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Diodes Incorporated AP2171AW-7
- Part No.:
- AP2171AW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2171AW-7.pdf
- Description:
- IC PWR SWITCH P-CHAN 1:1 SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:118,375
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Product details
Overview
AP2171AW-7 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with 1.5A current limiting, 95mΩ RDS(ON), 2.7V–5.5V input range, and integrated short-circuit/thermal protection - deployed in SOT25 for USB port power control in laptops and docking stations.
For engineers reviewing the AP2171AW-7 datasheet, AP2171AW-7 pinout, AP2171AW-7 application, or AP2171AW-7 equivalent, this device supports hot-swap sequencing, reverse-current blocking, 7ms FLG deglitching, and UVLO at 1.9V - critical for reliable USB 2.0-compliant power delivery in space-constrained consumer and computing systems.
Technical Context
The AP2171AW-7 integrates a low-RDS(ON) N-channel MOSFET with precision current-sense circuitry to enforce 1.5A overcurrent limiting without external components. Its active-high EN pin directly interfaces with USB host controllers requiring logic-compatible enable signaling.
It implements dual-stage fault response: immediate current clamping at ILIMIT (1.5A typ) upon overload, followed by thermal shutdown at ~145°C with 25°C hysteresis. The open-drain FLG output asserts low after 7ms blanking to reject transient inrush events - eliminating false reporting during capacitor charging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 1.5A typical - maintains safe load current under sustained overload without shutdown |
| RDS(ON) | 95mΩ at +25°C, VIN=5V - minimizes conduction loss and self-heating in 1A continuous operation |
| Input Voltage Range | 2.7V–5.5V - supports full USB 2.0 bus voltage tolerance including brownout conditions |
| Enable Polarity | Active High - simplifies interface with USB host controller GPIOs without level-shifting |
| FLG Blanking Time | 7ms typical - suppresses false fault flags during capacitive load turn-on transients |
| Shutdown Current | 1µA max - enables ultra-low-power standby in battery-backed USB peripherals |
| UVLO Threshold | 1.9V typical - prevents erratic switching during input power ramp-up or dropout |
Pinout & Package
AP2171AW-7 is packaged in SOT25 - a 5-pin, surface-mount package with exposed pad for thermal enhancement. Pin 1 (OUT), Pin 2 (IN), Pin 3 (EN), Pin 4 (FLG), Pin 5 (GND). Exposed pad must be soldered to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Power output terminal | Switched VOUT node; all OUT pins internally tied - requires external connection to load |
| IN (Pin 2) | Power input terminal | Main supply input (2.7–5.5V); connects to upstream USB VBUS or local regulator |
| EN (Pin 3) | Enable control input | Active-high logic input; drives internal gate driver when ≥2.0V (VIH min) |
| FLG (Pin 4) | Fault reporting output | Open-drain flag asserted low during overcurrent or thermal fault after 7ms deglitch |
| GND (Pin 5) | Ground reference | Primary return path for load current and internal bias; exposed pad must connect to GND |
Key Features
| Feature | Design Value |
|---|---|
| Reverse current blocking | Prevents backfeed from output to input when disabled - essential for multi-rail USB systems |
| Controlled 0.6ms rise time | Soft-start limits inrush current into downstream capacitance, avoiding VBUS droop |
| Integrated UVLO | Ensures switch remains off until input stabilizes above 1.9V - guarantees clean hot-plug insertion |
| ESD robustness | 4kV HBM rating - withstands handling and system-level ESD events without latch-up |
| Thermal shutdown with hysteresis | Shuts down at ~145°C and auto-recovers after cooling ~25°C - enables fault-tolerant operation |
Applications
| USB 2.0 Port Power Switching | Laptop Docking Station Power Control |
|---|---|
Use Scenario: Isolating individual USB downstream ports on a host controller to prevent bus-wide faults. IC Role / Device Role / Timing Role: High-side power switch enforcing per-port current limiting and fault reporting via FLG. Use Value: Enables compliance with USB 2.0 specification for overcurrent protection while supporting hot-plug detection. | Use Scenario: Managing power delivery to multiple peripheral interfaces (HDMI, USB, Ethernet) on a compact laptop dock. IC Role / Device Role / Timing Role: Single-channel load switch providing controlled VBUS ramp and reverse-current isolation. Use Value: Prevents backfeeding between dock rails and extends system reliability during cable insertion/removal. |
| Smartphone Charging Hub | Set-Top Box USB Peripheral Interface |
