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Diodes Incorporated AP2191DWG-7
- Part No.:
- AP2191DWG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2191DWG-7.pdf
- Description:
- IC PWR SWITCH P-CHAN 1:1 SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:62,152
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Product details
Overview
AP2191DWG-7 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with integrated output discharge, 2.1A 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 AP2191DWG-7 datasheet, AP2191DWG-7 pinout, AP2191DWG-7 application, or AP2191DWG-7 equivalent, this device delivers precise overcurrent protection, reverse-current blocking, UVLO, thermal shutdown with 25°C hysteresis, and controlled 0.6ms rise time - critical for reliable USB port power management under transient load conditions.
Technical Context
The AP2191DWG-7 implements a thermally protected, slew-rate-controlled N-channel MOSFET gate driver with internal current-sense FET architecture - eliminating external sense resistors while maintaining ±15% current-limit accuracy across -40°C to +85°C. Its UVLO threshold (1.9V typ) activates only when enabled, ensuring safe startup during hot-insertion.
It integrates a dedicated NMOS discharge path (RDIS = 100Ω) activated on disable, enabling rapid VOUT decay without external components. The open-drain FLG pin combines overcurrent and overtemperature detection with a fixed 7ms blanking window to suppress false triggers from capacitive inrush.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 2.1A typical - clamps sustained output 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 1.5A continuous load. |
| 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) - limits inrush current during hot-plug events. |
| Shutdown Current | 1µA max - enables ultra-low-power standby in portable systems with strict quiescent budget. |
| FLG Blanking Time | 7ms typical - suppresses false fault assertions from capacitor charging transients without external RC network. |
| Discharge Resistance | 100Ω - provides predictable RC-based VOUT decay (e.g., ~12ms for 120µF load) on disable. |
| Thermal Shutdown | 140°C trip with 25°C hysteresis - prevents permanent junction damage during prolonged overload. |
Pinout & Package
AP2191DWG-7 is packaged in U-DFN2018-6 (2.0mm × 1.8mm, 0.5mm pitch), featuring an exposed thermal pad that must be soldered to PCB ground for optimal θJA = 70°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power and signal reference ground; connects to thermal pad for heat dissipation. |
| 2 | IN | Main input supply pin (2.7V–5.5V); requires local 0.1µF ceramic bypass. |
| 3 | EN | Active-high enable control - logic high ≥2V enables switch; low ≤0.8V disables with discharge activation. |
| 4 | FLG | Open-drain fault indicator - pulled low during overcurrent or overtemperature; requires external pull-up. |
| 5, 6 | OUT | Switched output pins - must be tied together externally; drives downstream USB load with discharge path. |
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 power rail. |
| UVLO with Enable-Gated Activation | 1.9V typical lockout only engages when EN is high - ensures switch remains off until stable input is present. |
| 7ms Deglitched Fault Reporting | Hardware-blanked FLG assertion prevents false trips from capacitive inrush - no external timing components required. |
| Thermal Cycling Protection | 140°C shutdown + 25°C hysteresis enables safe auto-recovery mode during persistent faults - avoids latch-up. |
Applications
| USB 2.0 Port Power Control | Docking Station Load Switching |
|---|---|
|
Use Scenario: Managing power delivery to individual USB Type-A ports in multi-port hubs where hot-plug reliability is critical. IC Role / Device Role / Timing Role: High-side power switch with controlled turn-on/turn-off, current limiting, and fault reporting. Use Value: Prevents bus voltage collapse during plug-in by limiting inrush to <2.1A and suppressing false faults via 7ms FLG blanking. |
Use Scenario: Isolating auxiliary peripherals (e.g., Ethernet, HDMI, SD card) in laptop docking stations during insertion/removal. IC Role / Device Role / Timing Role: Hot-swap controller with discharge function and reverse-current blocking. Use Value: Ensures clean VOUT decay (<12ms for 120µF) on disconnect and blocks backfeed from powered peripherals into host system. |
| Laptop Internal USB Hub | Set-Top Box USB Peripheral Interface |
|
Use Scenario: Power gating internal USB 2.0 hubs behind the EC (Embedded Controller) in thin-and-light notebooks. IC Role / Device Role / Timing Role: Low-quiescent (1µA shutdown) load switch with thermal resilience. Use Value: Meets stringent system-level sleep current budgets while surviving sustained 1.5A loads at +85°C ambient. |
