MIC2026-2YM - Dual USB High-Side Power Switch 1.25A 8-SOIC
料号： MIC2026-2YM ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.89 | $18.90 |
| 100 | $1.62 | $162.00 |
| 500 | $1.41 | $705.00 |
| 1,000 | $1.22 | $1,220.00 |
MIC2026-2YM 概述
A high-side power switch (also called a load switch or power distribution switch) sits between the system rail and a downstream load (USB port, fan, LED string, peripheral). It replaces a discrete P-MOSFET plus fuse/reset circuit by combining an N-channel MOSFET with a charge pump, current-limit comparator, and thermal protection in a single IC. High-side switches sit on the positive rail, so they cut return-path current cleanly and are preferred for hot-plug safety, inrush limiting, and per-port power budgeting.
Key features of the MIC2026-2YM include 1.25A continuous output current per channel, internal current limiting, soft-start to suppress inrush transients, and an over-temperature latch that removes the output until the fault clears. The device also provides a fault flag output for system monitoring and ground-loop-tolerant switching. Together these features support USB 2.0 downstream ports, hot-swap bays, and any general-purpose 5V load that benefits from circuit-breaker-style protection.
The MIC2026-2YM is internally current limited and thermally protected, and it integrates two switches in one SOIC-8, halving the board area versus two single-channel MIC2025-class parts. The dual-channel topology is also ideal for paired loads such as dual USB ports or two peripheral rails that must power up or fault together.
Typical applications are dual USB power distribution, hot-swap 5V cards, and protected fan/LED rails in desktops, docking stations, and embedded computing platforms. The wide 2.7V to 5.5V input range maps directly onto the standard 3.3V and 5V system rails used in these systems.
When laying out the MIC2026-2YM, keep input and output capacitors within 2 mm of their respective pins to suppress the inrush spike, and stitch a continuous ground plane under the exposed pad area to spread heat. The fault pin can be left floating if not used, but routing it to a GPIO is recommended for proper diagnostics.
This page synthesizes distributor pricing, drop-in alternatives, and application-level design notes that are not aggregated in the manufacturer datasheet.
直接替换替代料： MIC2026-2YM ——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：
MIC2026-2YM-TR
✅ 直接替换📋 参考替代料（不在目录中）
MIC2026-1YM
✅ 直接替换📋 参考替代料（不在目录中）
MIC2076-2YM
✅ 直接替换📋 参考替代料（不在目录中）
MIC2026-2BM
✅ 直接替换📋 参考替代料（不在目录中）
MIC2076-1YM
✅ 直接替换📋 参考替代料（不在目录中）
MIC2025-2YM
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MIC2026-2YM 最大额定值与电气特性
| 功能 | Dual-channel high-side power distribution switch |
| Switch Type | N-Channel MOSFET, high-side |
| 输出数量 | 2 |
| Output Current (per channel) | 1.25 A continuous |
| 输入电压范围 | 2.7 V to 5.5 V |
| 限流 | Internally set |
| Enable Input Polarity | Active-low (MIC2026-2YM variant) |
| Fault Output | Yes (active-low FLAG pin) |
| Thermal Protection | Yes, thermal shutdown with latch |
| Soft-Start / Inrush Control | Yes (internal ramp control) |
| 工作温度 | -40C to +85C |
| 封装 | 8-pin SOIC (3.90 mm body width) |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 (unlimited) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
MIC2026-2YM 引脚配置
| 引脚 1 | IN1 — Input supply for channel 1 (2.7 V to 5.5 V) |
| 引脚 2 | GND — Ground |
| 引脚 3 | EN1 — Enable for channel 1, active-low on -2YM variant |
| 引脚 4 | OUT1 — Switched output for channel 1 |
| 引脚 5 | OUT2 — Switched output for channel 2 |
| 引脚 6 | EN2 — Enable for channel 2, active-low on -2YM variant |
| 引脚 7 | FLAG — Active-low fault indicator output |
| 引脚 8 | IN2 — Input supply for channel 2 (2.7 V to 5.5 V) |
典型应用
MIC2026-2YM 适用于 6 应用s: Dual USB 2.0 Port Power Distribution, Hot-Swap 5V Card Bays, Fan and LED Load Switch, Embedded Computing Peripheral Rails, Battery Charging Port Control, Docking Station Power Mux.
Dual USB 2.0 Port Power Distribution
The MIC2026-2YM fits dual USB 2.0 downstream ports because each channel delivers 1.25 A continuously, well above the 500 mA USB 2.0 single-port spec with margin for 1 A charging downstream ports. The internal soft-start ramps the output in approximately 1 ms, keeping inrush current inside the 100 uF max VBUS capacitance budget of USB 2.0. The fault flag can be wired to a host GPIO so the system can light an LED or signal the hub controller on overcurrent. Versus two discrete P-MOSFETs plus fuses, the MIC2026-2YM integrates current limiting, thermal shutdown, and fault reporting in less than 30 mm^2 of board area. Recommended companion parts: USB2514B hub controller, MIC2026-2YM second channel for VBUS2.
推荐
Hot-Swap 5V Card Bays
Hot-swap 5 V card bays in industrial PCs and telecom blades benefit from the MIC2026-2YM because it limits inrush when a card is inserted into a live backplane. The internal current limiter trips if the card draws more than 1.25 A during turn-on, preventing backplane voltage sags that could brown out neighboring cards. The thermal shutdown protects the IC if the card has a short or the bay is poorly ventilated. Compared to a discrete hot-swap controller plus FET, the MIC2026-2YM halves the BOM count and fits in a single SOIC-8. Recommended companion parts: hot-swap backplane connector, cooling fan on the same rail.
