My Inquiry
My Account
Diodes Incorporated AP2171DWG-7
- Part No.:
- AP2171DWG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2171DWG-7.pdf
- Description:
- IC PWR SWITCH P-CHAN 1:1 SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:35,066
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP2171DWG-7 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with integrated output discharge, 1.5A current limiting, 90mΩ RDS(ON) (U-DFN2018-6), and 7ms FLG deglitch. It operates from 2.7V to 5.5V input and delivers controlled turn-on (0.6ms typical rise time) for hot-swap protection in USB 2.0-compliant host ports.
For engineers reviewing the AP2171DWG-7 datasheet, AP2171DWG-7 pinout, AP2171DWG-7 application, or AP2171DWG-7 equivalent, this device is selected for precise current-limited power delivery, reverse-current blocking, UVLO-protected startup, and fault-flag reporting without external timing components.
Technical Context
The AP2171DWG-7 implements a thermally protected, slew-rate-controlled high-side NMOS switch with internal current-sense FET and UVLO circuitry. Its gate driver incorporates soft-start logic that limits dV/dt at the output to prevent inrush surges during hot-plug events.
It integrates a dedicated discharge path (100Ω internal NMOS) activated upon EN deassertion, enabling rapid VOUT collapse to 0.5V in ≤0.6ms with 1µF load. The open-drain FLG pin asserts low after 7ms blanking for over-current or thermal faults, eliminating false triggers from capacitive load transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 1.5A typical; clamps sustained load current to prevent damage under overload or short-circuit conditions |
| RDS(ON) | 90mΩ max (U-DFN2018-6 @ 25°C, VIN=5V); enables <100mW conduction loss at 1A |
| Input Voltage Range | 2.7V–5.5V; supports full USB 2.0 bus voltage range including degraded 3.3V systems |
| Enable Polarity | Active High; simplifies interface with microcontroller GPIOs without level-shifting or inversion logic |
| FLG Blanking Time | 7ms typical; suppresses transient over-current events (e.g., capacitor charging) without external RC networks |
| Shutdown Current | 1µA max; minimizes standby power draw in battery-backed or always-on USB port applications |
| Output Discharge Resistance | 100Ω typical; provides predictable RC-based discharge timing for safe load isolation |
Pinout & Package
AP2171DWG-7 is packaged in U-DFN2018-6 - a 2.0mm × 1.8mm, 0.5mm pitch, thermally enhanced leadless package with exposed pad for GND connection and improved θJA (70°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Voltage Input | Primary power rail input (2.7V–5.5V); all IN pins tied together externally |
| EN | Enable Control | Active-High digital control; drives internal gate driver when pulled ≥2V |
| GND | Ground Reference | Power and signal return; must be connected to PCB ground plane and exposed pad |
| FLG | Fault Reporting | Open-drain flag; pulls low during over-current or thermal fault after 7ms deglitch |
| OUT | Switched Output | High-side switched output; all OUT pins tied together externally to load |
| NC | No Connection | Not internally bonded; recommended to connect to OUT for EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Output Discharge | 100Ω internal NMOS path discharges output to <0.5V in ≤0.6ms (1µF load), eliminating floating voltages during disable |
| Reverse Current Blocking | Prevents backflow from VOUT to VIN when disabled, protecting upstream supplies from load-side battery leakage |
| UVLO Threshold | 1.9V typical turn-on / 1.6V turn-off; ensures switch remains off until stable input is established, critical for hot-insertion reliability |
| Thermal Shutdown Hysteresis | 140°C trip / 25°C recovery; prevents oscillation during sustained overload by enforcing 25°C cooling margin before auto-restart |
| ESD Robustness | 4kV HBM / 300V MM; withstands handling and system-level ESD events without latch-up or parameter shift |
Applications
| USB Host Port Protection | Laptop Docking Station Power Control |
|---|---|
Use Scenario: Protecting downstream USB peripherals from inrush, short circuits, and reverse current during plug-in/out cycles on a desktop motherboard USB hub controller. IC Role / Device Role / Timing Role: High-side power switch with controlled 0.6ms rise time and 7ms fault blanking, acting as primary current-limiting and fault-isolation element. Use Value: Prevents host VBUS collapse during peripheral hot-plug, eliminates need for external current-sense resistors or RC timers, and blocks reverse current from charged peripherals. | Use Scenario: Managing power delivery to multiple USB-A, HDMI, and Ethernet ports on a laptop docking station with shared 5V rail. IC Role / Device Role / Timing Role: Individual channel power switch per port, enabling independent enable/disable and fault reporting via discrete FLG lines. Use Value: Enables per-port power sequencing, isolates faults to single ports, and supports graceful shutdown of powered accessories without affecting other interfaces. |
| Set-Top Box USB Peripheral Interface | Smartphone/Tablet USB OTG Power Gate |
Use Scenario: Providing isolated 5V power to USB flash drives or keyboards attached to an embedded Linux-based set-top box running 24/7. IC Role / Device Role / Timing Role: Hot-swap power switch with UVLO and thermal protection, ensuring reliable operation across ambient temperatures from –40°C to +85°C. Use Value: Guarantees clean power ramp-up, prevents brownout-induced firmware crashes during drive insertion, and maintains long-term reliability under continuous duty. | Use Scenario: Enabling USB On-The-Go (OTG) host mode on smartphones where the device powers external peripherals like mice or storage. IC Role / Device Role / Timing Role: Bidirectional power gate with reverse-current blocking, preventing battery drain when peripheral VBUS exceeds phone VBAT. Use Value: Eliminates parasitic discharge through USB data lines, extends battery life during OTG use, and meets USB-IF compliance for host-mode power integrity. |
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 with three downstream ports; includes built-in power switches but no output discharge or 7ms FLG blanking | Designed for multi-port hub ICs, not discrete single-channel switching; lacks independent FLG reporting per channel | Select when consolidating hub logic and power control; avoid when needing standalone, pin-defined fault isolation per port |
| TPS2051BDBVR | 1.5A single-channel high-side switch with 100mΩ RDS(ON), active-high EN, but no integrated output discharge or reverse-current blocking | Requires external diode for reverse-current protection and external RC network for FLG debouncing | Choose for cost-sensitive designs where discharge and reverse-blocking are handled externally; not suitable for space-constrained USB OTG or docking applications |
Compared with TUSB2036IRHBR and TPS2051BDBVR, AP2171DWG-7 uniquely combines output discharge, reverse-current blocking, and 7ms deglitched FLG in a 2.0×1.8mm U-DFN package-enabling compact, self-contained USB power gating without auxiliary components.
