AOZ1017AI Equivalent & Substitute Parts

Part Overview

The AOZ1017AI is a buck switching regulator IC from Alpha & Omega Semiconductor Inc., designed for step-down voltage conversion with positive adjustable output. It delivers 3A output current across a wide input voltage range of 4.5V to 16V, with adjustable output from 0.8V to 16V. The device operates at 500kHz switching frequency in an 8-SOIC surface mount package.

The AOZ1017AI 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

AOZ1017AI

Alpha & Omega Semiconductor Inc.In Stock: 10701AOZ1017AI Datasheet

Current PartRFQ

ST1S10PHR

STMicroelectronicsIn Stock: 23949ST1S10PHR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AOZ1017AI is determined by alignment across the following critical parameters:

Functional Requirements:

• Topology: Buck (step-down) switching regulator
• Output Configuration: Positive adjustable
• Number of Outputs: Single output

Electrical Specifications:

• Output Voltage Range: Minimum 0.8V, maximum at least 16V
• Output Current: 3A capability
• Input Voltage Range: Must accommodate 4.5V to 16V minimum
• Package Compatibility: 8-SOIC form factor

Compliance & Environmental:

• RoHS3 compliance
• Moisture Sensitivity Level 1
• Operating temperature range support for -40°C to 85°C minimum

The ST1S10PHR meets these substitution criteria while offering enhanced specifications in certain areas, including wider input voltage range, higher maximum output voltage, higher switching frequency, and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The ST1S10PHR is a qualified substitute for the obsolete AOZ1017AI based on the following engineering criteria:

Compliance Alignment: Both devices maintain ROHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compatibility with existing designs.

Functional Equivalence: Both regulators provide identical buck topology with positive adjustable output configuration, single output, and 3A current capability. The core switching regulator function is preserved.

Electrical Compatibility: The ST1S10PHR accommodates the AOZ1017AI's specified input voltage range (4.5V to 16V) and output voltage range (0.8V to 16V). The substitute device exceeds minimum requirements in input voltage range (2.5V minimum) and output voltage maximum (16.2V).

Package Compatibility: Both devices use 8-SOIC surface mount packaging with identical 0.154" (3.90mm) width. The ST1S10PHR includes an exposed pad for enhanced thermal performance, which is compatible with existing PCB layouts designed for the standard 8-SOIC footprint.

Active Product Status: The ST1S10PHR is an active product from STMicroelectronics, ensuring long-term availability, ongoing technical support, and supply chain reliability compared to the obsolete AOZ1017AI.

Frequently Asked Questions (FAQ)

Q: Can the ST1S10PHR directly replace the AOZ1017AI without PCB modifications?

A: Yes. Both devices use the 8-SOIC package with identical 0.154" (3.90mm) width. The ST1S10PHR's exposed pad is compatible with standard 8-SOIC footprints. No PCB layout changes are required for pin-to-pin substitution.

Q: What are the key electrical differences between these devices?

A: The ST1S10PHR offers wider input voltage range (2.5V to 18V versus 4.5V to 16V), slightly higher output voltage maximum (16.2V versus 16V), higher switching frequency (900kHz versus 500kHz), and includes a synchronous rectifier. All differences are backward-compatible with AOZ1017AI specifications.

Q: Does the higher switching frequency of the ST1S10PHR affect circuit design?

A: The 900kHz switching frequency of the ST1S10PHR versus 500kHz of the AOZ1017AI may require component value adjustments for output filtering and compensation networks. Refer to the ST1S10PHR datasheet for recommended external component values.

Q: Is the exposed pad on the ST1S10PHR mandatory for proper operation?

A: The exposed pad on the ST1S10PHR provides improved thermal performance but is not mandatory for basic operation. Existing PCB designs without exposed pad connections will function correctly; however, thermal performance may be optimized by connecting the exposed pad to ground.

Q: Are there temperature range considerations for substitution?

A: The ST1S10PHR supports -40°C to 125°C (junction temperature) versus -40°C to 85°C (ambient temperature) for the AOZ1017AI. The ST1S10PHR is suitable for applications requiring extended temperature operation and provides additional thermal margin in standard temperature range applications.

Q: What is the impact of the synchronous rectifier in the ST1S10PHR?

A: The ST1S10PHR's integrated synchronous rectifier improves efficiency by reducing conduction losses compared to the AOZ1017AI's non-synchronous design. This enhancement is transparent to circuit operation and requires no design modifications.