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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Current Regulation/Management

Diodes Incorporated AP2331W-7

Name: AP2331W-7
Brand: Diodes Incorporated
SKU: AP2331W-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP2331W-7

Manufacturer:: Diodes Incorporated

Category:: Current Regulation/Management

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: AP2331W-7.pdf

Description:: IC CURRENT SWITCH SC59-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP2331W-7 from Diodes Incorporated is a single-channel, current-limited high-side load switch optimized for hot-swap applications in 5V-powered consumer and computing systems. It delivers 0.4A accurate current limiting, 250mΩ typical R_DS(ON), reverse-current blocking, and integrated protection including over-current, short-circuit, over-temperature, under-voltage lockout (UVLO), and output over-voltage (OVP) with 5.6V trip point. Used in USB-powered peripherals and display power rails where controlled inrush and fault resilience are critical.

For engineers reviewing the AP2331W-7 datasheet, AP2331W-7 pinout, AP2331W-7 application, or AP2331W-7 equivalent, this device is selected for its fast 0.7ms turn-on time, 0.7ms deglitch response to reverse current, and SC59 package compatibility with space-constrained 5V hot-plug interfaces requiring robust capacitive-load handling and bidirectional fault isolation.

Technical Context

The AP2331W-7 implements a monolithic N-channel MOSFET high-side switch with integrated current-sense FET and thermal shutdown circuitry. Its UVLO threshold is fixed at 2.65V (typ), and OVP triggers at 5.6V with 15µs debounce before shutdown.

Reverse-current protection activates at 0.25A (typ), clamping for 0.7ms before disabling the MOSFET; recovery occurs when V_OUT falls to 101% of V_IN. Thermal shutdown engages at 150°C with 20°C hysteresis, enabling pulsed fault cycling until load removal.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.7V–5.2V - Supports full USB 2.0/3.0 bus voltage range and 3.3V/5V system rails without external regulation.
Current Limit Accuracy	0.4A ±25% - Enables precise overload control for 200mA nominal loads (e.g., USB peripherals) while preventing fuse blowout.
R_DS(ON)	250mΩ max at 5V, 0.2A - Limits conduction loss to ≤10mW at rated load, reducing thermal stress in SC59 package.
Turn-On Time	0.7ms typ (CL = 0.1µF, R_LOAD = 20Ω) - Controls inrush dv/dt to <7V/ms, suppressing supply droop during hot-insertion.
OVP Trip Point	5.3V min / 5.6V typ - Protects downstream 5V logic from transient overvoltage events such as backfeed or regulator overshoot.
Reverse Current Limit	0.25A typ - Enforces USB-compliant reverse-current blocking without external diode, eliminating 0.3V forward drop.
UVLO Threshold	2.65V typ rising - Ensures switch remains off until host rail stabilizes above minimum USB enumeration voltage.

Pinout & Package

AP2331W-7 is housed in the SC59 package - a 3-pin, surface-mount variant of SOT-23 with enhanced thermal performance (θ_JA = 255°C/W) and identical footprint compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Power Ground Reference	Return path for internal current-sense FET and thermal sensor; must be connected to low-impedance system ground plane.
2 (OUT)	Switched Output Terminal	Drives capacitive load (e.g., LCD bias rail); features reverse-current clamp and OVP sensing node.
3 (IN)	Input Power Supply Pin	Accepts 2.7–5.2V input; supplies internal LDO and UVLO comparator; not internally clamped above 6.5V.

Key Features

Feature	Design Value
Built-in soft-start	0.7ms controlled rise time prevents input rail collapse during hot-swap into 100µF+ loads.
Reverse-current blocking	Active at all times; limits backfeed to ≤0.25A and shuts down within 0.7ms if sustained - meets USB BC1.2 compliance.
Output over-voltage protection	5.6V trip with 15µs debounce ensures immunity to nanosecond transients while reacting to sustained >5.3V faults.
Thermal shutdown with hysteresis	150°C activation + 20°C hysteresis enables safe fault cycling without latch-up or manual reset.
ESD robustness	3kV HBM / 300V MM rating allows direct PCB handling and integration into unshielded consumer enclosures.

Applications

USB Peripheral Power Switching

LCD Panel Bias Rail Control

Use Scenario: Hot-plugging USB hubs, docking stations, or e-readers into powered hosts where backfeed into upstream port must be prevented.

IC Role / Device Role / Timing Role: High-side load switch enforcing USB-compliant reverse-current blocking and inrush current limiting during plug-in.

Use Value: Eliminates need for external Schottky diode and RC timing network; reduces BOM count by 3 components while improving OVP response by 10× vs discrete solutions.

Use Scenario: Sequencing power to LCD backlight drivers or TCON ICs in monitors and TVs after main 5V rail stabilization.

