MIC2005A-2YM6-TR - 500mA High-Side USB Power Switch SOT-23-6 | Microchip
MPN： MIC2005A-2YM6-TR ✓ 啟用中MIC2005A-2YM6-TR 概覽
A USB high-side power switch is a type of load switch that sits between a system power rail (typically 5 V) and a downstream USB port or peripheral. Its role is to turn the rail on or off under logic control, present a defined upstream current to the host, and protect both the host and the device from over-current, short-circuit, and inrush events. The MIC20XX family sits within the broader power management IC hierarchy of load switches -> power distribution switches -> USB switches -> power management ICs, complementing LDOs and DC-DC converters on the power tree.
Key features include a fixed 500 mA current limit, a 2.5 V to 5.5 V input operating range, low quiescent current, integrated soft-start to control inrush current, an active-high enable input, fault-flag output for over-current and thermal events, under-voltage lockout, and thermal shutdown. Typical on-resistance is approximately 70 mΩ at 5 V, providing low dropout and minimal power dissipation in normal operation. The device requires no external MOSFET, sense resistor, or current-setting network.
The MIC2005A-2YM6-TR is the -2 active-high enable variant of the family and ships on tape-and-reel for high-volume assembly. Its small SOT-23-6 footprint, integrated protection, and minimal external BOM make it well suited to compact, cost-sensitive 5 V rails such as USB ports, HDMI ports, and downstream power connectors on consumer and computing platforms.
Typical applications include USB 2.0 downstream ports on PCs and laptops, HDMI link power switching, set-top boxes, printers, digital televisions, and any port that needs self-powered or bus-powered current limiting. Pair the MIC2005A-2YM6-TR with an upstream 5 V LDO or buck regulator and follow the datasheet bulk-capacitor guidance to remain USB 2.0 compliant under load steps.
When designing with this device, place the input and output bulk capacitors as close as possible to the IC and observe the datasheet derating curve for short-circuit and over-current behavior. Thermal layout is straightforward because typical load currents are 500 mA or less, but continuous fault conditions must be considered.
This page combines verified distributor pricing, drop-in alternatives from the same MIC20XX family and competing vendors, and practical PCB design notes not bundled in the manufacturer datasheet, giving a faster engineering decision path than scanning individual distributor listings.
直接替換替代品，適用於 MIC2005A-2YM6-TR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MIC2005A-2YM6-TR （相同外形與佔位） — 差異在於 Fault Flag Output, Function, Operating Temperature Range, Package, Thermal Shutdown.
MIC2009A-2YM6-TR
✅ 直接替換📋 參考替代品（不在目錄中）
MIC2019YM6-TR
✅ 直接替換📋 參考替代品（不在目錄中）
MIC2005A-1YM6-TR
✅ 直接替換聯絡詢價
查看資料表 →MIC2005-1.2YM6-TR
✅ 直接替換📋 參考替代品（不在目錄中）
MIC2005A-2YM6
✅ 直接替換📋 參考替代品（不在目錄中）
TPS2553DBVR
✅ 直接替換📋 參考替代品（不在目錄中）
MIC2005A-2YM6-TR 最大額定值與電氣特性
| 功能 | High-side P-channel MOSFET power distribution switch |
| 拓撲 | 1:1 P-Channel load switch |
| 輸入電壓範圍 | 2.5 V to 5.5 V |
| Output Current (Continuous) | 500 mA |
| Fixed Current Limit | 500 mA (typical) |
| On-Resistance (RON) | 70 mΩ typical at 5 V |
| Enable Polarity | Active-high (logic level) |
| Fault Flag Output | Yes, active-low /FLAG for over-current and thermal events |
| Under-Voltage Lockout | Yes (integrated) |
| 過熱關機 | Yes (integrated) |
| Soft-Start / Slew-Rate Control | Yes (integrated, inrush limiting) |
| 工作溫度範圍 | -40 °C to +85 °C |
| 封裝 | SOT-23-6 (6-pin) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 1 |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
| Packaging | Tape & Reel (TR) |
| Switch Family | MIC20XX current-limited high-side switch family |
MIC2005A-2YM6-TR 腳位配置
| 腳位 1 | EN — Active-high enable input; logic high turns the switch on |
| 腳位 2 | VIN — Input supply voltage (2.5 V to 5.5 V); connect bulk capacitor here |
| 腳位 3 | GND — Ground reference for the IC |
| 腳位 4 | /FAULT — Active-low open-drain fault flag; asserted on over-current or thermal shutdown |
| 腳位 5 | VOUT — Switched output to the load; connect bulk capacitor here |
| 腳位 6 | NC — Not connected internally (per SOT-23-6 layout, reserved pad) |
典型應用
MIC2005A-2YM6-TR 適用於 6 應用s: USB 2.0 Downstream Port Power Switch, HDMI Port Link Power Switching, Set-Top Box / DTV USB Port Power, Printer and Peripheral USB Power, Tablet and Accessory 5 V Load Switch, Industrial Sensor / Modem Power Distribution.
USB 2.0 Downstream Port Power Switch
The MIC2005A-2YM6-TR's 500 mA fixed current limit directly matches the USB 2.0 high-power downstream port budget, while its integrated soft-start controls inrush when hot-plug events occur. The internal P-channel MOSFET RON of ~70 mΩ keeps the 5 V rail drop below ~35 mV at full load, preserving USB voltage tolerance at the connector. Designers use the /FAULT pin to notify the host controller of over-current events, enabling port-power management on PCs, laptops, and docking stations where per-port current limiting is required by USB compliance.
