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Diodes Incorporated AP2191FMG-7
- Part No.:
- AP2191FMG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP2191FMG-7.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,986
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Product details
Overview
AP2191FMG-7 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with 2.1A current limiting, 95mΩ RDS(ON) at 5V, and integrated short-circuit/thermal protection. It operates from 2.7V to 5.5V input and delivers controlled 0.6ms rise time for hot-swap USB 2.0 port power management in laptops and docking stations.
For engineers reviewing the AP2191FMG-7 datasheet, AP2191FMG-7 pinout, AP2191FMG-7 application, or AP2191FMG-7 equivalent, key selection criteria include enable polarity (active-high), fault flag deglitch timing (7ms typ), reverse current blocking capability, thermal shutdown threshold (+140°C), and U-DFN2018-6 package thermal resistance (70°C/W).
Technical Context
The AP2191FMG-7 implements a MOSFET-based high-side switch with integrated current-sense FET architecture-eliminating external sense resistors while maintaining low conduction loss. Its UVLO circuit disables switching below 1.9V input, ensuring safe hot-insertion behavior in USB host systems.
Thermal protection uses die-temperature sensing with +140°C trip point and +25°C hysteresis, enabling auto-recovery cycling during sustained overload. The open-drain FLG output asserts low after 7ms deglitch timeout only when both over-current and over-temperature faults persist-rejecting transient inrush events without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 2.1A typical-clamps output during overload to protect downstream loads and upstream supply |
| RDS(ON) | 90–110mΩ (U-DFN2018-6, 25°C)-enables <150mW conduction loss at 1.5A load |
| Input Voltage Range | 2.7V to 5.5V-fully covers USB 2.0 VBUS tolerance and supports 3.3V auxiliary rails |
| Enable Polarity | Active-high-simplifies direct interface with 3.3V/5V logic without level-shifting |
| FLG Blanking Time | 7ms typical-suppresses false fault reporting during capacitive load turn-on transients |
| Shutdown Current | ≤1µA max-minimizes standby power in battery-backed or always-on USB ports |
| Thermal Shutdown | +140°C trip with +25°C hysteresis-provides robust self-protection during sustained short-circuit conditions |
Pinout & Package
AP2191FMG-7 is packaged in a 2.0mm × 1.8mm U-DFN2018-6 with exposed thermal pad (connected to GND). This thermally enhanced leadless package achieves 70°C/W junction-to-ambient resistance under standard PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for power and logic; must be connected to PCB ground plane via thermal pad |
| IN | Power input | Accepts 2.7–5.5V supply; all IN pins tied together externally per datasheet |
| EN | Enable control | Active-high logic input; requires ≥2.0V to enable switch; ≤0.8V to disable |
| FLG | Fault indicator | Open-drain output pulled low after 7ms deglitch on over-current or over-temperature event |
| OUT | Switched output | Delivers regulated power to load; all OUT pins tied together externally |
Key Features
| Feature | Design Value |
|---|---|
| Reverse current blocking | Prevents backflow from loaded OUT to IN when disabled-critical for multi-rail USB hubs |
| Controlled 0.6ms rise time | Soft-starts output voltage to limit inrush current into large capacitive loads (e.g., 120µF) |
| Integrated UVLO | Disables switch below 1.9V input-ensures clean power-up sequencing and prevents brown-out operation |
| ESD robustness | 4kV HBM rating-meets IEC61000-4-2 system-level ESD immunity requirements for consumer USB ports |
| Green packaging | Halogen- and antimony-free, RoHS-compliant molding compound (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| USB 2.0 Host Port Protection | Laptop Docking Station Power Control |
|---|---|
Use Scenario: Single-port USB host controller supplying power to peripherals such as keyboards, flash drives, or webcams. IC Role / Device Role / Timing Role: High-side power switch managing VBUS delivery with over-current fault reporting to host controller via FLG. Use Value: Prevents bus-wide shutdown during peripheral short-circuit events while maintaining host communication integrity. | Use Scenario: Docking station with multiple USB-A ports requiring independent power enable/disable per port. IC Role / Device Role / Timing Role: Individual channel switch enabling hot-plug detection and per-port current limiting with 7ms fault blanking. Use Value: Enables safe insertion/removal of USB devices without disrupting other docked peripherals or host system stability. |
| Set-Top Box USB Peripheral Interface | Smartphone Charging Hub Management |
