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Diodes Incorporated AP2161WG-7
- Part No.:
- AP2161WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2161WG-7.pdf
- Description:
- IC PWR SWITCH P-CHAN 1:1 SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:83,861
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Product details
Overview
AP2161WG-7 from Diodes Incorporated is a single-channel, active-low enable, current-limited high-side power switch optimized for USB 2.0 hot-swap applications. It delivers 1.5A accurate current limiting, 95mΩ RDS(ON) at +25°C, reverse current blocking, and integrated short-circuit/thermal protection with 7ms deglitch on the open-drain FLG output. Used in laptop USB ports and self-powered hubs to enforce compliance and prevent bus overloads.
For engineers reviewing the AP2161WG-7 datasheet, AP2161WG-7 pinout, AP2161WG-7 application, or AP2161WG-7 equivalent, key selection criteria include enable polarity (active-low), thermal shutdown threshold (+140°C), UVLO trip (1.9V typ), low shutdown current (1µA max), and SOT25 package compatibility with space-constrained USB load-switch designs.
Technical Context
The AP2161WG-7 implements a MOSFET-based high-side switch with internal current-sense FET architecture-eliminating external sense resistors while maintaining precise 1.5A current limiting across -40°C to +85°C. Its deglitched FLG output asserts low only after sustained overcurrent or thermal fault detection, preventing false trips during capacitive inrush.
UVLO ensures switch disable below 1.9V input, supporting safe hot-insertion; controlled 0.6ms rise time limits dI/dt during power-up; and reverse current blocking prevents backfeed when output voltage exceeds input-critical for multi-rail USB systems with shared VBUS domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 1.5A typical - clamps output current precisely to protect downstream USB loads and upstream power rail during overload |
| RDS(ON) | 95mΩ at +25°C (SOT25) - minimizes conduction loss and self-heating under 1A continuous load |
| Input Voltage Range | 2.7V–5.5V - supports full USB 2.0 VBUS tolerance and operation from 3.3V auxiliary rails |
| Enable Polarity | Active-low - directly interfaces with standard USB controller GPIOs without level-shifting |
| FLG Blanking Time | 7ms typical - suppresses transient inrush-induced false faults without external RC filtering |
| Shutdown Current | 1µA maximum - enables ultra-low-power standby in battery-backed or always-on USB host systems |
| UVLO Threshold | 1.9V typical - guarantees switch remains off during brown-out or incomplete power ramp-up |
Pinout & Package
SOT25 (5-pin, surface-mount) package with exposed pad thermally connected to GND; compact footprint ideal for USB port-level integration on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Power output | Switched VBUS output; pins 1 and 5 are internally paralleled - must be tied together externally |
| 2 IN | Power input | Main VBUS input (2.7–5.5V); pins 2 and 5 are internally paralleled - must be tied together externally |
| 3 GND | Ground reference | Analog and power ground; connects to exposed pad for thermal dissipation |
| 4 EN | Enable control | Active-low logic input; pulls low to enable switch; high-Z when disabled |
| 5 FLG | Fault reporting | Open-drain flag; sinks current when overcurrent or thermal fault persists >7ms |
Key Features
| Feature | Design Value |
|---|---|
| Reverse current blocking | Prevents backfeed from powered peripherals into disabled host VBUS, eliminating need for external blocking diode |
| Integrated thermal shutdown | +140°C trip with +25°C hysteresis - autonomously cycles power during sustained short-circuit without latch-up or damage |
| Controlled rise/fall time | 0.6ms typical turn-on, 0.05ms turn-off - limits inrush dI/dt while enabling fast fault recovery |
| ESD robustness | 4kV HBM - withstands handling and board-level ESD events common in consumer electronics assembly |
| Green packaging | Halogen- and antimony-free, lead-free, RoHS-compliant molding compound - meets global environmental compliance mandates |
Applications
| USB 2.0 Host Port Protection | Self-Powered USB Hub |
|---|---|
|
Use Scenario: Single downstream USB port on a laptop motherboard requiring overcurrent protection and hot-plug compliance. IC Role / Device Role: High-side VBUS switch enforcing USB 2.0 current-limiting and fault reporting to host controller via FLG. Use Value: Eliminates need for discrete current-sense resistor and comparator; reduces BOM count and layout area by 30% vs discrete solution. |
Use Scenario: Downstream port on a desktop PC-connected USB hub where each port must independently report overcurrent to the hub controller. IC Role / Device Role: Independent per-port power switch with deglitched FLG output synchronized to USB enumeration timing. Use Value: Enables individual port disable without affecting other ports; supports USB specification's per-port current monitoring requirement. |
| Hot-Swap Module Power Control | USB-C Alternate Mode Load Switch |
|
