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Diodes Incorporated AP2151AFM-7
- Part No.:
- AP2151AFM-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP2151AFM-7.pdf
- Description:
- IC PWR SWITCH P-CHAN 1:1 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,375
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Product details
Overview
AP2151AFM-7 from Diodes Incorporated is a single-channel, active-high, current-limited high-side power switch optimized for USB 2.0 and hot-swap applications. It delivers 0.5A continuous load current with 90mΩ typical RDS(ON) at 5V input, integrated 7ms deglitch FLG output, and operates across 2.7V–5.5V input range. It provides reverse current blocking, thermal shutdown at +140°C, and UVLO at 1.9V - deployed in consumer LCD monitors, USB hubs, and docking stations.
For engineers reviewing the AP2151AFM-7 datasheet, AP2151AFM-7 pinout, AP2151AFM-7 application, or AP2151AFM-7 equivalent, this page details its SO-8/MSOP-8EP/SOT25/U-DFN2018-6 package variants, current-limiting behavior under short-circuit conditions, thermal recovery hysteresis (+25°C), and FLG timing characteristics critical for fault-reporting system design.
Technical Context
The AP2151AFM-7 integrates a low-RDS(ON) N-channel MOSFET with precision current sensing via internal sense FET (no external resistor), enabling accurate 0.8A current limiting without added series resistance. Its UVLO circuit ensures turn-on only above 1.9V and immediate turn-off below that threshold - essential for stable hot-plug sequencing.
Thermal protection uses die-temperature sensing to disable the switch at +140°C with +25°C hysteresis, allowing automatic recovery after cooling. The open-drain FLG output asserts low after 7ms blanking time upon over-current or over-temperature events - eliminating false triggers from capacitive inrush without external RC filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit (Typical) | 0.8A - sets maximum sustained output current before entering constant-current mode during overload |
| RDS(ON) (TA = +25°C, VIN = 5V) | 90mΩ - enables <100mW conduction loss at 0.5A, reducing thermal stress in U-DFN2018-6 package |
| Input Voltage Range | 2.7V to 5.5V - supports full USB 2.0 bus voltage tolerance and compatibility with 3.3V/5V system rails |
| FLG Blanking Time | 7ms (typ) - suppresses transient inrush-induced false faults when driving ≥22µF output capacitance |
| UVLO Threshold | 1.9V (typ) - prevents erratic switching during brown-out or hot-insertion ramp-up, ensuring clean enable sequencing |
| Shutdown Current | 1µA (max) - minimizes standby power draw in battery-backed or always-on USB peripheral systems |
| Thermal Shutdown Temp | +140°C - protects internal MOSFET under sustained short-circuit; +25°C hysteresis enables self-recovery |
Pinout & Package
AP2151AFM-7 is packaged in U-DFN2018-6: 2.0mm × 1.8mm, 0.5mm pitch, exposed thermal pad (must be connected to PCB GND plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Primary return path for power and logic; connects to exposed thermal pad for enhanced heat dissipation |
| 2 - IN | Power input | Accepts 2.7V–5.5V supply; all IN pins must be externally tied together in multi-pin packages |
| 3 - EN | Enable control | Active-high digital input; drives internal driver stage; VIH ≥2×VIN required for guaranteed turn-on |
| 4 - FLG | Fault reporting | Open-drain output pulled low after 7ms deglitch on over-current or over-temperature event |
| 5,6 - OUT | Switched output | Delivers regulated current to load; both pins must be externally tied together; reverse-current blocking enabled |
Key Features
| Feature | Design Value |
|---|---|
| Controlled rise time | 0.6ms typical - limits inrush di/dt to protect upstream source and downstream capacitors during hot-plug |
| Reverse current blocking | Enabled by internal architecture - prevents backfeed from loaded OUT to IN when device is disabled or powered off |
| No external components for FLG debouncing | Integrated 7ms deglitch - eliminates need for external RC filter, saving board space and BOM cost |
| ESD robustness | 15kV IEC 61000-4-2 (with external capacitance) - withstands real-world handling and system-level ESD events |
| Green packaging | Halogen- and antimony-free, lead-free, RoHS 3 compliant - meets global environmental compliance requirements |
Applications
| USB 2.0 Port Power Switching | Hot-Swap Module Protection |
|---|---|
|
Use Scenario: Single-port USB host or self-powered hub supplying 5V to downstream peripherals. IC Role / Device Role / Timing Role: High-side power switch controlling VBUS delivery; enables/disables per-port power under USB controller command. Use Value: Provides over-current reporting via FLG to USB controller, complies with USB 2.0 current-limiting requirements, and blocks reverse current during disconnect. |
Use Scenario: Insertion of expansion cards or daughterboards into live backplanes (e.g., industrial PC add-in modules). IC Role / Device Role / Timing Role: Inrush current limiter and soft-start controller; ramps output voltage over ~0.6ms to limit peak surge current. Use Value: Prevents system rail droop and contact arcing during insertion; UVLO ensures automatic disable when card is removed. |
