MIC2005A-1YM5-TR - 500mA High-Side Power Switch SOT-23-5 | Microchip
MPN: MIC2005A-1YM5-TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.78 | $0.78 |
| 10 | $0.7 | $7.00 |
| 100 | $0.55 | $55.00 |
| 500 | $0.46 | $230.00 |
| 1,000 | $0.41 | $410.00 |
| 3,000 | $0.37 | $1,110.00 |
MIC2005A-1YM5-TR Overview
A high-side power switch (also called a USB power switch or load switch) is a MOSFET-based circuit that sits between the upstream DC rail and the downstream load. Its job is to distribute power, protect the load and the wiring from over-current events, and provide a clean, controlled turn-on. The high-side switch sits between the supply and the load (versus a low-side switch which sits between load and ground), preserving the ground reference of the downstream circuit. In the power management hierarchy, high-side switches fall under power distribution ICs, which themselves sit under power management ICs and the broader semiconductor category.
Key features of the MIC2005A-1YM5-TR include thermal-shutdown protection, under-voltage lockout (UVLO), output slew-rate limiting, an active-high enable input for sequencing or push-button control, and a fixed (non-adjustable) current-limit threshold of 500 mA. The part is offered in tape-and-reel packaging (-TR suffix) for high-volume assembly and is qualified over the -40 °C to +85 °C industrial temperature range. Because the current limit is fixed, no external sense resistor is required - this simplifies BOM and reduces PCB area.
The internal architecture combines a P-channel power MOSFET, a precision current-sense and comparator block, a charge-pump driver for the MOSFET gate, and digital control logic for the enable, fault, and blanking functions. The 70 mΩ on-resistance at 5 V keeps conduction losses low - even at 500 mA, the drop across the switch is only about 35 mV. Fault blanking prevents nuisance tripping during capacitive-load inrush or USB hot-plug events, while thermal shutdown protects the die if sustained overload drives the junction temperature above the safe limit.
Typical applications include USB port power switching in hubs, set-top boxes, and printers; high-side load switching in digital televisions (DTV), personal digital assistants (PDAs), and other peripherals; and any system that needs a single 5 V rail switch with built-in current limit and fault reporting. The MIC20XX family is also commonly used to power individual downstream rails in multi-rail systems where each rail needs independent protection. Compared to discrete MOSFET + comparator solutions, the MIC2005A-1YM5-TR saves board space and design time by integrating the FET, sense element, and protection logic in one 5-pin SOT-23.
When designing with this part, pay attention to the input capacitor - Microchip recommends a 1 µF low-ESR ceramic directly on IN to handle load-step transients and stabilize the internal charge pump. The /FAULT pin requires a pull-up resistor (typically 10 kΩ to 100 kΩ) because it is an open-drain output. Layout should keep the high-current OUT trace short and wide to minimize parasitic inductance.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet. For full electrical characteristics and curves, refer to the official Microchip MIC20XX datasheet.
Drop-in alternatives for MIC2005A-1YM5-TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MIC2014-0.5YM5
✅ Drop-In📋 Reference alternative (not in catalog)
MIC2014-0.5YM5-TR
✅ Drop-In📋 Reference alternative (not in catalog)
MIC2005A-1YM5-TR Maximum Ratings & Electrical Characteristics
| Function | High-side P-channel MOSFET power distribution switch |
| Number of Channels | 1 |
| Switch Type | P-Channel (high-side) |
| Input Voltage Range (VIN) | 2.5 V to 5.5 V |
| Maximum Continuous Load Current | 500 mA |
| On-Resistance (RON) | 70 mΩ typical at 5 V |
| Current Limit | 500 mA fixed (factory-trimmed) |
| Current Limit Type | Fixed (non-adjustable) |
| Enable Input | Active-high EN |
| Fault Output | /FAULT, open-drain, asserts low ~32 ms after sustained over-current |
| Fault Blanking Time | 32 ms typical |
| Under-Voltage Lockout | Yes |
| Thermal Shutdown | Yes |
| Output Slew-Rate Limiting | Yes |
| Operating Temperature Range | -40 °C to +85 °C (industrial) |
| Package | SOT-23-5 |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR) |
| RoHS Status | Compliant |
MIC2005A-1YM5-TR Pin Configuration
| Pin 1 | EN — Active-high enable input; drive high to turn on the switch, low to float output |
| Pin 2 | GND — Ground reference for IN, OUT, EN, and /FAULT |
| Pin 3 | OUT — Switched output to the load (500 mA continuous max) |
| Pin 4 | /FAULT — Open-drain fault output; asserts low ~32 ms after sustained over-current or thermal shutdown |
| Pin 5 | IN — Input supply voltage, 2.5 V to 5.5 V; decouple with 1 µF ceramic |
Typical Applications
MIC2005A-1YM5-TR is suitable for 6 applications: USB 2.0 Downstream Port Power Switching, Set-Top Box / DTV Peripheral Power Rail Switching, Printer and Office Equipment Load Switching, Single-Cell Li-Ion / USB-Powered Portable Devices, Hot-Swap / Plug-and-Play Card Power Control, Industrial Control and Embedded Computing Peripherals.
