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Diodes Incorporated AP2171AS-13
- Part No.:
- AP2171AS-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP2171AS-13.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
AP2171AS-13 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with 1.5A current limiting, 95mΩ on-resistance, and integrated short-circuit/thermal protection. It operates from 2.7V to 5.5V input, features 0.6ms typical rise time and 7ms deglitched fault flag, and is used in USB 2.0-compliant hot-swap ports for laptops and docking stations.
For engineers reviewing the AP2171AS-13 datasheet, AP2171AS-13 pinout, AP2171AS-13 application, or AP2171AS-13 equivalent, key selection criteria include enable polarity (active-high), current-limit accuracy (±20% over temperature), thermal shutdown threshold (140°C), and SO-8 package thermal resistance (110°C/W) for board-level power integrity.
Technical Context
The AP2171AS-13 implements a sense-FET–based current-limit architecture that clamps output current at 1.5A (typ) without external components while maintaining regulated voltage during overload. Its UVLO circuit disables the switch below 1.9V (typ) to prevent erratic turn-on during hot-plug insertion.
It integrates an open-drain FLG output with 7ms blanking time to suppress false over-current reports caused by capacitive inrush, and uses internal thermal sensing with 25°C hysteresis to cycle off/on during sustained faults-enabling robust self-protection without system intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 1.5A typ; maintains safe load current under short-circuit or overload without external sensing resistor |
| On-Resistance | 95mΩ typ @ 25°C, 5V; limits I²R power loss to ≤95mW at 1A, enabling SO-8 use in 1W thermal budget designs |
| Input Voltage Range | 2.7V–5.5V; supports full USB 2.0 bus range and accommodates brown-out conditions down to 2.7V |
| Rise Time | 0.6ms typ; soft-starts downstream loads to limit inrush current and reduce EMI in USB/HUB applications |
| UVLO Threshold | 1.9V typ; prevents switch activation until host supply stabilizes, ensuring reliable hot-plug sequencing |
| FLG Blanking Time | 7ms typ; filters transient inrush spikes from triggering fault reporting, eliminating need for external RC filtering |
| Shutdown Current | 1µA max; minimizes standby power draw in battery-backed or always-on USB peripheral systems |
Pinout & Package
AP2171AS-13 is supplied in SO-8 package (JEDEC MS-012AC) with exposed pad thermally connected to GND. Pin 1 = GND, Pin 2/3 = IN (tied externally), Pin 4 = EN (active-high), Pin 5 = FLG (open-drain), Pin 6/7 = OUT (tied externally), Pin 8 = NC (recommended tied to OUT).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Primary thermal and electrical return path; exposed pad must be soldered to PCB ground plane for θJA = 110°C/W |
| IN (Pins 2,3) | Input voltage supply | Dual-pin configuration reduces trace inductance; both pins must be shorted externally to minimize voltage drop |
| EN (Pin 4) | Enable control input | Active-high logic interface compatible with 3.3V/5V microcontrollers; VIH ≥2.0V, VIL ≤0.8V |
| FLG (Pin 5) | Fault reporting output | Open-drain signal asserted low during over-current or thermal fault; requires external pull-up for system monitoring |
| OUT (Pins 6,7) | Switched output | Dual-pin layout lowers conduction resistance and improves current sharing; must be shorted externally |
| NC (Pin 8) | No internal connection | Electrically isolated; recommended tied to OUT to reduce EMI and improve thermal coupling |
Key Features
| Feature | Design Value |
|---|---|
| Reverse current blocking | Prevents backflow from output to input when disabled, eliminating need for external blocking diode in dual-power domains |
| Controlled rise/fall time | 0.6ms rise / 0.05ms fall enables inrush-limited hot-plug without external RC networks or timing components |
| Integrated thermal shutdown | 140°C trip with 25°C hysteresis provides autonomous recovery from sustained overload without host intervention |
| ESD robustness | 4kV HBM rating allows direct handling in assembly without special ESD controls, reducing manufacturing risk |
| Green packaging | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets IEC 61249-2-21 and RoHS 2 compliance |
Applications
| USB 2.0 Host Port | Laptop Docking Station |
|---|---|
Use Scenario: Power delivery to downstream USB peripherals via motherboard-integrated port. IC Role / Device Role / Timing Role: High-side power switch controlling VBUS enable with fault reporting to USB controller. Use Value: Prevents bus over-current lockup by limiting peak current to 1.5A and asserting FLG within 7ms of fault onset. | Use Scenario: Isolating auxiliary power rails for HDMI, Ethernet, and USB-C expansion modules. IC Role / Device Role / Timing Role: Hot-swap power sequencer managing inrush during module insertion into live dock. Use Value: 0.6ms controlled rise time limits inrush to <1.2A, avoiding upstream supply droop and system reset. |
| Smartphone Charging Hub | Set-Top Box USB Port |
