MIC2005A-1YM6-TR - 500mA High-Side P-Channel Power Switch | Microchip
MPN: MIC2005A-1YM6-TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.49 | $0.49 |
| 10 | $0.42 | $4.20 |
| 100 | $0.34 | $34.00 |
| 500 | $0.27 | $135.00 |
| 1,000 | $0.23 | $230.00 |
| 3,000 | $0.19 | $570.00 |
MIC2005A-1YM6-TR Overview
A high-side power switch is an integrated load-switch IC that sits between a power rail and the downstream load, replacing a discrete P-channel MOSFET plus current-sense resistor plus control circuitry with a single component. It belongs to the broader power-management IC hierarchy: power switch -> load switch -> power distribution switch -> power management IC. High-side switches offer reverse-current blocking and ground-referenced load control, simplifying USB port power, hot-plug rails, and battery protection circuits.
Key features include 500 mA fixed current limit, low quiescent current, fault flag output for overcurrent reporting, thermal shutdown protection, and undervoltage lockout. The internal P-channel MOSFET provides low on-resistance to minimize voltage drop and conduction loss, while internal slew-rate control limits inrush current during turn-on. The active-high enable pin allows logic-level control from a microcontroller GPIO.
Architecturally, the MIC2005A integrates a P-channel pass FET, a current-sense comparator, a fault timer with blanking, and a thermal shutdown block on a single CMOS die. The fault blanking circuit prevents nuisance tripping from load transients, while the thermal shutdown latches off the FET when junction temperature exceeds safe limits. The device is offered in a 6-pin SOT-23 package that occupies approximately 9 mm² of board area, making it suitable for space-constrained portable designs.
Typical applications include USB port power distribution, hot-swap peripherals, set-top boxes, digital televisions, printers, notebook PCs, and PDA accessories. The 500 mA current limit aligns with USB 2.0 downstream port requirements, making this part particularly attractive for legacy USB power-switching functions.
When designing with this device, place the input bypass capacitor as close as possible to the VIN pin and ensure the output capacitor does not exceed the datasheet maximum to prevent false fault triggering. The fault output is open-drain and requires a pull-up resistor.
This page synthesizes distributor pricing, drop-in alternatives drawn from the Microchip MIC20XX family, and practical design notes that complement the manufacturer datasheet.
Drop-in alternatives for MIC2005A-1YM6-TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MIC2005A-1YM6-TR (same form factor and footprint) — differing in Fault Flag Output, Function, Operating Temperature Range, Package, Thermal Shutdown.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MIC2005A-2YM6-TR
✅ Drop-In✓ In Stock
$0.33 / Unit
View Datasheet →MIC2009A-1YM6-TR
✅ Drop-In📋 Reference alternative (not in catalog)
MIC2005-0.5YM6-TR
✅ Drop-In📋 Reference alternative (not in catalog)
MIC2005A-1YM6
✅ Drop-In📋 Reference alternative (not in catalog)
MIC2005A-1YM6-TR Maximum Ratings & Electrical Characteristics
| Function | High-side power distribution switch |
| Switch Type | P-Channel MOSFET |
| Number of Outputs | 1 |
| Input Voltage Range | 2.5 V to 5.5 V |
| Continuous Load Current | 500 mA |
| Current Limit | 500 mA (fixed) |
| Enable Input Polarity | Active-High |
| Fault Flag Output | Yes (active-low, open-drain) |
| Thermal Shutdown | Yes |
| Undervoltage Lockout | Yes |
| Operating Temperature Range | -40C to +85C |
| Package | SOT-23-6 |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
MIC2005A-1YM6-TR Pin Configuration
| Pin 1 | VIN — Input supply voltage (2.5 V to 5.5 V) |
| Pin 2 | GND — Ground |
| Pin 3 | EN — Active-high enable input |
| Pin 4 | FLG — Fault flag output (active-low, open-drain) |
| Pin 5 | OUT — Switched output to load |
| Pin 6 | NC — Not connected (per datasheet) |
Typical Applications
MIC2005A-1YM6-TR is suitable for 6 applications: USB 2.0 Port Power Switching, Hot-Plug Peripheral Protection, Set-Top Box and Digital TV Power Distribution, Printer and Office Equipment Load Switching, Notebook PC and Tablet Accessory Power, PDA and Handheld Device Power Management.
USB 2.0 Port Power Switching
The MIC2005A-1YM6-TR's 500 mA fixed current limit exactly matches the USB 2.0 downstream port enumeration specification, making it ideal for host-side USB port power switching. The active-high enable input is compatible with 3.3 V GPIO from common USB host controllers, while the fault flag output signals overcurrent events back to the host for compliance with battery-charging and port-power-management requirements. Placed between the 5 V VBUS rail and the USB connector pin with a 1 uF ceramic bypass, the part eliminates the discrete P-FET plus current-sense resistor plus control logic traditionally required for USB power switching, reducing BOM count and PCB area in laptops, set-top boxes, and docking stations.
Recommended
Hot-Plug Peripheral Protection
Hot-plug peripherals such as external hard drives, optical drives, and PCMCIA cards draw large inrush currents that can damage host connectors and backplane traces. The MIC2005A-1YM6-TR integrates slew-rate control on turn-on to limit inrush to within USB 2.0 specifications, while the fixed 500 mA current limit and fault blanking circuit protect against sustained overcurrent from shorted cables or failed downstream regulators. Placed on the host-side of the connector with input TVS protection, it allows safe insertion and removal of peripherals under live power. The fault output can trigger a host controller interrupt to log the event or shut down other affected rails.
