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Diodes Incorporated AP2171AFM-7
- Part No.:
- AP2171AFM-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP2171AFM-7.pdf
- Description:
- IC PWR SWITCH P-CHAN 1:1 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,800
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Product details
Overview
AP2171AFM-7 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with 1.5A current limiting, 90mΩ typical RDS(ON) in U-DFN2018-6 package, and integrated short-circuit/thermal protection-designed for USB 2.0 hot-swap ports in laptops and docking stations.
For engineers reviewing the AP2171AFM-7 datasheet, AP2171AFM-7 pinout, AP2171AFM-7 application, or AP2171AFM-7 equivalent, this device delivers precise over-current response (7ms FLG blanking), reverse current blocking, 0.6ms typical rise time, and 1µA max shutdown current-critical for reliable USB port power control and system-level fault reporting.
Technical Context
The AP2171AFM-7 integrates a low-RDS(ON) N-channel MOSFET with internal current-sense FET architecture, enabling accurate 1.5A current limiting without external sense resistors. Its active-high EN input directly interfaces with USB host controllers requiring logic-compatible enable signaling.
It implements dual-stage protection: fast current limiting (ILIMIT = 1.5A typ) followed by thermal shutdown at ~145°C with 25°C hysteresis, while the open-drain FLG output asserts after 7ms deglitch to reject transient inrush events-eliminating need for external RC filtering in USB-compliant designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 1.5A typical; clamps output during overload to prevent damage to downstream USB loads and upstream power rail. |
| RDS(ON) | 90mΩ typical (U-DFN2018-6, VIN = 5V, TA = +25°C); minimizes voltage drop and power loss at 1A load (≤90mV drop). |
| Input Voltage Range | 2.7V–5.5V; supports full USB 2.0 bus voltage range including degraded 3.3V auxiliary rails and nominal 5V supplies. |
| Rise Time | 0.6ms typical (CL = 1µF, RLOAD = 10Ω); provides controlled soft-start to suppress inrush current during hot-plug events. |
| FLG Blanking Time | 7ms typical; prevents false fault reporting from capacitive load turn-on transients-no external components required. |
| Shutdown Current | 1µA maximum; enables ultra-low-power state when disabled-critical for battery-backed or always-on USB hubs. |
| Reverse Leakage | 1µA max (VIN = 0V, VOUT = 5V); blocks backfeed from powered peripherals into host supply during sleep or disconnect. |
Pinout & Package
AP2171AFM-7 is housed in a 2.0mm × 1.8mm, 0.5mm pitch, thermally enhanced U-DFN2018-6 package with exposed pad (to be connected to GND for thermal performance). Pin functions are validated per Diodes DS37617 Rev. 1-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for power and logic; exposed pad must be soldered to PCB ground plane for thermal management. |
| IN | Power input | Connects to USB VBUS (2.7–5.5V); all IN pins tied externally-accepts up to 6.5V absolute max. |
| EN | Enable control | Active-high digital input; 2.0V min VIH ensures compatibility with 3.3V and 5V logic systems. |
| FLG | Fault indicator | Open-drain output pulled low during over-current or over-temperature; requires external pull-up for host MCU monitoring. |
| OUT | Switched output | Delivers regulated power to downstream USB port; all OUT pins tied externally-supports ≤1.0A continuous load. |
Key Features
| Feature | Design Value |
|---|---|
| USB 2.0 Compliance | Fully compliant with USB 2.0 power switching requirements-including current limiting, fault reporting, and hot-swap timing. |
| Integrated Deglitch | 7ms FLG blanking eliminates false over-current triggers from capacitor charging surges-no external RC network needed. |
| Reverse Current Blocking | Prevents backflow from powered peripheral (e.g., smartphone battery) into host VBUS-ensures system isolation during suspend. |
| Thermal Hysteresis | 25°C hysteresis between thermal shutdown (145°C) and recovery prevents oscillation under sustained overload conditions. |
| Low Quiescent Current | 70µA typical enabled IQ and 1µA max shutdown current extend battery life in portable USB hosts and hubs. |
Applications
| USB Host Port Protection | Self-Powered Hub Port Control |
|---|---|
|
Use Scenario: Protecting individual USB ports on a laptop motherboard against short circuits during peripheral insertion. IC Role / Device Role / Timing Role: High-side power switch with active-high enable synchronized to USB controller enumeration sequence. Use Value: Limits fault current to 1.5A, reports via FLG within 7ms, and blocks reverse current-preserving host VBUS stability and preventing system reset. |
Use Scenario: Managing power delivery to downstream ports in a desktop self-powered USB hub with independent port disable capability. IC Role / Device Role / Timing Role: Independent channel switch enabling/disabling per-port power with controlled 0.6ms rise time to meet USB suspend/resume timing. Use Value: Enables per-port over-current isolation and hot-plug compliance without shared current sensing-reducing BOM count vs discrete solutions. |
| Docking Station Power Management | HDMI/MHL Dual-Function Port |
|
Use Scenario: Providing isolated 5V power to USB peripherals (keyboard, storage) when a laptop is docked-while maintaining independent fault handling. IC Role / Device Role / Timing Role: Hot-swap power switch placed between dock's main 5V rail and each USB port, with FLG routed to dock MCU for diagnostics. Use Value: Prevents dock-wide shutdown due to single-port fault; 90mΩ RDS(ON) keeps voltage drop ≤90mV at 1A-ensuring USB spec-compliant VBUS regulation. |
