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Diodes Incorporated AP2151FMG-7
- Part No.:
- AP2151FMG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP2151FMG-7.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:11,067
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Product details
Overview
AP2151FMG-7 from Diodes Incorporated is a single-channel, active-high enable, current-limited high-side power switch optimized for USB 2.0-compliant hot-swap applications. It delivers 0.5A continuous load current with 90mΩ typical RDS(ON) (U-DFN2018-6 package), 0.8A accurate current limiting, and integrated short-circuit/thermal protection. Used in laptop USB ports and docking stations to manage inrush, prevent bus faults, and report over-current via open-drain FLG.
For engineers reviewing the AP2151FMG-7 datasheet, AP2151FMG-7 pinout, AP2151FMG-7 application, or AP2151FMG-7 equivalent, this page provides verified functional context, package-specific electrical behavior, thermal derating guidance, and real-world USB port implementation constraints - including UVLO threshold stability, 7ms FLG deglitch timing, and reverse current blocking capability.
Technical Context
The AP2151FMG-7 implements a thermally protected N-channel MOSFET high-side switch with internal current-sense FET architecture - eliminating external sense resistors while maintaining <±10% current-limit accuracy across -40°C to +85°C. Its UVLO circuit asserts at 1.9V (typ) and releases at 2.5V (max), ensuring clean turn-on during hot-insertion sequences.
It integrates a 7ms deglitch timer on the open-drain FLG output to suppress false fault reporting during capacitive load transients, and features active-high EN logic compatible with standard USB host controller GPIOs. The U-DFN2018-6 package provides 70°C/W θJA with exposed pad thermal connection to PCB ground plane.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit (Typ) | 0.8A - clamps sustained overload before thermal shutdown; supports 500mA continuous USB port loads with margin. |
| RDS(ON) (U-DFN) | 90mΩ @ 25°C - enables <0.225W dissipation at 500mA, critical for compact USB hub thermal design. |
| VIN Range | 2.7V to 5.5V - matches USB VBUS tolerance and supports legacy 3.3V auxiliary rails. |
| tR (Rise Time) | 0.6ms (typ) - controls inrush di/dt to limit peak surge current during hot-plug insertion. |
| FLG Blanking | 7ms (typ) - filters transient over-current events from bulk capacitor charging without external RC. |
| Shutdown Current | 1µA (max) - minimizes standby power loss in always-on USB host systems. |
| UVLO Threshold | 1.9V (typ) - prevents erratic switching during brown-out or partial power-up of USB host supplies. |
Pinout & Package
AP2151FMG-7 is housed in a 2.0mm × 1.8mm U-DFN2018-6 package with wettable flank leads and an exposed thermal pad (EP) that must be soldered to PCB GND for thermal performance. The EP is not an electrical ground path but reduces θJA to 70°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FLG) | Open-drain fault flag | Active-low signal asserted after 7ms deglitch upon over-current or over-temperature; requires external pull-up. |
| 2 (EN) | Enable input | Active-high logic: drives high (>2V) to enable switch; pulled low to disable and block reverse current. |
| 3 (GND) | Power ground reference | Primary return path for internal current-sense circuitry and thermal sensor; connects to EP via PCB copper. |
| 4 (IN) | Input voltage supply | Accepts 2.7–5.5V; all IN pins internally tied - external routing must minimize impedance to reduce noise coupling. |
| 5,6 (OUT) | Switched output | Dual-source terminals tied internally; connect directly to USB port VBUS line; supports reverse current blocking when disabled. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse current blocking | Prevents backfeed from powered downstream devices into host supply when EN = low - essential for USB OTG and dual-role ports. |
| Integrated 7ms deglitch | Eliminates need for external RC filter on FLG, reducing BOM count and PCB area in space-constrained USB modules. |
| Thermal shutdown with hysteresis | Shuts down at +140°C (TSHDN) and auto-recovers after +25°C cooldown - enables safe fault cycling without latch-up. |
| Low RDS(ON) in U-DFN2018-6 | 90mΩ max at 25°C enables 500mA operation in 3.6mm² footprint - ideal for ultra-thin laptops and dongles. |
| USB 2.0 compliance | Meets USB-IF electrical requirements for current limiting, rise time, and fault reporting latency - simplifies certification. |
Applications
| USB 2.0 Host Port Protection | Laptop Docking Station Power Control |
|---|---|
|
Use Scenario: Protecting individual USB Type-A ports on a Windows laptop motherboard against short circuits and hot-plug surges. IC Role / Device Role / Timing Role: High-side power switch with controlled 0.6ms rise time and 7ms FLG deglitch ensures clean enumeration and prevents host controller reset. Use Value: Enables robust port-level fault isolation without sacrificing USB 2.0 signaling integrity or requiring external current-sense components. |
Use Scenario: Managing power delivery to USB peripherals (keyboard, mouse, Ethernet adapter) connected via a Thunderbolt/USB-C dock. IC Role / Device Role / Timing Role: Active-high enable synchronizes with dock MCU's power sequencing; reverse current blocking isolates dock's internal 5V rail from laptop VBUS. Use Value: Eliminates risk of backfeed damage during undocking and supports USB Battery Charging (BC1.2) negotiation by maintaining stable VBUS ramp. |