Use Scenario: Consumer set-top box providing USB power to streaming sticks or external storage drives. IC Role / Device Role / Timing Role: USB-compliant power switch enforcing 2.1A current limit and reverse current isolation during device disconnect. Use Value: Eliminates need for discrete polyfuse and diode, reducing BOM count and PCB area while improving reliability. | Use Scenario: Multi-device charging hub managing power distribution to smartphones, tablets, and accessories. IC Role / Device Role / Timing Role: Active-high enable switch coordinating with USB PD controller to gate VBUS during negotiation or fault conditions. Use Value: Provides precise current limiting and thermal recovery cycling-preventing overheating during simultaneous fast-charging events. |
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 |
|---|---|---|---|
| TPS2051BDBVR | 2.3A current limit, 110mΩ RDS(ON), active-low EN, SOT-23-5 package | Requires external pull-up for active-high logic interface; higher RDS(ON) increases conduction loss at 1.5A | Select if legacy active-low control architecture exists and thermal budget allows 110mΩ |
| AP2181FMG-7 | Same 2.1A limit and 90–110mΩ RDS(ON), but active-low EN and identical U-DFN2018-6 footprint | Direct pin-compatible replacement where enable polarity matches existing board logic | Choose when redesigning for active-low control or reusing AP2191 layout with EN inversion |
Compared with TPS2051BDBVR and AP2181FMG-7, the AP2191FMG-7 uniquely combines active-high enable, ultra-low 90mΩ RDS(ON) in U-DFN2018-6, and 7ms FLG deglitch-making it optimal for space-constrained, logic-simple USB port designs requiring minimal external components.
Availability
AP2191FMG-7 is available at Aetrix Electronics and suitable for USB 2.0 host port protection, laptop docking station power control, and set-top box peripheral interfaces requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for AP2191FMG-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 AP2191 belongs to Diodes' USB power switch product line-designed specifically for compliant, compact, and thermally efficient hot-swap power delivery in portable and embedded USB 2.0 systems.
FAQ
What is the maximum continuous load current supported by AP2191FMG-7?
The AP2191FMG-7 supports a recommended maximum continuous load current of 1.5A. While its current-limit threshold is 2.1A, sustained operation above 1.5A requires careful thermal design due to power dissipation in the U-DFN2018-6 package. Derating is necessary above +60°C ambient to maintain junction temperature below +150°C.
Does AP2191FMG-7 require external components for basic USB 2.0 operation?
No external components are required for core functionality. A 0.01–0.1µF ceramic capacitor between IN and GND is recommended for noise suppression, and output capacitance (≥10µF) improves transient response-but neither is mandatory for enable/disable or fault reporting. The 7ms FLG deglitch is fully internal.
How does the FLG pin behave during a short-circuit event?
During a short-circuit, the FLG pin remains high for the first 7ms (deglitch period), then pulls low and stays low until both over-current and over-temperature conditions clear. If the short persists, FLG stays asserted low; upon removal, it returns high within microseconds once internal conditions normalize-no reset pulse needed.
Can AP2191FMG-7 be used in USB-C applications?
The AP2191FMG-7 is specified for USB 2.0 compliance only and lacks support for USB-C features like CC logic, VCONN, or alternate mode signaling. It may serve as a VBUS switch in USB-C receptacles where legacy USB 2.0 data paths are used-but not for full USB-C PD or configuration channel functions.
AP2191FMG-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):
- 1.5A
- 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
AP2191FMG-7 FAQ
1.How can I place an order for AP2191FMG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2191FMG-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 AP2191FMG-7 reliable?
The price and inventory of AP2191FMG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2191FMG-7 is usually 5 days.
3.What payment methods are accepted for AP2191FMG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2191FMG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2191FMG-7?
AP2191FMG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2191FMG-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 AP2191FMG-7?
For technical support, including AP2191FMG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2191FMG-7 requirements.
6.How does Aetrix verify that AP2191FMG-7 is sourced from the original manufacturer or authorized distributors?
All AP2191FMG-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 AP2191FMG-7 meets industry standards.
7.What is the process for return or replacement of AP2191FMG-7?
All AP2191FMG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2191FMG-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 AP2191FMG-7 part is unused and in its original packaging.
Return procedure for AP2191FMG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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