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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Distribution Switches, Load Drivers

Diodes Incorporated AP22818AKEWT-7

Name: AP22818AKEWT-7
Brand: Diodes Incorporated
SKU: AP22818AKEWT-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP22818AKEWT-7

Manufacturer:: Diodes Incorporated

Category:: Power Distribution Switches, Load Drivers

Package:: SOT-23-5 Thin, TSOT-23-5

Datasheet:: AP22818AKEWT-7.pdf

Description:: USB POWER SWITCH TSOT25 T&R 3K

Quantity:: RFQ Add To RFQ list

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Inventory:2,400

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Product details

Overview

AP22818AKEWT-7 from Diodes Incorporated is a 2.0A single-channel high-side load switch optimized for USB and hot-swap applications, featuring 75mΩ R_DS(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 overcurrent, overtemperature, short-circuit, and UVLO protection.

For engineers reviewing the AP22818AKEWT-7 datasheet, AP22818AKEWT-7 pinout, AP22818AKEWT-7 application, or AP22818AKEWT-7 equivalent, key selection criteria include current rating (2.0A), enable polarity (active-low), thermal shutdown threshold (+150°C), FLG deglitch timing (6ms typ.), and TSOT25 footprint compatibility with space-constrained portable designs.

Technical Context

The AP22818AKEWT-7 implements an N-channel MOSFET high-side switch with bi-directional current sensing and thermal foldback. Its internal current-limit circuit triggers at 2.2–3.2A (typ. 2.7A) under overload, clamping output current while reducing V_OUT to maintain safe power dissipation.

It integrates a dedicated discharge FET activated on disable, providing 140–200Ω resistive path to discharge output capacitors below 0.5V in ≤0.4ms. The open-drain FLG pin asserts low after 2–15ms blanking window upon overcurrent or overtemperature fault detection, eliminating false trips from 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 external current limiting.
R_DS(ON)	75mΩ max at 5V/25°C - 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 VBUS.
Enable Polarity	Active-low (KE variant) - interfaces directly with standard GPIOs without level-shifting.
FLG Blanking Time	6ms typical - suppresses false fault reporting during capacitor inrush in hot-plug scenarios.
UVLO Threshold	2.3V rising / 2.12V falling - prevents erratic switching during brown-out or power-up sequencing.
Thermal Shutdown	+150°C with +40°C hysteresis - enables automatic recovery after fault removal without manual reset.

Pinout & Package

AP22818AKEWT-7 uses the TSOT25 (SOT-25) 5-pin thermally enhanced package: 2.9mm × 1.6mm × 0.95mm, matte tin-plated leads, moisture sensitivity level 1 per J-STD-020.

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; high-impedance when floating; requires pull-down if unused.
3 OUT	Switched Output Terminal	Connects to load and ≥10μF bulk capacitor; bypassed with 0.1μF ceramic for transient immunity.
4 IN	Input Power Supply	Accepts 2.7–5.5V; requires 1μF X7R/X5R ceramic bypass close to pin.
5 FLG	Open-Drain Fault Flag	Asserts low during overcurrent/overtemperature; requires external pull-up resistor (e.g., 10kΩ).

Key Features

Feature	Design Value
Integrated Output Discharge	140–200Ω discharge path ensures V_OUT drops below 0.5V in ≤0.4ms on disable - eliminates residual voltage that could disrupt downstream logic.
Reverse-Voltage Protection	Triggers MOSFET turn-off when V_OUT exceeds V_IN by 35–105mV - prevents backfeed damage in multi-rail systems or shared-bus configurations.
Soft-Start Rise Time	1.0–3.5ms (typ. 2.1ms) with 4.7μF load - limits inrush dI/dt to avoid input rail collapse and EMI spikes.
Overcurrent Auto-Recovery	Current-limited mode sustains 2.7A (typ.) until fault clears - avoids latch-up and enables autonomous system resilience without host intervention.
ESD Robustness	2kV HBM / 500V CDM - meets industrial handling requirements without additional protection components.

Applications

Ultrabook Power Sequencing

USB 3.0 Port Switching

Use Scenario: Controlled power-up/down of PCIe SSDs and display interface modules during sleep/wake transitions in thin-and-light notebooks.

IC Role / Device Role / Timing Role: High-side load switch enabling precise timing of 3.3V/5V rail activation with <2.1ms rise time and 20μs turn-off delay.

Use Value: Prevents bus contention and inrush-induced voltage droop on shared VBUS lines, ensuring reliable enumeration of USB peripherals.

Use Scenario: Hot-swap isolation of USB 3.0 Type-A ports in docking stations subject to repeated plug/unplug cycles.

IC Role / Device Role / Timing Role: Active-high/low configurable switch with 6ms FLG deglitch and reverse-current blocking to meet USB Battery Charging v1.2 compliance.

Use Value: Eliminates need for external TVS and current-sense resistors while maintaining ±15kV IEC61000-4-2 surge immunity on output.

