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Diodes Incorporated AP2181DM8G-13
- Part No.:
- AP2181DM8G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AP2181DM8G-13.pdf
- Description:
- IC PWR SWITCH P-CHAN 1:1 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,823
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Product details
Overview
AP2181DM8G-13 from Diodes Incorporated is an active-low-enable, single-channel, 1.5A high-side USB power switch with integrated output discharge, 90mΩ RDS(ON), 2.1A current limiting, and 7ms deglitched fault reporting - designed for hot-swap USB 2.0 ports in laptops, docking stations, and HUBs.
For engineers reviewing the AP2181DM8G-13 datasheet, AP2181DM8G-13 pinout, AP2181DM8G-13 application, or AP2181DM8G-13 equivalent, key selection criteria include enable polarity (active-low), thermal shutdown threshold (140°C), output discharge resistance (100Ω), and SO-8 package compatibility with USB port power sequencing requirements.
Technical Context
The AP2181D implements a thermally protected, slew-rate-controlled N-channel MOSFET gate driver with UVLO (1.9V typ), reverse-current blocking, and internal current-sense FET-based overcurrent detection. Its deglitched open-drain FLG output asserts low after 7ms blanking upon overcurrent or overtemperature events.
It operates across 2.7V–5.5V input, delivers 0.6ms typical rise time into 10Ω/1µF load, and maintains <1µA shutdown current. The device uses internal discharge NMOS (RDIS = 100Ω) to actively pull OUT to GND when disabled - eliminating external discharge circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit (Typ) | 2.1A - clamps output during overload without latch-off; enables safe hot-plug insertion into loaded USB ports |
| RDS(ON) (25°C) | 90mΩ (U-DFN2018-6) - 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 degraded or battery-backed supplies |
| Enable Polarity | Active Low - matches common system-level reset or enable logic where low = ON (e.g., USB VBUS control) |
| FLG Blanking Time | 7ms typ - suppresses false fault triggers from inrush or capacitive load transients without external RC network |
| Output Discharge R | 100Ω - discharges 120µF load to <0.5V in ~0.6ms; prevents backfeed and ensures clean port reset |
| UVLO Threshold | 1.9V typ - prevents turn-on until stable USB supply is established; avoids brownout-induced misbehavior |
Pinout & Package
AP2181DM8G-13 is supplied in SO-8 package (JEDEC MS-012AC) with exposed pad optional per MSOP-8EP variant; pinout matches standard SO-8 footprint with NC on Pin 8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Primary thermal and electrical return path; must be connected to PCB ground plane |
| IN (Pins 2,3) | Input voltage supply | Dual-pin configuration reduces trace inductance; both pins must be shorted externally |
| EN (Pin 4) | Active-low enable control | Pulled low to activate switch; high-Z when floating; compatible with 3.3V/5V logic |
| FLG (Pin 5) | Open-drain fault indicator | Asserts low on overcurrent or overtemperature; requires external pull-up (e.g., 10kΩ to VIN) |
| OUT (Pins 6,7) | Switched output | Dual-pin layout lowers output impedance; both pins must be shorted to load |
| NC (Pin 8) | No internal connection | May be tied to OUT for mechanical stability; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Integrated output discharge | 100Ω internal NMOS discharges output capacitor on disable - eliminates need for external bleed resistor |
| Reverse current blocking | Prevents backflow from OUT to IN when switch is off - critical for multi-rail USB systems with shared VBUS |
| Thermal shutdown with hysteresis | Triggers at 140°C; resets at ~115°C - prevents oscillation and enables self-recovery after transient overload |
| UVLO with enable gating | Only active when EN is asserted - ensures switch remains off during power ramp-up, even if EN is held high |
| ESD robustness | 4kV HBM / 300V MM - meets IEC 61000-4-2 level 4 for USB-facing interfaces |
Applications
| USB 2.0 Port Power Control | Laptop Docking Station VBUS Switching |
|---|---|
|
Use Scenario: Controlling power delivery to downstream USB peripherals during hot-plug insertion. IC Role / Device Role / Timing Role: High-side power switch with controlled 0.6ms rise time and UVLO-enforced safe startup. Use Value: Prevents inrush current spikes >2A and ensures VBUS ramps cleanly before enumeration begins. |
Use Scenario: Isolating host-side VBUS from peripheral-side loads in multi-port docking stations. IC Role / Device Role / Timing Role: Active-low-enabled switch with reverse-current blocking and FLG fault reporting. Use Value: Eliminates backfeed from powered peripherals into host controller; FLG alerts system MCU of overcurrent events. |
| Desktop PC Front-Panel USB Hub | Set-Top Box USB Peripheral Interface |
|
