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Diodes Incorporated AP2181DFMG-7
- Part No.:
- AP2181DFMG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP2181DFMG-7.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,695
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Product details
Overview
AP2181DFMG-7 from Diodes Incorporated is a single-channel, active-low high-side USB power switch with integrated output discharge, 2.1A current limiting, 90mΩ RDS(ON) (U-DFN2018-6), and 7ms FLG deglitch - designed for hot-swap protection in USB 2.0-compliant ports on laptops, docking stations, and set-top boxes.
For engineers reviewing the AP2181DFMG-7 datasheet, AP2181DFMG-7 pinout, AP2181DFMG-7 application, or AP2181DFMG-7 equivalent, key selection criteria include enable polarity (active-low), thermal shutdown threshold (140°C), output discharge resistance (100Ω), and package-specific RDS(ON) performance across -40°C to +85°C ambient.
Technical Context
The AP2181DFMG-7 implements a thermally protected, slew-rate-controlled N-channel MOSFET high-side switch with UVLO (1.9V typ), reverse-current blocking, and open-drain FLG reporting. Its internal current-sense FET enables accurate 2.1A overcurrent limiting without external resistors.
It features a dedicated discharge NMOS (RDIS = 100Ω) activated upon EN deassertion, and a 7ms hardware deglitch on FLG to suppress false fault triggers during capacitive load turn-off transients - all without requiring external RC networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 2.1A typical - clamps output current during overload/short-circuit to prevent system-level damage |
| 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 brownout conditions |
| Enable Polarity | Active-low - compatible with standard logic-level microcontroller GPIOs without inversion |
| FLG Blanking Time | 7ms typical - eliminates false overcurrent flags caused by inrush into 120µF+ output capacitance |
| Shutdown Current | 1µA max - enables ultra-low-power state retention in battery-backed or always-on systems |
| Discharge Resistance | 100Ω - ensures rapid VOUT decay (<0.6ms to <0.5V with 10µF load) after disable |
Pinout & Package
AP2181DFMG-7 is packaged in a 6-pin U-DFN2018-6 (2.0mm × 1.8mm, 0.5mm pitch) with exposed thermal pad. The package supports high thermal efficiency (θJA = 70°C/W) when soldered to PCB ground plane via thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power and signal reference ground; must be connected to PCB ground plane |
| 2 | IN | Main input voltage supply (2.7V–5.5V); requires local 0.1µF ceramic bypass |
| 3 | EN | Active-low enable control; pulled high internally; logic-low ≤0.8V disables switch |
| 4 | FLG | Open-drain fault flag; sinks current when overcurrent or thermal fault occurs (7ms deglitch applied) |
| 5,6 | OUT | Switched output; pins internally paralleled; connects to load and output bulk capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Output Discharge | Integrated 100Ω NMOS discharge path reduces VOUT to <0.5V in ≤0.6ms after disable - prevents backfeed and meets USB hot-unplug requirements |
| Reverse Current Blocking | Active circuit blocks current flow from OUT to IN when VOUT > VIN and switch is off - eliminates need for external blocking diode |
| UVLO Threshold | 1.9V typical turn-on / 1.6V turn-off hysteresis - ensures reliable startup only after stable input rail, and safe shutdown during brownout |
| Thermal Protection | 140°C trip with 25°C hysteresis - forces cyclic shutdown/recovery under sustained overload, preventing permanent junction damage |
| ESD Robustness | 4kV HBM, 300V MM - withstands handling and board-level ESD events without latch-up or parametric shift |
Applications
| USB Hub Power Management | Laptop Docking Station Port Control |
|---|---|
|
Use Scenario: Individual USB port power control in multi-port hubs with independent overcurrent protection per port. IC Role / Device Role / Timing Role: High-side power switch enabling/disabling VBUS per port; provides current limiting, UVLO, and FLG fault reporting. Use Value: Prevents single-port short from collapsing entire hub VBUS; 7ms FLG deglitch avoids false trips during plug-in inrush. |
Use Scenario: Hot-plug detection and controlled power ramp for peripheral devices (e.g., monitors, storage) connected to laptop docking stations. IC Role / Device Role / Timing Role: Enables soft-start via 0.6ms typical rise time and discharge function to safely isolate peripherals before removal. Use Value: Eliminates arcing and system reset during hot insertion/removal; reverse-current blocking prevents backfeed into laptop power rail. |
| Set-Top Box USB Peripheral Interface | Smartphone/Tablet Charging Port Protection |
|
Use Scenario: USB-A port on IPTV set-top boxes powering external HDDs or Wi-Fi adapters with surge and short-circuit immunity. IC Role / Device Role / Timing Role: High-side switch with thermal foldback and 2.1A current limit protects downstream 5V rail from user-induced faults. Use Value: Sustains operation under 120µF load capacitance; FLG output drives MCU interrupt for firmware-level fault logging and recovery. |