Use Scenario: Removable expansion module inserted into a powered industrial controller, requiring inrush current limiting and safe insertion detection. IC Role / Device Role: Controlled power ramp generator using UVLO and rise-time regulation to limit surge during mechanical mating. Use Value: Prevents system reset or brown-out during hot-plug; eliminates need for external soft-start circuitry or sequencers. |
Use Scenario: USB-C port implementing DisplayPort Alt Mode, where VBUS must remain stable during video handshake while isolating faulty sink devices. IC Role / Device Role: Isolation switch between source VBUS and Alt Mode sink, blocking reverse current during DP link training failures. Use Value: Maintains VBUS integrity during DP AUX channel negotiation; prevents sink-side faults from collapsing host power rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-limited power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2171WG-7 | Active-high enable; identical current limit, RDS(ON), and protection features | Requires inverted enable signal from host controller; no change to fault reporting or thermal behavior | Select when host GPIO drives high to enable - avoids external inverter in new designs |
| TCK112G,LF | 1.2A current limit, 120mΩ RDS(ON), 1ms rise time, same SOT25 package | Lacks deglitched FLG; uses simple open-drain fault flag without blanking | Choose for cost-sensitive applications where 7ms deglitch is not required and 1.2A limit suffices |
Compared with AP2171WG-7, the AP2161WG-7 offers direct GPIO compatibility with active-low controllers; versus TCK112G, it provides superior inrush immunity and more precise current limiting-critical for USB 2.0 compliance and robust hot-swap operation.
Availability
AP2161WG-7 is available at Aetrix Electronics and suitable for USB 2.0 host ports, self-powered USB hubs, and hot-swap module power control requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP2161WG-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 power management, signal integrity, and protection solutions for high-volume consumer and industrial markets.
The AP2161/AP2171 family was designed specifically for USB 2.0-compliant hot-swap power switching-delivering integrated protection, precise current limiting, and compact packaging for space-constrained portable and computing platforms.
FAQ
What is the maximum continuous load current supported by AP2161WG-7?
The AP2161WG-7 is rated for 1.0A maximum continuous load current per the manufacturer's recommended operating conditions, despite its 1.5A current-limit threshold. This derating ensures reliable thermal performance in SOT25 packages at +85°C ambient, accounting for PCB copper area, airflow, and duty cycle in real-world USB port implementations.
Does AP2161WG-7 require external components for basic operation?
No external components are required for core switching functionality. A 0.1µF ceramic capacitor between IN and GND is recommended for stability, and a 120µF output capacitor improves inrush handling-but neither is mandatory for enable/disable operation 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 until the overcurrent condition persists beyond the 7ms deglitch timeout. Once asserted low, FLG stays low until both overcurrent and thermal faults clear. It does not pulse or auto-recover-ensuring host firmware receives unambiguous, debounced fault signaling.
Can AP2161WG-7 be used in USB-C applications?
Yes, but only for legacy USB 2.0 data path power switching-not for full USB-C PD negotiation. It supports VBUS switching in USB-C receptacles implementing USB 2.0 Alt Modes (e.g., HDMI, MHL), provided reverse current blocking and 5.5V absolute max rating align with system requirements; PD communication must be handled separately.
AP2161WG-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):
- 1A
- Rds On (Typ):
- 95mOhm
- Input Type:
- 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:
- SOT-25
AP2161WG-7 FAQ
1.How can I place an order for AP2161WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2161WG-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 AP2161WG-7 reliable?
The price and inventory of AP2161WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2161WG-7 is usually 5 days.
3.What payment methods are accepted for AP2161WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2161WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2161WG-7?
AP2161WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2161WG-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 AP2161WG-7?
For technical support, including AP2161WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2161WG-7 requirements.
6.How does Aetrix verify that AP2161WG-7 is sourced from the original manufacturer or authorized distributors?
All AP2161WG-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 AP2161WG-7 meets industry standards.
7.What is the process for return or replacement of AP2161WG-7?
All AP2161WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2161WG-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 AP2161WG-7 part is unused and in its original packaging.
Return procedure for AP2161WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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