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Diodes Incorporated AP2171DSG-13
- Part No.:
- AP2171DSG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP2171DSG-13.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
AP2171DSG-13 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 deglitched fault reporting - designed for hot-swap USB 2.0 ports in laptops, docking stations, and USB HUBs.
For engineers reviewing the AP2171DSG-13 datasheet, AP2171DSG-13 pinout, AP2171DSG-13 application, or AP2171DSG-13 equivalent, this device delivers precise current limiting, reverse-current blocking, UVLO, thermal shutdown with 25°C hysteresis, and controlled 0.6ms rise time - critical for reliable USB port power sequencing and fault resilience.
Technical Context
The AP2171D implements a thermally protected high-side N-channel MOSFET switch with internal gate driver, slew-rate control, and current-sense FET-based overcurrent detection. Its UVLO activates below 1.9V and deactivates above 2.5V, ensuring safe startup during hot-plug events.
It integrates a dedicated discharge NMOS (RDIS = 100Ω) activated on disable, enabling rapid VOUT ramp-down to <0.5V in ≤0.6ms with 1µF load. The open-drain FLG output asserts low after 7ms blanking for overcurrent or overtemperature faults, eliminating external RC filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit (Typical) | 1.5A - clamps sustained load current to prevent damage during overload or short-circuit conditions |
| RDS(ON) (U-DFN2018-6) | 90mΩ @ 5V, 25°C - minimizes conduction loss and self-heating at 1A load (90mW dissipation) |
| Input Voltage Range | 2.7V–5.5V - supports full USB 2.0 bus voltage range including degraded or battery-backed supplies |
| Rise Time (Typ.) | 0.6ms @ CL=1µF, RL=10Ω - provides soft-start to limit inrush current during hot-plug insertion |
| Shutdown Current | 1µA max - enables ultra-low-power standby in battery-powered USB peripherals |
| FLG Blanking Time | 7ms typ - suppresses false fault reporting from capacitive load turn-on transients |
| Discharge Resistance | 100Ω - ensures controlled VOUT decay without external components when disabled |
Pinout & Package
AP2171DSG-13 is packaged in U-DFN2018-6 (2.0mm × 1.8mm, 0.5mm pitch), featuring an exposed thermal pad that must be soldered to PCB ground for θJA = 70°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Voltage input | Primary power rail connection (2.7–5.5V); all IN pins tied externally |
| EN | Enable input | Active-high logic control (VIH ≥2V); enables/disables power switch and discharge function |
| GND | Ground reference | Power and signal return; connects to exposed thermal pad for thermal management |
| FLG | Fault flag output | Open-drain, active-low indicator for overcurrent or overtemperature events (7ms deglitch) |
| OUT | Voltage output | Switched power output; all OUT pins tied externally to drive downstream USB loads |
Key Features
| Feature | Design Value |
|---|---|
| Output Discharge Function | Internal 100Ω NMOS discharges output capacitor to <0.5V in ≤0.6ms upon disable - eliminates floating voltage on hot-unplugged ports |
| Reverse Current Blocking | Prevents backflow from VOUT to VIN when switch is off - protects upstream supply during peripheral battery discharge |
| Thermal Shutdown with Hysteresis | Shuts down at 140°C junction temperature and re-enables only after cooling by 25°C - prevents oscillation and enables safe fault recovery |
| UVLO Protection | Blocks turn-on until VIN ≥1.9V and forces shutdown if VIN drops below ~1.9V - ensures robust operation during brownout or cable disconnect |
| ESD Robustness | 4kV HBM / 300V MM - withstands handling and system-level ESD events common in consumer USB interfaces |
Applications
| USB 2.0 Port Power Switching | Laptop Docking Station Power Management |
|---|---|
Use Scenario: Individual USB 2.0 downstream port in a multi-port hub requiring independent overcurrent protection and hot-plug safety. IC Role / Device Role: High-side power switch controlling VBUS delivery with current limiting, discharge, and fault reporting. Use Value: Prevents host port damage during short-circuit events and ensures clean power removal when devices are unplugged. |
Use Scenario: Power distribution to USB-A, HDMI, and Ethernet ports on a laptop docking station with shared 5V rail. IC Role / Device Role: Independent channel switch enabling per-port power enable/disable and status monitoring via FLG. Use Value: Enables software-controlled port power cycling and real-time fault detection without MCU GPIO overhead. |
| Desktop PC Front-Panel USB Hub | Industrial USB Peripheral Interface |
Use Scenario: Front-panel USB 2.0 ports on desktop motherboards where long traces increase inrush and EMI risk. IC Role / Device Role: Localized hot-swap controller with controlled rise time and reverse-current blocking. Use Value: Limits inrush surge to <1A during plug-in and blocks backfeed from peripherals with local batteries. |