Availability
AP2171DWG-7 is available at Aetrix Electronics and suitable for USB 2.0 host ports, laptop docking stations, and set-top box peripheral interfaces requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.
Supply support for AP2171DWG-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 AP2171D product line targets USB-compliant hot-swap power distribution, delivering integrated protection (UVLO, current limit, thermal shutdown) and intelligent control (discharge, reverse-blocking, deglitched fault reporting) in miniature packages.
FAQ
What is the maximum continuous load current supported by AP2171DWG-7?
The AP2171DWG-7 is rated for 1.0A maximum continuous load current per its Recommended Operating Conditions, despite a 1.5A current-limit threshold. This derating ensures thermal stability across ambient temperatures up to +85°C in the U-DFN2018-6 package, where θJA = 70°C/W and RDS(ON) rises with temperature. Sustained operation above 1A requires careful PCB thermal design and may trigger thermal shutdown.
Does AP2171DWG-7 require external components for basic USB power switching functionality?
No external components are required for core functionality: the 7ms FLG deglitch, output discharge path, UVLO, and current limiting are fully integrated. Only two ceramic bypass capacitors (0.1µF near IN-GND and 0.1µF near OUT-GND) are recommended per the datasheet to suppress transients-no external resistors, diodes, or timing capacitors are needed for standard USB 2.0 hot-swap operation.
How does the output discharge function behave during enable deassertion?
When EN is driven low, the internal 100Ω NMOS discharge switch activates between OUT and GND, collapsing VOUT to <0.5V within 0.6ms for a 1µF load. This discharge path remains active only while EN is inactive and is automatically disabled upon re-enable. It does not interfere with normal forward conduction and is independent of FLG status or fault conditions.
Can AP2171DWG-7 be used in dual-role USB ports (e.g., USB-C DRP) where power direction reverses?
No-AP2171DWG-7 is a unidirectional high-side switch optimized for fixed-source (host) applications. Its discharge function actively pulls OUT to GND when disabled, which would drain batteries in peripheral devices during host-mode disable. For dual-role ports, dedicated bidirectional switches or USB-C PD controllers with programmable VCONN/VBUS routing are required instead.
AP2171DWG-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:
- 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:
- SOT-25
AP2171DWG-7 FAQ
1.How can I place an order for AP2171DWG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2171DWG-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 AP2171DWG-7 reliable?
The price and inventory of AP2171DWG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2171DWG-7 is usually 5 days.
3.What payment methods are accepted for AP2171DWG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2171DWG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2171DWG-7?
AP2171DWG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2171DWG-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 AP2171DWG-7?
For technical support, including AP2171DWG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2171DWG-7 requirements.
6.How does Aetrix verify that AP2171DWG-7 is sourced from the original manufacturer or authorized distributors?
All AP2171DWG-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 AP2171DWG-7 meets industry standards.
7.What is the process for return or replacement of AP2171DWG-7?
All AP2171DWG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2171DWG-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 AP2171DWG-7 part is unused and in its original packaging.
Return procedure for AP2171DWG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP2171DWG-7 Tags
-
TPS22919DCKR
Texas Instruments
-
MIC2091-1YM5-TR
Microchip Technology
-
MIC2090-1YM5-TR
Microchip Technology
-
TPS22995RZFR
Texas Instruments
-
TPS22975DSGR
Texas Instruments
-
SIP32510DT-T1-GE3
Vishay Siliconix
-
ULN2003D1013TR
STMicroelectronics
-
MIC2005A-1YM5-TR
Microchip Technology
-
MIC2005A-1YM6-TR
Microchip Technology
-
TPS22916BYFPR
Texas Instruments
-
TPS22917DBVR
Texas Instruments
-
ULN2003APWR
Texas Instruments
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
