My Inquiry
My Account
Diodes Incorporated AP2191AW-7
- Part No.:
- AP2191AW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2191AW-7.pdf
- Description:
- IC PWR SWITCH P-CHAN 1:1 SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:45,081
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP2191AW-7 from Diodes Incorporated is a single-channel, active-high enable, high-side USB power switch with 2.1A current limiting, 95mΩ RDS(ON) at 5V, and integrated short-circuit/thermal protection. It operates from 2.7V to 5.5V input and delivers controlled 0.6ms rise time for hot-swap compliance in USB 2.0 downstream ports.
For engineers reviewing the AP2191AW-7 datasheet, AP2191AW-7 pinout, AP2191AW-7 application, or AP2191AW-7 equivalent, this device supports precise over-current fault reporting via 7ms deglitched open-drain FLG, reverse current blocking, and UVLO (1.9V threshold), making it critical for reliable USB port power management in consumer and embedded systems.
Technical Context
The AP2191AW-7 integrates a low-RDS(ON) N-channel MOSFET with internal current-sense FET architecture-eliminating external sense resistors-and employs thermal shutdown at +140°C with +25°C hysteresis. Its deglitched FLG output uses internal timing to suppress false triggers during capacitive load inrush.
It implements undervoltage lockout (UVLO) that disables the switch below ~1.9V and enables clean hot-plug sequencing. The active-high EN pin directly interfaces with USB host controllers or microcontroller GPIOs without level-shifting, and reverse current blocking prevents backfeed when VOUT > VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit | 2.1A typical - clamps sustained overload to prevent damage while maintaining regulated output voltage |
| RDS(ON) | 95mΩ max at 5V, +25°C - minimizes conduction loss and self-heating in SOT25 package |
| Input Voltage Range | 2.7V to 5.5V - supports full USB 2.0 bus range and accommodates brown-out conditions |
| Rise Time | 0.6ms typical - soft-starts loads to limit inrush current in hot-swap applications |
| FLG Blanking Time | 7ms typical - suppresses transient over-current events (e.g., capacitor charging) without external RC |
| Shutdown Current | 1µA max - enables ultra-low-power standby in battery-backed or always-on USB hubs |
| UVLO Threshold | 1.9V typical - ensures switch remains off until stable USB supply is established |
Pinout & Package
AP2191AW-7 is supplied in the SOT25 (SOT-23-5) surface-mount package with exposed pad for thermal enhancement. All pins are electrically defined per Diodes DS37618 Rev. 2–2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for power and logic; must be connected to PCB ground plane |
| IN | Power input | Connects to USB VBUS (2.7–5.5V); all IN pins tied together externally |
| EN | Enable control | Active-high logic input; drives internal driver stage to turn on MOSFET when ≥2.0V |
| FLG | Fault indicator | Open-drain output pulled low during over-current or over-temperature; requires external pull-up |
| OUT | Switched output | Delivers current-limited power to downstream load; all OUT pins tied together externally |
Key Features
| Feature | Design Value |
|---|---|
| Reverse current blocking | Prevents backfeed from loaded OUT to IN during power removal or fault - eliminates need for external diode |
| Integrated deglitch timer | 7ms internal blanking on FLG avoids false fault reporting during normal 100µF–120µF output capacitor charge |
| Thermal shutdown with hysteresis | +140°C trip with +25°C hysteresis enables safe auto-recovery in intermittent overload without latch-off |
| Low quiescent current | 70µA max enabled IQ allows use in always-on USB devices without significant standby drain |
| USB 2.0 compliance | Meets electrical and timing requirements for single-port downstream switching including rise/fall control and fault signaling |
Applications
| USB Host Port Protection | Self-Powered Hub Power Switching |
|---|---|
|
Use Scenario: Desktop PC or monitor with dedicated USB downstream port requiring over-current protection and hot-plug robustness. IC Role / Device Role / Timing Role: High-side power switch controlling VBUS delivery; enables/disables port power under host controller command with 0.6ms controlled ramp. Use Value: Prevents bus collapse during peripheral insertion and reports faults to USB controller via FLG, eliminating need for discrete current sensing and protection logic. |
Use Scenario: Standalone USB hub with local 5V supply powering four downstream ports, each requiring independent current limiting. IC Role / Device Role / Timing Role: Single-channel load switch per port; EN driven by hub controller to manage port enable/disable sequencing and isolate faulty peripherals. Use Value: Enables per-port current limiting (2.1A) and thermal protection without shared failure modes - improves system-level reliability and USB compliance. |
| Hot-Swap Module Interface | Dual-Function HDMI/MHL Charging Port |
|
Use Scenario: Industrial docking station accepting removable I/O modules while main system remains powered. IC Role / Device Role / Timing Role: Inrush current limiter and power sequencer; UVLO ensures switch stays off until module fully seated and VBUS stable. Use Value: Limits peak inrush to <1.5A during connection, protects main supply from transients, and provides FLG-based fault isolation for diagnostics. |
Use Scenario: Smart TV or set-top box with shared HDMI/MHL port delivering video and simultaneously charging smartphone battery. IC Role / Device Role / Timing Role: VBUS gatekeeper ensuring VIN ramps before enabling OUT - prevents backfeed and ensures MHL link stability during charge negotiation. Use Value: Blocks reverse current from phone battery into TV's 5V rail and maintains clean USB enumeration sequence even during concurrent charging/video streaming. |
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 |
|---|---|---|---|
| AP2181AW-7 | Active-low EN pin; identical current limit (2.1A), RDS(ON), and FLG behavior | Requires inverted enable signal from host controller; otherwise drop-in compatible in SOT25 layout | Select when system GPIO or USB controller outputs active-low enable signals |
| TCK112G,LF | 2.5A current limit; 65mΩ RDS(ON); 1.2ms rise time; no UVLO; different pinout (SOT-23-6) | Lacks UVLO and deglitch timing; requires external pull-up on FAULT; higher current rating suits heavier loads | Choose for higher current margin where UVLO and FLG blanking are handled elsewhere in system design |
Compared with AP2181AW-7, the AP2191AW-7 simplifies interface design with active-high EN, while TCK112G offers lower RDS(ON) and higher current but sacrifices integrated protection features - making AP2191AW-7 optimal for USB-compliant, space-constrained, and firmware-simple implementations.