Use Scenario: USB-connected industrial sensors or actuators operating in extended temperature environments (-40°C to +85°C). IC Role / Device Role: Protected 5V power switch with guaranteed operation across full ambient range and thermal hysteresis. Use Value: Maintains reliable port power control and fault reporting without derating in uncontrolled enclosures. |
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 |
|---|---|---|---|
| TCK107AG,LF | Active-high enable; 1.2A current limit; 120mΩ RDS(ON); no integrated discharge | Lacks output discharge - requires external circuitry for VOUT ramp-down | Select when discharge is unnecessary and lower cost is prioritized over feature completeness |
| TPS2051BDBVR | Active-high enable; 1.5A limit; 95mΩ RDS(ON); 3.5ms FLG blanking; no discharge | No discharge function; shorter blanking increases false-trigger risk with large output caps | Choose when TI ecosystem compatibility or tighter blanking tolerance is required, accepting external discharge design |
Compared with TCK107AG and TPS2051BDBVR, AP2171DSG-13 uniquely integrates output discharge, 7ms robust blanking, and reverse-current blocking in a 2.0×1.8mm U-DFN package - reducing BOM count and PCB area while enhancing USB port safety and hot-plug reliability.
Availability
AP2171DSG-13 is available at Aetrix Electronics and suitable for USB 2.0 port protection, laptop docking station power control, and industrial peripheral interface designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AP2171DSG-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 high-reliability power management, signal integrity, and protection solutions for consumer, computing, and industrial markets.
The AP2171D belongs to Diodes' USB power switch product line, engineered specifically for robust hot-swap operation in USB 2.0 systems - emphasizing accurate current limiting, fast transient response, and integrated protection without external components.
FAQ
What is the maximum continuous load current supported by AP2171DSG-13?
The AP2171DSG-13 supports a recommended maximum continuous load current of 1.0A, as specified in the datasheet's Recommended Operating Conditions. While its current-limit threshold is 1.5A (typical), sustained operation above 1.0A requires careful thermal design due to RDS(ON) heating - especially in the U-DFN2018-6 package with θJA = 70°C/W.
Does AP2171DSG-13 require external components for basic USB port protection?
No external components are required for core functionality: the 7ms FLG deglitch, 100Ω discharge path, UVLO, and thermal shutdown are fully integrated. Only standard 0.1µF ceramic bypass capacitors on IN and OUT are recommended for stability - no current-sense resistors, RC timers, or external discharge FETs are needed.
How does the discharge function behave during normal operation?
The discharge function activates only when EN is de-asserted (logic low). It connects an internal 100Ω NMOS between OUT and GND, discharging the output capacitor. During normal enabled operation, the discharge path is completely inactive - it does not affect steady-state efficiency, leakage, or reverse-blocking performance.
Can AP2171DSG-13 be used in dual-role USB ports (e.g., charging + data)?
No - AP2171DSG-13 is not recommended for dual-purpose ports like USB-C or MHL/HDMI combo ports where the same connector simultaneously handles data and battery charging. Its integrated discharge function will drain peripheral batteries whenever the switch is disabled, creating an overstress condition incompatible with bidirectional power flow requirements.
AP2171DSG-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SO
AP2171DSG-13 FAQ
1.How can I place an order for AP2171DSG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2171DSG-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 AP2171DSG-13 reliable?
The price and inventory of AP2171DSG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2171DSG-13 is usually 5 days.
3.What payment methods are accepted for AP2171DSG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2171DSG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2171DSG-13?
AP2171DSG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2171DSG-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 AP2171DSG-13?
For technical support, including AP2171DSG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2171DSG-13 requirements.
6.How does Aetrix verify that AP2171DSG-13 is sourced from the original manufacturer or authorized distributors?
All AP2171DSG-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 AP2171DSG-13 meets industry standards.
7.What is the process for return or replacement of AP2171DSG-13?
All AP2171DSG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2171DSG-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 AP2171DSG-13 part is unused and in its original packaging.
Return procedure for AP2171DSG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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