Use Scenario: Enabling simultaneous HDMI video streaming and battery charging through a shared mobile port (e.g., smartphone-to-TV MHL connection). IC Role / Device Role / Timing Role: USB power switch controlling VBUS delivery only after host confirms port mode negotiation-preventing premature charging current flow. Use Value: Reverse current blocking isolates phone battery from TV's 5V rail; UVLO ensures switch remains off until stable 2.7V+ is present-avoiding brownout during mode switching. |
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 transceiver with integrated 5V switch; higher integration but fixed 1.2A current limit and no FLG output. | Designed for full USB hub IC implementation-not suitable for discrete port-level switching or fault reporting. | Select when consolidating transceiver + switch functionality; avoid when discrete FLG monitoring or >1.2A current capability is required. |
| TPS2051BDBVR | Single-channel 1.5A USB power switch with active-low EN, 110mΩ RDS(ON), and 14ms FLG blanking-TI's pin-compatible alternative. | Same functional scope but longer blanking time increases risk of missed transient faults in high-CL applications. | Choose for TI ecosystem alignment; verify FLG timing margin with 68µF–470µF output capacitance per design. |
Compared with TUSB2036IRHBR and TPS2051BDBVR, AP2171AFM-7 offers superior fault responsiveness (7ms blanking), lower conduction loss (90mΩ), and active-high EN-making it optimal for compact, discrete USB port protection where precise current limiting and real-time fault visibility are critical.
Availability
AP2171AFM-7 is available at Aetrix Electronics and suitable for USB 2.0 host ports, self-powered hubs, and docking station power distribution requiring stable component supply, consistent thermal performance, and long-term industrial lifecycle support.
Supply support for AP2171AFM-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 high-reliability power management, signal integrity, and protection solutions for consumer, computing, and industrial markets.
The AP2171A series belongs to Diodes' USB power switch product line-engineered specifically for robust, low-footprint hot-swap protection in space-constrained USB endpoints with strict ESD (4kV HBM) and RoHS compliance requirements.
FAQ
What is the maximum continuous load current supported by AP2171AFM-7?
The AP2171AFM-7 is rated for 1.0A maximum continuous load current per the manufacturer's recommended operating conditions-even though its current-limit threshold is 1.5A. This derating ensures safe thermal operation in the U-DFN2018-6 package across -40°C to +85°C ambient, accounting for RDS(ON) increase at temperature and PCB thermal resistance.
Does AP2171AFM-7 require external components for basic USB port protection?
No external components are required for core USB protection functions. A 0.01–0.1µF ceramic bypass capacitor near IN–GND is recommended, but the 7ms FLG deglitch, UVLO, thermal shutdown, and current limiting are fully internal-enabling minimal BOM implementation in space-constrained USB ports.
How does the FLG output behave during a short-circuit event?
When a short circuit occurs, the AP2171AFM-7 enters current-limit mode immediately, then asserts the open-drain FLG pin low after a nominal 7ms deglitch period. FLG remains low until both over-current and over-temperature conditions clear-providing unambiguous fault status to the host MCU without chatter.
Can AP2171AFM-7 be used in automotive USB applications?
AP2171AFM-7 is specified for -40°C to +85°C ambient operation and meets USB 2.0 electrical requirements, but it is not AEC-Q100 qualified. For automotive infotainment USB ports, it may be used in non-safety-critical accessory power paths-subject to full system-level validation including extended temperature cycling and EMC testing.
AP2171AFM-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 6-UFDFN Exposed Pad
- 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):
- 90mOhm
- 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:
- U-DFN2018-6
AP2171AFM-7 FAQ
1.How can I place an order for AP2171AFM-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2171AFM-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 AP2171AFM-7 reliable?
The price and inventory of AP2171AFM-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2171AFM-7 is usually 5 days.
3.What payment methods are accepted for AP2171AFM-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2171AFM-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2171AFM-7?
AP2171AFM-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2171AFM-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 AP2171AFM-7?
For technical support, including AP2171AFM-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2171AFM-7 requirements.
6.How does Aetrix verify that AP2171AFM-7 is sourced from the original manufacturer or authorized distributors?
All AP2171AFM-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 AP2171AFM-7 meets industry standards.
7.What is the process for return or replacement of AP2171AFM-7?
All AP2171AFM-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2171AFM-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 AP2171AFM-7 part is unused and in its original packaging.
Return procedure for AP2171AFM-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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