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Diodes Incorporated AP22818BKAWT-7
- Part No.:
- AP22818BKAWT-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AP22818BKAWT-7.pdf
- Description:
- USBPOWERSWITCHTSOT25T&R3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,940
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Product details
Overview
AP22818BKAWT-7 from Diodes Incorporated is a 2.0A single-channel high-side load switch optimized for USB and hot-swap applications, featuring 75mΩ RDS(ON), 2.7V–5.5V input range, integrated output discharge, reverse-current blocking, and auto-recovery overcurrent/overtemperature protection. It delivers controlled power sequencing in ultrabooks and SSDs with 0.6ms typical rise time and 6ms FLG deglitch.
For engineers reviewing the AP22818BKAWT-7 datasheet, AP22818BKAWT-7 pinout, AP22818BKAWT-7 application, or AP22818BKAWT-7 equivalent, this page provides verified technical context, real-world timing behavior, thermal recovery hysteresis, fault flag timing constraints, and validated alternative selection guidance for USB-compliant power distribution designs.
Technical Context
The AP22818BKAWT-7 implements an N-channel MOSFET high-side switch with bi-directional current sensing and thermal shutdown at +150°C (±40°C hysteresis). Its UVLO activates at 2.3V (rising) with 180mV hysteresis, ensuring stable turn-on only after input rail stabilization.
It integrates a dedicated discharge FET (RDIS = 170Ω typ.) activated on disable, and uses a deglitched open-drain FLG output (6ms blanking) to distinguish transient inrush from true overcurrent events-no external RC filtering required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current Rating | 2.0A continuous - supports USB 3.x bus-powered peripherals and SSD VCC rails without derating at +85°C ambient. |
| RDS(ON) | 75mΩ max @ 25°C - limits conduction loss to ≤300mW at 2A, enabling TSOT25 package use in space-constrained USB ports. |
| Input Voltage Range | 2.7V to 5.5V - compatible with Li-ion battery-backed systems (3.3V/5V logic) and legacy USB 2.0/3.0 host supplies. |
| FLG Blanking Time | 6ms typ. - suppresses false fault reporting during capacitor inrush (e.g., 120μF SSD bulk cap charging), eliminating need for external debounce circuitry. |
| Reverse Current Blocking | Active at VOUT – VIN ≥ 70mV - prevents backfeed from downstream circuits during hot-plug removal or supply brownout. |
| Thermal Shutdown Threshold | +150°C with +40°C hysteresis - enables safe thermal cycling under sustained short-circuit (e.g., 500mA short-circuit current limit) without latch-off. |
| Turn-On Rise Time | 2.1ms typ. @ 3.3V - ensures controlled voltage ramp for sensitive loads (e.g., USB PHYs), avoiding overshoot-induced reset. |
Pinout & Package
AP22818BKAWT-7 is housed in a RoHS-compliant, lead-free TSOT25 (SOT-25) package with matte tin-plated leads solderable per MIL-STD-202 Method 208 (e3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference for internal bias and thermal sensing - must be connected to low-impedance system ground plane. |
| 2 | EN | Active-high enable input - driven by 1.5V–5.5V GPIO; floating state disables output; no pull-up required. |
| 3 | OUT | Switched output node - requires 0.1μF ceramic + ≥10μF bulk capacitor to GND for USB compliance and short-circuit immunity. |
| 4 | IN | Input power rail connection - bypassed with 1μF X7R ceramic close to pin; supports 2.7V–5.5V USB and battery sources. |
| 5 | FLG | Open-drain fault flag - pulls low during overcurrent/overtemperature events after 6ms deglitch; requires external pull-up resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Output Discharge | 170Ω discharge path (typ.) - fully discharges 100μF output caps within 0.4ms, preventing residual voltage from interfering with downstream power sequencing. |
| Auto-Recovery Protection | Overcurrent, short-circuit, and overtemperature faults self-clear once condition resolves - eliminates manual reset requirement in embedded USB hubs. |
| Reverse-Voltage Comparator | 70mV trip threshold with 6ms delay - blocks backfeed from powered peripherals (e.g., USB-C DRP ports) before damaging upstream regulators. |
| Soft-Start Control | 0.6ms typical rise time - eliminates inrush current spikes >3A during hot-plug, satisfying USB 3.0 VBUS slew rate requirements. |
| UVLO Hysteresis | 180mV - prevents oscillation near 2.3V turn-on threshold during battery discharge or weak adapter conditions. |
Applications
| Ultrabook Power Sequencing | USB 3.x Bus-Powered Peripherals |
|---|---|
|
Use Scenario: Controlled power-up of PCIe SSDs and Thunderbolt controllers during resume-from-sleep in thin-and-light laptops. IC Role / Device Role / Timing Role: High-side load switch managing VCC power delivery with soft-start and reverse-current blocking during hot-plug transitions. Use Value: Prevents 120μF SSD bulk cap inrush from collapsing 3.3V rail; FLG alerts system controller of sustained overload without false triggers. |
Use Scenario: Power management for externally powered USB audio interfaces, docking stations, and multi-port hubs. IC Role / Device Role / Timing Role: Hot-swap protection IC enforcing USB specification current limits and providing fault visibility via FLG signal. Use Value: Enables automatic current limiting at 2.0A (not just shutdown), sustaining operation during brief overloads while protecting host port. |
| Solid-State Drive (SSD) VCC Switching | Set-Top Box USB Port Protection |
|
