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Diodes Incorporated AP22818BKWT-7
- Part No.:
- AP22818BKWT-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AP22818BKWT-7.pdf
- Description:
- USB POWER SWITCH TSOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,282
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Product details
Overview
AP22818BKWT-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), integrated output discharge, reverse-current blocking, and 6ms deglitched fault reporting. It operates from 2.7V to 5.5V input, supports active-low enable, and delivers controlled 2.1ms typical rise time in TSOT25 package for notebook and SSD power sequencing.
For engineers reviewing the AP22818BKWT-7 datasheet, AP22818BKWT-7 pinout, AP22818BKWT-7 application, or AP22818BKWT-7 equivalent, key selection criteria include current rating (2.0A), thermal shutdown threshold (+150°C), UVLO hysteresis (180mV), soft-start timing, and FLG open-drain behavior with blanking - all critical for robust USB port protection and power-up sequencing in portable electronics.
Technical Context
The AP22818BKWT-7 implements a thermally protected N-channel MOSFET high-side switch with bi-directional current sensing and integrated discharge FET. Its overcurrent protection uses internal sense-FET architecture (no external resistor) to clamp output at 2.7A typical during short-circuit events while maintaining auto-recovery.
It integrates UVLO with 2.3V turn-on threshold and 180mV hysteresis, reverse-voltage detection triggering at 70mV (VOUT–VIN) with 5ms response, and thermal shutdown at +150°C with +40°C hysteresis - enabling autonomous fault recovery without host intervention in embedded USB power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 2.0A - Sustains full-rated load without derating at +25°C ambient in TSOT25 |
| RDS(ON) | 75mΩ max - Limits I²R loss to ≤300mW at 2A, enabling compact thermal design |
| Input Voltage Range | 2.7V to 5.5V - Matches USB 2.0/3.0 VBUS and portable system rail requirements |
| Enable Polarity | Active-Low (B version) - Directly interfaces with standard GPIOs asserting low to activate power |
| FLG Blanking Time | 6ms typ. - Suppresses false fault reports during capacitive inrush transients |
| Output Discharge Resistance | 140Ω typ. - Ensures <0.4ms discharge of 1µF load to <0.5V, preventing backfeed |
| UVLO Threshold | 2.3V rising / 2.12V falling - Prevents erratic switching during brown-out or hot-plug insertion |
| Thermal Shutdown | +150°C with +40°C hysteresis - Enables safe cycling under sustained overload without latch-off |
Pinout & Package
AP22818BKWT-7 is housed in a RoHS-compliant, lead-free TSOT25 (SOT-25) package - 2.9mm × 1.6mm × 0.8mm, moisture sensitivity level 1, matte tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power Ground Reference | Primary return path for switch current and internal bias; must connect to low-impedance ground plane |
| 2 EN | Active-Low Enable Input | Drives internal driver when pulled low; logic-high (>1.5V) disables output and activates discharge |
| 3 OUT | Switched Output Terminal | Delivers regulated 2.0A to load; requires 0.1µF ceramic + ≥10µF bulk capacitor per USB spec |
| 4 IN | Input Power Supply | Accepts 2.7–5.5V; requires 1µF X7R ceramic bypass placed within 2mm of pin |
| 5 FLG | Open-Drain Fault Flag | Asserts low on overcurrent/overtemperature after 6ms blanking; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Output Discharge | 140Ω discharge path ensures rapid, controlled VOUT collapse (<0.4ms for 1µF), eliminating backfeed risk |
| Reverse-Voltage Protection | 70mV trip point blocks >350mA reverse current, protecting upstream supplies during hot-swap disconnect |
| Auto-Recovering Protections | Overcurrent, short-circuit, and overtemperature faults self-clear once condition resolves - no reset required |
| Soft-Start Control | 0.6ms typical rise time limits inrush dI/dt, preventing input rail droop and EMI spikes in dense PCB layouts |
| ESD Robustness | 2kV HBM / 500V CDM rating enables direct integration into exposed USB ports without external protection |
Applications
| USB 3.0 Port Power Switching | SSD Power Sequencing |
|---|---|
Use Scenario: Hot-plug insertion of USB peripherals into ultrabook or docking station ports. IC Role / Device Role / Timing Role: High-side load switch controlling VBUS delivery with reverse-current blocking and fast fault response. Use Value: Prevents bus voltage collapse during plug-in, eliminates backfeed into host supply, and reports faults via FLG before damage occurs. | Use Scenario: Controlled power-up/down of SATA or NVMe SSD modules in thin client systems. IC Role / Device Role / Timing Role: Load switch enforcing clean power ramp with soft-start and output discharge during reset. Use Value: Eliminates residual charge hold-up that causes SSD firmware hang; ensures deterministic reset timing across temperature. |
| Notebook Subsystem Isolation | Set-Top Box USB Hub Management |
