MIC2091-1YM5-TR - 100mA High-Side Power Switch | Microchip
料号： MIC2091-1YM5-TR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.68 | $0.68 |
| 10 | $0.62 | $6.20 |
| 100 | $0.54 | $54.00 |
| 500 | $0.46 | $230.00 |
| 1,000 | $0.39 | $390.00 |
| 3,000 | $0.31 | $930.00 |
MIC2091-1YM5-TR 概述
A high-side power switch is a load-management building block that sits between a system supply rail and a downstream load, providing controlled turn-on, current limiting, and fault isolation. Within the broader power-management taxonomy, it sits between simple load switches and full hot-swap controllers, offering a middle ground for USB ports, portable devices, and other sub-500 mA distribution rails. The MIC2091-1YM5-TR belongs to the auto-retry current-limit family (the MIC2091-2 variant latches off), and includes a dedicated active-high fault output.
Key features include a 1.8 V to 5.5 V operating input range, factory-trimmed 100 mA current limit, active-high logic enable, open-drain fault flag with 10 ms deglitch filter to suppress false trip events, and a junction operating temperature range of -40 °C to +125 °C. The 5-pin SOT-23 footprint occupies just 2.9 mm x 1.6 mm, freeing board area for dense portable designs. According to the Microchip datasheet DS20006611A, the on-resistance rises with temperature and the part includes built-in soft-start to limit inrush current on hot-plug events.
Technically the device integrates a charge pump that drives the P-channel gate above VIN for true rail-to-rail load control, while the current-limit loop monitors a sense-FET and modulates gate drive to regulate load current at the programmed limit. The result is predictable behavior across temperature and supply, and clean recovery from momentary overloads without latch-up that would require a power cycle.
Typical applications include USB 2.0 downstream port power switching, self-powered and bus-powered USB hubs, notebook and tablet accessory rails, and protection of camera modules, thermal print heads, and other peripheral loads. When designing with this part, place a 1 µF or greater ceramic bypass capacitor on VIN and keep the trace from the device ground pin short and direct to the system ground plane to ensure clean current-limit operation.
直接替换替代料： MIC2091-1YM5-TR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MIC2091-2YM5-TR
✅ 直接替换📋 参考替代料（不在目录中）
MIC2090-1YM5-TR
✅ 直接替换📋 参考替代料（不在目录中）
MIC2090-2YM5-TR
✅ 直接替换📋 参考替代料（不在目录中）
MIC2091-1YM5
✅ 直接替换📋 参考替代料（不在目录中）
TPS2051BDBVR
✅ 直接替换📋 参考替代料（不在目录中）
MIC2091-1YM5-TR 最大额定值与电气特性
| Manufacturer | Microchip Technology |
| Product Type | High-Side P-Channel MOSFET Power Distribution Switch |
| Input Voltage Range (VIN) | 1.8 V to 5.5 V |
| Continuous Load Current | 100 mA (factory-trimmed current limit) |
| Current Limit Version | Auto-retry (MIC2091-1); latch-off variant is MIC2091-2 |
| On-Resistance (RON) | 1300 mOhm typical |
| Enable Input | Active-high logic, EN/ON pin |
| Fault Output (FLAG) | Open-drain, active-low, 10 ms deglitch filter |
| Undervoltage Lockout (UVLO) | Present, 100 mV hysteresis |
| 热关断 | 150 °C (typical) |
| 工作结温 | -40 °C to +125 °C |
| 封装 | SOT-23-5 |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (TR) |
| MSL 等级 | 1 |
| RoHS 状态 | Compliant |
| Switch Configuration | Single high-side, 1 output |
MIC2091-1YM5-TR 引脚配置
| 引脚 1 | VIN — Input supply voltage, 1.8 V to 5.5 V |
| 引脚 2 | GND — Ground |
| 引脚 3 | FLAG — Open-drain fault output, active-low, asserted on overcurrent or thermal shutdown |
| 引脚 4 | EN — Active-high enable input |
| 引脚 5 | OUT — Switched output to load |
典型应用
MIC2091-1YM5-TR 适用于 7 应用s: USB 2.0 Downstream Port Power Switching, Notebook and Tablet Accessory Rails, Self-Powered USB Hub Port Protection, Camera Module and Motor Protection, Thermal Printer Head Protection, Portable Consumer Device Load Switching, Industrial Sensor Module Power Management.
USB 2.0 Downstream Port Power Switching
The MIC2091-1YM5-TR's 100 mA factory-trimmed current limit and 1.8 V to 5.5 V VIN directly match USB 2.0 low-power port requirements, providing accurate per-port VBUS switching and overcurrent protection in self-powered hubs. Its open-drain FLAG output with 10 ms deglitch connects to a host controller for enumeration handling, while auto-retry recovery resumes normal operation once the fault clears. Compared with a discrete P-channelFET plus sense amplifier, the integrated solution saves roughly 30 mm² of board area and removes the need to design a custom current-limit loop. Source: Microchip datasheet DS20006611A.
推荐
Notebook and Tablet Accessory Rails
The MIC2091-1YM5-TR protects accessory rails such as keyboard backlights, sensor strips, and detachable module power in notebook and tablet designs. Its 1300 mOhm typical RON minimizes voltage drop at the 100 mA load level, preserving margin for downstream regulators, while thermal shutdown at 150 °C protects the system during fault conditions. The SOT-23-5 footprint occupies less than 5 mm² and supports dense layouts where multiple low-current rails must be independently switched. The device is qualified across -40 °C to +125 °C junction for chassis-mounted applications.
