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Diodes Incorporated AP2331SA-7
- Part No.:
- AP2331SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP2331SA-7.pdf
- Description:
- IC CURRENT SWITCH SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,950
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Product details
Overview
AP2331SA-7 from Diodes Incorporated is a single-channel, current-limited high-side load switch optimized for hot-swap applications in power-distribution systems. It delivers 0.2A continuous output, features 250mΩ RDS(ON), reverse-current blocking, and integrated protections including over-current (0.4A limit), over-temperature (150°C shutdown), short-circuit, under-voltage lockout (2.65V typ), and output over-voltage (5.6V trip). It operates across 2.7V–5.2V input and supports fast 0.7ms turn-on in SOT23 packaging.
For engineers reviewing the AP2331SA-7 datasheet, AP2331SA-7 pinout, AP2331SA-7 application, or AP2331SA-7 equivalent, this device is selected for robust power sequencing in USB-powered peripherals, display subsystems, and embedded computing where controlled inrush, fault containment, and reverse-current prevention are critical design requirements.
Technical Context
The AP2331SA-7 integrates a precision current-sense FET and deglitch logic to enforce a stable 0.4A overload threshold with ±0.1A tolerance across –40°C to +85°C ambient. Its UVLO circuit activates at 2.65V (rising) and releases at 2.35V (falling), enabling clean hot-plug insertion without rail collapse.
Reverse-current protection triggers at 0.25A (IROCP), clamping flow for 0.7ms before MOSFET shutdown; recovery occurs only when VOUT ≤ 101% × VIN. Output over-voltage protection responds within 15µs at 5.6V, while thermal shutdown includes 20°C hysteresis to prevent oscillation during sustained faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V–5.2V: Supports standard USB 3.0/5V and low-voltage logic rails without external regulation. |
| Continuous Output Current | 0.2A: Rated maximum steady-state load for thermal safety in SOT23 package at +85°C ambient. |
| RDS(ON) | 250mΩ (typ): Limits conduction loss to ≤25mW at 0.2A, enabling compact thermal design. |
| Current Limit Threshold | 0.4A (typ): Clamps fault current to protect downstream components and upstream supply during shorts. |
| Turn-On Time | 0.7ms (typ): Controlled soft-start prevents >0.1A inrush into 100µF capacitive loads. |
| UVLO Threshold | 2.65V (rising): Ensures switch remains off until input stabilizes above minimum system operating voltage. |
| Thermal Shutdown | 150°C (Junction): Triggers automatic shutdown before silicon damage; 20°C hysteresis enables safe auto-recovery. |
Pinout & Package
AP2331SA-7 is housed in a 3-pin SOT23 package (JEDEC TO-236AB), with exposed pad not electrically connected. Pin 1 = GND, Pin 2 = OUT, Pin 3 = IN - compatible with standard pick-and-place and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power Ground Reference | Provides return path for internal bias, current sense, and protection circuits; must connect to low-impedance system ground plane. |
| OUT (Pin 2) | Switched Output Terminal | Delivers regulated power to load; incorporates reverse-current blocking and OVP sensing node. |
| IN (Pin 3) | Input Supply Terminal | Accepts 2.7V–5.2V source; supplies internal LDO, UVLO comparator, and gate driver. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-current blocking | Active at all times; limits backfeed to ≤0.25A and shuts down within 0.7ms if sustained, meeting USB specification compliance. |
| Built-in soft-start | 0.7ms typical rise time with 0.1µF output capacitor, eliminating need for external RC timing network. |
| Multi-fault protection | Simultaneous detection of over-current, short-circuit, over-voltage (5.6V), over-temperature (150°C), and UVLO - no external supervision IC required. |
| Low quiescent current | 125µA (typ) above UVLO: Minimizes standby power loss in always-on subsystems like USB-C dock management. |
| Green RoHS compliance | Halogen-free, antimony-free, lead-free per EU Directive 2011/65/EU; UL Recognized (E322375) and IEC60950-1 CB certified. |
Applications
| USB Peripheral Power Switching | LCD Panel Backlight Control |
|---|---|
Use Scenario: Hot-plugging USB hubs, docking stations, or external SSDs where uncontrolled inrush could disrupt host port voltage. IC Role / Device Role / Timing Role: High-side load switch enforcing current-limited, soft-started power delivery with reverse-current blocking. Use Value: Prevents host VBUS droop and enumeration failure by limiting peak inrush to <0.1A and blocking backfeed during cable disconnect. |
Use Scenario: Enabling/disabling LED backlight drivers in LCD TVs or monitors during sleep/wake transitions. IC Role / Device Role / Timing Role: Precision-controlled power gate with fast 0.7ms turn-on and UVLO hold-off to synchronize with display controller timing. Use Value: Eliminates visible flash or flicker during backlight activation by ensuring monotonic VOUT ramp and zero reverse current into boost converter. |
| Embedded System Rail Sequencing | Industrial I/O Module Protection |
