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Diodes Incorporated AP2171DFMG-7
- Part No.:
- AP2171DFMG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP2171DFMG-7.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,991
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Product details
Overview
AP2171DFMG-7 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with integrated output discharge, 1.5A current limiting, 90mΩ RDS(ON) (U-DFN2018-6), and 7ms deglitched fault reporting - designed for hot-swap USB 2.0 ports in laptops, docking stations, and HUBs.
For engineers reviewing the AP2171DFMG-7 datasheet, AP2171DFMG-7 pinout, AP2171DFMG-7 application, or AP2171DFMG-7 equivalent, this device delivers precise over-current protection, reverse current blocking, UVLO, thermal shutdown with 25°C hysteresis, and controlled 0.6ms rise time - critical for reliable USB port power sequencing and fault resilience.
Technical Context
The AP2171D implements a thermally protected, slew-rate-controlled N-channel MOSFET gate driver with internal current-sense FET architecture - enabling accurate 1.5A current limiting without external sense resistors. Its UVLO threshold is fixed at 1.9V (typ), activating only when EN is asserted.
It integrates a dedicated NMOS discharge path (RDIS = 100Ω) activated upon EN de-assertion, ensuring rapid VOUT collapse (<0.6ms for 1µF), while its open-drain FLG output combines over-current and over-temperature detection with 7ms blanking to suppress false triggers from capacitive inrush.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 1.5A typical - clamps sustained load current to prevent damage during overload or short circuit |
| RDS(ON) | 90mΩ max (U-DFN2018-6, VIN=5V, TA=25°C) - minimizes conduction loss and self-heating at 1A |
| Input Voltage Range | 2.7V–5.5V - supports full USB 2.0 bus voltage range including low-voltage battery-backed operation |
| Rise Time | 0.6ms typical (CL=1µF, RLOAD=10Ω) - ensures soft-start compliance and limits inrush surge into downstream capacitance |
| Shutdown Current | 1µA max - enables ultra-low-power state retention in portable systems during port disable |
| FLG Blanking Time | 7ms typical - eliminates false fault flags caused by transient inrush currents up to 2A peak |
| Discharge Resistance | 100Ω - provides predictable RC-based output discharge timing (e.g., ~600µs for 1µF load) |
Pinout & Package
AP2171DFMG-7 is packaged in U-DFN2018-6 - a 2.0mm × 1.8mm, 0.5mm pitch, thermally enhanced leadless package with exposed pad for GND connection and improved θJA (70°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power Input | Primary supply input (2.7–5.5V); pins 2 & 3 internally tied - must be externally connected together |
| EN | Enable Control | Active-high logic input; asserts switch when ≥2V (VIH), disables below 0.8V (VIL) |
| GND | Ground Reference | System ground return; connects to exposed pad for thermal and electrical integrity |
| FLG | Fault Indicator | Open-drain output pulled low during over-current or over-temperature; 20Ω RFLG (typ) |
| OUT | Switched Output | High-side switched output; pins 5 & 6 internally tied - must be externally connected together |
Key Features
| Feature | Design Value |
|---|---|
| Output Discharge Function | Integrated 100Ω NMOS discharge path activated on EN de-assertion - eliminates need for external bleed resistor |
| Reverse Current Blocking | Prevents backflow from OUT to IN when VOUT > VIN and switch is disabled - protects upstream supplies |
| UVLO Protection | 1.9V turn-on threshold ensures switch remains off until stable input rail is established - essential for hot-plug reliability |
| Thermal Shutdown | 140°C trip with 25°C hysteresis - enables safe auto-recovery cycling under sustained overload without latch-up |
| ESD Robustness | 4kV HBM / 300V MM - meets industrial handling requirements without additional protection circuitry |
Applications
| USB 2.0 Port Power Switching | Laptop Docking Station Power Management |
|---|---|
Use Scenario: Isolating and powering individual USB Type-A ports on a multi-port hub board with shared 5V rail. IC Role / Device Role / Timing Role: High-side power switch controlling VBUS delivery; provides soft-start, current limiting, and fault flagging per port. Use Value: Prevents host system brown-out during simultaneous peripheral insertion and enables per-port fault isolation via FLG pin. |
Use Scenario: Managing power delivery to expansion modules (e.g., Ethernet, HDMI, SATA) in a laptop docking station. IC Role / Device Role / Timing Role: Hot-swap controller for auxiliary rails; coordinates power ramp, discharge, and thermal safety during module insertion/removal. Use Value: Eliminates mechanical interlocks and external timers; ensures clean power sequencing and automatic recovery after thermal events. |
| Desktop PC Front-Panel USB Hub | Industrial USB Peripheral Interface |
Use Scenario: Powering front-panel USB ports on desktop motherboards where long traces increase inrush risk. IC Role / Device Role / Timing Role: Localized current-limited switch placed adjacent to each USB connector to minimize trace inductance effects. Use Value: Reduces EMI from uncontrolled inrush and avoids false triggering of system-level OCP circuits due to localized transients. |