Use Scenario: Simultaneous data + charging through shared MHL/USB port with battery backup. IC Role / Device Role / Timing Role: Load switch enabling VBUS only after VIN ramps above UVLO threshold (1.9V). Use Value: UVLO ensures clean power-up sequencing-preventing partial enable states that could corrupt charging negotiation. | Use Scenario: Front-panel USB port powering flash drives or streaming dongles in consumer STB. IC Role / Device Role / Timing Role: Over-current protected power gate reporting faults to STB main processor via FLG line. Use Value: 7ms FLG blanking rejects capacitor-charging transients, preventing false disconnect events during normal drive enumeration. |
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 |
|---|---|---|---|
| AP2161AS-13 | Active-low EN, identical current limit (1.5A), same SO-8 package and pinout | Requires inverted enable logic; unsuitable where host MCU GPIO is fixed-active-high | Select when system control logic uses active-low signaling and no level-shifting is available |
| TPS2051BDR | 1.5A limit, 120mΩ RDS(ON), 2.7–5.5V, but no UVLO and 20ms FLG blanking | Lacks UVLO for hot-plug safety; longer blanking increases risk of missed fault detection in fast-fault scenarios | Choose only if UVLO and precise 7ms deglitch are not required, and higher on-loss is acceptable |
Compared with AP2161AS-13, AP2171AS-13 eliminates need for external inverters in active-high control systems; versus TPS2051BDR, it adds critical UVLO and tighter fault timing for USB 2.0 compliance and robust hot-swap operation.
Availability
AP2171AS-13 is available at Aetrix Electronics and suitable for USB 2.0 host ports, laptop docking stations, and set-top box front-panel interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AP2171AS-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 power management, signal integrity, and protection solutions for high-volume electronics markets.
The AP2171A product line delivers USB-compliant, current-limited high-side switches optimized for hot-swap reliability, thermal resilience, and minimal external component count in space-constrained consumer and computing platforms.
FAQ
What is the maximum continuous load current supported by AP2171AS-13?
The AP2171AS-13 is rated for 1.0A maximum continuous load current per the datasheet's Recommended Operating Conditions. Although its current limit is 1.5A, sustained operation above 1.0A risks exceeding thermal limits in SO-8 packaging-especially above 60°C ambient-due to its 110°C/W junction-to-ambient thermal resistance.
Does AP2171AS-13 require external components for basic USB 2.0 operation?
No external components are required for core functionality: the 7ms FLG deglitch, UVLO, and current limiting are fully integrated. However, a 0.01–0.1µF ceramic bypass capacitor between IN and GND is recommended, and ≥10µF bulk capacitance on IN/OUT improves transient immunity-per Diodes' Application Information section.
How does the FLG pin behave during a short-circuit event?
During a short circuit, FLG goes low after a 7ms nominal blanking period and remains low until both over-current and over-temperature conditions clear. If thermal shutdown activates, FLG stays asserted low even after current returns to normal-ensuring fault persistence until root cause removal, as confirmed in the Functional Block Diagram and Fault Flag timing specifications.
Can AP2171AS-13 be used in automotive infotainment USB ports?
No-AP2171AS-13 is specified for −40°C to +85°C ambient operation and lacks AEC-Q200 qualification, automotive-grade ESD (≥8kV HBM), or extended temperature validation. Its thermal shutdown threshold (140°C) and SO-8 package are not designed for under-hood or dashboard thermal cycling profiles required in automotive applications.
AP2171AS-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
AP2171AS-13 FAQ
1.How can I place an order for AP2171AS-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2171AS-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 AP2171AS-13 reliable?
The price and inventory of AP2171AS-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2171AS-13 is usually 5 days.
3.What payment methods are accepted for AP2171AS-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2171AS-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2171AS-13?
AP2171AS-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2171AS-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 AP2171AS-13?
For technical support, including AP2171AS-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2171AS-13 requirements.
6.How does Aetrix verify that AP2171AS-13 is sourced from the original manufacturer or authorized distributors?
All AP2171AS-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 AP2171AS-13 meets industry standards.
7.What is the process for return or replacement of AP2171AS-13?
All AP2171AS-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2171AS-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 AP2171AS-13 part is unused and in its original packaging.
Return procedure for AP2171AS-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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