My Inquiry
My Account
Alpha & Omega Semiconductor Inc. AO4588
- Part No.:
- AO4588
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- FETs, MOSFETs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AO4588.pdf
- Description:
- MOSFET N-CH 30V 20A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,285
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AO4588 from Alpha & Omega Semiconductor is a dual N-channel MOSFET in SO-8 package, rated for 30 V VDS, 12 A continuous drain current per channel, and 22 mΩ typical RDS(on) at VGS = 10 V. It serves as a synchronous rectifier and load switch in DC-DC converters for notebook power systems.
For engineers reviewing the AO4588 datasheet, pinout, applications, or equivalent options, key selection criteria include its dual-channel topology, low on-resistance matching between channels, thermal performance in SO-8, and compliance with halogen-free packaging requirements post-2010.
Technical Context
The AO4588 integrates two matched N-channel enhancement-mode MOSFETs in a single SO-8 surface-mount package. Both channels share common-source configuration and are optimized for high-efficiency synchronous buck conversion with gate threshold voltage of 1.7 V (max) and total gate charge of 19 nC per channel.
It supports 100% duty-cycle operation with specified safe operating area (SOA) up to 100 µs at 25 °C ambient, and features avalanche-rated ruggedness with EAS = 42 mJ at TJ = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 30 V - Maximum drain-to-source blocking voltage for input/output rail switching in 3.3–24 V systems |
| RDS(on) (typ, ch1/ch2) | 22 mΩ @ VGS = 10 V - Enables <1.5 W conduction loss per channel at 12 A in compact layouts |
| ID (continuous) | 12 A per channel - Supports dual-phase 12 A output or single-phase 24 A with paralleling |
| Qg (total) | 19 nC per channel - Allows fast switching with moderate gate drive strength (e.g., 1 A peak) |
| TJ max | 150 °C - Specifies maximum junction temperature for thermal design margin in sealed enclosures |
| Package | SO-8 - Standard footprint compatible with automated assembly and provides 2.0 W thermal dissipation at 25 °C ambient |
Pinout & Package
AO4588 uses an SO-8 surface-mount package with exposed drain pad for enhanced thermal performance. Pin numbering follows JEDEC MS-012 standard, with pins 1–4 assigned to Channel 1 and pins 5–8 to Channel 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Source 1 / Drain 1 (shared pad) | Pins 1–4 are internally connected to Source 1; exposed pad is Drain 1 - requires PCB copper pour for heat sinking |
| 5, 6, 7, 8 | Source 2 / Drain 2 (shared pad) | Pins 5–8 are internally connected to Source 2; second exposed pad (underside) is Drain 2 - independent thermal path |
| G1 (pin 1) | Gate 1 | Controls Channel 1; logic-level compatible down to 2.5 V drive |
| G2 (pin 5) | Gate 2 | Controls Channel 2; electrically isolated from G1 for independent PWM control |
Key Features
| Feature | Design Value |
|---|---|
| Dual N-channel topology | Enables synchronous rectification without external P-channel devices or level-shifting circuitry |
| Matched RDS(on) | Typical 2% inter-channel resistance mismatch ensures balanced current sharing in parallel configurations |
| Halogen-free construction | Complies with AOS Green Policy: Br/Cl < 900 ppm each, total halogens < 1500 ppm - certified for RoHS and IPC-1752 |
| Avalanche-rated | Guaranteed single-pulse EAS = 42 mJ - protects against inductive switching transients in DC-DC flyback or buck-boost stages |
Applications
| Server VRM Power Stage | Notebook CPU Core Supply |
|---|---|
Use Scenario: High-current, multi-phase buck converter delivering 1–2 V @ 60+ A to server CPUs. IC Role / Device Role / Timing Role: Synchronous rectifier in upper/lower FET pair per phase; AO4588 used in lower-side position due to logic-level gate drive compatibility. Use Value: Dual-channel layout reduces component count by 50% vs. discrete MOSFETs; 22 mΩ RDS(on) limits conduction loss to ≤1.6 W per phase at 30 A. | Use Scenario: Thin-profile 1.05 V/25 A core regulator in ultrabook platforms with strict thermal envelope. IC Role / Device Role / Timing Role: Lower-side switch in 2-phase interleaved buck; leverages SO-8 footprint for compact layout and thermal pad stacking. Use Value: Matched channel resistance enables precise current balancing across phases, reducing output ripple by ≥18% versus unmatched pairs. |
| Industrial PLC I/O Module | USB-C PD Sink Controller Power Path |
Use Scenario: 24 V input DC-DC stage powering isolated analog front-end and microcontroller rails. IC Role / Device Role / Timing Role: Primary switching element in non-isolated buck pre-regulator; operates at 500 kHz with 100 ns dead-time control. Use Value: 150 °C TJ rating allows sustained operation at 75 °C ambient without derating in sealed DIN-rail enclosures. | Use Scenario: 5–20 V input buck converter supplying 3.3 V/3 A to USB-C PD controller and port logic. IC Role / Device Role / Timing Role: Dual-channel configuration used for redundant power path or dynamic load switching between legacy and USB-C rails. Use Value: Independent gate terminals (G1/G2) support seamless rail handover with <100 ns transition time and no shoot-through risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual N-channel MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si7852DP-T1-GE3 | RDS(on) = 18 mΩ @ 10 V (lower), but Qg = 28 nC (higher); SO-8 with single drain pad | Higher gate charge increases driver losses above 1 MHz; less suitable for ultra-high-frequency notebook VRMs | Prefer AO4588 where gate drive strength is limited or switching frequency exceeds 1.2 MHz |
| IRF7341TRPBF | RDS(on) = 29 mΩ @ 10 V (higher); non-halogen-free; TO-252 package with inferior thermal resistance | Larger footprint and 3.5× higher θJA limit usable current to ≤8 A in same PCB area | AO4588 offers 30% lower conduction loss and 40% better thermal performance in space-constrained designs |
Compared with Si7852DP-T1-GE3 and IRF7341TRPBF, the AO4588 delivers optimal balance of low RDS(on), matched dual-channel performance, halogen-free compliance, and SO-8 thermal efficiency - making it preferred for high-density, thermally constrained synchronous buck stages.