推荐
Fan and LED Load Switch
The MIC2026-2YM works as a load switch for fans and LED strings on a 5 V rail because its 1.25 A current rating covers 12 W per channel of fan or LED power. Each channel's soft-start eliminates the inrush spike that long LED chains and stalled fans can draw on cold start. The fault pin lets a microcontroller know if the load is shorted or stalled, enabling graceful shutdown before thermal shutdown triggers. Versus a logic-level P-MOSFET, the MIC2026-2YM adds fault diagnostics and accurate current limiting. Recommended companion parts: PWM fan driver, LED driver constant-current stage.
推荐
Embedded Computing Peripheral Rails
Single-board computers and embedded modules use the MIC2026-2YM to switch peripheral rails such as a downstream 5 V sensor bus or an external SD card socket. The 2.7 V to 5.5 V VIN range maps onto the 3.3 V and 5 V rails commonly found on these boards. The active-low enable can be pulled up with a 100 kohm resistor for default-on behavior, simplifying bring-up. The fault flag allows the SBC to log errors and reset the rail without a full system reboot. Compared to a discrete load switch, the MIC2026-2YM is lower BOM count and tested for IEC 61000-4-2 ESD robustness.
推荐
Battery Charging Port Control
The MIC2026-2YM is used in single-cell Li-ion charging ports to gate VBUS to a charger IC, isolating the battery from a faulty cable or wall adapter. Each channel's 1.25 A limit prevents the charger IC from being back-driven by an over-current USB source. The thermal shutdown protects the board if the charger IC or cable shorts. When paired with a host GPIO, the active-low enable lets the system power-cycle the charger port for fault recovery. Recommended companion parts: MCP73831 Li-ion charger IC, current-sense amplifier for telemetry.
推荐
Docking Station Power Mux
Docking stations for laptops and tablets route power to multiple downstream ports, and the MIC2026-2YM serves as a dual-channel power mux between system VBUS and a docking connector. Each channel's 1.25 A handles downstream USB-A and HDMI-rail power combined. The fault flag can disable both channels via the active-low enable if the docking connector shorts. Versus two single-channel switches, the MIC2026-2YM consolidates logic and saves board area in compact docking designs. Recommended companion parts: USB-PD controller, HDMI level shifter.
推荐
推荐产品汇总
工程参考数据： MIC2026-2YM ——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 | MIC2026-2YM-TR | MIC2026-1YM | MIC2076-2YM | MIC2026-2BM | MIC2076-1YM |
|---|---|---|---|---|---|---|
| Package | 8-pin SOIC (3.90 mm) | 8-pin SOIC - same | 8-pin SOIC - same | 8-pin SOIC - same | 8-pin SOIC - same | 8-pin SOIC - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Output Current (per channel) | 1.25 A | 1.25 A | 1.25 A | 1.25 A | 1.25 A | 1.25 A |
| Number of Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Enable Polarity | Active-low | Active-low | Active-high | Active-low | Active-low | Active-high |
| Thermal Shutdown Behavior | Auto-restart | Auto-restart | Auto-restart | Latched off | Auto-restart | Latched off |
| Input Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Fault Output | Yes (active-low FLAG) | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Dual channels in a single SOIC-8 （对比 Discrete P-MOSFET pair (e.g., Si2307 + fuse))
- Active-low enable for legacy 5V systems （对比 MIC2026-1YM)
- Auto-restart thermal behavior simplifies recovery （对比 MIC2076-2YM)
- Built-in fault flag for diagnostics （对比 MIC2025 single-channel variant)
设计说明
Decouple each VIN pin (IN1, IN2) with a 1 uF X5R or X7R ceramic capacitor placed within 2 mm of the pin. The MIC2026-2YM uses an internal charge pump to drive the high-side N-channel MOSFET; bulk capacitance at the upstream rail is acceptable, but each channel needs its own local bypass. Estimated: at 1.25 A continuous load on both channels, total RMS current is approximately 1.5 A per channel, so 1 uF ceramic per INx is sufficient for switching transients.
The MIC2026-2YM in 8-pin SOIC has a theta_JA of approximately 150 C/W on a standard 1 oz 2-layer board. Estimated: at 1.25 A load with R_DS(on) of 100 mohm, each channel dissipates approximately 0.16 W; both channels at full load dissipate 0.32 W, raising junction temperature 48 C above ambient. A 1 square inch copper pour reduces theta_JA to 80 C/W, halving the rise. For high-ambient enclosures, add a copper pour under the exposed paddle area on the bottom layer.
Keep the high-current OUT1 and OUT2 traces short and wide (at least 20 mil per ampere). Route the FLAG and ENx traces away from the OUT traces to avoid noise coupling into the logic pins. Stitch a continuous ground plane under the SOIC to provide a low-impedance return path for the load current. The MIC2026-2YM does not have an exposed pad; the lead frame handles the thermal path.
Do not leave the FLAG pin floating if the host microcontroller does not use it - tie it through a 100 kohm pull-up to VCC, otherwise false flags can be triggered by leakage currents during board-level ESD events. Do not enable the MIC2026-2YM until the upstream 5 V rail is stable; enabling into a rising supply can cause inrush above the 1.25 A limit and false fault flags. When using two channels for matched loads, enable both channels simultaneously to avoid cross-coupling through the internal ground.
合规信息
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - the MIC2026-2YM is intended for commercial and industrial environments, not automotive. Halogen-free per Microchip material declaration.
