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Diodes Incorporated AP22818AKWT-7
- Part No.:
- AP22818AKWT-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AP22818AKWT-7.pdf
- Description:
- USB POWER SWITCH TSOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,800
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Product details
Overview
AP22818AKWT-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 active-low enable. It delivers controlled power sequencing in ultrabooks and SSDs with 6ms FLG deglitching and thermal auto-recovery.
For engineers reviewing the AP22818AKWT-7 datasheet, AP22818AKWT-7 pinout, AP22818AKWT-7 application, or AP22818AKWT-7 equivalent, this device supports precise current-limited power distribution with fault reporting, soft-start rise time control, and robust overcurrent/overtemperature protection in space-constrained TSOT25 designs.
Technical Context
The AP22818AKWT-7 integrates an N-channel MOSFET with current-sense FET architecture to enable accurate overcurrent detection without external resistors. Its UVLO threshold (2.3V typ.) and 180mV hysteresis ensure stable turn-on during input ramp-up, while reverse-voltage protection triggers at 70mV (typ.) between VOUT and VIN.
Thermal shutdown activates at +150°C with +40°C hysteresis, enabling safe cycling under sustained short-circuit conditions. The open-drain FLG pin asserts low after 6ms deglitch timeout for both overcurrent and overtemperature events, eliminating false trips from capacitive inrush transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current Rating | 2.0A continuous - supports high-capacitance USB loads and SSD power rails without derating at +25°C. |
| RDS(ON) | 75mΩ max at 5V - minimizes conduction loss and self-heating in 2.0A operation. |
| Input Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V system rails, including USB 2.0/3.0 bus voltages. |
| Enable Polarity | Active-low (K suffix) - interfaces directly with standard GPIOs without level-shifting. |
| FLG Blanking Time | 6ms typical - suppresses false fault reporting during capacitor charging transients. |
| Discharge Resistance | 140–200Ω - ensures rapid, controlled VOUT discharge (<0.4ms for 1µF) when disabled. |
| UVLO Threshold | 2.3V rising / 2.12V falling - prevents erratic switching during brown-out or hot-plug insertion. |
Pinout & Package
AP22818AKWT-7 is housed in a RoHS-compliant, lead-free TSOT25 (SOT-25) package with matte tin-plated leads, rated Moisture Sensitivity Level 1 per J-STD-020 and thermally optimized for surface-mount assembly on FR-4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Low-impedance return path for internal circuitry and power switch; must be connected to system ground plane. |
| EN | Enable control input | Active-low logic input; pulls low to disable switch and activate discharge path; requires no pull-up for default-off behavior. |
| OUT | Switched output | Drives downstream load; requires 0.1µF ceramic + ≥10µF bulk capacitance for USB compliance and transient immunity. |
| IN | Power input | Accepts 2.7–5.5V supply; requires 1µF X7R/X5R ceramic bypass placed adjacent to pin. |
| FLG | Fault reporting output | Open-drain flag asserted low during overcurrent or overtemperature events; 30–60Ω on-resistance enables direct MCU interrupt connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Output Discharge | 140–200Ω internal discharge path ensures <0.4ms VOUT decay to <0.5V, preventing backfeed and enabling clean power-down sequencing. |
| Reverse-Current Blocking | Blocks >350mA reverse current when VOUT exceeds VIN by ≥35mV, protecting upstream supplies in multi-rail systems. |
| Auto-Recovery Protection | Overcurrent, short-circuit, and overtemperature faults trigger automatic recovery after fault removal-no manual reset required. |
| Controlled Rise Time | 2.1ms typical tR at 3.3V - limits inrush current to prevent input rail droop and system instability during hot-swap. |
| Thermal Robustness | RθJA = 123°C/W (TSOT25) enables 2.0A operation up to +85°C ambient without external heatsinking. |
Applications
| Ultrabook Power Sequencing | USB 3.0 Port Switching |
|---|---|
Use Scenario: Controlled power-up/down of USB peripherals and display modules in thin-client laptops with tight thermal budgets. IC Role / Device Role / Timing Role: High-side load switch managing 5V rail delivery with soft-start and fault isolation between host controller and peripheral. Use Value: Prevents bus voltage collapse during hot-plug via 2.1ms controlled rise time and eliminates backfeed with reverse-current blocking. | Use Scenario: Enabling/disabling individual USB 3.0 ports in docking stations with real-time fault monitoring. IC Role / Device Role / Timing Role: Current-limited power gate with FLG-driven MCU interrupt for port-level overcurrent detection and recovery. Use Value: 6ms FLG deglitch avoids false tripping during 120µF port capacitor charge; auto-recovery restores port function without host intervention. |