推薦
HDMI Port Link Power Switching
HDMI link power (5 V) supplies the HDMI connector and downstream receiver; the MIC2005A-2YM6-TR's 2.5-5.5 V range, 500 mA limit, and 70 mΩ RON suit this rail cleanly. The active-high enable pin allows the graphics controller to power-down the HDMI port in low-power states, while the integrated fault flag reports cable or sink faults back to the GPU. Placing a bulk capacitor near the switch output per the MIC20XX datasheet limits inrush into the HDMI sink and meets HDMI compliance load-step behavior.
推薦
Set-Top Box / DTV USB Port Power
In set-top boxes and digital televisions, the MIC2005A-2YM6-TR provides a single-IC solution for self-powered USB ports that must deliver up to 500 mA per the USB 2.0 specification. The 6-pin SOT-23-6 footprint is well suited to compact STB/DTV mainboards, and the integrated thermal shutdown protects against output short-to-VBUS faults. The /FAULT output can drive an LED or a GPIO on the main SoC for user diagnostics, simplifying the BOM compared with a discrete MOSFET + op-amp current-sense circuit.
推薦
Printer and Peripheral USB Power
Printers and office peripherals use the MIC2005A-2YM6-TR to switch the upstream-facing USB port that connects to a host PC. The 500 mA fixed current limit prevents back-fed faults from damaging the host if the printer cable shorts, and the integrated soft-start avoids nuisance trips when large output bulk capacitors on the printer's internal rail are charged. With a 5.5 V maximum input, the switch operates safely from any USB-compliant 5 V VBUS rail even with cable IR-drop included.
推薦
Tablet and Accessory 5 V Load Switch
Tablets, accessories, and battery-powered products use the MIC2005A-2YM6-TR as a low-loss load switch between a 3.7-4.2 V Li-ion rail or 5 V boost rail and downstream peripherals. The 70 mΩ RON limits conduction loss to ~35 mW at 500 mA, extending battery life, and the active-high enable ties cleanly to a GPIO. The /FAULT output alerts the system PMIC when downstream current exceeds the USB or accessory budget, enabling graceful power-down.
推薦
Industrial Sensor / Modem Power Distribution
Industrial sensor gateways and cellular modems use the MIC2005A-2YM6-TR to switch a 5 V rail feeding the modem or sensor stack. The 2.5-5.5 V range accepts both 3.3 V and 5 V rails, and the integrated under-voltage lockout prevents operation when the rail sags during input brownouts. The /FAULT output can be wired to the host MCU to trigger a controlled modem reset on persistent over-current, while thermal shutdown protects the system against output wiring faults in the field.
推薦
推薦產品摘要
工程參考資料，適用於 MIC2005A-2YM6-TR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MIC2009A-2YM6-TR | MIC2019YM6-TR | MIC2005A-1YM6-TR | MIC2005-1.2YM6-TR | TPS2553DBVR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Texas Instruments |
| Package | SOT-23-6 | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 (DBV) - same |
| Current Limit | 500 mA fixed | 900 mA fixed | Adjustable (via external resistor) | 500 mA fixed | 500 mA fixed | Adjustable up to 1.5 A |
| Enable Polarity | Active-high (EN) | Active-high | Active-high | Active-LOW | Active-high | Active-high |
| On-Resistance (5 V) | 70 mΩ typical | 70 mΩ typical | 70 mΩ typical | 70 mΩ typical | 70 mΩ typical | ~100 mΩ typical |
| Input Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 6.5 V |
| Fault Flag | Yes (active-low) | Yes (active-low) | Yes (active-low) | Yes (active-low) | Yes (active-low) | Yes (active-low) |
| Thermal Shutdown | Yes (integrated) | Yes | Yes | Yes | Yes | Yes |
| Approx. Unit Price (qty 1) | $0.86 | ~$0.95 | ~$1.00 | ~$0.86 | ~$0.90 | ~$1.05 |
主要差異化特點
- Single-IC integrated 500 mA current limit and fault flag (對比Discrete P-MOSFET + sense resistor + op-amp current-sense circuit)
- Drop-in upgrade path within MIC20XX family (對比MIC2009A-2YM6-TR (900 mA))
- 70 mΩ typical RON in SOT-23-6 (對比TPS2553DBVR (~100 mΩ))
設計說明
Place the VIN and VOUT bulk capacitors as close as possible to the MIC2005A-2YM6-TR pins. Per the MIC20XX family datasheet, a 1 uF ceramic on VIN and a 1 uF to 22 uF bulk on VOUT are typical. Short, wide traces from VOUT to the load reduce voltage drop during high di/dt load steps on USB VBUS. Keep the /FAULT pull-up resistor close to the IC to avoid false trips from leakage.
Estimated: at VIN=5 V, VOUT=5 V, and 500 mA continuous load, the IC dissipates approximately P = I² * RON = 0.5² * 0.07 = 17.5 mW, which is negligible in the SOT-23-6 footprint. Under fault conditions in current-limit, however, dissipation can rise sharply (P_fault ≈ (VIN - VOUT_fault) * ILIMIT); thermal shutdown will engage. Ensure the layout copper area keeps θJA low enough to ride out transient faults.
Do not exceed 5.5 V on VIN: the MIC2005A-2YM6-TR is rated for USB VBUS and 5 V rails only, not 12 V. Do not leave VOUT floating when EN is asserted; an unloaded VOUT can ring and falsely assert /FAULT. For active-low enable systems, use the MIC2005A-1YM6-TR instead - swapping polarity at the board level is a common bring-up bug. Always populate a bulk cap on VOUT per the datasheet to avoid inrush-induced false trips.
合規資訊
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - not intended for automotive. Operating temperature -40 °C to +85 °C is industrial/commercial grade.