Availability
AP2191AW-7 is available at Aetrix Electronics and suitable for USB host port protection, self-powered hub power switching, and hot-swap module interface applications requiring stable component supply and long-term industrial availability.
Supply support for AP2191AW-7 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 industrial, computing, and consumer markets.
The AP2191A product line targets USB 2.0-compliant hot-swap power distribution, delivering integrated current limiting, thermal protection, and fault reporting in compact packages for space-constrained portable and embedded systems.
FAQ
What is the maximum continuous load current supported by AP2191AW-7?
The AP2191AW-7 is rated for 1.5A maximum continuous load current per Diodes' Recommended Operating Conditions. Although its current-limit threshold is 2.1A, sustained operation above 1.5A risks thermal saturation in the SOT25 package due to θJA = 157°C/W - derating is required above +40°C ambient.
Does AP2191AW-7 require external components for basic USB port protection?
No external components are required for core functionality: the 7ms FLG deglitch timer, UVLO, and current limiting are fully internal. However, Diodes recommends a 0.1μF ceramic capacitor between IN and GND, plus a 120μF electrolytic capacitor on OUT for heavy loads - both improve transient immunity and inrush control per DS37618 Section 9.
How does the FLG pin behave during a short-circuit event?
During a short circuit, FLG goes low after a nominal 7ms deglitch period and remains low until both over-current and over-temperature conditions clear. If thermal shutdown activates, FLG stays asserted until junction temperature falls ~25°C below +140°C. FLG is open-drain and requires an external pull-up resistor (typically 10kΩ to 3.3V or 5V).
Can AP2191AW-7 be used in automotive USB applications?
AP2191AW-7 is specified for –40°C to +85°C ambient operation and meets USB 2.0 electrical requirements, but it is not AEC-Q200 qualified. For automotive infotainment or telematics USB ports, Diodes recommends verifying board-level thermal design and adding external TVS protection for ISO 7637-2 pulse suppression - the device itself lacks automotive-grade qualification or extended temperature range.
AP2191AW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- SC-74A, SOT-753
- 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:
- 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:
- SOT-25
AP2191AW-7 FAQ
1.How can I place an order for AP2191AW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2191AW-7 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 AP2191AW-7 reliable?
The price and inventory of AP2191AW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2191AW-7 is usually 5 days.
3.What payment methods are accepted for AP2191AW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2191AW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2191AW-7?
AP2191AW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2191AW-7 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 AP2191AW-7?
For technical support, including AP2191AW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2191AW-7 requirements.
6.How does Aetrix verify that AP2191AW-7 is sourced from the original manufacturer or authorized distributors?
All AP2191AW-7 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 AP2191AW-7 meets industry standards.
7.What is the process for return or replacement of AP2191AW-7?
All AP2191AW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2191AW-7, 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 AP2191AW-7 part is unused and in its original packaging.
Return procedure for AP2191AW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP2191AW-7 Tags
-
TPS22919DCKR
Texas Instruments
-
MIC2091-1YM5-TR
Microchip Technology
-
MIC2090-1YM5-TR
Microchip Technology
-
TPS22995RZFR
Texas Instruments
-
TPS22975DSGR
Texas Instruments
-
SIP32510DT-T1-GE3
Vishay Siliconix
-
ULN2003D1013TR
STMicroelectronics
-
MIC2005A-1YM5-TR
Microchip Technology
-
MIC2005A-1YM6-TR
Microchip Technology
-
TPS22916BYFPR
Texas Instruments
-
TPS22917DBVR
Texas Instruments
-
ULN2003APWR
Texas Instruments
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
