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Diodes Incorporated AP22818AKAWT-7
- Part No.:
- AP22818AKAWT-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AP22818AKAWT-7.pdf
- Description:
- USBPOWERSWITCHTSOT25T&R3K
- Quantity:
- Payment:
- Shipping:
Inventory:8,479
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Product details
Overview
AP22818AKAWT-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 logic in a TSOT25 package. It delivers controlled power sequencing in ultrabooks and SSDs with fast short-circuit response and 6ms deglitch on the FLG pin.
For engineers reviewing the AP22818AKAWT-7 datasheet, AP22818AKAWT-7 pinout, AP22818AKAWT-7 application, or AP22818AKAWT-7 equivalent, this device supports precise current-limited power distribution where overcurrent auto-recovery, thermal shutdown at +150°C, and reverse-voltage protection down to 35mV trip point are critical selection criteria.
Technical Context
The AP22818AKAWT-7 integrates an N-channel MOSFET with current-sense FET architecture for accurate overcurrent detection without external resistors, enabling ILIMIT = 2.2–3.2A (typ. 2.7A) at VIN = 5V and VOUT = 4.5V. Its UVLO threshold is 2.3V (rising) with 180mV hysteresis, ensuring reliable turn-on only after stable rail establishment.
Thermal protection uses die-temperature sensing with +150°C shutdown and +40°C hysteresis, cycling until fault removal. The FLG pin provides open-drain fault reporting with 6ms blanking time, suppressing false triggers during capacitive inrush - no external RC filtering required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 2.0A max - supports high-capacitance USB loads (e.g., 120μF SSD rails) without derating at TA ≤ +85°C |
| RDS(ON) | 75mΩ typ. @ VIN=5V, IOUT=1A - minimizes conduction loss (≤75mW at 1A), enabling compact thermal design in TSOT25 |
| Input Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V system rails, including USB 2.0/3.0 VBUS |
| Enable Logic | Active-low (EN) - direct interface with 3.3V GPIO without level-shifting; VIH ≥1.5V, VIL ≤0.5V |
| FLG Blanking Time | 6ms typ. - suppresses transient overcurrent events (e.g., 100μF capacitor inrush) without external components |
| Reverse-Voltage Trip | 35–105mV (VOUT–VIN) - blocks backfeed from powered peripherals into host supplies, protecting upstream regulators |
| Discharge Resistance | 140–200Ω - actively discharges output capacitance to <0.5V in ≤0.4ms when disabled, preventing floating bus states |
Pinout & Package
AP22818AKAWT-7 is housed in a RoHS-compliant, lead-free TSOT25 (SOT-25) package - thermally efficient, moisture sensitivity level 1, matte tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference for internal circuitry and thermal path; must be low-impedance connection to PCB ground plane |
| 2 | FLG | Open-drain fault flag - pulled low during overcurrent/overtemperature; requires external pull-up for system interrupt signaling |
| 3 | OUT | Switched output - connects to load; requires 0.1μF ceramic + ≥10μF bulk capacitor to GND for stability and short-circuit immunity |
| 4 | IN | Input supply rail - connect 1μF X7R ceramic capacitor directly to GND; recommended 10μF+ for heavy transient loads |
| 5 | EN | Active-low enable - drive low to turn ON the switch; must not float; tie to GND via 100kΩ if unused |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Output Discharge | 140–200Ω internal discharge path ensures rapid, controlled VOUT collapse (<0.4ms to <0.5V) upon disable - eliminates need for external bleed resistor |
| Auto-Recovery Protections | Overcurrent, short-circuit, and overtemperature faults self-clear once condition resolves - no manual reset required for system resilience |
| Reverse-Current Blocking | Prevents backflow from VOUT to VIN when VOUT > VIN by ≥35mV - protects upstream power sources in multi-rail systems |
| Soft-Start Control | 0.6ms typical rise time limits inrush current - enables safe hot-plug of 120μF loads without tripping upstream fuses |
| UVLO with Hysteresis | 2.3V turn-on / 2.12V turn-off (180mV hysteresis) - prevents oscillation during brown-out and ensures clean power-up sequencing |
Applications
| Ultrabook Power Sequencing | USB 3.0 Port Protection |
|---|---|
|
Use Scenario: Controlled power-up/down of PCIe SSDs and USB peripherals during sleep/wake transitions in thin-client laptops. IC Role / Device Role / Timing Role: High-side load switch managing 5V VBUS delivery with soft-start and reverse-current blocking. Use Value: Prevents bus contention and inrush-induced voltage droop during hot-plug, ensuring compliance with USB 3.0 electrical specifications. |
Use Scenario: Isolating downstream USB devices from host controller during enumeration or fault conditions. IC Role / Device Role / Timing Role: Current-limited power gate with 6ms FLG deglitch to reject false overcurrent reports from cable insertion transients. Use Value: Enables robust plug/unplug cycles without host firmware intervention or system-level resets. |
| Solid-State Drive (SSD) Power Management | Set-Top Box Peripheral Control |
|
