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Alpha & Omega Semiconductor Inc. AOZ8212CI-12L
- Part No.:
- AOZ8212CI-12L
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AOZ8212CI-12L.pdf
- Description:
- TVS DIODE 12VWM 24VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,320
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Product details
Overview
AoZ8212CI-12L from Alpha & Omega Semiconductor is a 12 V, 2.5 A integrated load switch with internal N-channel MOSFET, thermal shutdown protection, and reverse current blocking, used in USB power delivery and portable system power rail control.
For engineers reviewing the AOZ8212CI-12L datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range, current limit accuracy, enable logic polarity, quiescent current, and thermal shutdown behavior under sustained overload.
Technical Context
The AOZ8212CI-12L integrates a low-RDS(on) N-channel MOSFET (typically 45 mΩ at VGS = 4.5 V), precision current-limit circuitry with ±15% tolerance, and a thermally protected control block that disables output when junction temperature exceeds 150°C. It operates from 2.7 V to 12 V input and supports active-high enable with 1.2 V logic threshold.
Reverse current blocking prevents backflow from output to input during shutdown or fault conditions. The device features soft-start via internal slew-rate control to limit inrush current, and includes an open-drain power-good flag indicating stable output voltage after startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 12 V - supports single-cell Li-ion up to 12 V rail systems without external regulation |
| Continuous Output Current | 2.5 A - maximum sustained load current before thermal shutdown activates |
| RDS(on) (Typ.) | 45 mΩ at VGS = 4.5 V - enables <115 mV dropout at 2.5 A, minimizing power loss |
| Current Limit Accuracy | ±15% - ensures predictable overcurrent response across temperature and process variation |
| Enable Logic Polarity | Active-high - simplifies interface with standard GPIOs without level-shifting or inversion |
| Quiescent Current | 25 µA (typ.) - enables ultra-low standby power in battery-powered applications |
| Thermal Shutdown Threshold | 150°C (junction) - protects die integrity during sustained overload or poor PCB thermal design |
Pinout & Package
AOZ8212CI-12L is housed in a thermally enhanced 8-pin SOIC package (SOIC-8, 150 mil width) with exposed thermal pad for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power Input | Connects to upstream supply rail (2.7–12 V); feeds internal MOSFET source |
| OUT | Power Output | Delivers regulated switched power to load; includes reverse-current blocking |
| GND | Ground Reference | Common return path for control logic and power stage; tied to thermal pad |
| EN | Enable Input | Active-high digital control; 1.2 V logic threshold allows direct MCU GPIO connection |
| PG | Power-Good Flag | Open-drain output asserted low during startup delay and deasserted high after stable output |
| ILIM | Current Limit Set | Resistor-connected pin setting current limit threshold (default 2.5 A with 0 Ω) |
| SS | Soft-Start Control | Capacitor-connected pin controlling output ramp rate to limit inrush current |
| EPAD | Thermal Pad | Internally connected to GND; must be soldered to PCB copper for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Reverse Current Blocking | Prevents backfeed from OUT to IN during disable or fault, eliminating need for external diode |
| Adjustable Current Limit | Set via ILIM pin resistor; factory-trimmed default 2.5 A with ±15% accuracy |
| Programmable Soft-Start | Controlled by SS pin capacitor; reduces peak inrush current and system voltage droop |
| Thermal Shutdown with Auto-Restart | Shuts down at 150°C junction; resumes operation after cooldown to ~135°C |
| Power-Good Status Flag | Open-drain PG signal confirms output stability post-startup, enabling system sequencing |
Applications
| USB Power Delivery | Smartphone Power Rail Control |
|---|---|
Use Scenario: Managing VBUS power switching in USB-C PD sink applications with dynamic voltage negotiation. IC Role / Device Role / Timing Role: Load switch enabling/disabling 5–12 V power rails based on PD controller commands. Use Value: Reverse current blocking prevents backfeed into PD controller; PG flag synchronizes firmware power-state transitions. | Use Scenario: Controlling camera module or display backlight power in smartphones with strict inrush limits. IC Role / Device Role / Timing Role: Precision current-limited power gate with soft-start for sensitive peripheral rails. Use Value: 2.5 A rating and ±15% current limit ensure safe activation of high-capacity loads without brownout. |
| Industrial IoT Sensor Node | POS Terminal Peripheral Power |
Use Scenario: Powering wireless transceivers and analog front-ends in battery-operated edge sensors. IC Role / Device Role / Timing Role: Low-quiescent-load switch enabling deep-sleep mode with 25 µA shutdown current. Use Value: Ultra-low IQ extends battery life; thermal shutdown protects against enclosure overheating. | Use Scenario: Isolating printer, scanner, or card reader power in point-of-sale terminals during idle periods. IC Role / Device Role / Timing Role: Controlled hot-swap switch with power-good confirmation for peripheral enumeration. Use Value: PG signal informs host MCU when peripheral rail is stable, enabling reliable USB enumeration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS22919DCKR | Lower RDS(on) (19 mΩ), fixed 2 A current limit, no ILIM adjustment | Lacks adjustable current limit and reverse blocking; requires external diode for backfeed prevention | Preferred where minimal dropout and compact size outweigh need for programmability |
| ON Semi NIS5132MN | Higher current rating (3.5 A), no PG flag, thermal shutdown only (no auto-restart) | Missing power-good signaling and soft-start control; less suitable for sequenced systems | Selected when higher current capacity is primary requirement and sequencing support is not needed |
Compared with TPS22919DCKR and NIS5132MN, the AOZ8212CI-12L uniquely combines adjustable current limiting, reverse current blocking, and a power-good flag in an SOIC-8 package-enabling robust, self-contained power rail control without external components or firmware compensation.
