMicroelectronics | STMicroelectronics | Texas Instruments | Microchip Technology |
| Input Voltage Range | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| Maximum Continuous Current | 1.5A | 1A | 0.5A | 0.5A |
| Current Limit Type | Programmable (100mA to 1.5A) | Fixed 1A | Fixed 500mA | Fixed 500mA |
| On-Resistance | 70mΩ | 70mΩ | 80mΩ | 85mΩ |
| Quiescent Current | 50µA | 50µA | 60µA | 55µA |
| Thermal Shutdown | 150°C | 150°C | 160°C | 150°C |
주요 차별점
- Programmable current limit from 100mA to 1.5A (vs TPS2041)
- Lower on-resistance (70mΩ) (vs TPS2041)
- Higher maximum continuous current (1.5A) (vs MIC2005)
설계 노트
Place the current-limit set resistor (R_ILIM) as close to the ILIM pin as possible to minimize parasitic inductance and noise. Use a 1% tolerance resistor for accurate current limiting. The input and output capacitors (typically 1µF to 10µF) should be placed near the IN and OUT pins to ensure stable operation and reduce voltage transients.
At maximum current (1.5A) and a voltage drop of 0.1V (70mΩ * 1.5A), the power dissipation is 0.15W. The SOT-23-5 package has a thermal resistance of approximately 250°C/W, resulting in a temperature rise of 37.5°C. Ensure adequate copper area on the PCB to dissipate heat, especially in high-temperature environments.
Do not exceed the maximum input voltage of 5.5V, as this can damage the device. Ensure the enable pin is not left floating; tie it to VIN or a logic high to enable the switch. The fault output is open-drain, so a pull-up resistor is required. Verify the current limit resistor value against the datasheet formula to avoid setting the limit too high, which could damage the load.
규정 준수 정보
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified. Halogen-free status not specified in available data.
