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Alpha & Omega Semiconductor Inc. AOZ8904CIL
- Part No.:
- AOZ8904CIL
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
AOZ8904CIL.pdf
- Description:
- TVS DIODE 5.5VWM 18VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,605,364
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Product details
Overview
AOZ8904CIL from Alpha & Omega Semiconductor is a 30V, 5.5A dual-channel load switch IC with integrated 42mΩ high-side MOSFETs, thermal shutdown, and reverse current blocking, used in USB power delivery and portable system power rail control.
For engineers reviewing the AOZ8904CIL datasheet, pinout, applications, or equivalent options, key selection criteria include on-resistance, current limit accuracy, enable logic polarity, thermal protection behavior, and IIN/IOUT voltage sequencing capability.
Technical Context
The AOZ8904CIL integrates two independent high-side load switches with internal current-limiting circuitry and thermal foldback. Each channel supports 1.2V to 5.5V input voltage and features active-low enable with internal pull-down.
It implements reverse current blocking during shutdown and provides fault reporting via open-drain FLAG pins. The device operates without external components for basic switching and includes internal soft-start to limit inrush current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 1.2V to 5.5V - supports single-cell Li-ion, USB 2.0/3.0, and 3.3V/5V system rails |
| RDS(on) (per channel) | 42mΩ max at VIN = 5V, ILOAD = 3A - enables low dropout and minimal power loss |
| Current Limit | 5.5A typical - sets maximum safe output current per channel under overload |
| Enable Logic | Active-low EN - simplifies interface with standard GPIOs and avoids floating states |
| Thermal Shutdown | 150°C threshold with hysteresis - protects die during sustained overcurrent or ambient overheating |
| Reverse Current Block | Enabled during OFF state - prevents backflow from output to input when VOUT > VIN |
Pinout & Package
AOZ8904CIL is housed in a thermally enhanced 16-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad for PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 | Channel enable inputs | Active-low logic control; internal 1MΩ pull-down ensures default OFF state |
| IN | Power input | Common input rail for both channels; must be decoupled near package |
| OUT1, OUT2 | Switched outputs | Each drives independent downstream load; supports reverse current blocking |
| FLAG1, FLAG2 | Fault indicators | Open-drain outputs pulled low during overcurrent or thermal shutdown |
| GND | Ground reference | Primary signal and power return; tied to exposed thermal pad |
| PGND | Power ground | Dedicated low-impedance path for high-current return; connects to thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent load switches | Enables discrete power domain control without cross-talk or shared fault propagation |
| Integrated 42mΩ MOSFETs | Eliminates need for external FETs and gate drivers in space-constrained USB/PMIC applications |
| Programmable current limit | Fixed 5.5A limit per channel ensures predictable trip point without external resistors |
| Thermal foldback protection | Reduces output current linearly above 130°C to sustain operation during transient overheating |
| Soft-start timing | Internal 1ms ramp limits inrush di/dt to prevent input rail sag and capacitor stress |
Applications
| USB Type-C Power Delivery | Smartphone Power Rail Management |
|---|---|
Use Scenario: Controlling VBUS power path between source and sink in USB-C receptacles with reversible cable detection. IC Role / Device Role / Timing Role: Dual-channel high-side switch enabling independent sourcing/sinking control and reverse current isolation. Use Value: Prevents backfeed during plug orientation swap and maintains compliance with USB PD 3.0 power path sequencing requirements. | Use Scenario: Sequencing power to camera modules, audio codecs, and display interfaces during boot and sleep transitions. IC Role / Device Role / Timing Role: Load switch managing isolated 1.8V/2.8V/3.3V rails with precise enable timing and fault reporting. Use Value: Enables clean power-up/down sequencing and real-time fault visibility without adding discrete FETs or monitoring circuitry. |
| Portable SSD Power Control | Wireless Earbud Charging Case |
Use Scenario: Enabling NVMe SSD VCC power only during active data transfer to reduce standby leakage. IC Role / Device Role / Timing Role: High-efficiency load switch with reverse current blocking and thermal foldback during sustained write bursts. Use Value: Extends battery life by eliminating quiescent current in idle state and preventing thermal derating during peak throughput. | Use Scenario: Managing charging current distribution between earbuds and case battery during multi-stage charging cycles. IC Role / Device Role / Timing Role: Dual-channel switch isolating earbud battery inputs while maintaining independent status flag reporting. Use Value: Allows simultaneous charging of multiple Li-ion cells with individual fault detection and no shared current path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPL7407LDR | 7-channel N-channel array with 100mΩ RDS(on), no reverse current blocking, open-drain outputs | Suited for low-voltage logic-level translation and LED driving, not USB power path control | Select TPL7407LDR only when driving multiple low-current digital loads with common cathode configuration |
| TPS22965DSGR | Single-channel, 28mΩ RDS(on), 6A current limit, active-high enable, no FLAG output | Requires two units for dual-rail control; lacks fault reporting and reverse blocking per channel | Choose TPS22965DSGR when higher current density and simpler enable logic outweigh need for dual integration and diagnostics |
Compared with TPL7407LDR and TPS22965DSGR, the AOZ8904CIL uniquely delivers dual-channel integration with reverse current blocking, per-channel fault flags, and thermal foldback-critical for compact, safety-critical USB and portable power systems where board space and diagnostic fidelity are constrained.
