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Diodes Incorporated AP2191DSG-13
- Part No.:
- AP2191DSG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP2191DSG-13.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:5,496
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Product details
Overview
AP2191DSG-13 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with integrated current limiting (2.1A typ), 90mΩ RDS(ON) at 5V, and output discharge functionality. It operates from 2.7V–5.5V input, delivers controlled 0.6ms rise time, and provides overcurrent, thermal, UVLO, and reverse-current protection - deployed in USB 2.0-compliant hot-swap ports on laptops and docking stations.
For engineers reviewing the AP2191DSG-13 datasheet, AP2191DSG-13 pinout, AP2191DSG-13 application, or AP2191DSG-13 equivalent, key selection criteria include enable polarity (active-high), output discharge resistance (100Ω), FLG blanking time (7ms typ), and package-specific thermal resistance (70°C/W for U-DFN2018-6).
Technical Context
The AP2191DSG-13 implements a thermally protected high-side NMOS switch with slew-rate-controlled gate drive, enabling soft-start via 0.6ms typical output rise time. Its current-limiting architecture uses an internal sense FET to trigger ILIMIT (2.1A) without external resistors, maintaining constant current during overload while reducing VOUT.
It integrates deglitched open-drain FLG reporting (7ms blanking), undervoltage lockout (1.9V threshold), and reverse-current blocking activated by VOUT > VIN. The discharge function activates on EN deassertion, routing output capacitance through a dedicated 100Ω internal NMOS path to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 2.1A typical - clamps sustained load current to prevent damage during short-circuit or overload. |
| RDS(ON) | 90mΩ max (U-DFN2018-6, 25°C, 5V IN) - minimizes conduction loss and self-heating at 1.5A continuous load. |
| Input Voltage Range | 2.7V–5.5V - supports full USB 2.0 bus voltage range including low-voltage brownout conditions. |
| Enable Polarity | Active-high - simplifies interface with microcontroller GPIOs without level-shifting or inversion logic. |
| FLG Blanking Time | 7ms typical - suppresses false fault reporting during inrush or capacitive load turn-on transients. |
| Discharge Resistance | 100Ω - enables predictable RC-based discharge of output capacitance when disabled (e.g., 120µF → <0.5V in ~0.6ms). |
| Shutdown Current | 1µA max - preserves system battery life in standby or suspend states. |
Pinout & Package
AP2191DSG-13 is packaged in U-DFN2018-6: 2.0mm × 1.8mm, 0.5mm pitch, exposed thermal pad (to be connected to GND plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference and thermal sink connection point for exposed pad. |
| 2 | IN | Main input voltage supply (2.7V–5.5V); ties directly to upstream USB VBUS or DC source. |
| 3 | EN | Active-high enable control; logic high ≥2V enables switch, low ≤0.8V disables with discharge activation. |
| 4 | FLG | Open-drain fault flag; pulled low during overcurrent or overtemperature events (7ms deglitch applied). |
| 5, 6 | OUT | Switched output node; connects to downstream USB port, load capacitor, and ESD protection network. |
Key Features
| Feature | Design Value |
|---|---|
| Output Discharge | Internal 100Ω NMOS discharge path activated on EN deassertion - eliminates need for external bleed resistor and ensures safe hot-removal. |
| Reverse Current Blocking | Automatic blocking when VOUT > VIN - prevents backfeed from powered peripherals into host supply during disconnect or fault. |
| UVLO Protection | 1.9V turn-on threshold with hysteresis - guarantees switch remains off until stable input is established, critical for robust hot-plug sequencing. |
| Thermal Shutdown | 140°C trip with 25°C hysteresis - cycles output on/off to limit junction temperature without latch-off, enabling self-recovery after fault removal. |
| ESD Robustness | 4kV HBM / 300V MM - meets IEC 61000-4-2 system-level ESD requirements for USB-facing interfaces. |
Applications
| USB 2.0 Port Power Switching | Laptop Docking Station Load Control |
|---|---|
|
Use Scenario: Individual USB-A port on ultrabook requiring independent overcurrent protection and hot-plug compliance. IC Role / Device Role / Timing Role: High-side power switch managing VBUS delivery with controlled 0.6ms rise time and 7ms fault blanking. Use Value: Prevents host system reset during peripheral insertion; eliminates need for external current-sense resistor or RC filter on FLG. |
Use Scenario: Power distribution to multiple downstream peripherals (HDD, Ethernet, HDMI) from a single USB-C dock. IC Role / Device Role / Timing Role: Channel-isolated load switch enabling per-port enable/disable and fault isolation. Use Value: Enables software-controlled port disable and automatic recovery after short-circuit events without manual reset. |
| Set-Top Box USB Peripheral Interface | Smartphone Charging Port Protection |
|
Use Scenario: USB host port on cable/satellite STB powering external storage or streaming dongles. IC Role / Device Role / Timing Role: Hot-swap power controller with UVLO and reverse-current blocking to prevent backfeed from powered HDDs. Use Value: Ensures stable operation across wide ambient range (−40°C to +85°C) and eliminates nuisance tripping on large electrolytic loads. |