Use Scenario: Enabling/disabling USB-connected sensors or actuators in programmable logic controllers (PLCs) with strict fault logging. IC Role / Device Role / Timing Role: Supervised power gate with FLG tied to microcontroller GPIO for real-time fault diagnostics and event logging. Use Value: Provides deterministic fault response (7ms blanking + thermal hysteresis) compatible with industrial watchdog and logging requirements. |
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 |
|---|---|---|---|
| TUSB2036IPW | 3-port USB 2.0 hub IC with integrated power switches; no standalone discharge function; higher quiescent current (150µA) | Designed for full hub functionality (repeater + switching), not discrete port control | Select only when multi-port integration and USB protocol handling are required - not a drop-in replacement |
| TPS2051BDBVR | Single-channel, active-high, 1.5A limit, but lacks output discharge and has slower rise time (3ms typ) and no FLG deglitch | Requires external discharge circuitry and additional filtering for robust hot-swap in noisy environments | Choose when cost sensitivity outweighs need for integrated discharge and fast, glitch-immune fault reporting |
Compared with TUSB2036IPW and TPS2051BDBVR, AP2171DFMG-7 uniquely combines discharge, 7ms FLG blanking, and 90mΩ RDS(ON) in a 2mm×1.8mm package - delivering superior hot-swap reliability and board space efficiency for discrete USB port control.
Availability
AP2171DFMG-7 is available at Aetrix Electronics and suitable for USB 2.0 port switching, laptop docking station power management, and industrial USB peripheral interface applications requiring stable component supply and long-term lifecycle support.
Supply support for AP2171DFMG-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 AP2171D belongs to Diodes' USB power switch product line - engineered specifically for robust hot-swap operation in space-constrained USB endpoints, emphasizing low RDS(ON), integrated discharge, and fault resilience without external components.
FAQ
What is the maximum continuous load current supported by AP2171DFMG-7?
The AP2171DFMG-7 is rated for 1.0A maximum continuous load current per the manufacturer's Recommended Operating Conditions. Although its current-limit threshold is 1.5A (typ), sustained operation above 1A requires careful thermal design - especially in the U-DFN2018-6 package - due to RDS(ON) temperature dependence and θJA = 70°C/W.
Does AP2171DFMG-7 require external components for basic USB port protection?
No external components are required for core protection functions: UVLO, current limiting, thermal shutdown, reverse current blocking, and FLG deglitching are fully integrated. A 0.1µF ceramic capacitor between IN and GND is recommended for stability, and output bypassing improves transient immunity - but neither is mandatory for functional operation.
How does the output discharge function behave during enable de-assertion?
When EN is driven low, the internal 100Ω NMOS discharge switch activates between OUT and GND, discharging external output capacitance. For a 120µF load, discharge time is ~12ms (RC time constant); for 1µF, it is ~0.6ms. Discharge occurs only when the switch is disabled - not during normal operation or fault conditions.
Can AP2171DFMG-7 be used in dual-role USB ports (e.g., charging + data)?
No - AP2171DFMG-7 is not recommended for dual-purpose ports like USB-C or MHL/HDMI combo interfaces. Its integrated discharge function actively drains the output when disabled, which would continuously deplete batteries in connected peripherals. Use only in dedicated, unidirectional USB power delivery paths.
AP2171DFMG-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
AP2171DFMG-7 FAQ
1.How can I place an order for AP2171DFMG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2171DFMG-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 AP2171DFMG-7 reliable?
The price and inventory of AP2171DFMG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2171DFMG-7 is usually 5 days.
3.What payment methods are accepted for AP2171DFMG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2171DFMG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2171DFMG-7?
AP2171DFMG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2171DFMG-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 AP2171DFMG-7?
For technical support, including AP2171DFMG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2171DFMG-7 requirements.
6.How does Aetrix verify that AP2171DFMG-7 is sourced from the original manufacturer or authorized distributors?
All AP2171DFMG-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 AP2171DFMG-7 meets industry standards.
7.What is the process for return or replacement of AP2171DFMG-7?
All AP2171DFMG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2171DFMG-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 AP2171DFMG-7 part is unused and in its original packaging.
Return procedure for AP2171DFMG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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