USB 2.0 Downstream Port Power Switching
The MIC2005A-1YM5-TR is well suited for USB 2.0 downstream port power switching because its 500 mA fixed current limit matches the USB 2.0 standard's 5 V / 500 mA downstream port requirement exactly. The 70 mΩ on-resistance keeps voltage drop across the switch below 35 mV at full load, leaving the downstream device with nearly the full 5 V supply even at 500 mA. The 32 ms fault blanking window prevents nuisance tripping during USB hot-plug inrush or capacitive-load charging transients. Place a 1 µF low-ESR ceramic on IN and a 22 µF bulk cap on OUT to absorb load steps. The open-drain /FAULT pin can drive a host interrupt or status LED through a 10 kΩ pull-up, giving the system visibility into port-level fault conditions. This switch saves significant board area versus discrete MOSFET-plus-comparator implementations.
Recommended
Set-Top Box / DTV Peripheral Power Rail Switching
Set-top boxes and digital televisions (DTVs) need to individually switch downstream peripheral rails (HDMI, USB, tuner, front-panel) on and off without disturbing the main supply. The MIC2005A-1YM5-TR provides exactly this function with a single high-side switch in a tiny SOT-23-5 footprint - ideal for the densely-populated PCBs typical of consumer A/V equipment. The 2.5 V to 5.5 V input range covers both 3.3 V and 5 V rails commonly used in these designs. The active-high enable input allows direct connection to a GPIO for sequenced power-up, while the /FAULT output can interrupt the host MCU if a downstream short is detected. Compared to discrete solutions, the integrated thermal shutdown and UVLO remove the need for external protection circuitry.
Recommended
Printer and Office Equipment Load Switching
Printers and office equipment use individual high-side switches to control fuser heaters, motors, solenoids, and downstream logic rails. The MIC2005A-1YM5-TR's 500 mA current limit and 5 V operating range make it ideal for switching 5 V logic and low-power peripheral rails in these designs. The integrated thermal shutdown protects the IC if a downstream motor stall or wiring fault causes sustained over-current. Output slew-rate limiting reduces inrush on capacitive loads, lowering EMI on the main 5 V rail - an important consideration in EMC-tested office equipment. The SOT-23-5 package allows placement close to the load, minimizing high-current trace length. The /FAULT pin can be wired to the printer controller's interrupt to trigger user-visible error messages.
Recommended
Single-Cell Li-Ion / USB-Powered Portable Devices
Portable, battery-powered products frequently need a load switch between the USB charger input (or a buck-boost output) and downstream subsystems such as sensors, radios, or displays. The MIC2005A-1YM5-TR operates down to 2.5 V input, so it can be used directly from a single Li-Ion cell (3.0 V to 4.2 V) without an upstream regulator. The 70 mΩ on-resistance minimizes conduction loss - critical for battery life - dropping only 35 mV at 500 mA. The active-high EN allows the host MCU to power down subsystems during sleep, extending standby time. The SOT-23-5 package fits in space-constrained wearables and IoT sensor modules. Note that for sub-2.5 V rails a different MIC20XX variant or external level shifter would be needed.
Recommended
Hot-Swap / Plug-and-Play Card Power Control
Systems that accept plug-in cards, modules, or docking accessories need a controlled power-up sequence and fault isolation. The MIC2005A-1YM5-TR provides controlled turn-on with built-in slew-rate limiting to prevent backplane glitches when a card is inserted live. The 500 mA current limit protects the backplane connector and upstream rail from card faults. The /FAULT output asserts after 32 ms of sustained over-current, allowing inrush transients to settle before declaring a fault. The part's UVLO function ensures the output stays off if the upstream rail collapses, preventing inrush into a drooping supply. This makes it well suited for industrial plug-in modules, point-of-sale peripherals, and modular test equipment.
Recommended
Industrial Control and Embedded Computing Peripherals
Industrial controllers and embedded computing platforms (SBCs, SOMs, edge gateways) use high-side switches to individually enable downstream RS-485 transceivers, sensor interfaces, indicator LEDs, and auxiliary subsystems. The MIC2005A-1YM5-TR's industrial -40 °C to +85 °C temperature rating and 5 V tolerance suit harsh-environment deployments. The 500 mA fixed limit is appropriate for powering low-current peripherals without risk of overload. The integrated protection features (UVLO, thermal shutdown, fault blanking) reduce system-level failure modes and simplify regulatory compliance. The /FAULT pin can feed directly into an MCU interrupt or PLC digital input for centralized fault monitoring. The small SOT-23-5 footprint allows placement at the point-of-load, keeping high-current traces short.