Use Scenario: Powering FPGA configuration banks or sensor interface rails in industrial gateways requiring staggered startup. IC Role / Device Role / Timing Role: Independent, protected power switch with programmable enable timing via upstream GPIO control. Use Value: Enables deterministic power-up sequence without cross-rail contention; built-in OCP prevents latch-up during FPGA configuration surge. |
Use Scenario: Protecting RS-485 transceiver or CAN bus termination resistors from field-induced surges or miswiring. IC Role / Device Role / Timing Role: Fault-isolating high-side switch with 15µs OVP response and thermal shutdown to survive transient overvoltage events. Use Value: Absorbs 5.6V+ transients on powered I/O lines without damaging downstream PHYs or requiring external TVS diodes. |
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 |
|---|---|---|---|
| AP22651WS-7 | Higher 1.5A current limit, 85mΩ RDS(ON), but no reverse-current protection or OVP. | Suitable for higher-power loads without reverse-path constraints (e.g., motor drivers), but requires external OVP/ROCP circuitry. | Select when >0.4A continuous current is needed and reverse-current blocking is handled elsewhere in the BOM. |
| TCK107AG,LF | 0.5A limit, 120mΩ RDS(ON), includes reverse-current blocking and thermal shutdown, but lacks OVP and UVLO. | Fits general-purpose hot-swap where output overvoltage risk is mitigated externally (e.g., regulated DC-DC outputs). | Choose when lower RDS(ON) and higher current headroom are prioritized over integrated OVP/UVLO coverage. |
Compared with AP2331SA-7, AP22651WS-7 trades full protection integration for higher current capability, while TCK107AG,LF offers lower conduction loss but omits two key protections-making AP2331SA-7 the most balanced choice for USB-compliant, fault-resilient 5V rail switching.
Availability
AP2331SA-7 is available at Aetrix Electronics and suitable for LCD monitor power sequencing, USB-C docking station subsystems, and embedded gateway rail management requiring stable component supply, long-term lifecycle support, and full RoHS/Green compliance.
Supply support for AP2331SA-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 power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.
The AP2331 belongs to Diodes' load switch portfolio designed specifically for robust, integrated power gating in space-constrained, high-reliability applications such as portable electronics and smart peripherals.
FAQ
What is the maximum capacitive load the AP2331SA-7 can safely drive?
The AP2331SA-7 is characterized for 0.1µF output capacitance in its typical application circuit, with 0.7ms turn-on time measured into a 20Ω load. For larger capacitors, inrush current remains limited to 0.4A, but turn-on time increases linearly with CLOAD; designs exceeding 10µF should verify thermal rise using PD = I2 × RDS(ON) and θJA = 215°C/W for SOT23.
Does the AP2331SA-7 require an external pull-up or pull-down resistor on the IN pin?
No external biasing is required on the IN pin: it is a passive input terminal accepting 2.7V–5.2V supply directly. The device draws only 125µA quiescent current above UVLO, so no pull-up/down is needed for enable control - the switch is active whenever valid input voltage is present and UVLO is satisfied.
How does reverse-current protection behave during hot-unplug of a powered peripheral?
During hot-unplug, if VOUT > VIN (e.g., due to stored charge in downstream caps), the AP2331SA-7 immediately limits reverse current to ≤0.25A. If that condition persists beyond 0.7ms, the MOSFET turns off completely; recovery occurs only after VOUT drops to ≤101% × VIN, preventing backfeed into the host port per USB specification.
Can the AP2331SA-7 be used with a 3.3V-only system without 5V support?
Yes - the AP2331SA-7 operates fully across 2.7V–5.2V, including nominal 3.3V rails. At 3.3V input, RDS(ON) rises to ~280mΩ (per Fig. 4), maintaining <0.2A continuous rating; UVLO releases at 2.35V, ensuring reliable operation even with 10% rail sag common in battery-backed 3.3V domains.
AP2331SA-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:
- SOT-23-3
AP2331SA-7 FAQ
1.How can I place an order for AP2331SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2331SA-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 AP2331SA-7 reliable?
The price and inventory of AP2331SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2331SA-7 is usually 5 days.
3.What payment methods are accepted for AP2331SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2331SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2331SA-7?
AP2331SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2331SA-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 AP2331SA-7?
For technical support, including AP2331SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2331SA-7 requirements.
6.How does Aetrix verify that AP2331SA-7 is sourced from the original manufacturer or authorized distributors?
All AP2331SA-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 AP2331SA-7 meets industry standards.
7.What is the process for return or replacement of AP2331SA-7?
All AP2331SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2331SA-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 AP2331SA-7 part is unused and in its original packaging.
Return procedure for AP2331SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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