Use Scenario: Secondary charging path in dual-role USB device supporting both data and power delivery negotiation. IC Role / Device Role / Timing Role: Isolation switch between VBUS and internal battery charging circuitry during OTG or accessory mode. Use Value: Blocks reverse current from battery to VBUS when host is disconnected, preserving battery charge and meeting USB-IF compliance. |
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 + power switch; 1.5A per port; no output discharge; requires external FLG filtering. | Designed for multi-port hub ICs, not discrete load switching; lacks standalone discharge and reverse-blocking. | Select only when hub functionality is required alongside power control - not a drop-in replacement for discrete switching. |
| TPS2051BDBVR | 1.5A current limit; 120mΩ RDS(ON); active-low enable; 10ms FLG blanking; no integrated discharge. | Requires external discharge circuit; higher on-resistance increases conduction loss at 1.5A. | Prefer when legacy active-low control is mandated and thermal budget allows higher RDS(ON). |
Compared with TUSB2036IRHBR and TPS2051BDBVR, AP2191DSG-13 offers superior integration for discrete USB port control - combining active-high enable, 100Ω discharge, 90mΩ RDS(ON), and reverse-current blocking in a 2.0×1.8mm U-DFN package, reducing BOM count and PCB area.
Availability
AP2191DSG-13 is available at Aetrix Electronics and suitable for USB 2.0 port protection, laptop docking station power management, and set-top box peripheral interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant "Green" packaging.
Supply support for AP2191DSG-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 AP2191D belongs to Diodes' USB Power Switch product line, engineered specifically for robust hot-swap implementation in space-constrained USB 2.0 endpoints - emphasizing low RDS(ON), precise current limiting, and integrated protection without external components.
FAQ
What is the maximum continuous load current supported by AP2191DSG-13?
The AP2191DSG-13 is rated for 1.5A maximum continuous load current under recommended operating conditions (TA ≤ +85°C, proper PCB thermal layout). Its 2.1A current limit is a fault-clamping threshold, not a sustained rating - continuous operation above 1.5A risks thermal shutdown due to power dissipation in the 90mΩ RDS(ON).
Does AP2191DSG-13 require external components for basic USB port protection?
No external components are required for core protection functions: current limiting, thermal shutdown, UVLO, reverse-current blocking, and FLG reporting all operate autonomously. A 0.1µF ceramic bypass capacitor on IN–GND is recommended for noise suppression, and output bulk capacitance (≥120µF) is advised for stability under heavy loads - but neither is mandatory for basic operation.
How does the 7ms FLG blanking time improve system reliability?
The 7ms FLG blanking time prevents false fault assertions during normal inrush events - such as charging a 120µF output capacitor at turn-on - which would otherwise trigger unnecessary system interrupts or shutdowns. This eliminates the need for external RC filters on the FLG line while maintaining fast response to genuine overcurrent or thermal faults.
Can AP2191DSG-13 be used in USB-C applications?
AP2191DSG-13 is specified for USB 2.0 compliance and supports up to 5.5V input, making it suitable for USB-C downstream data ports (DFP) delivering 5V power. However, it is not designed for USB-C power delivery (PD) negotiation, variable voltage, or CC-line signaling - use only for fixed 5V VBUS switching where full PD protocol handling is managed externally.
AP2191DSG-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):
- 1.5A
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
AP2191DSG-13 FAQ
1.How can I place an order for AP2191DSG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2191DSG-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 AP2191DSG-13 reliable?
The price and inventory of AP2191DSG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2191DSG-13 is usually 5 days.
3.What payment methods are accepted for AP2191DSG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2191DSG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2191DSG-13?
AP2191DSG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2191DSG-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 AP2191DSG-13?
For technical support, including AP2191DSG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2191DSG-13 requirements.
6.How does Aetrix verify that AP2191DSG-13 is sourced from the original manufacturer or authorized distributors?
All AP2191DSG-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 AP2191DSG-13 meets industry standards.
7.What is the process for return or replacement of AP2191DSG-13?
All AP2191DSG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2191DSG-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 AP2191DSG-13 part is unused and in its original packaging.
Return procedure for AP2191DSG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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