Use Scenario: Independent power control of camera, audio codec, or Wi-Fi module in clamshell laptops. IC Role / Device Role / Timing Role: Low-RDS(ON) power gate enabling dynamic subsystem sleep/wake with minimal quiescent loss. Use Value: Reduces system standby current by >80µA per switched rail versus discrete FET + controller solutions. | Use Scenario: Per-port power management in multi-device USB hubs embedded in IPTV set-top boxes. IC Role / Device Role / Timing Role: Current-limited switch providing individual port overcurrent protection and status flagging. Use Value: Enables host MCU to identify and disable faulty downstream devices without resetting entire hub. |
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 |
|---|---|---|---|
| TPS22916BLYR | 1.5A rating, 85mΩ RDS(ON), no integrated discharge FET | Lacks output discharge; requires external RC network for VOUT collapse | Choose when lower cost outweighs need for autonomous discharge and higher current headroom is unnecessary |
| RT9742AGQW | 2.5A rating, 55mΩ RDS(ON), active-high enable only, no reverse-voltage protection | Missing reverse-current blocking; unsuitable for hot-swap where VOUT may exceed VIN | Prefer when maximum efficiency is critical and system topology guarantees VOUT ≤ VIN at all times |
Compared with TPS22916BLYR and RT9742AGQW, AP22818BKWT-7 uniquely combines 2.0A current capability, integrated discharge, reverse-voltage protection, and active-low enable in a 5-pin TSOT25 - making it optimal for space-constrained USB and SSD applications requiring full fault autonomy without external components.
Availability
AP22818BKWT-7 is available at Aetrix Electronics and suitable for notebook power sequencing, USB 3.0 port protection, and SSD subsystem isolation requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for AP22818BKWT-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.
The AP22816/17/18 family targets USB-compliant hot-swap and load-switching applications, delivering integrated protection, soft-start, and fault reporting in ultra-small packages for portable and space-constrained electronics.
FAQ
What is the function of the FLG pin on AP22818BKWT-7?
The FLG pin is an open-drain fault flag that asserts low (≤0.4V) when overcurrent, short-circuit, or overtemperature conditions occur - after a 6ms deglitch timeout. It remains low until both fault conditions clear, and requires an external pull-up resistor (typically 10kΩ) to VIN or system IOVDD. This enables host microcontrollers to detect and log faults without polling.
Does AP22818BKWT-7 require external components for basic operation?
No external components are required for core switching functionality. However, per datasheet recommendations: a 1µF ceramic capacitor must be placed between IN and GND, a 0.1µF ceramic plus ≥10µF bulk capacitor between OUT and GND, and a pull-up resistor on FLG. These ensure stable operation, inrush control, reverse-voltage immunity, and fault reporting - all validated in USB-compliant designs.
How does the AP22818BKWT-7 handle reverse current flow?
AP22818BKWT-7 blocks reverse current by detecting when VOUT exceeds VIN by ≥70mV for ≥5ms, then turning off the internal MOSFET. This prevents backfeed from powered peripherals into the host supply during hot-unplug. Reverse leakage is limited to 0.01µA typical when disabled, and the device resumes normal operation automatically once VOUT ≤ VIN + 35mV.
Can AP22818BKWT-7 be used in automotive applications?
AP22818BKWT-7 is not AEC-Q100 qualified and is specified for industrial temperature range (−40°C to +85°C). While its electrical performance meets many automotive subsystem requirements, Diodes Incorporated explicitly states that automotive-grade variants - with PPAP capability, IATF 16949 manufacturing, and AEC-Q100 qualification - require direct engagement with their automotive sales team and are not represented by this part number.
AP22818BKWT-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:
- 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:
- Non-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-23-5
AP22818BKWT-7 FAQ
1.How can I place an order for AP22818BKWT-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP22818BKWT-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 AP22818BKWT-7 reliable?
The price and inventory of AP22818BKWT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP22818BKWT-7 is usually 5 days.
3.What payment methods are accepted for AP22818BKWT-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP22818BKWT-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP22818BKWT-7?
AP22818BKWT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP22818BKWT-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 AP22818BKWT-7?
For technical support, including AP22818BKWT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP22818BKWT-7 requirements.
6.How does Aetrix verify that AP22818BKWT-7 is sourced from the original manufacturer or authorized distributors?
All AP22818BKWT-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 AP22818BKWT-7 meets industry standards.
7.What is the process for return or replacement of AP22818BKWT-7?
All AP22818BKWT-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP22818BKWT-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 AP22818BKWT-7 part is unused and in its original packaging.
Return procedure for AP22818BKWT-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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