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Diodes Incorporated AP2151DWG-7
- Part No.:
- AP2151DWG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2151DWG-7.pdf
- Description:
- IC PWR SWITCH P-CHAN 1:1 SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:10,285
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Product details
Overview
AP2151DWG-7 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with integrated output discharge, 0.8A current limiting, 90mΩ RDS(ON), and 7ms deglitched fault reporting. It operates from 2.7V to 5.5V input, delivers controlled 0.6ms rise time, and is qualified for hot-swap applications in USB 2.0-compliant laptop docking stations and portable peripherals.
For engineers reviewing the AP2151DWG-7 datasheet, AP2151DWG-7 pinout, AP2151DWG-7 application, or AP2151DWG-7 equivalent, this device supports precise current-limited power sequencing, reverse-current blocking, undervoltage lockout (1.9V threshold), thermal shutdown at 140°C, and fault-flag reporting without external timing components - critical for robust USB port protection and embedded hot-plug designs.
Technical Context
The AP2151DWG-7 integrates a thermally protected N-channel MOSFET driver with slew-rate control, current-sense FET-based overcurrent detection, and an internal 100Ω discharge NMOS. Its UVLO circuit ensures the switch remains off until VIN ≥1.9V and disables it if VIN drops below that threshold during operation.
It implements dual-stage fault response: immediate current limiting (ILIMIT = 0.8A typ) upon overload, followed by thermal shutdown (TJ = 140°C) if sustained; FLG asserts low after 7ms blanking to reject transient false triggers, and remains asserted until both overcurrent and overtemperature faults clear.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 0.8A typical - maintains safe load current under overload without external sensing resistors |
| RDS(ON) | 90mΩ max at 5V/25°C (U-DFN2018-6) - minimizes conduction loss and self-heating in compact USB ports |
| Input Voltage Range | 2.7V to 5.5V - supports full USB 2.0 bus voltage range including degraded 3.3V VBUS conditions |
| Enable Polarity | Active High - simplifies direct interface with 3.3V/5V logic controllers without level-shifting |
| FLG Blanking Time | 7ms typical - suppresses false overcurrent flags caused by capacitive inrush or transient loads |
| Discharge Resistance | 100Ω internal - actively discharges output capacitance when disabled, preventing floating or residual voltage |
| Shutdown Current | 1µA max - enables ultra-low-power standby in battery-backed or always-on USB host systems |
Pinout & Package
AP2151DWG-7 is packaged in U-DFN2018-6: 2.0mm × 1.8mm, 0.5mm pitch, exposed thermal pad (internally connected to GND). The package supports high thermal efficiency (θJA = 70°C/W) with minimal PCB footprint for space-constrained USB Type-A/C ports.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 2) | Power Input | Primary supply connection; all IN pins must be tied together externally; accepts 2.7–5.5V USB bus |
| EN (Pin 3) | Enable Control | Active-High digital input; drives internal gate driver; compatible with 3.3V/5V logic levels |
| FLG (Pin 4) | Fault Reporting | Open-drain output asserted low on overcurrent or overtemperature; 7ms deglitch built-in |
| OUT (Pins 5 & 6) | Switched Output | High-side switched power rail; all OUT pins must be tied together externally; connects to USB load |
| GND (Pin 1) | Ground Reference | Power and signal ground; exposed thermal pad must be soldered to PCB GND plane for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Output Discharge Function | Internal 100Ω NMOS path discharges output capacitance on disable - eliminates need for external bleed resistors in USB hot-unplug |
| Reverse Current Blocking | Prevents backflow from OUT to IN when VOUT > VIN and switch is off - protects upstream power sources during peripheral removal |
| Controlled Rise Time | 0.6ms typical - limits inrush current into large output capacitors (e.g., 120µF), reducing stress on USB VBUS |
| UVLO Threshold | 1.9V nominal - ensures switch remains off during brown-out or incomplete power-up, enabling safe hot-insertion |
| ESD Robustness | 15kV IEC 61000-4-2 (air), 4kV HBM - withstands electrostatic events common in consumer device handling and assembly |
Applications
| USB 2.0 Port Protection | Laptop Docking Stations |
|---|---|
|
Use Scenario: Protecting individual USB downstream ports against short circuits, overloads, and hot-plug inlets. IC Role / Device Role / Timing Role: High-side power switch with current limiting, UVLO, and FLG fault signaling. Use Value: Prevents host VBUS collapse during cable shorts; enables automatic recovery after fault clearance without system reset. |
Use Scenario: Managing power delivery to multiple peripherals (HUBs, displays, storage) via a single laptop dock. IC Role / Device Role / Timing Role: Independent channel switching with controlled ramp-up and discharge per port. Use Value: Eliminates pop-on/pop-off transients; allows safe insertion/removal of peripherals while dock remains powered. |
| Smartphone/Tablet Charging Hubs | USB-C Alternate Mode Power Switching |
|