| Set-Top Box USB Peripheral Hub | Industrial USB I/O Module |
|
Use Scenario: Providing isolated 5V power to USB-connected storage drives or wireless adapters in cable/satellite STBs operating at -20°C to +70°C ambient. IC Role / Device Role / Timing Role: Thermal shutdown at +140°C protects against sustained overload from failing HDDs; UVLO ensures no false turn-on during cold start. Use Value: Guarantees field reliability under uncontrolled peripheral insertion and meets IEC60950-1 CB Scheme safety certification requirements. |
Use Scenario: Controlling power to USB-connected sensors or actuators in factory automation gateways where ESD immunity and long-term thermal stability are critical. IC Role / Device Role / Timing Role: 15kV IEC61000-4-2 ESD protection (with external capacitance) and 4kV HBM rating protect against industrial ESD events near machinery. Use Value: Reduces need for external TVS diodes and enables direct integration into DIN-rail mounted controllers with minimal layout overhead. |
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 | 3-port USB 2.0 hub IC with integrated power switches; includes USB transceivers and serial EEPROM interface. | Designed for full hub functionality (repeater, transaction translator); not a discrete switch. | Select only if full hub logic + power control is required - adds complexity and cost versus standalone switch. |
| TPS2051BDBVR | 0.5A single-channel high-side switch with 110mΩ RDS(ON), 2.7–5.5V range, but no integrated FLG deglitch or reverse blocking. | Lacks 7ms blanking and reverse current blocking - requires external circuitry for robust USB fault handling. | Choose only for non-USB applications where FLG filtering and backfeed prevention are unnecessary. |
Compared with TUSB2036IRHBR and TPS2051BDBVR, the AP2151FMG-7 uniquely combines USB-optimized timing (0.6ms tR, 7ms FLG blanking), reverse current blocking, and U-DFN2018-6 thermal efficiency - making it the most direct fit for discrete, space-constrained, safety-certified USB port protection.
Availability
AP2151FMG-7 is available at Aetrix Electronics and suitable for USB 2.0 host port protection, laptop docking station power control, and industrial USB I/O modules requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.
Supply support for AP2151FMG-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 AP2151 belongs to Diodes' USB Power Switch product line - engineered specifically for USB 2.0-compliant hot-swap and over-current protection in space- and thermal-constrained portable and embedded systems.
FAQ
What is the maximum continuous output current supported by AP2151FMG-7?
The AP2151FMG-7 is rated for 0.5A continuous load current per the Recommended Operating Conditions table. Although its current limit is 0.8A (typ), sustained operation above 0.5A requires careful thermal design due to RDS(ON) derating and θJA = 70°C/W in the U-DFN2018-6 package. At 0.5A and 25°C ambient, junction temperature rise is ~17.5°C - well within the +150°C absolute max.
Does AP2151FMG-7 support reverse current blocking when disabled?
Yes. When EN is low, the internal MOSFET is fully off and blocks reverse current flow from OUT to IN - a key requirement for USB On-The-Go (OTG) and dual-role ports. This is confirmed in the datasheet's "Reverse Current Blocking" feature and Electrical Characteristics table (IREV = 1µA max at VOUT = 5V, VIN = 0V).
How does the 7ms FLG deglitch function interact with USB inrush currents?
The 7ms deglitch window prevents FLG assertion during normal USB port capacitor charging transients (e.g., 10–100µF bulk caps). Only sustained over-current events exceeding 500mA for >7ms trigger FLG - matching USB-IF's definition of valid fault conditions and avoiding false interrupts during device enumeration.
Can AP2151FMG-7 be used in USB-C applications?
No. The AP2151FMG-7 is specified only for USB 2.0 applications and lacks support for USB-C's 3A/5A current levels, CC logic detection, or VCONN power. It may be used on legacy USB-A ports within a USB-C system, but not on the USB-C receptacle itself or for PD communication paths.
AP2151FMG-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):
- 500mA
- 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
AP2151FMG-7 FAQ
1.How can I place an order for AP2151FMG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2151FMG-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 AP2151FMG-7 reliable?
The price and inventory of AP2151FMG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2151FMG-7 is usually 5 days.
3.What payment methods are accepted for AP2151FMG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2151FMG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2151FMG-7?
AP2151FMG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2151FMG-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 AP2151FMG-7?
For technical support, including AP2151FMG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2151FMG-7 requirements.
6.How does Aetrix verify that AP2151FMG-7 is sourced from the original manufacturer or authorized distributors?
All AP2151FMG-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 AP2151FMG-7 meets industry standards.
7.What is the process for return or replacement of AP2151FMG-7?
All AP2151FMG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2151FMG-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 AP2151FMG-7 part is unused and in its original packaging.
Return procedure for AP2151FMG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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