Recommended
Recommended Products Summary
Engineering reference data for MIC2005A-1YM5-TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MIC2014-0.5YM5 | MIC2014-0.5YM5-TR | MIC2005A-1YM6-TR | MIC2005M-0.5YM6-TR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOT-23-5 | SOT-23-5 (drop-in same) | SOT-23-5 (drop-in same) | SOT-23-6 (cross-package) | SOT-23-6 (cross-package) |
| Load Current | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA |
| Current Limit Type | Fixed 500 mA | Fixed 500 mA | Fixed 500 mA | Fixed 500 mA | Fixed 500 mA |
| Enable Polarity | Active-high | Active-high | Active-high | Active-high | Active-high |
| Fault Output | /FAULT, open-drain, ~32 ms blanking | /FAULT, open-drain | /FAULT, open-drain | /FAULT, open-drain | /FAULT, open-drain |
| Thermal Shutdown | Yes | Yes | Yes | Yes | Yes |
| Generation | MIC2005A family (mature) | MIC2014 family (newer) | MIC2014 family (newer) | MIC2005A family 6-pin | MIC2005 family 6-pin |
Key Differentiators
- Integrated 500 mA fixed current limit eliminates external sense resistor (vs Discrete P-MOSFET + current-sense amplifier)
- 32 ms fault blanking prevents nuisance tripping during USB hot-plug (vs MIC2005 (non-A revision) and older MIC20XX parts)
- Drop-in compatibility with MIC2014-0.5YM5 enables lifetime buy flexibility (vs Vendor-specific competitors (TI TPS2051B, ON NCP380))
Design Notes
Place a 1 µF low-ESR ceramic capacitor as close as possible to the IN pin (pin 5) to stabilize the internal charge pump and absorb load-step transients. Add a 22 µF or larger bulk capacitor on OUT to handle inrush when a USB device is hot-plugged. Per Microchip's MIC20XX datasheet, inadequate input capacitance can cause the part to false-trigger UVLO or oscillate during fast load edges. Avoid using the MIC2005A-1YM5-TR above 500 mA continuous - the part does not current-limit above its rating, it just regulates to the limit, so thermal stress will rise with VIN-VOUT drop.
Estimated: at 500 mA load and 5 V input, the part dissipates P = I² × R = 0.5² × 0.07 = ~17.5 mW internally from RON alone. The SOT-23-5 has a typical θJA of ~200 °C/W on a 1-oz 2-layer board, so the junction rise above ambient is roughly 3.5 °C at full rated current. This is well within the 125 °C junction limit, but derate when VIN is above 5 V or when ambient exceeds 70 °C. If your design approaches the thermal limit, expand the copper area under the exposed tab (if any) or switch to the SOT-23-6 version with better thermal performance.
Route the OUT trace (pin 3) short and wide - this carries the full 500 mA load. Keep the GND trace (pin 2) short and direct to the system ground plane to provide a clean reference for the internal current-sense amplifier. Place the /FAULT pull-up resistor (10 kΩ typical) close to the IC pin to avoid noise pickup on the high-impedance open-drain line. Avoid routing the EN signal near the OUT power trace to prevent capacitive coupling that could falsely enable the switch.
Do not leave EN floating - the MIC2005A-1YM5-TR requires a defined logic level; a floating EN can cause indeterminate switching. Always use a 100 nF bypass on VIN even if the upstream rail is well-decoupled - the datasheet's recommended 1 µF is the minimum for robust operation. Do not pull /FAULT low externally; it is an open-drain output meant only to be pulled low by the IC. If your system needs to ignore /FAULT pulses during certain operations, use the blanking-time knowledge (32 ms) rather than masking the signal at the MCU.
The MIC2005A-1YM5-TR includes output slew-rate limiting to control turn-on dV/dt. This reduces inrush on capacitive loads and minimizes voltage transients on the upstream supply. If your downstream load has more than 22 µF of bulk capacitance, consider adding a small series resistor (1 Ω to 10 Ω) on OUT to further damp the LC step response. The /FAULT pin is an open-drain node and should be treated as a logic signal - keep it away from switching nodes to avoid capacitive coupling that could falsely trigger interrupts.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - this is an industrial-grade part, not automotive. Lead-free SOT-23-5 package. Halogen-free status not explicitly stated in the verified data; marked as unknown per data authenticity rules.