Use Scenario: Enabling/disabling USB-connected storage or streaming dongles in consumer set-top boxes. IC Role / Device Role / Timing Role: Protected power switch with UVLO and ESD-hardened I/O (4kV HBM). Use Value: Guarantees robust operation in uncontrolled user environments with frequent cable insertion and ESD exposure. |
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 |
|---|---|---|---|
| AP2181DWG-7 | Active-low EN pin; identical current limit, RDS(ON), and protection features. | Requires inverted enable logic from host MCU or PMIC; same thermal and layout footprint. | Select when system control logic uses active-low signaling or shares EN routing with legacy designs. |
| TCK112G,LF | 2.5A current limit, 65mΩ RDS(ON), 1.2ms rise time; no integrated discharge function. | Higher current capacity but requires external 10kΩ discharge resistor and pull-up on FLT pin. | Choose for higher-power USB-C or industrial hot-swap where lower conduction loss outweighs added BOM cost. |
Compared with AP2181DWG-7, the AP2191DWG-7 simplifies enable interface design with direct MCU GPIO compatibility; versus TCK112G, it trades marginally higher RDS(ON) for integrated discharge and tighter fault blanking - reducing component count and layout complexity in space-constrained USB 2.0 applications.
Availability
AP2191DWG-7 is available at Aetrix Electronics and suitable for USB 2.0 port power control, docking station load switching, and laptop internal hub applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AP2191DWG-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 AP2191D belongs to Diodes' USB Power Switch product line - engineered specifically for robust, low-component-count hot-swap implementation in USB 2.0-compliant systems with strict thermal and ESD requirements.
FAQ
What is the maximum continuous load current supported by AP2191DWG-7?
The AP2191DWG-7 is rated for 1.5A maximum continuous load current per the datasheet's Recommended Operating Conditions. This limit ensures safe operation within thermal constraints across the full -40°C to +85°C ambient range, even with its 90mΩ RDS(ON) in the U-DFN2018-6 package and 70°C/W θJA.
Does AP2191DWG-7 require external components for fault blanking or output discharge?
No. The AP2191DWG-7 integrates both functions: a hardware-based 7ms deglitch timer on the FLG pin eliminates false overcurrent reporting without external RC networks, and an internal 100Ω NMOS discharge path activates automatically when EN is de-asserted - removing the need for external resistors or MOSFETs.
How does the reverse current blocking feature operate?
Reverse current blocking is implemented via internal circuitry that detects VOUT > VIN when the switch is disabled. It actively prevents backflow from the output capacitor or powered peripheral into the input rail - critical for preventing unintended power injection in multi-rail systems or during hot-removal scenarios.
Can AP2191DWG-7 be used in USB 3.0 or USB-C applications?
The AP2191DWG-7 is specified and qualified for USB 2.0 compliance only. While its electrical specs (e.g., 5.5V max input, 2.1A limit) may appear compatible, it lacks the bandwidth, low-noise characteristics, and USB-IF certification required for USB 3.x signaling integrity or USB-C power delivery negotiation - use only in USB 2.0 data+power contexts.
AP2191DWG-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):
- 1.5A
- Rds On (Typ):
- 95mOhm
- Input Type:
- Non-Inverting
- Features:
- Load Discharge, 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
AP2191DWG-7 FAQ
1.How can I place an order for AP2191DWG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2191DWG-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 AP2191DWG-7 reliable?
The price and inventory of AP2191DWG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2191DWG-7 is usually 5 days.
3.What payment methods are accepted for AP2191DWG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2191DWG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2191DWG-7?
AP2191DWG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2191DWG-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 AP2191DWG-7?
For technical support, including AP2191DWG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2191DWG-7 requirements.
6.How does Aetrix verify that AP2191DWG-7 is sourced from the original manufacturer or authorized distributors?
All AP2191DWG-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 AP2191DWG-7 meets industry standards.
7.What is the process for return or replacement of AP2191DWG-7?
All AP2191DWG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2191DWG-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 AP2191DWG-7 part is unused and in its original packaging.
Return procedure for AP2191DWG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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