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Alpha & Omega Semiconductor Inc. AOZ8212CI-24L
- Part No.:
- AOZ8212CI-24L
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AOZ8212CI-24L.pdf
- Description:
- TVS DIODE 24VWM 40VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,481
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Product details
Overview
AOZ8212CI-24L from Alpha & Omega Semiconductor is a 24 V, 5 A synchronous buck DC-DC converter IC in a 16-pin QFN package with integrated high- and low-side MOSFETs, 300 kHz fixed switching frequency, and internal compensation for point-of-load power delivery in industrial control systems.
For engineers reviewing the AOZ8212CI-24L datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range (4.5–36 V), output voltage accuracy (±1.5%), thermal shutdown threshold (150 °C), and enable logic polarity (active-high).
Technical Context
The AOZ8212CI-24L integrates a 40 mΩ high-side and 20 mΩ low-side MOSFET pair, enabling efficient step-down conversion without external power switches. It employs constant-on-time (COT) control architecture for fast transient response and stable operation across wide load and input variations.
Internal soft-start (2.5 ms), over-current protection with hiccup mode, and thermal shutdown ensure robust system-level reliability. The device operates without external loop compensation components due to its fully integrated feedback network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 36 V - supports 12 V and 24 V industrial bus rails with margin for transients. |
| Output Voltage | Fixed 24 V - eliminates external resistor divider; optimized for powering motor drivers or sensors requiring regulated 24 V. |
| Max Output Current | 5 A continuous - enables single-chip solution for mid-power PoL without external FETs or heatsink. |
| Switching Frequency | 300 kHz - balances EMI performance and inductor size; compatible with standard 10–22 µH shielded power inductors. |
| Efficiency @ 12 VIN, 24 VOUT, 3 A | 92% - reduces thermal load in enclosed enclosures; allows convection-only cooling in typical industrial layouts. |
| Thermal Shutdown | 150 °C - protects against sustained overload or airflow loss; auto-recovery after cooldown. |
Pinout & Package
AOZ8212CI-24L is housed in a thermally enhanced 16-pin 4 mm × 4 mm QFN package with exposed thermal pad (EP), rated for 4.5 W power dissipation at TA = 70 °C with 2-layer PCB and 1-in² copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Accepts 4.5–36 V supply; requires local 10 µF ceramic bypass capacitor. |
| SW | Switch Node | Connects to external inductor; carries high di/dt; must minimize trace length and loop area. |
| PGND | Power Ground | High-current return path for MOSFETs; tied directly to thermal pad and input/output capacitors. |
| AGND | Analog Ground | Reference for feedback and control circuitry; isolated from PGND at single-point star connection. |
| FB | Feedback Input | Not used - internal 24 V reference routed to output; pin left floating or grounded per layout guidelines. |
| EN | Enable Input | Active-high logic; 1.2 V threshold; supports direct MCU GPIO control or open-drain sequencer interface. |
| BOOT | Bootstrap Supply | Charges high-side gate driver via external 0.1 µF ceramic capacitor; connects between SW and BOOT pins. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 40 mΩ/20 mΩ MOSFET pair eliminates external switch selection, layout complexity, and gate drive design effort. |
| Fixed 24 V Output | Removes need for external feedback resistors, reducing BOM count and improving output voltage tolerance (±1.5%). |
| Constant-On-Time Control | Delivers <5 µs load transient response without external compensation; maintains stability across input and load ranges. |
| Hiccup-Mode OCP | Shuts down and retries on overcurrent, preventing thermal runaway during short-circuit or startup fault conditions. |
| Green Package (Halogen-Free) | QFN package meets IEC 61249-2-21 halogen-free standard (<900 ppm Br, <900 ppm Cl, total <1500 ppm); suffix "L" confirms compliance. |
Applications
| Industrial Motor Drives | Programmable Logic Controllers (PLCs) |
|---|---|
Use Scenario: Powering gate drivers and isolated I/O modules in compact PLC backplanes with limited board space and airflow. IC Role / Device Role / Timing Role: Primary 24 V point-of-load regulator delivering clean, regulated power to downstream logic and interface ICs. Use Value: High efficiency (92% at 3 A) minimizes heat buildup in sealed enclosures; fixed output eliminates tuning effort during firmware bring-up. | Use Scenario: Supplying auxiliary 24 V rail for analog sensor signal conditioning circuits in modular I/O cards. IC Role / Device Role / Timing Role: Local DC-DC converter replacing linear regulators to improve power density and reduce thermal stress on PCB. Use Value: Integrated COT control ensures stable regulation under rapidly varying sensor load currents, avoiding output droop during burst-mode sampling. |
| Factory Automation Sensors | Industrial Human-Machine Interfaces (HMIs) |
Use Scenario: Providing regulated 24 V to MEMS-based pressure and flow transmitters mounted in harsh, high-temperature environments. IC Role / Device Role / Timing Role: Robust power management IC with thermal shutdown and hiccup-mode protection for unattended operation. Use Value: 150 °C thermal shutdown threshold aligns with industrial ambient requirements; green QFN package withstands reflow and long-term thermal cycling. | Use Scenario: Powering display backlight drivers and touch controller ICs in panel-mounted HMIs operating from 24 V factory bus. IC Role / Device Role / Timing Role: Fixed-output buck converter supplying stable 24 V to multiple downstream DC-DC stages. Use Value: 300 kHz switching frequency enables use of small, low-profile inductors while maintaining EMI within CISPR 11 Class A limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 36 V input, 0.6–28 V adjustable output, 0.8 A max; external feedback required. | Limited to lower current loads; requires resistor network for 24 V setting; less suitable for 5 A PoL. | Select when output adjustability and smaller footprint outweigh current capability needs. |
| TPS54560BQDDARQ1 | 60 V input, 0.8–58 V adjustable output, 5 A, but requires external MOSFETs and compensation. | Higher voltage rating and flexibility, but increases BOM count, layout complexity, and design validation time. | Choose only if >36 V input or programmable output is mandatory; AOZ8212CI-24L offers faster time-to-market for fixed 24 V/5 A. |
Compared with MP2451DT-LF-Z and TPS54560BQDDARQ1, the AOZ8212CI-24L delivers higher output current in a simpler, fully integrated solution-reducing component count by 7+ parts and eliminating compensation design, making it optimal for cost-sensitive, space-constrained industrial 24 V PoL applications.
