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Diodes Incorporated AP22818AKBWT-7
- Part No.:
- AP22818AKBWT-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AP22818AKBWT-7.pdf
- Description:
- USBPOWERSWITCHTSOT25T&R3K
- Quantity:
- Payment:
- Shipping:
Inventory:452
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Product details
Overview
AP22818AKBWT-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 auto-recovery overcurrent/overtemperature protection in a TSOT25 package.
For engineers reviewing the AP22818AKBWT-7 datasheet, AP22818AKBWT-7 pinout, AP22818AKBWT-7 application, or AP22818AKBWT-7 equivalent, this device supports precise power sequencing in ultrabooks, SSDs, and telecom systems with controlled rise time (2.1ms typ.), 6ms FLG deglitch, and 2.7V–5.5V input operation.
Technical Context
The AP22818AKBWT-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 reliable turn-on only after stable rail establishment.
It integrates a dedicated open-drain FLG output with 6ms blanking time to suppress false fault reporting during capacitive inrush, and a built-in discharge FET (RDIS = 170Ω typ.) that actively discharges the output when disabled - eliminating need for external bleed resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 2.0A max - supports high-capacitance loads like SSDs and USB peripherals without derating at +85°C ambient. |
| RDS(ON) | 75mΩ typ. @ 5V - minimizes conduction loss (≤750mW at 2A), 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 and auxiliary supplies. |
| Output Rise Time | 2.1ms typ. @ 3.3V - ensures controlled power-up sequencing to prevent bus contention or inrush-induced voltage droop. |
| FLG Blanking Time | 6ms typ. - suppresses transient overcurrent events (e.g., 120μF capacitor charging) without external filtering components. |
| Discharge Resistance | 170Ω typ. - fully discharges 100μF output capacitance to <0.5V in ≤0.4ms, preventing backfeed and latch-up. |
| Reverse-Voltage Trip | 70mV typ. - blocks reverse current when VOUT exceeds VIN by ≥70mV, protecting upstream sources during hot-plug removal. |
Pinout & Package
The AP22818AKBWT-7 is housed in a RoHS-compliant, lead-free TSOT25 (SOT-25) package with matte tin-plated leads (e3 finish), moisture sensitivity level 1, and thermal resistance RθJA = 123°C/W on standard FR-4 PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power ground reference | Low-impedance return path for internal control circuitry and discharge FET; must be connected to solid ground plane. |
| 2 EN | Active-high enable input | Logic-compatible (VIH ≥1.5V, VIL ≤0.5V); ties low during power-up to prevent unintended turn-on. |
| 3 OUT | Switched output node | Connects to load and ≥0.1μF ceramic + ≥10μF bulk capacitor; supports reverse-voltage protection and discharge path. |
| 4 IN | Input power supply | Accepts 2.7–5.5V; requires 1μF X7R/X5R ceramic bypass close to pin to suppress high-frequency noise and ringing. |
| 5 FLG | Open-drain fault flag | Active-low signal asserted after 6ms deglitch on overcurrent/overtemperature; pulls low via external pull-up to monitor system health. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated output discharge | Eliminates need for external bleed resistor - discharges 100μF load to <0.5V in 0.4ms upon disable. |
| Auto-recovery protection | Overcurrent, short-circuit, and overtemperature faults self-clear once condition resolves - no manual reset required. |
| Reverse-current blocking | Prevents backfeed from output to input when VOUT > VIN +70mV - critical for multi-rail hot-swap and battery backup systems. |
| UVLO with hysteresis | Enables switching only above 2.3V (rising) and disables below 2.12V (falling) - prevents erratic behavior during brownout or soft-start. |
| No external components needed | 6ms FLG deglitch, soft-start, and discharge are fully internal - reduces BOM count and layout area vs. discrete solutions. |
Applications
| Ultrabook Power Sequencing | SSD Power Management |
|---|---|
Use Scenario: Controlled power-up/down of USB-C peripheral ports and display interfaces in thin-and-light laptops. IC Role / Device Role / Timing Role: High-side load switch managing 5V VBUS delivery with 2.1ms rise time and reverse-current isolation during hot-plug. Use Value: Prevents bus contention and inrush-induced voltage droop across shared 5V rails while enabling independent port enable/disable. | Use Scenario: Isolating NAND flash and controller power domains in M.2 NVMe SSD modules during sleep/wake transitions. IC Role / Device Role / Timing Role: Load switch providing 2.0A peak current with fast discharge (≤0.4ms) to clear residual VOUT before re-enabling. Use Value: Eliminates data corruption risk from backfeed during partial power-down and ensures clean reset timing for PCIe link training. |
| Set-Top Box USB Hub | Telecom Line Card Hot-Swap |