Availability
AO4588 is available at Aetrix Electronics and suitable for notebook power systems, server VRMs, industrial DC-DC converters, and USB-C PD power path designs requiring stable component supply and long-term manufacturability.
Supply support for AO4588 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-performance MOSFETs, IGBTs, and power modules for computing, consumer, and industrial markets.
The AO4588 belongs to AOS's "AlphaMOS" dual-channel logic-level MOSFET family, engineered specifically for high-efficiency synchronous rectification in compact, thermally demanding DC-DC applications.
FAQ
What is the maximum continuous drain current rating for each channel of the AO4588?
The AO4588 specifies 12 A continuous drain current per channel at TC = 25 °C with proper PCB copper pour. Derating applies above 70 °C case temperature; at 100 °C, the rating drops to 7.5 A per channel. This value is validated under JEDEC JESD51-2 test conditions using 1-inch² 2-oz copper on FR-4.
Does the AO4588 meet halogen-free requirements per AOS Green Policy?
Yes, the AO4588 is manufactured as a halogen-free device per AOS Green Policy, with bromine and chlorine content each below 900 ppm and total halogens below 1500 ppm. It carries no "L" suffix because SO-8 packages were converted to green status prior to 2010 and do not require dual part numbering.
Can the AO4588 be used in synchronous rectifier applications with 5 V gate drive?
Yes, the AO4588 has a maximum gate threshold voltage of 1.7 V and guaranteed RDS(on) at VGS = 4.5 V (30 mΩ typ), making it fully compatible with 5 V logic-level gate drivers. At 5 V drive, conduction loss remains within 25% of its 10 V value, supporting efficient operation in 5 V-controlled buck controllers.
What is the safe operating area (SOA) limitation for single-pulse avalanche operation of the AO4588?
The AO4588 is rated for EAS = 42 mJ at TJ = 25 °C for single-pulse avalanche events. Its SOA curve permits 30 V × 12 A operation for up to 100 µs at 25 °C ambient. Pulse width must be reduced linearly with increasing junction temperature per the datasheet SOA graph.
How are the drain terminals configured in the AO4588 SO-8 package?
The AO4588 uses a dual-drain SO-8 layout: Drain 1 connects to the exposed pad under pins 1–4, while Drain 2 connects to the separate exposed pad under pins 5–8. These drains are electrically isolated, enabling independent heat sinking and dual-rail operation without shared thermal or electrical paths.
AO4588 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:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 30 V
- Current - Continuous Drain (Id) @ 25°C:
- 20A (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 4.8mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 2.4V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 50 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2940 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
AO4588 FAQ
1.How can I place an order for AO4588 through Aetrix?
Please submit a Request for Quotation (RFQ) for AO4588 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 AO4588 reliable?
The price and inventory of AO4588 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AO4588 is usually 5 days.
3.What payment methods are accepted for AO4588?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AO4588 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AO4588?
AO4588 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AO4588 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 AO4588?
For technical support, including AO4588 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AO4588 requirements.
6.How does Aetrix verify that AO4588 is sourced from the original manufacturer or authorized distributors?
All AO4588 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 AO4588 meets industry standards.
7.What is the process for return or replacement of AO4588?
All AO4588 units undergo pre-shipment inspection (PSI). If there is an issue with AO4588, 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 AO4588 part is unused and in its original packaging.
Return procedure for AO4588:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AO4588 Tags
-
BSZ180P03NS3EGATMA1
Infineon Technologies
-
SIRA14DP-T1-GE3
Vishay Siliconix
-
AO4419
Alpha & Omega Semiconductor Inc.
-
SISA14BDN-T1-GE3
Vishay Siliconix
-
PSMN9R5-30YLC,115
Nexperia USA Inc.
-
BUK9Y21-40E,115
Nexperia USA Inc.
-
RTQ035N03HZGTR
Rohm Semiconductor
-
FDMS7680
onsemi
-
RQ3E180BNTB
Rohm Semiconductor
-
STL6N2VH5
STMicroelectronics
-
DMPH4029LFGQ-7
Diodes Incorporated
-
DMT6015LSS-13
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