Use Scenario: Managing power to front-panel USB ports subject to frequent cable insertion/removal. IC Role / Device Role / Timing Role: Thermal-protected, current-limited switch with 7ms deglitched FLG output. Use Value: Suppresses false faults from capacitive load transients; sustains 1.5A continuous load without derating. |
Use Scenario: Providing isolated, protected VBUS to USB-connected storage or streaming dongles in STB designs. IC Role / Device Role / Timing Role: Single-channel USB power switch with output discharge for clean port reset. Use Value: Ensures rapid VBUS discharge (<1ms for 100µF) between device swaps - prevents enumeration conflicts. |
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 |
|---|---|---|---|
| TUSB2036IRHBR | USB 2.0 transceiver + hub controller IC; includes integrated 1.5A power switch but adds PHY and protocol logic | Requires full USB protocol stack support; not a drop-in replacement for standalone power switching | Select only when USB hub functionality (addressing, packet routing) is required alongside power control |
| TPS2051BDBVR | Active-high-enable, 1.5A USB power switch; 110mΩ RDS(ON); no integrated output discharge | Lacks internal discharge path - requires external 100Ω resistor and transistor for equivalent reset behavior | Choose when enable polarity matches system logic and board space allows discrete discharge circuit |
Compared with TUSB2036IRHBR and TPS2051BDBVR, AP2181DM8G-13 provides dedicated active-low USB power switching with built-in discharge and tighter current limit accuracy (±5% vs ±15%), reducing BOM count and simplifying USB port design for embedded host applications.
Availability
AP2181DM8G-13 is available at Aetrix Electronics and suitable for USB 2.0 port management, laptop docking station power distribution, and set-top box peripheral interface applications requiring stable component supply and long-term industrial availability.
Supply support for AP2181DM8G-13 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 consumer, computing, and industrial markets.
The AP2181D belongs to Diodes' USB power switch product line, engineered specifically for reliable hot-swap operation in USB 2.0-compliant host and peripheral equipment with minimal external components.
FAQ
What is the maximum continuous load current supported by AP2181DM8G-13?
The AP2181DM8G-13 is rated for 1.5A maximum continuous load current under recommended operating conditions (TA ≤ +85°C, proper PCB thermal layout). Its 2.1A current limit is a trip threshold - sustained operation above 1.5A risks thermal shutdown depending on ambient temperature and copper area.
Does AP2181DM8G-13 require external components for output discharge?
No. AP2181DM8G-13 integrates a 100Ω discharge NMOS that activates automatically when EN is de-asserted. This discharges typical USB output capacitance (e.g., 120µF) to <0.5V in approximately 0.6ms - eliminating need for external resistors or transistors.
How does the 7ms FLG deglitch function impact system fault response?
The 7ms deglitch window prevents FLG from asserting on brief inrush or capacitive transients. Fault reporting only occurs if overcurrent or overtemperature persists beyond 7ms - ensuring reliable detection of genuine faults while ignoring benign startup events.
Can AP2181DM8G-13 be used in USB-C applications?
AP2181DM8G-13 is specified for USB 2.0 (5V-only) applications and lacks USB-C-specific features such as CC logic, VCONN support, or 20V tolerance. It may serve as a VBUS switch in legacy USB-C receptacles supporting only USB 2.0 data, but is not compliant with USB Type-C specification.
AP2181DM8G-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 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:
- 8-MSOP
AP2181DM8G-13 FAQ
1.How can I place an order for AP2181DM8G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2181DM8G-13 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 AP2181DM8G-13 reliable?
The price and inventory of AP2181DM8G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2181DM8G-13 is usually 5 days.
3.What payment methods are accepted for AP2181DM8G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2181DM8G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2181DM8G-13?
AP2181DM8G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2181DM8G-13 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 AP2181DM8G-13?
For technical support, including AP2181DM8G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2181DM8G-13 requirements.
6.How does Aetrix verify that AP2181DM8G-13 is sourced from the original manufacturer or authorized distributors?
All AP2181DM8G-13 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 AP2181DM8G-13 meets industry standards.
7.What is the process for return or replacement of AP2181DM8G-13?
All AP2181DM8G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2181DM8G-13, 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 AP2181DM8G-13 part is unused and in its original packaging.
Return procedure for AP2181DM8G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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