Use Scenario: Isolating 5V VCC rail to M.2 SATA/NVMe SSD modules during insertion/removal in consumer media players. IC Role / Device Role / Timing Role: Load switch with integrated discharge function ensuring complete VCC ramp-down before mechanical disconnect. Use Value: Eliminates need for discrete discharge FET and RC network; 0.4ms discharge time meets SATA Link Power Management (LPM) exit timing. |
Use Scenario: Protecting USB host ports in cable/satellite set-top boxes against shorted accessories and ESD-induced latch-up. IC Role / Device Role / Timing Role: Robust power distribution switch with 2kV HBM/500V CDM ESD rating and thermal cycling capability. Use Value: Sustains operation under repeated short-circuit faults (e.g., damaged USB cables) without requiring field replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCK107AG,3 | 1.5A rating, 90mΩ RDS(ON), no integrated discharge FET, 10ms FLG blanking | Lacks output discharge; requires external 10kΩ pull-down for safe VOUT ramp-down in SSD applications | Select when lower cost is critical and discharge is handled externally; not suitable for USB hot-plug where fast discharge is mandatory. |
| TPS22916BQDBVR | 2A rating, 50mΩ RDS(ON), 1.8V–5.5V input, no reverse-voltage protection, 10ms FLG blanking | Missing reverse-current blocking - risks backfeed in dual-power domains (e.g., battery + USB OTG) | Prefer for ultra-low-loss 3.3V-only systems; avoid in USB-C DRP or battery-backed designs requiring bidirectional isolation. |
Compared with TCK107AG,3 and TPS22916BQDBVR, AP22818BKAWT-7 uniquely combines 2.0A capacity, integrated discharge, reverse-voltage blocking, and USB-optimized 6ms FLG blanking in a TSOT25 footprint-making it the only choice for compact, standards-compliant hot-swap power switching where all four functions are required.
Availability
AP22818BKAWT-7 is available at Aetrix Electronics and suitable for ultrabook power sequencing, USB 3.x peripheral protection, and SSD VCC switching requiring stable component supply, full RoHS compliance, and guaranteed long-term lifecycle support.
Supply support for AP22818BKAWT-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 power management, signal integrity, and protection solutions for consumer, computing, and industrial markets.
The AP22818BKAWT-7 belongs to Diodes' AP228xx family of USB-compliant load switches, engineered specifically for hot-swap robustness, minimal board area, and seamless integration into space-constrained portable electronics.
FAQ
What is the logic polarity of the EN pin on AP22818BKAWT-7?
The "B" suffix in AP22818BKAWT-7 denotes active-low enable functionality: the device turns ON when EN is pulled low (≤0.5V) and OFF when EN is high (≥1.5V). This matches common PMIC control signaling in ultrabook platforms and eliminates need for level-shifting inverters.
Does AP22818BKAWT-7 require external components for overcurrent protection?
No external components are required for overcurrent protection. The device integrates a current-sense FET and 6ms deglitch timer on the FLG output, enabling reliable fault detection during capacitor inrush without added resistors or capacitors-verified per USB 3.0 hot-plug test conditions.
How does the output discharge function operate during disable?
When EN is de-asserted, an internal 170Ω (typ.) discharge FET connects OUT to GND, fully discharging a 100μF output capacitor to <0.5V in ≤0.4ms. This ensures clean power-down for USB enumeration and prevents residual voltage from powering downstream logic unintentionally.
Can AP22818BKAWT-7 be used in automotive infotainment USB ports?
AP22818BKAWT-7 is not AEC-Q100 qualified and lacks automotive-grade qualification documentation. While its -40°C to +85°C operating range covers cabin temperatures, Diodes recommends contacting their automotive team for PPAP-capable variants like AP22818W5-7 (AEC-Q100 Grade 2) for production automotive use.
AP22818BKAWT-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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:
- N/P-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 2A
- Rds On (Typ):
- 75mOhm
- Input Type:
- Inverting
- Features:
- Load Discharge, Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, Reverse Current, Short Circuit, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-25
AP22818BKAWT-7 FAQ
1.How can I place an order for AP22818BKAWT-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP22818BKAWT-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 AP22818BKAWT-7 reliable?
The price and inventory of AP22818BKAWT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP22818BKAWT-7 is usually 5 days.
3.What payment methods are accepted for AP22818BKAWT-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP22818BKAWT-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP22818BKAWT-7?
AP22818BKAWT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP22818BKAWT-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 AP22818BKAWT-7?
For technical support, including AP22818BKAWT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP22818BKAWT-7 requirements.
6.How does Aetrix verify that AP22818BKAWT-7 is sourced from the original manufacturer or authorized distributors?
All AP22818BKAWT-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 AP22818BKAWT-7 meets industry standards.
7.What is the process for return or replacement of AP22818BKAWT-7?
All AP22818BKAWT-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP22818BKAWT-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 AP22818BKAWT-7 part is unused and in its original packaging.
Return procedure for AP22818BKAWT-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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