AOZ1252PI Equivalent & Substitute Parts

Part Overview

The AOZ1252PI is a buck switching regulator IC from Alpha & Omega Semiconductor Inc., designed for step-down voltage conversion with positive adjustable output. It delivers 2A output current across an input voltage range of 4.5V to 26V, with adjustable output from 0.6V to 26V. The device operates at 620kHz switching frequency and includes a synchronous rectifier, packaged in 8-SOIC with exposed pad.

The AOZ1252PI is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

AOZ1252PI

Alpha & Omega Semiconductor Inc.In Stock: 2117AOZ1252PI Datasheet

Current PartRFQ

L7980ATR

STMicroelectronicsIn Stock: 4262L7980ATR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AOZ1252PI is determined by the following critical parameters:

• Topology & Function: Buck switching regulator with step-down conversion
• Output Configuration: Positive adjustable output
• Electrical Specifications: Input voltage 4.5V minimum, output current 2A, adjustable output voltage starting at 0.6V
• Package Compatibility: 8-SOIC with exposed pad form factor
• Regulatory Compliance: ROHS3 compliance required

The L7980ATR from STMicroelectronics meets these core substitution criteria. Both devices share identical package geometry, matching input voltage minimums, equivalent output current ratings, and compatible output voltage adjustment ranges. Differences in switching frequency, maximum input voltage, and synchronous rectifier implementation do not preclude substitution when application requirements align with the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

The L7980ATR is an active product from a major semiconductor manufacturer, providing supply chain continuity for the obsolete AOZ1252PI. Both devices are ROHS3 compliant and share identical package specifications, enabling direct PCB layout compatibility.

The L7980ATR offers extended maximum input and output voltage ratings (28V versus 26V), providing additional design margin in applications approaching the upper voltage limits of the original part. The wider operating temperature range (-40°C to 150°C junction temperature versus -40°C to 85°C ambient) supports deployment in more demanding thermal environments.

The absence of a synchronous rectifier in the L7980ATR results in slightly lower efficiency compared to the AOZ1252PI in certain operating conditions. Applications sensitive to efficiency losses or thermal dissipation should evaluate this difference against specific load profiles and thermal constraints.

Frequently Asked Questions (FAQ)

Q: Can the L7980ATR be used as a direct replacement for the AOZ1252PI?

A: Yes, for applications within the specified electrical and thermal operating ranges. Both devices share identical package geometry, matching input voltage minimums, equivalent 2A output current, and compatible adjustable output voltage ranges from 0.6V. PCB layout modifications are not required.

Q: What are the key differences between these parts?

A: The L7980ATR has a higher maximum input voltage (28V vs. 26V), higher maximum output voltage (28V vs. 26V), wider operating temperature range (150°C vs. 85°C), and lacks a synchronous rectifier. The switching frequency range is also broader (250kHz–1MHz vs. fixed 620kHz).

Q: Does the absence of a synchronous rectifier affect performance?

A: The L7980ATR uses a standard rectifier diode instead of a synchronous rectifier. This results in higher conduction losses and reduced efficiency, particularly at lower output voltages or higher output currents. Thermal dissipation may increase. Evaluate application-specific efficiency requirements before substitution.

Q: Are both parts RoHS compliant?

A: Yes, both the AOZ1252PI and L7980ATR are ROHS3 compliant.

Q: What is the package compatibility between these parts?

A: Both devices use the 8-SOIC (0.154", 3.90mm Width) package with exposed pad. Pin-to-pin compatibility and PCB footprint alignment are identical, allowing direct substitution without layout redesign.

Q: Which part should be selected for new designs?

A: The L7980ATR is recommended for new designs due to its active product status, ensuring long-term availability and manufacturer support. The AOZ1252PI is obsolete and should be replaced in ongoing production.