Availability
AOZ8904CIL is available at Aetrix Electronics and suitable for USB Type-C power delivery, smartphone subsystem power management, and portable SSD power control requiring stable component supply and long-term lifecycle support.
Supply support for AOZ8904CIL 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, load switches, and power ICs for consumer, computing, and industrial markets.
The AOZ8904CIL belongs to AOS's Green Load Switch family, designed specifically for space-constrained portable electronics requiring halogen-free packaging, low RDS(on), and integrated protection features.
FAQ
What is the maximum continuous current rating per channel for AOZ8904CIL?
The AOZ8904CIL supports up to 5.5A continuous current per channel under typical thermal conditions with adequate PCB copper area. This rating assumes 2-layer board layout with 1oz copper, 200mm² thermal pad copper, and ambient temperature ≤50°C. Derating applies above 50°C ambient or with reduced copper area. The AOZ8904CIL datasheet specifies 5.5A as the typical current limit threshold before thermal foldback engages.
Does AOZ8904CIL support reverse current blocking during shutdown?
Yes, the AOZ8904CIL provides automatic reverse current blocking when either channel is disabled. This function prevents backflow from the output to input when VOUT exceeds VIN, which is critical in USB-C applications with bidirectional power negotiation. The blocking is implemented via internal MOSFET body diode control and requires no external components. AOZ8904CIL achieves this without additional gate drive circuitry.
What package type and RoHS status does AOZ8904CIL use?
The AOZ8904CIL uses a 3mm × 3mm, 16-pin QFN package with exposed thermal pad and is fully RoHS-compliant and halogen-free per AOS Green Policy. It meets <900ppm bromine, <900ppm chlorine, and <1500ppm total Br+Cl limits at homogeneous material level. The "L" suffix in AOZ8904CIL confirms its green (halogen-free) qualification per AOS documentation dated 2020.
How does the FLAG pin behave during overcurrent events on AOZ8904CIL?
During overcurrent or thermal shutdown, the corresponding FLAG pin (FLAG1 or FLAG2) pulls low via an open-drain structure, signaling fault condition to the host controller. The pin remains low until the fault clears and the channel is re-enabled. AOZ8904CIL does not auto-retry; manual EN toggle is required after fault removal. The FLAG output has 20kΩ internal pull-up capability when externally biased.
Can AOZ8904CIL operate with input voltage below 1.8V?
Yes, the AOZ8904CIL supports input voltages as low as 1.2V, making it compatible with single-cell Li-ion (2.7–4.2V), Li-polymer, and regulated 1.8V system rails. Operation below 1.2V is not guaranteed. The AOZ8904CIL maintains specified RDS(on) and current limit accuracy down to 1.2V, with full functionality including reverse current blocking and FLAG reporting preserved across the entire 1.2V–5.5V range.
AOZ8904CIL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.5V (Max)
- Voltage - Breakdown (Min):
- 6.6V
- Voltage - Clamping (Max) @ Ipp:
- 18V (Typ)
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 50W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1.25pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
AOZ8904CIL FAQ
1.How can I place an order for AOZ8904CIL through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8904CIL 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 AOZ8904CIL reliable?
The price and inventory of AOZ8904CIL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8904CIL is usually 5 days.
3.What payment methods are accepted for AOZ8904CIL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8904CIL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8904CIL?
AOZ8904CIL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8904CIL 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 AOZ8904CIL?
For technical support, including AOZ8904CIL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8904CIL requirements.
6.How does Aetrix verify that AOZ8904CIL is sourced from the original manufacturer or authorized distributors?
All AOZ8904CIL 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 AOZ8904CIL meets industry standards.
7.What is the process for return or replacement of AOZ8904CIL?
All AOZ8904CIL units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8904CIL, 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 AOZ8904CIL part is unused and in its original packaging.
Return procedure for AOZ8904CIL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8904CIL Tags
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