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Diodes Incorporated AP22818BKEWT-7
- Part No.:
- AP22818BKEWT-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AP22818BKEWT-7.pdf
- Description:
- USBPOWERSWITCHTSOT25T&R3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,088
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Product details
Overview
AP22818BKEWT-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), active-low enable (EN), integrated output discharge, reverse-voltage protection (70mV trip), and 6ms deglitched fault flag (FLG). It operates from 2.7V to 5.5V input and delivers controlled power sequencing in ultrabooks and SSDs.
For engineers reviewing the AP22818BKEWT-7 datasheet, AP22818BKEWT-7 pinout, AP22818BKEWT-7 application, or AP22818BKEWT-7 equivalent, key selection criteria include its 2.0A current limit, TSOT25 package thermal resistance (123°C/W), active-low logic compatibility, reverse-current blocking capability, and integrated UVLO (2.3V typ.) with 180mV hysteresis.
Technical Context
The AP22818BKEWT-7 implements an N-channel MOSFET high-side switch with bi-directional current sensing and thermal shutdown at +150°C (40°C hysteresis). Its internal discharge FET provides 140–200Ω resistive path to GND when disabled, ensuring rapid VOUT decay (<0.4ms for 1μF).
Protection architecture includes independent overcurrent limiting (2.7A typ. at 4.5V), short-circuit current clamping (~0.5A), reverse-voltage comparator (70mV trip), and undervoltage lockout (2.3V rising threshold) - all with auto-recovery behavior and no external components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports full USB 2.0/3.0 bus voltage range and common 3.3V/5V system rails. |
| RDS(ON) | 75mΩ (typ.) at 5V - enables <150mW conduction loss at 2.0A, reducing thermal stress in TSOT25 package. |
| Output Current Limit | 2.7A (typ.) at VOUT = 4.5V - sustains safe operation under sustained overload without latch-off. |
| Enable Polarity | Active-low (EN) - compatible with standard GPIOs asserting low to activate power delivery. |
| FLG Blanking Time | 6ms (typ.) - suppresses false fault reporting during capacitive inrush transients in hot-plug scenarios. |
| Reverse-Voltage Trip | 70mV (typ.) - blocks reverse current before VOUT exceeds VIN by >70mV, protecting upstream sources. |
| UVLO Threshold | 2.3V (typ.) rising - prevents erratic switching during brown-out conditions and ensures clean power-up. |
Pinout & Package
AP22818BKEWT-7 is housed in a RoHS-compliant, lead-free TSOT25 (SOT-25-5) package with matte tin-plated leads solderable per MIL-STD-202, Method 208 (e3). Thermal resistance is 123°C/W (Junction-to-Ambient) on standard FR-4 PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Primary return path for internal control circuitry and discharge FET; must be low-impedance connection to system ground plane. |
| 2 (FLG) | Fault indicator output | Open-drain active-low signal asserting after 6ms deglitch upon overcurrent or overtemperature event. |
| 3 (OUT) | Switched output | Drives downstream load; requires 0.1μF ceramic + ≥10μF bulk capacitor to GND for stability and short-circuit immunity. |
| 4 (IN) | Power input | Accepts 2.7–5.5V supply; requires 1μF X7R/X5R ceramic bypass capacitor placed adjacent to pin. |
| 5 (EN) | Enable control | Active-low logic input - pulled low to enable switch; must not float; 0.5V max logic low threshold ensures noise margin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated output discharge | 140–200Ω discharge path reduces VOUT to <0.5V in ≤0.4ms (1μF load), eliminating residual voltage hazards during hot removal. |
| Reverse-voltage protection | 70mV comparator trip disables switch within 5ms of VOUT > VIN +70mV, preventing backfeed into upstream supplies. |
| Soft-start rise time | 2.1ms (typ.) at 3.3V - limits inrush dI/dt to <1A/ms, avoiding input rail collapse during power-up. |
| Thermal shutdown recovery | +150°C trip with +40°C hysteresis - enables automatic cycling during sustained overload, maintaining system availability without manual reset. |
| UVLO hysteresis | 180mV - ensures stable enable/disable transition across input voltage droop, critical for robust hot-swap operation. |
Applications
| Ultrabook Power Sequencing | USB Peripheral Hot-Swap |
|---|---|
Use Scenario: Controlled power-up/down of PCIe SSDs and display interfaces in thin-client notebooks with tight thermal budgets. IC Role / Device Role / Timing Role: High-side load switch enabling precise timing-controlled rail activation and fast discharge between sleep/wake cycles. Use Value: Eliminates need for discrete MOSFET + gate driver + discharge resistor, reducing BOM count by 4 components while meeting USB-IF hot-plug compliance. | Use Scenario: Safe insertion/removal of USB-C peripherals (docks, hubs) without disrupting host system power integrity. IC Role / Device Role / Timing Role: Fault-protected power gate with 6ms FLG blanking to ignore transient inrush and report only sustained faults. Use Value: Prevents false disconnect events during plug-in; reverse-voltage blocking avoids damaging host port controllers during miswired connections. |
| Solid-State Drive (SSD) Power Control | Set-Top Box Rail Management |
Use Scenario: Isolating 3.3V VCC power to NAND flash controller and DRAM buffer during firmware updates or thermal throttling. IC Role / Device Role / Timing Role: Current-limited distribution switch providing 2.0A peak delivery with overtemperature auto-recovery to sustain operation under thermal stress. Use Value: Enables graceful degradation instead of hard shutdown - maintains partial functionality during extended write operations with elevated junction temperature. | Use Scenario: Managing auxiliary 5V rail powering HDMI PHY, IR receiver, and Ethernet PHY in consumer STBs with variable load profiles. IC Role / Device Role / Timing Role: Single-chip solution delivering controlled turn-on, reverse-current blocking, and fault reporting via open-drain FLG to MCU. Use Value: Reduces standby current leakage to <1µA (shutdown mode) and eliminates external reverse-blocking diode, improving efficiency by ~3% at 1.5A load. |