Solid-State Drive (SSD) Power Control

Set-Top Box Rail Management

Use Scenario: Independent power gating of NAND flash controller and DRAM buffers in M.2 NVMe SSDs to reduce standby leakage.

IC Role / Device Role / Timing Role: 2.0A-rated switch with 75mΩ R_DS(ON) and thermal foldback, enabling full-speed operation without derating at 85°C ambient.

Use Value: Reduces conduction loss by >30% versus 100mΩ alternatives, lowering junction temperature rise and extending SSD lifetime.

Use Scenario: Selective powering of HDMI receiver ICs and audio DACs in consumer STBs during channel-change transitions.

IC Role / Device Role / Timing Role: Load switch with UVLO (2.3V) and undervoltage lockout hysteresis (180mV) to prevent glitchy resets during AC line sags.

Use Value: Ensures clean power cycling without firmware intervention, meeting CE/UL Class B EMC requirements for broadcast equipment.

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 rating, 85mΩ R_DS(ON), active-high enable only, no reverse-voltage protection	Lacks reverse-current blocking and thermal hysteresis; requires external discharge circuit for same functionality	Choose when lower cost and simpler enable interface outweigh need for 2.0A capacity and integrated protection.
RT9711CGQW	2.0A rating, 70mΩ R_DS(ON), active-high enable, no FLG deglitch or reverse-voltage comparator	Missing 6ms fault blanking and V_OUT>V_IN detection - unsuitable for hot-plug USB or shared-bus systems	Prefer only in fixed-rail, non-hot-swap applications where fault reporting timing and backfeed prevention are not required.

Compared with TPS22916BLYFPR and RT9711CGQW, AP22818AKEWT-7 uniquely combines 2.0A capability, active-low enable, reverse-voltage protection, and 6ms FLG deglitch in a 5-pin TSOT25 - making it optimal for space-constrained, hot-swap USB and SSD power control where autonomous fault management is critical.

Availability

AP22818AKEWT-7 is available at Aetrix Electronics and suitable for ultrabook power sequencing, USB 3.0 port switching, and SSD power control requiring stable component supply across production lifecycles.

Supply support for AP22818AKEWT-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 devices for power management, signal integrity, and connectivity applications.

The AP22816/17/18 family targets USB-compliant hot-swap and high-capacitance load switching, emphasizing robust fault handling, minimal external components, and compact packaging for portable and embedded systems.

FAQ

What is the maximum continuous output current for AP22818AKEWT-7?

The AP22818AKEWT-7 is rated for 2.0A continuous output current under recommended operating conditions (T_A ≤ +85°C, V_IN = 5V). Its overcurrent limit is specified at 2.2–3.2A (typ. 2.7A), and thermal shutdown activates at +150°C junction temperature. Derating is required above +85°C ambient per R_θJA = 123°C/W.

Does AP22818AKEWT-7 support reverse-current blocking?

Yes - AP22818AKEWT-7 provides active reverse-current blocking via its integrated reverse-voltage comparator. When V_OUT exceeds V_IN by 35–105mV for ≥2ms, the internal MOSFET turns off to prevent backfeed. This feature is enabled by default and requires no external components or configuration.

How does the FLG pin behave during overcurrent events?

The FLG pin is an open-drain output that pulls low after a 2–15ms (typ. 6ms) deglitch timeout when overcurrent or overtemperature is detected. It remains low until both faults are cleared. A minimum 10kΩ external pull-up resistor to V_IN is required for proper logic-level signaling to host controllers.

Can AP22818AKEWT-7 be used with 3.3V-only systems?

Yes - AP22818AKEWT-7 operates across 2.7V–5.5V input, fully supporting 3.3V rails. Its enable threshold (V_IL ≤ 0.5V, V_IH ≥ 1.5V) is compatible with 3.3V GPIOs, and its 75mΩ R_DS(ON) ensures <0.25V drop at 3.3A, well within 3.3V system margins even at elevated temperatures.

AP22818AKEWT-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

AP22818AKEWT-7 FAQ

1.How can I place an order for AP22818AKEWT-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP22818AKEWT-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 AP22818AKEWT-7 reliable?

The price and inventory of AP22818AKEWT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP22818AKEWT-7 is usually 5 days.

3.What payment methods are accepted for AP22818AKEWT-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP22818AKEWT-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP22818AKEWT-7?

AP22818AKEWT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP22818AKEWT-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 AP22818AKEWT-7?

For technical support, including AP22818AKEWT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP22818AKEWT-7 requirements.

6.How does Aetrix verify that AP22818AKEWT-7 is sourced from the original manufacturer or authorized distributors?

All AP22818AKEWT-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 AP22818AKEWT-7 meets industry standards.

7.What is the process for return or replacement of AP22818AKEWT-7?

All AP22818AKEWT-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP22818AKEWT-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 AP22818AKEWT-7 part is unused and in its original packaging.

Return procedure for AP22818AKEWT-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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