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Diodes Incorporated AP2171SG-13
- Part No.:
- AP2171SG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP2171SG-13.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,331
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Product details
Overview
AP2171SG-13 from Diodes Incorporated is a single-channel, active-high enable, current-limited high-side power switch optimized for USB 2.0-compliant hot-swap applications. It delivers 1.5A accurate current limiting, 95mΩ RDS(ON) at +25°C (SO-8), 2.7V–5.5V input range, and integrated short-circuit/thermal protection with 7ms deglitched FLG reporting - deployed in consumer USB ports, docking stations, and set-top boxes.
For engineers reviewing the AP2171SG-13 datasheet, AP2171SG-13 pinout, AP2171SG-13 application, or AP2171SG-13 equivalent, this page provides verified package mapping (SO-8), confirmed circuit role (USB port power control), thermal shutdown threshold (+140°C), rise time (0.6ms typ), and reverse current blocking capability - all critical for USB power delivery integrity and hot-plug reliability.
Technical Context
The AP2171SG-13 implements a monolithic N-channel MOSFET high-side switch with integrated current-sense FET architecture-enabling precise 1.5A overcurrent limiting without external sense resistors. Its UVLO (1.9V typ) ensures safe turn-on only after stable input rail establishment, while the 7ms deglitch on the open-drain FLG output prevents false fault reporting during capacitive load inrush.
Thermal protection operates via die-temperature sensing: shutdown triggers at +140°C with +25°C hysteresis, enabling auto-recovery cycling under sustained overload. The active-high EN pin directly interfaces with USB host controllers requiring logic-level enable signaling, and reverse current blocking eliminates backfeed when output voltage exceeds input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 1.5A typical - clamps output current to prevent damage during short circuits or overloads |
| RDS(ON) | 95mΩ max at +25°C (SO-8) - minimizes conduction loss and self-heating under 1A load |
| Input Voltage Range | 2.7V–5.5V - supports full USB 2.0 bus voltage tolerance and Li-ion backup compatibility |
| Rise Time | 0.6ms typical - controls inrush current to limit system voltage droop during hot-plug events |
| Shutdown Current | 1µA max - enables ultra-low power state retention in battery-backed or always-on USB hubs |
| FLG Blanking Time | 7ms typical - suppresses transient overcurrent spikes from bulk capacitor charging, eliminating need for external RC filtering |
| UVLO Threshold | 1.9V typical - prevents erratic switching during brown-out or power-up sequencing |
| Thermal Shutdown | +140°C trigger with +25°C hysteresis - enables safe fault recovery without manual reset |
Pinout & Package
AP2171SG-13 is supplied in SO-8 package (lead-free, RoHS-compliant, exposed pad not electrically connected). Pin 1 = NC (tie to OUT), Pins 2 & 3 = IN (must be externally shorted), Pin 4 = EN (active-high), Pin 5 = FLG (open-drain, active-low fault flag), Pins 6 & 7 = OUT (must be externally shorted), Pin 8 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Must be tied to OUT for mechanical stability and EMI reduction; no electrical function |
| 2,3 (IN) | Power input node | Primary VIN connection; both pins share internal bond wire - must be shorted externally |
| 4 (EN) | Enable control input | Active-high logic interface; drives internal driver stage to turn on high-side MOSFET |
| 5 (FLG) | Fault reporting output | Open-drain, active-low signal asserted after 7ms deglitch upon overcurrent or thermal fault |
| 6,7 (OUT) | Switched power output | Delivers controlled current to load; both pins share internal bond wire - must be shorted externally |
| 8 (GND) | Reference ground | Return path for internal current-sense and thermal circuits; must connect to low-impedance system ground |
Key Features
| Feature | Design Value |
|---|---|
| Reverse current blocking | Prevents backfeed from powered downstream loads into upstream supply during disable or VIN removal |
| Controlled 0.6ms rise time | Soft-starts load capacitance to limit peak inrush current and avoid system rail collapse |
| 7ms FLG deglitch | Eliminates false fault assertions during normal 68µF output capacitor charging transients |
| 1.5A accurate current limit | Guarantees consistent trip point across -40°C to +85°C ambient, independent of external components |
| UVLO at 1.9V | Ensures switch remains off until input rail stabilizes above minimum USB operating voltage |
Applications
| USB 2.0 Host Port | Self-Powered Hub |
|---|---|
|
Use Scenario: Desktop PC or monitor providing dedicated 5V power to a single downstream USB device. IC Role / Device Role / Timing Role: High-side power switch controlling VBUS delivery; enables/disables port power per USB specification. Use Value: Prevents overcurrent damage during cable insertion and enforces USB 2.0 current-limit compliance with no external components. |
Use Scenario: Standalone USB hub with local 5V supply powering four downstream ports. IC Role / Device Role / Timing Role: Per-port power gate with fault reporting to hub controller via FLG line. Use Value: Enables individual port disable and overcurrent event logging without affecting other active ports. |