Recommended
Set-Top Box and Digital TV Power Distribution
Set-top boxes and digital televisions have multiple 5 V and 3.3 V rails powering tuners, demodulators, HDMI transmitters, and front-panel LEDs that benefit from individually-switched power domains for standby power reduction. The MIC2005A-1YM6-TR's 500 mA rating covers typical tuner and demodulator loads, while its SOT-23-6 footprint fits in tight PCB corners near each load. With an active-high enable driven by the main SoC GPIO, the host can shut down unused domains during standby, reducing overall system power by hundreds of milliwatts. The fault flag alerts the SoC to downstream shorts, enabling graceful error recovery in consumer premises equipment.
Recommended
Printer and Office Equipment Load Switching
Printers and multifunction office equipment contain multiple motor drivers, heaters, and logic subsystems that can be individually switched off when not in use to extend product life and reduce energy consumption. The MIC2005A-1YM6-TR serves as a low-side controller for USB and front-panel USB ports in printers, while protecting the host logic from short circuits caused by damaged cables or connectors. With thermal shutdown and undervoltage lockout, the device survives harsh electrical environments common in industrial office settings. The 6-pin SOT-23 footprint integrates cleanly into printer controller boards where space is at a premium and reliability is essential.
Recommended
Notebook PC and Tablet Accessory Power
Notebook PCs and tablets have multiple USB ports, charging ports, and accessory connectors that benefit from per-port power switching to meet energy-star standby requirements. The MIC2005A-1YM6-TR's 2.5 V to 5.5 V input range covers both 3.3 V and 5 V system rails, while its 500 mA current limit aligns with USB 2.0 and many proprietary charging standards. Designers can place one MIC2005A per port, each with a dedicated enable from the embedded controller, achieving independent port power management. The fault output signals back to the EC for overcurrent logging and user notification in enterprise fleet management.
Recommended
PDA and Handheld Device Power Management
PDA and handheld device designs require ultra-compact power switching for display backlights, radios, sensors, and user-interface peripherals. The MIC2005A-1YM6-TR's SOT-23-6 footprint occupies only 9 mm² of board area, ideal for these space-constrained applications. With low quiescent current consumption and a logic-level enable input, it can be driven directly from a low-power microcontroller GPIO to switch off unused subsystems during sleep modes. The fixed 500 mA current limit protects against ESD-induced latch-up in handheld antenna circuits, while thermal shutdown prevents catastrophic failure during charger-fault events in the field.
Recommended
Recommended Products Summary
Engineering reference data for MIC2005A-1YM6-TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MIC2005A-2YM6-TR | MIC2009A-1YM6-TR | MIC2005-0.5YM6-TR | MIC2005A-1YM6 |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Package | SOT-23-6 | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same | SOT-23-6 - same |
| Current Limit | 500 mA (fixed) | Alternate fixed option | 900 mA | 0.5 A adjustable | 500 mA fixed |
| 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 |
| Enable Polarity | Active-High | Active-High | Active-High | Active-High | Active-High |
| Fault Flag Output | Yes (active-low, open-drain) | Yes | Yes | Yes | Yes |
| Thermal Shutdown | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Fixed 500 mA current limit precisely matches USB 2.0 specification (vs MIC2005-0.5YM6-TR)
- Higher current capacity in same footprint (vs MIC2009A-1YM6-TR)
- Identical die, alternative packaging option (vs MIC2005A-1YM6)
Design Notes
Place a 1 uF ceramic bypass capacitor as close as possible to the VIN pin of the MIC2005A-1YM6-TR to suppress transient voltages and provide instantaneous current during load steps. The output capacitor on the OUT pin should not exceed the datasheet maximum (typically 470 uF) to prevent false fault triggering from inrush charging. Route the GND pin directly to the ground plane via a short, wide trace to ensure low-impedance fault current return. Keep high-current OUT traces short and wide to minimize voltage drop and thermal rise.
Estimated: at VIN=5 V, VOUT=5 V, and 500 mA continuous load, the MIC2005A-1YM6-TR dissipates approximately (5 V x 0.025 ohm typical RDS(on) x 0.5 A) approximately 6 mW when fully on, which is well within the SOT-23-6 thermal rating. However, during fault conditions or short-circuit events, the device dissipates much higher power (5 V x 500 mA = 2.5 W) for the duration of the fault blanking interval. Provide adequate copper pour (at least 100 mm²) connected to the GND pin to ensure the junction temperature stays below the thermal shutdown threshold during sustained faults.
The fault flag output is open-drain and requires an external pull-up resistor (typically 10 kohm to VIN) for proper logic-level signaling. Do not leave the FLG pin floating; this can cause false fault indications from coupled noise. The enable pin must be driven logic-high for normal operation; floating EN can result in undefined behavior. For applications requiring active-low enable, select the MIC20XX -2 variant instead. Always verify the current-limit option matches your load requirements before committing to the PCB layout.
Compliance Information
RoHS compliant per Microchip product page. Standard commercial grade - not AEC-Q100 qualified; not intended for automotive applications.
