AOZ1038PI Equivalent & Substitute Parts

Part Overview

The AOZ1038PI is a buck switching regulator IC from Alpha & Omega Semiconductor Inc., designed for step-down voltage conversion with positive adjustable output. This device delivers 6A output current across an input voltage range of 4.5V to 18V, with adjustable output from 0.8V to 18V. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility while meeting the same electrical specifications and package requirements.

Substiute Parts

AOZ1038PI

Alpha & Omega Semiconductor Inc.In Stock: 23494AOZ1038PI Datasheet

Current PartRFQ

MP2380DN-LF

Monolithic Power Systems Inc.In Stock: 938MP2380DN-LF Datasheet

MFR RecommendedRFQ

MP9186GQ-Z

Monolithic Power Systems Inc.In Stock: 19752MP9186GQ-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AOZ1038PI are evaluated based on the following critical parameters that determine functional compatibility:

• Topology & Function: Buck switching regulator with step-down conversion
• Output Configuration: Positive adjustable output from 0.8V minimum
• Input Voltage Range: Minimum 4.5V, maximum at least 18V
• Output Current: 6A capability
• Package Type: Surface mount with compatible pinout and thermal characteristics
• Compliance: ROHS3 compliance and operating temperature range

Two substitute parts meet these criteria with varying trade-offs in package form factor and synchronous rectification implementation.

Parameter Comparison

Engineering Selection Recommendations

MP2380DN-LF is suitable for applications where the 8-SOIC package footprint must be maintained and input voltage does not exceed 21V. This part provides direct package compatibility with the AOZ1038PI. However, the output current is rated at 5A, which is 1A lower than the original specification. The absence of synchronous rectification results in higher power dissipation compared to the AOZ1038PI. This substitute is appropriate for designs with reduced current requirements or where thermal management is not critical.

MP9186GQ-Z is the preferred substitute for applications requiring full 6A output current and synchronous rectification efficiency. This part maintains the 6A current rating and includes synchronous rectification, matching the thermal and efficiency characteristics of the AOZ1038PI. The extended operating temperature range to 125°C (TJ) provides additional thermal margin. The package change from 8-SOIC to 14-PowerVFQFN requires PCB layout modification but offers improved thermal performance through the larger package footprint. This substitute is recommended for new designs and production transitions where PCB redesign is feasible.

Both substitutes are active products with ROHS3 compliance and meet the input voltage and adjustable output voltage specifications of the original part.

Frequently Asked Questions (FAQ)

Q: Can MP2380DN-LF directly replace AOZ1038PI in existing designs?

A: MP2380DN-LF provides direct 8-SOIC package compatibility and can be used as a pin-compatible substitute. However, the 5A output current rating is lower than the 6A specification of AOZ1038PI. Verify that your application does not require the full 6A output current. The lack of synchronous rectification will increase power dissipation and heat generation compared to the original part.

Q: What are the advantages of MP9186GQ-Z over MP2380DN-LF?

A: MP9186GQ-Z maintains the full 6A output current rating and includes synchronous rectification for improved efficiency and reduced thermal dissipation. The extended operating temperature range to 125°C provides additional thermal headroom. The trade-off is a package change from 8-SOIC to 14-PowerVFQFN, requiring PCB layout modification.

Q: Does the package change from 8-SOIC to 14-PowerVFQFN affect circuit design?

A: The 14-PowerVFQFN package is larger and offers improved thermal characteristics through increased copper area and thermal vias. Pin assignments differ between the packages, requiring schematic and PCB layout updates. Thermal performance typically improves with the larger package, allowing better heat dissipation in high-current applications.

Q: Are both substitutes compatible with the same input and output voltage ranges?

A: Both substitutes support the 4.5V minimum input voltage and 0.8V minimum adjustable output voltage of the AOZ1038PI. MP2380DN-LF supports input up to 21V and output up to 18.9V, while MP9186GQ-Z supports input up to 20V and output up to 18V. Both exceed the original 18V input specification, providing design flexibility.

Q: What is the impact of switching frequency differences?

A: AOZ1038PI operates at 450kHz, MP2380DN-LF at 600kHz, and MP9186GQ-Z at 500kHz. Higher switching frequencies reduce output filter component size but increase switching losses. The frequency differences are within typical design tolerances and do not prevent substitution. Filter component values may require adjustment based on the specific switching frequency.

Q: Are there moisture sensitivity or storage considerations for these substitutes?

A: AOZ1038PI and MP9186GQ-Z both have MSL 1 (Unlimited), allowing indefinite storage without moisture precautions. MP2380DN-LF has MSL 2A (4 Weeks), requiring controlled storage conditions and baking before reflow if storage exceeds 4 weeks. Plan inventory management accordingly if using MP2380DN-LF in high-volume production.