Use Scenario: Isolating charging paths in multi-port USB hubs where each port serves as a dedicated 5V supply. IC Role / Device Role / Timing Role: Load-switch controller with reverse-current blocking and thermal foldback. Use Value: Blocks backfeed from charged devices; sustains 500mA continuous load within USB 2.0 spec limits. |
Use Scenario: Enabling/disabling VBUS in USB-C receptacles supporting DisplayPort or HDMI Alt Mode handshaking. IC Role / Device Role / Timing Role: Controlled power gate synchronized with CC logic and PD negotiation state. Use Value: Ensures clean VBUS ramp before DP/HDMI link training; discharges residual voltage post-negotiation failure. |
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 | Integrated USB 2.0 hub controller + power switches; includes PHY, transceivers, and 3 downstream ports | Designed for full hub functionality, not discrete load switching; larger footprint and higher BOM cost | Select only when full USB hub IC capability (repeater, suspend/resume, enumeration) is required alongside switching |
| TPS2051BDBVR | 0.5A current limit, 120mΩ RDS(ON), no integrated discharge, 2.7–5.5V, active-high enable | Lacks output discharge and 7ms FLG deglitch; requires external RC network for reliable fault rejection | Choose for cost-sensitive, lower-current (<500mA) USB ports where discharge and advanced fault filtering are non-critical |
Compared with TUSB2036IRHBR and TPS2051BDBVR, AP2151DWG-7 provides optimal balance of discrete simplicity, 0.8A current capacity, integrated discharge, and robust 7ms-deglitched fault reporting - making it ideal for standalone USB port protection where space, thermal performance, and reliability are prioritized over hub integration or lowest unit cost.
Availability
AP2151DWG-7 is available at Aetrix Electronics and suitable for USB 2.0 port protection, laptop docking station power management, and smartphone charging hub designs requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for AP2151DWG-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 AP2151D series belongs to Diodes' USB Power Switch product line, engineered specifically for robust, low-footprint hot-swap protection in USB 2.0-compliant systems - emphasizing fast transient response, thermal resilience, and integrated safety features without external components.
FAQ
What is the maximum continuous load current supported by AP2151DWG-7?
The AP2151DWG-7 supports a recommended maximum continuous load current of 0.5A, derived from its 0.8A current-limit threshold and thermal design margin. At 5V input and 25°C ambient, its 90mΩ RDS(ON) yields ~22.5mW conduction loss, enabling sustained 500mA operation in U-DFN2018-6 with proper PCB thermal relief.
Does AP2151DWG-7 require external components for fault flag debouncing?
No. AP2151DWG-7 includes a built-in 7ms deglitch timer on the FLG pin, eliminating the need for external RC networks. This blanking period rejects false overcurrent reports caused by capacitive inrush or brief transients, ensuring reliable fault detection in real-world USB load scenarios.
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 output capacitance. For a 100µF capacitor, discharge time is ~60ms (RC time constant); this prevents residual voltage on hot-unplug, avoids latch-up in downstream ICs, and removes need for external bleed resistors - saving board space and BOM cost.
Can AP2151DWG-7 be used in USB-C applications requiring VBUS switching?
Yes - AP2151DWG-7 is suitable for USB-C receptacle VBUS switching in non-PD (Power Delivery) mode, where fixed 5V delivery is required. Its 2.7–5.5V input range, 0.6ms rise time, and reverse-current blocking meet USB-C specification requirements for legacy 5V-only ports and Alt Mode implementations without PD negotiation.
AP2151DWG-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):
- 500mA
- Rds On (Typ):
- 95mOhm
- Input Type:
- Non-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:
- SOT-25
AP2151DWG-7 FAQ
1.How can I place an order for AP2151DWG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2151DWG-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 AP2151DWG-7 reliable?
The price and inventory of AP2151DWG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2151DWG-7 is usually 5 days.
3.What payment methods are accepted for AP2151DWG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2151DWG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2151DWG-7?
AP2151DWG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2151DWG-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 AP2151DWG-7?
For technical support, including AP2151DWG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2151DWG-7 requirements.
6.How does Aetrix verify that AP2151DWG-7 is sourced from the original manufacturer or authorized distributors?
All AP2151DWG-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 AP2151DWG-7 meets industry standards.
7.What is the process for return or replacement of AP2151DWG-7?
All AP2151DWG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2151DWG-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 AP2151DWG-7 part is unused and in its original packaging.
Return procedure for AP2151DWG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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