| Hot-Swap Docking Station | Set-Top Box USB Peripheral Port |
|
Use Scenario: Laptop docking station accepting hot-insertion of USB peripherals while main system remains powered. IC Role / Device Role / Timing Role: Controlled power ramp generator using 0.6ms rise time to limit inrush during connector mating. Use Value: Eliminates contact arcing and system voltage sag, extending connector life and ensuring stable host operation. |
Use Scenario: Consumer STB offering USB-A port for firmware updates or media playback via flash drive. IC Role / Device Role / Timing Role: Protected power delivery node with thermal shutdown and reverse-current isolation. Use Value: Blocks backfeed from faulty USB drives and survives sustained short-circuits without latch-up or damage. |
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; requires external crystal; higher BOM cost | Designed for multi-port hub IC implementation, not discrete single-port replacement | Select only when consolidating hub logic and power control into one IC; not drop-in for AP2171SG-13 |
| TPS2051BDBVR | 1.5A limit, active-high EN, but 110mΩ RDS(ON) (SO-8), no reverse current blocking, 10ms FLG blanking | Lacks reverse current isolation and has slower fault response - unsuitable for bidirectional USB systems | Acceptable only in unidirectional, non-backfeed-sensitive designs where lower cost outweighs missing features |
Compared with TUSB2036IRHBR and TPS2051BDBVR, AP2171SG-13 uniquely combines reverse current blocking, 95mΩ conduction loss, and 7ms precision deglitch in a minimal SO-8 footprint - making it optimal for discrete, space-constrained, and bidirectionally isolated USB port designs.
Availability
AP2171SG-13 is available at Aetrix Electronics and suitable for USB 2.0 host ports, self-powered hubs, and hot-swap docking stations requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP2171SG-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 AP2171SG-13 belongs to Diodes' USB Power Switch product line, engineered specifically for robust, low-component-count USB port protection in space-constrained and thermally demanding applications.
FAQ
What is the maximum continuous load current supported by AP2171SG-13?
The AP2171SG-13 supports 1.0A maximum continuous load current per its Recommended Operating Conditions table. Although its current limit is 1.5A, sustained operation above 1.0A risks thermal shutdown due to power dissipation in the SO-8 package - especially above +60°C ambient. Derating curves confirm 1.0A as the safe steady-state limit.
Does AP2171SG-13 require external components for basic USB port protection?
No external components are required for core functionality: current limiting, thermal protection, UVLO, and FLG reporting are fully integrated. A 0.1µF ceramic bypass capacitor between IN and GND is recommended for noise suppression, and bulk output capacitance (≥10µF) improves transient immunity - but neither is mandatory for basic overcurrent or short-circuit protection.
Can AP2171SG-13 be used in battery-powered USB devices?
Yes - its 1µA max shutdown current and 2.7V minimum input make it suitable for portable USB peripherals powered by single-cell Li-ion (3.0–4.2V) or dual-cell alkaline (2.7–3.6V) sources. Reverse current blocking prevents battery drain when the device is disabled but downstream circuitry remains powered.
How does the 7ms FLG deglitch improve system reliability?
The 7ms deglitch prevents false fault assertions caused by benign inrush currents during output capacitor charging - particularly with 68µF or larger bulk caps common in USB applications. Without it, the FLG line would pulse low repeatedly during startup, triggering unnecessary host controller interrupts or port resets.
AP2171SG-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-SOP
AP2171SG-13 FAQ
1.How can I place an order for AP2171SG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2171SG-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 AP2171SG-13 reliable?
The price and inventory of AP2171SG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2171SG-13 is usually 5 days.
3.What payment methods are accepted for AP2171SG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2171SG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2171SG-13?
AP2171SG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2171SG-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 AP2171SG-13?
For technical support, including AP2171SG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2171SG-13 requirements.
6.How does Aetrix verify that AP2171SG-13 is sourced from the original manufacturer or authorized distributors?
All AP2171SG-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 AP2171SG-13 meets industry standards.
7.What is the process for return or replacement of AP2171SG-13?
All AP2171SG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2171SG-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 AP2171SG-13 part is unused and in its original packaging.
Return procedure for AP2171SG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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