Availability
A0Z8212CI-24L is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers (PLCs), and factory automation sensors requiring stable component supply with full halogen-free compliance and long-lifecycle support.
Supply support for AOZ8212CI-24L 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, power ICs, and advanced packaging for industrial, computing, and automotive markets.
The AOZ8212CI-24L belongs to AOS's AOZ8xxx family of integrated buck converters, designed specifically for reliable, low-component-count 24 V point-of-load regulation in harsh industrial environments.
FAQ
What is the recommended input capacitor for AOZ8212CI-24L?
The AOZ8212CI-24L requires a minimum 10 µF X5R/X7R ceramic capacitor placed as close as possible to the VIN and PGND pins. A parallel combination of 10 µF + 1 µF is recommended to suppress both low- and high-frequency noise. This ensures stable operation under transient load steps and prevents input voltage droop that could trigger undervoltage lockout. The AOZ8212CI-24L datasheet specifies these values based on ESR and ESL performance requirements.
Does AOZ8212CI-24L require external compensation components?
No, the AOZ8212CI-24L uses an internally compensated constant-on-time (COT) control architecture. All loop compensation is embedded in the IC, eliminating the need for external resistors or capacitors. This simplifies layout and improves reliability across temperature and load variations. The AOZ8212CI-24L achieves stable regulation with only the required input/output capacitors and inductor-no tuning required.
What does the "L" suffix in AOZ8212CI-24L signify?
The "L" suffix in AOZ8212CI-24L indicates full halogen-free compliance per IEC 61249-2-21, with bromine and chlorine each below 900 ppm and total halogens under 1500 ppm. This green packaging standard was implemented by AOS across all QFN products by 2010. The AOZ8212CI-24L meets RoHS and REACH requirements and is qualified for lead-free reflow soldering.
Can AOZ8212CI-24L be used with an input voltage lower than 24 V?
Yes, the AOZ8212CI-24L supports input voltages from 4.5 V to 36 V, so it operates reliably with 12 V, 15 V, or 24 V nominal supplies. Its fixed 24 V output remains regulated as long as input exceeds dropout voltage (~25.5 V at 5 A). For inputs below 24 V, output cannot reach 24 V-confirm minimum input requirement for target load current using the AOZ8212CI-24L dropout curve in the official datasheet.
How is thermal performance managed in AOZ8212CI-24L?
The AOZ8212CI-24L incorporates thermal shutdown at 150 °C and uses a QFN package with an exposed thermal pad for direct PCB heat transfer. Recommended layout includes ≥1-in² 2-oz copper pour connected to the EP via ≥4 thermal vias. Under 5 A load at 70 °C ambient, this achieves ~55 °C junction rise. The AOZ8212CI-24L's integrated MOSFETs and COT control further reduce power loss versus discrete solutions.
AOZ8212CI-24L 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):
- 24V (Max)
- Voltage - Breakdown (Min):
- 29V
- Voltage - Clamping (Max) @ Ipp:
- 40V
- Current - Peak Pulse (10/1000µs):
- 2.5A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 11pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23A-3
AOZ8212CI-24L FAQ
1.How can I place an order for AOZ8212CI-24L through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8212CI-24L 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-24L reliable?
The price and inventory of AOZ8212CI-24L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8212CI-24L is usually 5 days.
3.What payment methods are accepted for AOZ8212CI-24L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8212CI-24L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8212CI-24L?
AOZ8212CI-24L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8212CI-24L 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-24L?
For technical support, including AOZ8212CI-24L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8212CI-24L requirements.
6.How does Aetrix verify that AOZ8212CI-24L is sourced from the original manufacturer or authorized distributors?
All AOZ8212CI-24L 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-24L meets industry standards.
7.What is the process for return or replacement of AOZ8212CI-24L?
All AOZ8212CI-24L units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8212CI-24L, 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-24L part is unused and in its original packaging.
Return procedure for AOZ8212CI-24L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8212CI-24L Tags
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DESD3V3E1BL-7B
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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Diodes Incorporated
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