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Diodes Incorporated AP2101SG-13
- Part No.:
- AP2101SG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP2101SG-13.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,294
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Product details
Overview
AP2101SG-13 from Diodes Incorporated is a single-channel, active-low enable, high-side power switch optimized for USB 2.0 hot-swap applications. It delivers 2.45A current limiting, 90mΩ on-resistance at 5V, and integrated short-circuit/thermal protection with 7ms deglitch on the open-drain FLG output. Used in laptop USB ports and docking stations to manage inrush, prevent bus faults, and auto-discharge output capacitance.
For engineers reviewing the AP2101SG-13 datasheet, AP2101SG-13 pinout, AP2101SG-13 application, or AP2101SG-13 equivalent, key selection criteria include enable polarity (active-low), thermal shutdown threshold (140°C), UVLO trip point (1.9V), and SO-8 package compatibility with standard USB power delivery layouts.
Technical Context
The AP2101SG-13 integrates a low-RDS(ON) N-channel MOSFET with precision current-sense circuitry, enabling accurate 2.45A over-current limiting without external components. Its internal deglitch timer (7ms typ) filters transient load spikes before asserting the FLG signal.
It implements under-voltage lockout (UVLO) at 1.9V to prevent erratic switching during brown-out, and features an active-low EN input synchronized with USB suspend/resume logic. The device supports reverse current blocking and provides controlled 0.6ms rise time to limit inrush into downstream capacitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 2.45A typical - clamps sustained output current to protect upstream source and downstream load during overload |
| RDS(ON) | 90mΩ at VIN = 5V, TA = +25°C - enables <100mW conduction loss at 1.5A, reducing thermal stress in SO-8 package |
| Enable Polarity | Active-low - directly interfaces with USB controller's active-high suspend signal via simple inverter or direct GPIO control |
| FLG Response | 7ms deglitch timeout - suppresses false fault reporting during capacitor charging transients without external RC filtering |
| Input Voltage Range | 2.7V to 5.5V - covers full USB 2.0 VBUS tolerance (4.75–5.25V) plus margin for drop across upstream FETs or cables |
| Shutdown Current | 1μA max - minimizes standby power draw in battery-backed or always-on USB host systems |
| UVLO Threshold | 1.9V typical - ensures switch remains off until stable power is established, critical for hot-plug reliability |
Pinout & Package
AP2101SG-13 is supplied in SO-8 package (lead-free, RoHS-compliant, "Green" molding compound). Exposed pad is thermally connected to GND for enhanced heat dissipation but must not serve as primary electrical ground path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for internal bias and thermal sensing; must be low-impedance connection to PCB ground plane |
| 2,3 IN | Power input | Dual pins tied together externally - accepts 2.7–5.5V VBUS; requires local 0.1μF ceramic bypass |
| 4 EN | Enable control | Active-low logic input; pulls low to enable switch; high-Z when disabled; compatible with 1.8V/3.3V/5V logic |
| 5 FLG | Fault indicator | Open-drain output asserted low after 7ms deglitch upon over-current or over-temperature event |
| 6,7 OUT | Switched output | Dual pins tied together externally - supplies regulated VBUS to downstream USB port or load |
| 8 NC | No connect | Internally unconnected; recommended to tie to OUT for mechanical stability and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | 290Ω internal discharge path activates on disable - safely bleeds 120μF output caps in ~30ms, preventing backfeed into upstream source |
| Reverse current blocking | 0.05μA leakage at VIN = 0V, VOUT = 5V - prevents powered peripherals from back-driving disabled USB ports |
| Fast short-circuit response | 5μs detection-to-limit activation - protects against destructive current surges before PCB traces or connectors overheat |
| Controlled rise/fall time | 0.6ms rise / 0.03ms fall - soft-starts loads to limit inrush while enabling rapid fault recovery |
| Thermal shutdown hysteresis | 25°C - allows automatic recovery after cooling, avoiding latch-up during intermittent overload conditions |
Applications
| USB 2.0 Host Port Protection | Laptop Docking Station Power Control |
|---|---|
|
Use Scenario: A laptop exposes multiple USB 2.0 Type-A ports requiring individual over-current protection and hot-plug compliance. IC Role / Device Role / Timing Role: High-side power switch managing VBUS delivery per port; enables/disables based on USB enumeration status and fault state. Use Value: Prevents bus-wide shutdown during single-port overload; 2.45A limit matches USB 2.0 spec; 7ms FLG deglitch avoids false disconnects during plug-in transients. |
Use Scenario: Docking station supplies power to attached peripherals (HDD, Ethernet, display adapters) via USB and proprietary connectors. IC Role / Device Role / Timing Role: Independent channel switch isolating each peripheral rail; coordinated with system power manager via EN/FLG signals. Use Value: Enables selective power cycling without resetting entire dock; auto-discharge clears residual charge before re-enabling; SO-8 footprint simplifies layout in space-constrained modules. |
| Set-Top Box USB Peripheral Hub | Industrial USB I/O Module |
|