Use Scenario: Secondary USB port on tablets used for OTG peripherals (keyboards, cameras) requiring robust overcurrent and thermal management. IC Role / Device Role / Timing Role: Active-low enable allows direct connection to application processor GPIO; discharge function clears VBUS before OTG role switch. Use Value: 1µA shutdown current extends battery life during idle; 90mΩ RDS(ON) limits voltage drop to <150mV at 1.5A load. |
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 |
|---|---|---|---|
| AP2191DFMG-7 | Same silicon, active-high EN pin instead of active-low; identical RDS(ON), current limit, and FLG behavior | Requires inverted logic drive or pull-down configuration; otherwise drop-in in layout and thermal design | Select when host MCU GPIO is actively driven high to enable - avoids need for external inverter |
| TCK112G,LF | 2.5A current limit, 65mΩ RDS(ON) (U-QFN2018-6), 1.2ms rise time, no integrated discharge function | Lacks output discharge; requires external 100Ω resistor + MOSFET or dedicated discharge IC for hot-unplug compliance | Choose for higher current margin and lower conduction loss where discharge is handled externally or not required |
Compared with AP2181DFMG-7, AP2191DFMG-7 offers identical protection and performance with reversed enable logic, while TCK112G,LF trades integrated discharge for lower RDS(ON) and higher current rating - making it suitable where discharge is managed separately.
Availability
AP2181DFMG-7 is available at Aetrix Electronics and suitable for USB 2.0 port protection, hot-swap docking interfaces, and consumer electronics power sequencing requiring stable component supply, RoHS-compliant green packaging, and production-ready traceability.
Supply support for AP2181DFMG-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 industrial, computing, and consumer markets.
The AP2181D/AP2191D product line delivers integrated high-side USB power switches with built-in protection - designed specifically for robust hot-plug operation in space-constrained, thermally demanding USB endpoints.
FAQ
What is the maximum continuous load current supported by AP2181DFMG-7?
The AP2181DFMG-7 is rated for 1.5A maximum continuous load current per Diodes' Recommended Operating Conditions. This value accounts for thermal derating across -40°C to +85°C ambient and ensures reliable operation within the 90mΩ RDS(ON) and 70°C/W θJA limits of the U-DFN2018-6 package.
Does AP2181DFMG-7 require external components for overcurrent fault debouncing?
No. The AP2181DFMG-7 integrates a 7ms hardware deglitch circuit on the FLG pin, eliminating the need for external RC networks. This blanking time suppresses false overcurrent reports caused by transient inrush into large output capacitors (e.g., 120µF), as verified in Diodes' DS32251 Rev. 4-2 Figure 6.
How does the output discharge function operate, and what is its design impact?
When EN is de-asserted, an internal 100Ω NMOS connects OUT to GND, discharging external load capacitance. With a 10µF capacitor, VOUT falls below 0.5V in ≤0.6ms. This prevents backfeed, satisfies USB hot-unplug specifications, and avoids latch-up in downstream circuits during removal.
Can AP2181DFMG-7 be used in dual-role USB ports (e.g., charging + data)?
No. Diodes explicitly advises against using AP2181D/AP2191D in dual-purpose ports like shared HDMI/MHL or USB-C DRP applications where simultaneous data communication and battery charging occur. Its architecture lacks the bidirectional control and voltage negotiation logic required for such use cases.
AP2181DFMG-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:
- 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:
- U-DFN2018-6
AP2181DFMG-7 FAQ
1.How can I place an order for AP2181DFMG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2181DFMG-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 AP2181DFMG-7 reliable?
The price and inventory of AP2181DFMG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2181DFMG-7 is usually 5 days.
3.What payment methods are accepted for AP2181DFMG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2181DFMG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2181DFMG-7?
AP2181DFMG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2181DFMG-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 AP2181DFMG-7?
For technical support, including AP2181DFMG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2181DFMG-7 requirements.
6.How does Aetrix verify that AP2181DFMG-7 is sourced from the original manufacturer or authorized distributors?
All AP2181DFMG-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 AP2181DFMG-7 meets industry standards.
7.What is the process for return or replacement of AP2181DFMG-7?
All AP2181DFMG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2181DFMG-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 AP2181DFMG-7 part is unused and in its original packaging.
Return procedure for AP2181DFMG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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