Use Scenario: Dual-purpose HDMI/MHL port delivering video and simultaneous battery charging via shared VBUS line. IC Role / Device Role / Timing Role: Active-high enable switch ensuring Vin ramps before EN assertion to avoid shoot-through. Use Value: Guarantees safe power sequencing for mixed-signal ports where data and power share physical connectivity. | Use Scenario: Providing isolated 5V power to USB-connected storage or streaming dongles in entertainment devices. IC Role / Device Role / Timing Role: Hot-swap power controller with 7ms FLG blanking to ignore capacitor charging surges. Use Value: Eliminates need for external RC filtering on FLG, reducing BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side USB power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TUSB2036IRHBR | 3-channel USB 2.0 hub IC with integrated power switches; includes USB transceivers and protocol logic | Requires full USB hub functionality - not a standalone switch | Select only when full hub architecture (including packet routing) is needed |
| TPS2051BDBVR | 1.5A single-channel switch with active-low EN, 110mΩ RDS(ON), no FLG deglitching | Lacks 7ms blanking - prone to false FLG assertions with large output caps | Choose when EN polarity matches legacy designs and FLG timing margin is acceptable |
Compared with TUSB2036IRHBR and TPS2051BDBVR, AP2171AW-7 delivers dedicated, pin-efficient USB power switching with guaranteed 7ms fault blanking and active-high EN - optimizing design simplicity and reliability for discrete port control without protocol overhead.
Availability
AP2171AW-7 is available at Aetrix Electronics and suitable for USB 2.0 port protection, laptop docking station power management, and set-top box peripheral interfaces requiring stable component supply across industrial temperature ranges.
Supply support for AP2171AW-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for high-volume electronics markets.
The AP2171A product line targets USB-compliant hot-swap power distribution, emphasizing low RDS(ON), precise current limiting, and robust fault handling in miniature packages for space-constrained portable and computing systems.
FAQ
What is the maximum continuous load current supported by AP2171AW-7?
The AP2171AW-7 supports 1.0A maximum continuous load current per the datasheet's Recommended Operating Conditions. Although its current limit is 1.5A, sustained operation above 1.0A risks thermal saturation in SOT25 without adequate PCB copper pour, especially above +60°C ambient.
Does AP2171AW-7 require external components for basic USB overcurrent protection?
No external components are required for core overcurrent protection. The device integrates current sensing, thermal shutdown, UVLO, and 7ms FLG blanking. Only a 0.01–0.1µF ceramic bypass capacitor between IN and GND is recommended for stability - no sense resistor, RC filter, or pull-up on FLG is needed.
How does the FLG pin behave during a short-circuit event?
Upon short-circuit detection, the FLG pin remains high for ~7ms (deglitch timeout), then pulls low via internal open-drain FET. It stays low until both overcurrent and overtemperature conditions clear. Recovery is automatic - no reset or EN toggling is required once the fault is removed.
Can AP2171AW-7 be used in automotive applications?
AP2171AW-7 is rated for –40°C to +85°C ambient operation and meets USB 2.0 requirements, but it lacks AEC-Q100 qualification, automotive-grade PPAP documentation, or extended temperature support beyond +85°C. It is intended for commercial computing and consumer electronics, not under-hood automotive use.
AP2171AW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- USB Switch
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- P-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 1A
- Rds On (Typ):
- 95mOhm
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, Reverse Current, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP2171AW-7 FAQ
1.How can I place an order for AP2171AW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2171AW-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AP2171AW-7 reliable?
The price and inventory of AP2171AW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2171AW-7 is usually 5 days.
3.What payment methods are accepted for AP2171AW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2171AW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2171AW-7?
AP2171AW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2171AW-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AP2171AW-7?
For technical support, including AP2171AW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2171AW-7 requirements.
6.How does Aetrix verify that AP2171AW-7 is sourced from the original manufacturer or authorized distributors?
All AP2171AW-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP2171AW-7 meets industry standards.
7.What is the process for return or replacement of AP2171AW-7?
All AP2171AW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2171AW-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AP2171AW-7 part is unused and in its original packaging.
Return procedure for AP2171AW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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