Use Scenario: Consumer STB includes front-panel USB ports for media sticks and service diagnostics tools. IC Role / Device Role / Timing Role: Hot-swap controller enforcing USB 2.0 current limits and reporting faults to embedded MCU via FLG. Use Value: Meets UL/IEC60950-1 safety certification requirements; 140°C thermal shutdown prevents fire hazard under sustained short; -35°C to 85°C rating covers ambient extremes. |
Use Scenario: DIN-rail mounted industrial controller adds USB connectivity for configuration and firmware updates in factory environments. IC Role / Device Role / Timing Role: Robust power interface between 5V system rail and field-replaceable USB devices subject to ESD and cable fault events. Use Value: 4kV HBM ESD rating withstands handling in uncontrolled environments; reverse current blocking prevents backfeed from powered test equipment; SO-8 package supports automated assembly. |
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 built-in power switches; 3-port, 100mA per port; no programmable current limit | Designed for full hub functionality (transaction scheduling, signaling), not discrete power switching | Select only if full USB hub logic is required; not a drop-in replacement for standalone switching |
| TPS2051BDBVR | 2.3A current limit, active-high EN, 110mΩ RDS(ON), 14ms FLG blanking, SO-8 package | Higher RDS(ON) increases conduction loss; longer blanking may miss fast transients; different enable polarity requires level shift | Acceptable where active-high EN aligns with system logic and 14ms fault latency is tolerable |
Compared with TPS2051BDBVR, AP2101SG-13 offers tighter current accuracy (±0.35A vs ±0.5A), lower on-resistance (90mΩ vs 110mΩ), and faster fault response (5μs vs 10μs), making it preferable for compact, thermally constrained USB designs demanding precise current control.
Availability
AP2101SG-13 is available at Aetrix Electronics and suitable for USB 2.0 host port protection, laptop docking station power management, and industrial USB I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP2101SG-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 consumer, computing, and industrial markets.
The AP2101/AP2111 product line was designed specifically for USB-compliant hot-swap power distribution, emphasizing accuracy, speed, and integration to replace discrete FET+controller solutions in space- and cost-sensitive applications.
FAQ
What is the maximum continuous load current supported by AP2101SG-13?
The AP2101SG-13 supports up to 2.0A continuous load current per the manufacturer's recommended operating conditions. While its current limit is set at 2.45A typical, sustained operation above 2.0A risks exceeding thermal limits in SO-8 packaging-especially without adequate PCB copper area or airflow-so 2.0A is the validated safe operating ceiling.
Does AP2101SG-13 require external components for basic USB port protection?
No external components are required for core functionality: current limiting, thermal shutdown, UVLO, and FLG reporting operate autonomously. However, a 0.1μF ceramic capacitor between IN and GND is mandatory for stability, and a 120μF electrolytic capacitor on OUT is recommended for reliable short-circuit protection below –30°C per Diodes' application guidance.
How does the auto-discharge feature work, and what is its design impact?
Upon disable (EN high), the AP2101SG-13 activates an internal 290Ω discharge path from OUT to GND, draining output capacitance. For a 120μF load, this achieves ~90% discharge in 33ms. This eliminates need for external bleed resistors, reduces board area, and prevents backfeed into upstream sources-critical for USB OTG and dual-power-domain systems.
Can AP2101SG-13 be used in USB 3.0 applications?
The AP2101SG-13 is specified and qualified for USB 2.0 compliance only. While its 2.45A current limit exceeds USB 3.0's 900mA requirement, its 0.6ms rise time and lack of high-speed signal integrity validation make it unsuitable for USB 3.0 data lines. It may be used solely for VBUS switching in USB 3.0 downstream ports-but only if the host controller handles all SuperSpeed signaling independently.
AP2101SG-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):
- 2A
- 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:
- -35°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
AP2101SG-13 FAQ
1.How can I place an order for AP2101SG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2101SG-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 AP2101SG-13 reliable?
The price and inventory of AP2101SG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2101SG-13 is usually 5 days.
3.What payment methods are accepted for AP2101SG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2101SG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2101SG-13?
AP2101SG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2101SG-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 AP2101SG-13?
For technical support, including AP2101SG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2101SG-13 requirements.
6.How does Aetrix verify that AP2101SG-13 is sourced from the original manufacturer or authorized distributors?
All AP2101SG-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 AP2101SG-13 meets industry standards.
7.What is the process for return or replacement of AP2101SG-13?
All AP2101SG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2101SG-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 AP2101SG-13 part is unused and in its original packaging.
Return procedure for AP2101SG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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