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 |
|---|---|---|---|
| TPS22916BLYFPR | 1.5A rated, 85mΩ RDS(ON), active-high EN, no reverse-voltage protection | Lacks reverse-voltage blocking and has lower current rating - unsuitable for USB-C backfeed-sensitive designs | Select only if active-high logic is mandatory and reverse-current risk is mitigated externally. |
| RT9711CGQW | 2.0A rated, 70mΩ RDS(ON), active-low EN, but no integrated discharge FET or FLG deglitch | Requires external RC network for discharge and lacks fault blanking - increases design complexity and susceptibility to false trips | Prefer only when cost sensitivity outweighs reliability requirements and board space permits external components. |
Compared with TPS22916BLYFPR and RT9711CGQW, AP22818BKEWT-7 uniquely combines 2.0A capacity, active-low EN, reverse-voltage protection, integrated discharge, and 6ms FLG blanking in a single TSOT25 package - delivering higher functional integration and USB-compliant robustness without external components.
Availability
AP22818BKEWT-7 is available at Aetrix Electronics and suitable for ultrabook power sequencing, USB peripheral hot-swap, and SSD power control requiring stable component supply, long-term lifecycle support, and automotive-grade traceability options.
Supply support for AP22818BKEWT-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 high-reliability power management, signal integrity, and protection solutions for computing, industrial, and consumer markets.
The AP22816/17/18 family targets USB-compliant hot-swap and power-distribution applications, emphasizing integration of protection features (reverse-voltage, thermal, overcurrent), low-RDS(ON), and compact packaging for space-constrained portable electronics.
FAQ
What is the maximum continuous output current supported by AP22818BKEWT-7?
The AP22818BKEWT-7 supports up to 2.0A continuous output current under recommended operating conditions (2.7V–5.5V input, TA ≤ +85°C, proper PCB thermal layout). Its overcurrent limit is 2.7A (typ.) at VOUT = 4.5V, with auto-recovery behavior that maintains regulation rather than latching off. Sustained 2.0A operation requires adherence to thermal guidelines - including use of minimum 2oz copper and thermal vias - due to its 123°C/W RθJA.
Does AP22818BKEWT-7 require external components for basic operation?
No external components are required for core functionality: the device integrates soft-start, discharge FET, fault blanking, and protection circuits. However, mandatory external capacitors include a 1μF ceramic bypass on IN–GND and a 0.1μF ceramic + ≥10μF bulk capacitor on OUT–GND. These ensure stable operation, suppress ringing during short-circuit events, and meet USB hot-plug specifications. No pull-up/pull-down resistors are needed on EN or FLG.
How does the reverse-voltage protection function in AP22818BKEWT-7?
The AP22818BKEWT-7 monitors the voltage difference between OUT and IN. When VOUT exceeds VIN by 70mV (typ.), the internal comparator triggers within 5ms to disable the main power MOSFET, blocking reverse current flow. This protects upstream supplies from backfeed damage during cable misinsertion or system-level fault conditions. Recovery occurs automatically once VOUT − VIN falls below the hysteresis threshold (~35mV), restoring normal forward conduction without user intervention.
Can AP22818BKEWT-7 be used in automotive applications?
The AP22818BKEWT-7 is not AEC-Q100 qualified and is intended for commercial/industrial applications. Diodes Incorporated offers automotive-grade variants (e.g., AP22818W5-7) with AEC-Q100 Grade 1 qualification, PPAP capability, and IATF 16949 manufacturing. For automotive use, contact Diodes' automotive sales team to obtain qualified part numbers, test reports, and change-control documentation - standard AP22818BKEWT-7 lacks automotive-specific reliability validation and temperature range extension beyond −40°C to +85°C.
AP22818BKEWT-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
AP22818BKEWT-7 FAQ
1.How can I place an order for AP22818BKEWT-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP22818BKEWT-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 AP22818BKEWT-7 reliable?
The price and inventory of AP22818BKEWT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP22818BKEWT-7 is usually 5 days.
3.What payment methods are accepted for AP22818BKEWT-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP22818BKEWT-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP22818BKEWT-7?
AP22818BKEWT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP22818BKEWT-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 AP22818BKEWT-7?
For technical support, including AP22818BKEWT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP22818BKEWT-7 requirements.
6.How does Aetrix verify that AP22818BKEWT-7 is sourced from the original manufacturer or authorized distributors?
All AP22818BKEWT-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 AP22818BKEWT-7 meets industry standards.
7.What is the process for return or replacement of AP22818BKEWT-7?
All AP22818BKEWT-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP22818BKEWT-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 AP22818BKEWT-7 part is unused and in its original packaging.
Return procedure for AP22818BKEWT-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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