AOZ1242AI Equivalent & Substitute Parts

Part Overview

The AOZ1242AI is a buck switching regulator IC from Alpha & Omega Semiconductor Inc., designed for positive adjustable step-down voltage regulation with 3A output current capability in an 8-SOIC package. This device is part of the EZBuck™ series and is currently classified as obsolete. Due to its discontinued status, equivalent substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and system maintenance.

Substiute Parts

AOZ1242AI

Alpha & Omega Semiconductor Inc.In Stock: 1818AOZ1242AI Datasheet

Current PartRFQ

L7986ATR

STMicroelectronicsIn Stock: 17811L7986ATR Datasheet

MFR RecommendedRFQ

MP4462DN-LF-Z

Monolithic Power Systems Inc.In Stock: 65135MP4462DN-LF-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AOZ1242AI are selected based on the following critical parameters that define functional equivalence:

Core Substitution Criteria:

• Topology: Buck (step-down) switching regulator
• Output Configuration: Positive adjustable voltage regulation
• Package Type: 8-SOIC (0.154", 3.90mm Width) form factor
• Output Current Capability: Minimum 3A
• Input Voltage Range: Minimum 4.5V support
• Output Voltage Adjustability: Minimum 0.8V minimum output voltage
• Mounting Type: Surface Mount

The identified substitute parts meet these electrical and mechanical requirements, enabling direct functional replacement in applications designed for the AOZ1242AI.

Parameter Comparison

Engineering Selection Recommendations

L7986ATR (STMicroelectronics): This substitute offers active product status with extended operating temperature range (-40°C to 150°C junction temperature) compared to the AOZ1242AI. The L7986ATR supports a lower minimum output voltage (0.6V) and higher maximum input voltage (38V), providing greater design flexibility. It maintains the same 3A output current and 8-SOIC package footprint. RoHS3 compliance and REACH unaffected status align with the original part's regulatory requirements.

MP4462DN-LF-Z (Monolithic Power Systems Inc.): This substitute provides active product status with higher output current capability (4.6A versus 3A), offering additional design margin. The MP4462DN-LF-Z supports lower minimum input voltage (3.8V) and higher switching frequency capability (up to 4MHz), enabling more compact filter designs. Output voltage range (0.8V to 30V) matches the original part's minimum specification. RoHS3 compliance and REACH unaffected status are maintained.

Both substitutes are actively manufactured, ensuring long-term component availability and supply chain stability compared to the obsolete AOZ1242AI.

Frequently Asked Questions (FAQ)

Q: Can the L7986ATR directly replace the AOZ1242AI in existing designs? A: The L7986ATR is functionally equivalent for buck regulation applications requiring 3A output current in the 8-SOIC package. Both parts support positive adjustable output voltage regulation with compatible input voltage ranges (4.5V minimum). The L7986ATR's lower minimum output voltage (0.6V) and higher maximum input voltage (38V) provide extended operating range. PCB layout compatibility is maintained due to identical package footprint.

Q: What are the key differences between the L7986ATR and MP4462DN-LF-Z? A: The L7986ATR features a switching frequency range of 250kHz to 1MHz with maximum input voltage of 38V and lower minimum output voltage (0.6V). The MP4462DN-LF-Z offers higher output current (4.6A), lower minimum input voltage (3.8V), and higher switching frequency capability (up to 4MHz). Both maintain the 8-SOIC package and support 0.8V minimum output voltage specification of the original AOZ1242AI.

Q: Are package dimensions identical between all three parts? A: All three parts use the 8-SOIC (0.154", 3.90mm Width) package. The L7986ATR and MP4462DN-LF-Z include exposed pad variants, which may provide improved thermal performance compared to the original AOZ1242AI. PCB footprint compatibility is maintained across all three parts.

Q: Do the substitute parts meet the same compliance standards as the AOZ1242AI? A: Both substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the original AOZ1242AI. Moisture sensitivity levels differ: AOZ1242AI (MSL 1), L7986ATR (MSL 3), and MP4462DN-LF-Z (MSL 2). These differences affect storage and handling requirements but do not impact functional equivalence.

Q: Which substitute is recommended for new designs? A: Both L7986ATR and MP4462DN-LF-Z are active products suitable for new designs. Selection depends on specific application requirements: choose L7986ATR for extended temperature range and higher input voltage capability; choose MP4462DN-LF-Z for higher output current and lower input voltage support.