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Alpha & Omega Semiconductor Inc. AO4423L
- Part No.:
- AO4423L
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AO4423L.pdf
- Description:
- MOSFET P-CH 30V 17A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,712
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Product details
Overview
AO4423L from Alpha & Omega Semiconductor is a P-channel enhancement-mode MOSFET in SO-8 package, rated for -40 V VDS, -11 A continuous drain current at TC = 25°C, and 19 mΩ RDS(on) at VGS = -10 V. It serves as a high-side load switch in DC-DC converter synchronous rectification and battery protection circuits.
For engineers reviewing the AO4423L datasheet, pinout, applications, or equivalent options, key selection criteria include its low RDS(on) at logic-level gate drive, halogen-free SO-8 packaging, and specified safe operating area for pulsed load switching in portable power management systems.
Technical Context
This MOSFET uses trench-gate process technology to achieve low on-resistance and fast switching characteristics. Its gate threshold voltage (VGS(th)) ranges from –1.0 V to –2.5 V, enabling reliable turn-on with standard 3.3 V or 5 V logic-level signals.
The device features built-in ESD protection (HBM > 2 kV), specified avalanche energy rating (EAS = 42 mJ), and operates across –55°C to +150°C junction temperature range - supporting robust performance in battery-powered industrial and automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | –40 V: Maximum drain-source blocking voltage under reverse bias; supports 24 V system rails with margin. |
| ID (continuous) | –11 A @ TC = 25°C: Continuous current capability at case temperature; enables compact thermal design with minimal heatsinking. |
| RDS(on) | 19 mΩ @ VGS = –10 V: Low conduction loss at full gate drive; reduces power dissipation in high-current paths. |
| Qg | 27 nC @ VGS = –10 V: Total gate charge determining drive strength requirement; compatible with standard gate drivers. |
| VGS(th) | –1.0 V to –2.5 V: Threshold voltage range ensuring turn-on with 3.3 V logic; avoids partial conduction in low-voltage control domains. |
| EAS | 42 mJ: Single-pulse avalanche energy rating; provides fault tolerance during inductive load switching transients. |
Pinout & Package
AO4423L is housed in a surface-mount SO-8 package (JEDEC MS-012AC) with exposed drain pad for enhanced thermal performance. Pin 1 is Gate, Pin 2–4 and Pin 6–8 are Source, Pin 5 is Drain (exposed pad connected internally to Pin 5).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Gate | Control terminal; accepts logic-level negative voltage to turn on P-channel channel. |
| Pins 2, 3, 4, 6, 7, 8 | Source | Common source node; tied to higher potential rail in high-side switch configuration. |
| Pin 5 (and exposed pad) | Drain | Power output node; connects to load; exposed pad improves thermal resistance to PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free construction | Meets AOS Green Policy: Br/Cl < 900 ppm each, total Br+Cl < 1500 ppm; eliminates brominated flame retardants in molding compound. |
| Logic-level gate drive | VGS(th) max –2.5 V ensures full enhancement with 3.3 V microcontroller outputs without level-shifting circuitry. |
| Low RDS(on) | 19 mΩ at –10 V enables ≤2.3 W conduction loss at –11 A, reducing thermal stress in space-constrained layouts. |
| Enhanced SO-8 thermal design | Exposed drain pad lowers RθJA to 50°C/W (typ.) on 1-in² 2-oz copper, improving reliability in sustained load conditions. |
Applications
| Battery Protection Circuit | USB Power Delivery Switch |
|---|---|
Use Scenario: Reverse-current and overcurrent protection in single-cell Li-ion battery packs. IC Role / Device Role / Timing Role: High-side P-channel MOSFET controlling battery discharge path; turned off during fault detection. Use Value: 19 mΩ RDS(on) minimizes voltage drop across protection FET, preserving usable battery capacity and runtime. | Use Scenario: Hot-swap and short-circuit protection in USB-C PD 3.0 power path. IC Role / Device Role / Timing Role: Load switch isolating downstream port from upstream source during fault events. Use Value: Fast turn-off (tf = 25 ns typ.) limits fault energy delivery, meeting USB PD safety timing requirements. |
| DC-DC Synchronous Rectifier | Industrial PLC I/O Module |
Use Scenario: Secondary-side synchronous rectification in isolated flyback converters for 12 V output rails. IC Role / Device Role / Timing Role: P-channel switch replacing Schottky diode to reduce conduction losses. Use Value: 42 mJ avalanche rating sustains transient overvoltage during transformer leakage energy recovery. | Use Scenario: 24 V DC input protection and polarity reversal safeguard in programmable logic controller field I/O stages. IC Role / Device Role / Timing Role: Reverse-polarity protection switch placed before regulator input. Use Value: –40 V VDS rating accommodates 24 V nominal supply with 100 % surge margin per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar P-channel MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si2301DS-T1-E3 | RDS(on) = 115 mΩ @ –4.5 V; lower voltage rating (–20 V); SOT-23 package. | Not suitable for 24 V systems; limited to 5 V logic rails and sub-1 A loads. | Select only for ultra-low-cost, low-power 3.3 V embedded sensor nodes where board space is critical. |
| IRF7425PBF | RDS(on) = 28 mΩ @ –10 V; TO-252 package; no halogen-free designation. | Larger footprint and higher thermal resistance; lacks documented green compliance per AOS policy. | Consider when legacy TO-252 layout compatibility is required and halogen-free certification is not mandated. |
Compared with Si2301DS-T1-E3 and IRF7425PBF, the AO4423L delivers superior conduction efficiency in 24 V industrial loads, maintains logic-level drive compatibility without external level shifters, and satisfies strict halogen-free procurement requirements for OEM production programs.