IC Role / Device Role / Timing Role: Controlled 0.7ms turn-on switch ensuring clean ramp-up of 5V bias rails without disrupting video timing controllers.

Use Value: Prevents display flicker or initialization failure caused by uncontrolled capacitor charging; supports <10ms power-on reset windows.

Residential Gateway Port Protection

Laptop Docking Station Load Management

Use Scenario: Isolating Ethernet PHY, Wi-Fi module, or USB-C ports in gateways subject to ESD and cable-induced surges.

IC Role / Device Role / Timing Role: Fault-tolerant power switch providing simultaneous OVP, short-circuit, and thermal protection per port.

Use Value: Enables per-port reset without system reboot; maintains uptime during transient faults on one interface while others remain active.

Use Scenario: Managing power delivery to HDMI, SD card, or SATA peripherals in laptop docks with shared 5V bus.

IC Role / Device Role / Timing Role: Current-limited high-side switch preventing bus collapse when multiple peripherals draw inrush simultaneously.

Use Value: Guarantees stable 5V operation across 4+ downstream ports even with cumulative 800mA peak inrush - no brownout resets.

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	0.3A limit, 300mΩ R_DS(ON), no OVP, UVLO at 2.5V	Lacks output over-voltage protection and reverse-current clamping; suitable only for non-USB isolated loads.	Select when cost sensitivity outweighs OVP requirement and reverse-current risk is absent.
TPS22915BYFPR	0.5A limit, 85mΩ R_DS(ON), no reverse-current blocking, 1.2ms turn-on	Higher drive capability but no reverse-current protection; requires external diode for USB compliance.	Choose for low-loss 5V distribution where reverse feed is physically impossible and thermal margin is critical.

Compared with TCK10AG30X and TPS22915BYFPR, the AP2331W-7 uniquely integrates OVP, reverse-current blocking, and sub-millisecond deglitch timing in a single SC59 package - making it the only option for USB-compliant hot-swap with full fault coverage in space-constrained designs.

Availability

AP2331W-7 is available at Aetrix Electronics and suitable for LCD TV power sequencing, USB peripheral hot-swap, and residential gateway port protection requiring stable component supply and long-term industrial lifecycle support.

Supply support for AP2331W-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 and signal integrity solutions for consumer, computing, and industrial markets.

The AP2331 series belongs to Diodes' load switch product line, engineered specifically for robust hot-swap operation in USB, display, and networking equipment where fault resilience and compact packaging are mandatory.

FAQ

What is the maximum continuous output current supported by AP2331W-7?

The AP2331W-7 provides a guaranteed current limit of 0.4A (typical) with ±25% tolerance across temperature and voltage. Its absolute maximum continuous load current is internally limited to 0.2A per Recommended Operating Conditions, ensuring safe operation within SC59 thermal limits up to +85°C ambient.

Does AP2331W-7 require an external pull-up or pull-down resistor on any pin?

No external resistors are required. The IN pin is the sole control input and accepts direct connection to a 2.7–5.2V supply; GND and OUT are passive terminals. There is no enable pin, so the device operates autonomously based on input voltage and fault conditions.

How does the AP2331W-7 handle reverse current during hot-unplug scenarios?

When V_OUT exceeds V_IN by ≥0.2V, reverse current flows until it reaches 0.25A (typ). The device then clamps current for 0.7ms before fully disabling the MOSFET. Recovery occurs automatically when V_OUT drops to 101% of V_IN, enabling seamless reconnection without manual reset.

Can AP2331W-7 be used with a 3.3V input supply?

Yes - the AP2331W-7 operates across 2.7V–5.2V, including 3.3V nominal rails. At 3.3V, R_DS(ON) increases to ~320mΩ (max), and turn-on time extends to ~0.9ms, but all protections (UVLO, OVP, thermal) remain fully functional and specified.

AP2331W-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Current Switch

Sensing Method:: High-Side

Accuracy:: -

Voltage - Input:: 2.7V ~ 5.2V

Current - Output:: 200mA

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-59-3

AP2331W-7 FAQ

1.How can I place an order for AP2331W-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP2331W-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 AP2331W-7 reliable?

The price and inventory of AP2331W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2331W-7 is usually 5 days.

3.What payment methods are accepted for AP2331W-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2331W-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP2331W-7?

AP2331W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP2331W-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 AP2331W-7?

For technical support, including AP2331W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2331W-7 requirements.

6.How does Aetrix verify that AP2331W-7 is sourced from the original manufacturer or authorized distributors?

All AP2331W-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 AP2331W-7 meets industry standards.

7.What is the process for return or replacement of AP2331W-7?

All AP2331W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2331W-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 AP2331W-7 part is unused and in its original packaging.

Return procedure for AP2331W-7:

1.Submit a request within 90 days.

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

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