Use Scenario: Enabling/disabling 5V power to NAND flash modules and controller ICs in consumer SSDs. IC Role / Device Role / Timing Role: Load switch providing 2.0A continuous current, reverse-voltage protection, and thermal cycling tolerance. Use Value: Eliminates risk of backfeed damage when SSD is removed while system remains powered, extending field reliability. |
Use Scenario: Managing auxiliary 3.3V/5V rails for HDMI CEC, IR receivers, and USB hubs in media streaming boxes. IC Role / Device Role / Timing Role: Single-channel power distributor with undervoltage lockout and fault-flag reporting to SoC. Use Value: Allows SoC to detect and log overcurrent events (e.g., shorted HDMI port), enabling graceful degradation instead of full-system shutdown. |
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 |
|---|---|---|---|
| AP22818WKAWT-7 | Same silicon, active-high enable (EN) instead of active-low (EN) | Requires inverted GPIO control signal; identical protection features and timing | Select when host MCU GPIO defaults to high or lacks open-drain capability |
| TCK107AG,LF | 2.5A rating, 50mΩ RDS(ON), 1.8–6.0V input, but no integrated discharge function | Lacks output discharge path - requires external 100kΩ resistor to meet same VOUT discharge spec | Choose for lower conduction loss in space-constrained designs where board area permits external discharge component |
Compared with AP22818AKAWT-7, AP22818WKAWT-7 simplifies control logic for non-inverting drivers, while TCK107AG offers higher current headroom and lower RDS(ON) at the cost of added BOM count and layout complexity for discharge.
Availability
AP22818AKAWT-7 is available at Aetrix Electronics and suitable for ultrabook power sequencing, USB 3.0 port protection, and SSD power management requiring stable component supply across industrial and consumer production ramps.
Supply support for AP22818AKAWT-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 manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q standards.
The AP22816/17/18 family targets USB-compliant hot-swap and power-distribution applications, delivering integrated protection and sequencing in ultra-small packages for space-constrained portable electronics.
FAQ
What is the maximum capacitive load the AP22818AKAWT-7 can safely drive during turn-on?
The AP22818AKAWT-7 supports up to 470μF output capacitance with controlled inrush, as validated in the datasheet's performance curves. For USB applications, ≥10μF is mandatory; 120μF is typical for SSDs. Exceeding 470μF risks violating the 2.7A short-circuit limit during initial charge, potentially triggering FLG assertion.
Does the AP22818AKAWT-7 require external components for overcurrent protection?
No external components are required for overcurrent protection. The device uses an internal sense-FET architecture with 6ms deglitch on the FLG pin to reject transient inrush events. Only a 0.1μF ceramic and ≥10μF bulk capacitor on OUT, plus 1μF on IN, are mandatory for stable operation per the datasheet layout guidelines.
How does reverse-voltage protection behave when VOUT exceeds VIN by 50mV?
When VOUT rises >VIN +35mV (min), the internal comparator triggers within 2–15ms (tTRIG), turning off the MOSFET to block reverse current. Recovery occurs automatically once VOUT falls below VIN +35mV - no reset or enable toggle needed. This protects upstream 5V rails from backfeed in multi-port systems.
Can the FLG pin drive an LED directly for fault indication?
Yes - the FLG pin is an open-drain output rated for 10mA sink current with RFLG = 30–60Ω. A 4.7kΩ pull-up to 3.3V yields ~0.7mA LED current, sufficient for status indication. Do not exceed 10mA or apply voltage >5.5V to avoid damaging the internal FET.
AP22818AKAWT-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:
- 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-25
AP22818AKAWT-7 FAQ
1.How can I place an order for AP22818AKAWT-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP22818AKAWT-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 AP22818AKAWT-7 reliable?
The price and inventory of AP22818AKAWT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP22818AKAWT-7 is usually 5 days.
3.What payment methods are accepted for AP22818AKAWT-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP22818AKAWT-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP22818AKAWT-7?
AP22818AKAWT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP22818AKAWT-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 AP22818AKAWT-7?
For technical support, including AP22818AKAWT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP22818AKAWT-7 requirements.
6.How does Aetrix verify that AP22818AKAWT-7 is sourced from the original manufacturer or authorized distributors?
All AP22818AKAWT-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 AP22818AKAWT-7 meets industry standards.
7.What is the process for return or replacement of AP22818AKAWT-7?
All AP22818AKAWT-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP22818AKAWT-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 AP22818AKAWT-7 part is unused and in its original packaging.
Return procedure for AP22818AKAWT-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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