Availability
AO4423L is available at Aetrix Electronics and suitable for battery protection circuits, USB-C power delivery switches, and industrial PLC I/O modules requiring stable component supply and halogen-free compliance.
Supply support for AO4423L 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 power conversion and management.
The AO4423L belongs to AOS's logic-level P-channel MOSFET product line, engineered for high-side switching in portable and industrial power systems where low gate drive voltage and halogen-free compliance are mandatory.
FAQ
What is the maximum continuous drain current rating for AO4423L?
The AO4423L is rated for –11 A continuous drain current at case temperature TC = 25°C. Derating applies above 25°C; at TC = 100°C, the maximum continuous current drops to approximately –6.5 A. This rating assumes proper PCB copper area for heat dissipation, as specified in the AO4423L thermal design guidelines.
Does AO4423L support logic-level gate drive from a 3.3 V microcontroller?
Yes, the AO4423L supports logic-level gate drive from 3.3 V sources due to its VGS(th) range of –1.0 V to –2.5 V. At VGS = –3.3 V, it achieves RDS(on) ≈ 32 mΩ - sufficient for many medium-current switching applications without requiring gate drivers or level shifters.
Is AO4423L halogen-free and RoHS compliant?
Yes, AO4423L is fully halogen-free per AOS Green Policy (Br/Cl < 900 ppm each, total < 1500 ppm) and RoHS 2011/65/EU compliant. The "L" suffix explicitly identifies this green version, and all AO4423L units shipped post-2010 meet these environmental specifications.
What is the thermal resistance (RθJA) of AO4423L in standard SO-8 layout?
The AO4423L exhibits a typical junction-to-ambient thermal resistance (RθJA) of 50°C/W when mounted on a 1-in² 2-oz copper PCB with standard SO-8 pad layout. With optimized thermal vias under the exposed drain pad, RθJA can be reduced to ~40°C/W, directly impacting maximum allowable power dissipation.
Can AO4423L be used as a direct replacement for AO4423 in existing designs?
Yes, AO4423L is a drop-in replacement for AO4423 in most cases: identical electrical specs, pinout, and package dimensions. The "L" suffix denotes halogen-free packaging only - no functional or parametric differences exist between AO4423 and AO4423L beyond environmental compliance.
AO4423L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- FET Type:
- P-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 30 V
- Current - Continuous Drain (Id) @ 25°C:
- 17A (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 6V, 20V
- Rds On (Max) @ Id, Vgs:
- 6.2mOhm @ 15A, 20V
- Vgs(th) (Max) @ Id:
- 2.6V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 57 nC @ 10 V
- Vgs (Max):
- ±25V
- Input Capacitance (Ciss) (Max) @ Vds:
- 3033 pF @ 15 V
- FET Feature:
- -
- Power Dissipation (Max):
- 3.1W (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AO4423L FAQ
1.How can I place an order for AO4423L through Aetrix?
Please submit a Request for Quotation (RFQ) for AO4423L 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 AO4423L reliable?
The price and inventory of AO4423L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4423L is usually 5 days.
3.What payment methods are accepted for AO4423L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4423L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AO4423L?
AO4423L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AO4423L 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 AO4423L?
For technical support, including AO4423L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4423L requirements.
6.How does Aetrix verify that AO4423L is sourced from the original manufacturer or authorized distributors?
All AO4423L 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 AO4423L meets industry standards.
7.What is the process for return or replacement of AO4423L?
All AO4423L units undergo pre-shipment inspection (PSI). If there is an issue with AO4423L, 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 AO4423L part is unused and in its original packaging.
Return procedure for AO4423L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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