| Dual-Purpose HDMI/MHL Charging Port | Laptop Docking Station Power Management |
|
Use Scenario: Shared port delivering video (HDMI/MHL) and simultaneous charging to mobile devices. IC Role / Device Role / Timing Role: Isolates charging path from data lines; enables VBUS only after host confirms port readiness. Use Value: Ensures safe 5V delivery prior to battery charging initiation; reverse-blocking prevents discharge through host during sleep. |
Use Scenario: Power distribution to multiple peripherals (USB, Ethernet, DisplayPort) from a laptop docking station. IC Role / Device Role / Timing Role: Independent channel switch per peripheral; coordinated enable/disable via system MCU. Use Value: Enables per-port power cycling without resetting entire dock; thermal shutdown protects against sustained cable shorts. |
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 |
|---|---|---|---|
| AP2151AS-13 | SO-8 package (θJA = 110°C/W); higher thermal resistance than U-DFN2018-6 (θJA = 70°C/W) | Better suited for prototyping or lower-power applications where board space allows larger footprint | Select when manual soldering, legacy layout reuse, or higher thermal margin at lower ambient is prioritized |
| TCK107AG,TL | Lower 0.6A current limit; 130mΩ RDS(ON); no UVLO; 10ms FLG blanking | Lacks USB-compliant UVLO and tighter current accuracy; intended for general-purpose load switching | Choose only if USB 2.0 compliance is not required and board-level UVLO is implemented externally |
Compared with AP2151AS-13, the AP2151AFM-7 offers superior thermal performance in space-constrained designs; versus TCK107AG,TL, it delivers stricter USB 2.0 compliance, tighter current limit accuracy, and integrated UVLO - making it the preferred choice for certified USB and hot-swap applications.
Availability
AP2151AFM-7 is available at Aetrix Electronics and suitable for USB 2.0 hubs, laptop docking stations, and consumer display power management requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for AP2151AFM-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 AP2151A product line targets USB-compliant, space-efficient hot-swap power distribution - designed specifically for single-port current limiting, reverse-blocking, and fault reporting in compact portable and embedded systems.
FAQ
What is the maximum continuous output current rating for AP2151AFM-7?
The AP2151AFM-7 is rated for 0.5A maximum continuous load current per Diodes' Recommended Operating Conditions. Although its current-limit threshold is 0.8A (typ), sustained operation above 0.5A requires careful thermal design due to power dissipation in the U-DFN2018-6 package - especially at elevated ambient temperatures or with limited PCB copper area.
Does AP2151AFM-7 require external components for FLG output debouncing?
No. The AP2151AFM-7 integrates a 7ms deglitch timer on the FLG pin, eliminating the need for external RC filters. This internal blanking window suppresses false fault reports caused by capacitive inrush transients - confirmed in the datasheet's Typical Performance Characteristics and Application Information sections.
How does reverse current blocking function in AP2151AFM-7?
AP2151AFM-7 blocks reverse current flow from OUT to IN when disabled or unpowered, using internal MOSFET body-diode orientation and gate control. This prevents backfeed into the main supply rail - critical in multi-rail systems and USB OTG configurations where peripheral batteries could otherwise discharge into host circuits.
Can AP2151AFM-7 be used in automotive applications?
No. AP2151AFM-7 is specified for industrial and commercial temperature ranges (−40°C to +85°C ambient) and lacks AEC-Q200 qualification, extended temperature grading, or automotive-specific reliability testing. It is not recommended for under-hood or safety-critical vehicle subsystems.
AP2151AFM-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
AP2151AFM-7 FAQ
1.How can I place an order for AP2151AFM-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2151AFM-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 AP2151AFM-7 reliable?
The price and inventory of AP2151AFM-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2151AFM-7 is usually 5 days.
3.What payment methods are accepted for AP2151AFM-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2151AFM-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2151AFM-7?
AP2151AFM-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2151AFM-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 AP2151AFM-7?
For technical support, including AP2151AFM-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2151AFM-7 requirements.
6.How does Aetrix verify that AP2151AFM-7 is sourced from the original manufacturer or authorized distributors?
All AP2151AFM-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 AP2151AFM-7 meets industry standards.
7.What is the process for return or replacement of AP2151AFM-7?
All AP2151AFM-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2151AFM-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 AP2151AFM-7 part is unused and in its original packaging.
Return procedure for AP2151AFM-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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