Use Scenario: Power gating downstream USB peripherals (e.g., Wi-Fi dongles, storage drives) in consumer STBs with limited board space. IC Role / Device Role / Timing Role: Compact TSOT25 load switch delivering 2.0A with integrated FLG reporting to MCU for fault-aware USB port management. Use Value: Enables per-port overcurrent detection and auto-recovery without external sense resistors or op-amps - reducing component count by ≥4. | Use Scenario: Safe insertion/removal of line cards carrying 3.3V/5V I/O in carrier-grade telecom chassis with strict hot-swap compliance. IC Role / Device Role / Timing Role: High-reliability power switch with 6ms FLG deglitch and +150°C thermal shutdown - meeting IEC61000-4-2 surge immunity requirements. Use Value: Guarantees no false trips during card insertion transients and provides deterministic fault signaling to shelf manager via open-drain FLG. |
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 |
|---|---|---|---|
| TCK10AG30X | 1.0A rating, 90mΩ RDS(ON), no integrated discharge FET | Limited to lower-current USB peripherals; requires external discharge resistor for same functionality | Select if cost-sensitive and output capacitance <10μF; not suitable for SSD or high-COUT hot-swap. |
| TPS22919DBVR | 2.0A rating, 44mΩ RDS(ON), 1.2ms rise time, no reverse-voltage protection | Superior efficiency but lacks reverse-current blocking - unsuitable where VOUT may exceed VIN | Choose for minimal conduction loss in fixed-rail systems; avoid in battery-backed or multi-source architectures. |
Compared with TCK10AG30X and TPS22919DBVR, the AP22818AKBWT-7 uniquely combines 2.0A capacity, integrated discharge, reverse-voltage protection, and 6ms FLG blanking in a single TSOT25 package - making it optimal for space-constrained, multi-rail hot-swap designs requiring full fault autonomy.
Availability
AP22818AKBWT-7 is available at Aetrix Electronics and suitable for ultrabook power sequencing, SSD power management, and telecom line card hot-swap applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP22818AKBWT-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 protection applications.
The AP22818AKBWT-7 belongs to Diodes' AP228xx family of high-side load switches, designed specifically for USB-compliant hot-swap and power-distribution systems demanding robust fault handling and minimal external components.
FAQ
What is the function of the FLG pin on AP22818AKBWT-7?
The FLG pin is an open-drain fault flag that asserts low (after a 6ms deglitch timeout) when overcurrent, short-circuit, or overtemperature conditions occur. It remains low until both the fault and thermal condition are cleared. An external pull-up resistor is required to interface with MCU GPIOs for real-time system monitoring and diagnostics.
Does AP22818AKBWT-7 support reverse-voltage protection, and how does it work?
Yes - the device monitors VOUT – VIN and disables the internal MOSFET when the difference exceeds 70mV for 6ms. This prevents reverse current flow from output to input during hot-plug removal or backup source activation, protecting upstream regulators and avoiding latch-up in multi-rail systems.
Can AP22818AKBWT-7 drive a 100μF output capacitor without external components?
Yes - its integrated discharge FET (RDIS = 170Ω typ.) fully discharges a 100μF capacitor to <0.5V in ≤0.4ms when disabled. No external bleed resistor is needed, simplifying layout and eliminating leakage paths that compromise standby current in battery-powered devices.
What is the recommended input capacitor configuration for AP22818AKBWT-7 in USB applications?
Use a 1μF X7R/X5R ceramic capacitor placed directly between IN and GND, plus a ≥10μF MLCC or 100μF low-ESR electrolytic/tantalum capacitor near the input. This dual-stage filtering suppresses high-frequency noise and absorbs inrush energy, preventing VIN ringing that could damage the internal control circuitry.
AP22818AKBWT-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
- 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
AP22818AKBWT-7 FAQ
1.How can I place an order for AP22818AKBWT-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP22818AKBWT-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 AP22818AKBWT-7 reliable?
The price and inventory of AP22818AKBWT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP22818AKBWT-7 is usually 5 days.
3.What payment methods are accepted for AP22818AKBWT-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP22818AKBWT-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP22818AKBWT-7?
AP22818AKBWT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP22818AKBWT-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 AP22818AKBWT-7?
For technical support, including AP22818AKBWT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP22818AKBWT-7 requirements.
6.How does Aetrix verify that AP22818AKBWT-7 is sourced from the original manufacturer or authorized distributors?
All AP22818AKBWT-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 AP22818AKBWT-7 meets industry standards.
7.What is the process for return or replacement of AP22818AKBWT-7?
All AP22818AKBWT-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP22818AKBWT-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 AP22818AKBWT-7 part is unused and in its original packaging.
Return procedure for AP22818AKBWT-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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