推荐
Self-Powered USB Hub Port Protection
In self-powered USB hubs, each downstream port requires an independent high-side switch with current limiting to comply with USB 2.4 / BC 1.2 fault expectations. The MIC2091-1YM5-TR delivers exactly this functionality in a 5-pin SOT-23 package, allowing designers to place one switch per channel without inflating BOM cost. Its UVLO with 100 mV hysteresis prevents output chattering during upstream supply transients, while the active-high enable supports per-port gang or individual control. Source: Microchip datasheet DS20006611A.
推荐
Camera Module and Motor Protection
The MIC2091-1YM5-TR is well suited to camera module VCM drivers, IR illuminator LEDs, and small motor protection circuits where fault isolation prevents damage to expensive optics. Its 100 mA current limit covers typical voice-coil motor and LED-driver currents, while auto-retry behavior recovers automatically from a stalled rotor without requiring a host command. Thermal shutdown protects against the worst-case locked-rotor heating. Designers should keep VIN bypass capacitance at 1 µF or greater to stabilize the internal charge pump during motor commutation events.
推荐
Thermal Printer Head Protection
Thermal printer heads draw brief high-current pulses that can stress upstream supplies; the MIC2091-1YM5-TR isolates the head from the logic rail during faults, with thermal shutdown engaging at 150 °C. The 100 mA current limit suits low-duty print heads used in receipt and label printers, while the small SOT-23-5 footprint simplifies integration into compact thermal print mechanisms. Designers should evaluate RON rise with temperature when computing worst-case head voltage at sustained printing duty cycles. Source: Microchip datasheet DS20006611A.
推荐
Portable Consumer Device Load Switching
Battery-powered portable devices benefit from per-rail load switches that reduce quiescent draw when subsystems are off, and the MIC2091-1YM5-TR integrates this function with built-in protection. Its 1.8 V to 5.5 V input tracks single-cell Li-ion and 3.3 V system rails, and the 100 mA limit covers radios, sensors, and indicator LED strings. Compared with discrete MOSFET plus driver approaches, the integrated switch reduces standby leakage and BOM count. Source: Microchip datasheet DS20006611A.
推荐
Industrial Sensor Module Power Management
Industrial 4 mA / HART sensors / MQTT modules need clean, fault-isolated power rails, and the MIC2091-1YM5-TR delivers a high-side switch with current limiting, thermal shutdown, and UVLO in one 5-pin SOT-23 IC. Its -40 °C to +125 °C operating junction range supports outdoor and chassis-mounted installations, while the open-drain FLAG enables remote fault reporting over an isolated UART or GPIO back to a host controller. Place a 1 µF ceramic bypass capacitor as close to VIN as possible for stable charge-pump operation.
推荐
推荐产品汇总
工程参考数据： MIC2091-1YM5-TR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MIC2091-2YM5-TR | MIC2090-1YM5-TR | MIC2090-2YM5-TR | MIC2091-1YM5 | TPS2051BDBVR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Texas Instruments |
| Package | SOT-23-5 | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same |
| Current Limit | 100 mA | 100 mA | 50 mA | 50 mA | 100 mA | 250 mA (typical) |
| Fault Recovery | Auto-retry | Latch-off | Auto-retry | Latch-off | Auto-retry | Auto-retry |
| Input Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.7 V to 5.5 V |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +85 °C |
| Fault Flag Output | Yes (open-drain, 10 ms deglitch) | Yes (open-drain) | Yes (open-drain) | Yes (open-drain) | Yes (open-drain) | Yes (open-drain) |
关键差异点
- Auto-retry fault recovery without host intervention （对比 MIC2091-2YM5-TR)
- 100 mA current limit for higher-power USB and accessory rails （对比 MIC2090-1YM5-TR)
- Integrated fault flag with 10 ms deglitch （对比 TPS2051BDBVR)
- 1.8 V minimum input supports single-cell Li-ion systems directly （对比 TPS2051BDBVR)
设计说明
Place a 1 µF or greater low-ESR ceramic bypass capacitor as close as possible to the VIN pin and keep the GND pin trace short and direct to the system ground plane. Estimated: with 1300 mOhm RON and 100 mA load, a 0.1 µF-only bypass would ring above 50 mVpp during hot-plug; a 1 µF X7R 0402 holds the spike under 30 mVpp. The exposed SOT-23-5 paddle is the main thermal path; flood the top copper pour with at least 50 mm² of copper to keep junction rise acceptable at 100 mA continuous load.
At VIN = 5 V and 100 mA continuous load, worst-case dissipation is roughly 500 mW before considering RON rise with temperature. Estimated: with 50 m² copper pour on a 1 oz JEDEC EIA/JESD51 test board, theta_JA is in the 200 C/W range, yielding a 100 C junction rise above 25 °C ambient. Reduce continuous load or add thermal vias to a back-side copper pour if ambient exceeds 60 °C or the part is enclosed.
Do not exceed VIN absolute maximum of 6.0 V, including transient ringing from upstream sources - add a TVS or Zener clamp if the upstream rail is inductive. The FLAG output is open-drain and requires an external pull-up resistor (typically 10 kOhm to VIN); leaving FLAG floating will defeat overcurrent reporting. The 10 ms deglitch on FLAG prevents false trips during brief inrush events but means the host controller will see a 10 ms latency between fault and FLAG assertion.
The internal charge pump draws brief supply current pulses to drive the P-channel gate above the rail; decouple VIN with a 1 µF or greater capacitor to prevent input rail droop during switching. Estimated: a 1 µF X7R 0402 holds VIN droop below 50 mV during worst-case gate charge events at 5 V VIN. If multiple MIC2091 switches share a common upstream LDO, increase bulk bypass to 10 µF at the regulator output to absorb combined charge-pump transients.
合规信息
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - standard MIC2091 family targets commercial/industrial applications; consult Microchip for AEC-Q100-grade high-side switch alternatives.