Availability
AoZ8212CI-12L is available at Aetrix Electronics and suitable for USB power delivery systems, smartphone peripheral power management, and industrial IoT sensor node designs requiring stable component supply and long-term lifecycle support.
Supply support for AOZ8212CI-12L 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
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, IGBTs, and power ICs for computing, consumer, and industrial markets.
The AOZ8212CI-12L belongs to AOS's Green Load Switch family, designed specifically for energy-efficient, thermally robust power rail control in space-constrained portable and embedded systems.
FAQ
What is the maximum input voltage rating for the AOZ8212CI-12L?
The AOZ8212CI-12L supports an absolute maximum input voltage of 13.2 V, with recommended continuous operation from 2.7 V to 12 V. Exceeding 13.2 V risks permanent damage to the internal MOSFET and control circuitry. This rating is verified per AOS's official datasheet revision 1.2 and applies across the full operating temperature range of –40°C to +125°C.
Does the AOZ8212CI-12L provide reverse current blocking, and how is it implemented?
Yes, the AOZ8212CI-12L provides integrated reverse current blocking. It uses an internal N-channel MOSFET configured with body-diode orientation and gate control logic that actively turns off the channel when OUT voltage exceeds IN voltage-preventing backflow without requiring an external Schottky diode. This function remains active during both enabled and disabled states.
How is current limit set on the AOZ8212CI-12L, and what is its default value?
The AOZ8212CI-12L current limit is set via the ILIM pin: connecting a resistor between ILIM and GND adjusts the threshold, with 0 Ω yielding the factory-trimmed default of 2.5 A ±15%. No external sense resistor is required. The internal current-sense amplifier and comparator operate independently of load capacitance or PCB layout parasitics.
What does the "L" suffix in AOZ8212CI-12L signify?
The "L" suffix in AOZ8212CI-12L indicates compliance with AOS's Green Policy: halogen-free molding compound (Br/Cl <900 ppm each, total ≤1500 ppm) and antimony-free flame retardant. This version was fully transitioned by end-2010 and replaces non-halogen-free variants in SOIC-8 packaging.
Can the AOZ8212CI-12L be used without connecting the SS (soft-start) pin?
Yes, the AOZ8212CI-12L can operate with the SS pin left unconnected (floating), resulting in minimum internal soft-start time (~1 ms). However, for loads exceeding 1000 µF or systems sensitive to inrush, AOS recommends connecting a 1 nF–10 nF capacitor to ground to extend ramp time and prevent input rail sag or false undervoltage lockout.
AOZ8212CI-12L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 15V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 10pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23A-3
AOZ8212CI-12L FAQ
1.How can I place an order for AOZ8212CI-12L through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8212CI-12L 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 AOZ8212CI-12L reliable?
The price and inventory of AOZ8212CI-12L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8212CI-12L is usually 5 days.
3.What payment methods are accepted for AOZ8212CI-12L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8212CI-12L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8212CI-12L?
AOZ8212CI-12L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8212CI-12L 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 AOZ8212CI-12L?
For technical support, including AOZ8212CI-12L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8212CI-12L requirements.
6.How does Aetrix verify that AOZ8212CI-12L is sourced from the original manufacturer or authorized distributors?
All AOZ8212CI-12L 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 AOZ8212CI-12L meets industry standards.
7.What is the process for return or replacement of AOZ8212CI-12L?
All AOZ8212CI-12L units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8212CI-12L, 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 AOZ8212CI-12L part is unused and in its original packaging.
Return procedure for AOZ8212CI-12L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8212CI-12L Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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