| SSD Power Management | Set-Top Box Rail Control |
Use Scenario: Isolating 3.3V/5V power domains in NVMe SSD modules during sleep/wake transitions. IC Role / Device Role / Timing Role: Load switch providing fast turn-off (<20µs tD(OFF)) and complete VOUT discharge for low-power retention states. Use Value: Integrated 140–200Ω discharge path ensures <0.4ms VOUT decay, meeting NVMe P1/P2 state timing requirements. | Use Scenario: Managing auxiliary 5V rails for HDMI, tuner, and Ethernet PHYs in consumer STBs with high reliability demands. IC Role / Device Role / Timing Role: Protected power distributor delivering 2.0A with overtemperature cycling and reverse-voltage trip at 70mV. Use Value: Thermal hysteresis (+40°C) and UVLO (2.3V) prevent latch-up during brown-out events and ensure graceful shutdown during AC loss. |
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 |
|---|---|---|---|
| AP22818MWX-7 | Same electrical specs; MSOP-8 package (vs. TSOT25), higher RθJA (165°C/W), larger footprint. | Preferred where board space allows larger package and thermal relief via exposed pad soldering. | Select for higher thermal margin in industrial environments; avoid in ultra-thin portable designs. |
| TCK10AG30X | 2.0A rating, 85mΩ RDS(ON), 1.8–5.5V input, but lacks integrated discharge and reverse-current blocking. | Requires external discharge resistor and diode for reverse protection; adds BOM cost and layout complexity. | Choose only if lower RDS(ON) is secondary to cost-sensitive, non-USB applications without reverse-voltage risk. |
Compared with AP22818MWX-7, the AP22818AKWT-7 offers superior thermal performance in compact form factor, while TCK10AG30X trades integrated protections for marginal conduction loss reduction-making AP22818AKWT-7 optimal for USB-compliant, space-constrained hot-swap systems requiring full fault coverage.
Availability
AP22818AKWT-7 is available at Aetrix Electronics and suitable for ultrabook power sequencing, USB 3.0 port management, and SSD power domain isolation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP22818AKWT-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 solutions, with emphasis on power management, signal integrity, and protection devices.
The AP22818 belongs to Diodes' high-performance load switch product line, engineered specifically for USB-compliant hot-swap and power sequencing in portable computing and storage systems.
FAQ
What is the maximum continuous output current for AP22818AKWT-7 at +85°C ambient?
The AP22818AKWT-7 sustains 2.0A continuous output current at +85°C ambient when mounted on a standard 1"×1" FR-4 board with 2oz copper, leveraging its 75mΩ RDS(ON) and 123°C/W thermal resistance to maintain junction temperature below +150°C.
Does AP22818AKWT-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 pin, enabling reliable fault detection without sense resistors or RC filters-verified per DS43535 Rev. 3-2 test conditions.
How does the reverse-voltage protection function in AP22818AKWT-7?
When VOUT exceeds VIN by ≥35mV for ≥2ms, the internal comparator disables the MOSFET within 5ms (typ.), blocking reverse current up to 350mA. Recovery occurs automatically once VOUT ≤ VIN + 15mV, with no latch or manual reset needed.
Can AP22818AKWT-7 be used in automotive applications?
The AP22818AKWT-7 is not AEC-Q100 qualified. For automotive use, Diodes recommends contacting their sales team for PPAP-capable, IATF 16949-manufactured alternatives-this part is validated for commercial-grade computing, storage, and consumer electronics only.
AP22818AKWT-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
AP22818AKWT-7 FAQ
1.How can I place an order for AP22818AKWT-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP22818AKWT-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 AP22818AKWT-7 reliable?
The price and inventory of AP22818AKWT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP22818AKWT-7 is usually 5 days.
3.What payment methods are accepted for AP22818AKWT-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP22818AKWT-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP22818AKWT-7?
AP22818AKWT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP22818AKWT-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 AP22818AKWT-7?
For technical support, including AP22818AKWT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP22818AKWT-7 requirements.
6.How does Aetrix verify that AP22818AKWT-7 is sourced from the original manufacturer or authorized distributors?
All AP22818AKWT-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 AP22818AKWT-7 meets industry standards.
7.What is the process for return or replacement of AP22818AKWT-7?
All AP22818AKWT-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP22818AKWT-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 AP22818AKWT-7 part is unused and in its original packaging.
Return procedure for AP22818AKWT-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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