AOZ1050PI Equivalent & Substitute Parts

Part Overview

The AOZ1050PI is a buck switching regulator IC from Alpha & Omega Semiconductor Inc., designed for positive adjustable output applications. This device delivers 2A output current with an adjustable output voltage range from 0.8V to 15.3V, operating from a 4.5V to 18V input supply. The part is housed in an 8-SOIC package with exposed pad and features synchronous rectification at 500kHz switching frequency.

The AOZ1050PI is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this regulator.

Key Parameters

Parameter	Value
Manufacturer	Alpha & Omega Semiconductor Inc.
Category	Power Management (PMIC)
Function	Step-Down (Buck)
Output Configuration	Positive Adjustable
Input Voltage Range	4.5V to 18V
Output Voltage Range	0.8V to 15.3V
Output Current	2A
Switching Frequency	500kHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C to 85°C
Package Type	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AOZ1050PI is determined by the following core electrical and mechanical parameters:

Electrical Compatibility Criteria:

Input voltage range must encompass or match 4.5V to 18V
Output voltage adjustability must support minimum 0.8V and accommodate the application's maximum voltage requirement
Output current capability must meet or exceed 2A
Topology must be buck (step-down) with positive adjustable output
Synchronous rectification capability must be present

Mechanical Compatibility Criteria:

Surface mount mounting type
Package footprint must be compatible with the application's PCB layout

Regulatory & Compliance Criteria:

RoHS3 compliance required
Operating temperature range should support the application environment

The AOZ6689CI qualifies as a manufacturer-recommended substitute based on these parameters.

Parameter Comparison

Parameter	AOZ1050PI (Main Part)	AOZ6689CI (Substitute)
Manufacturer	Alpha & Omega Semiconductor Inc.	Alpha & Omega Semiconductor Inc.
Category	Power Management (PMIC)	Power Management (PMIC)
Function	Step-Down	Step-Down
Output Configuration	Positive Adjustable	Positive Adjustable
Input Voltage (Min)	4.5V	4.5V
Input Voltage (Max)	18V	18V
Output Voltage (Min)	0.8V	0.8V
Output Voltage (Max)	15.3V	6V
Output Current	2A	3A
Switching Frequency	500kHz	750kHz
Synchronous Rectifier	Yes	Yes
Operating Temperature	-40°C to 85°C	-40°C to 125°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width) Exposed Pad	SOT-23-6 Thin, TSOT-23-6
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	2 (1 Year)	1 (Unlimited)

Engineering Selection Recommendations

The AOZ6689CI is the manufacturer-recommended substitute for the obsolete AOZ1050PI. Both devices are manufactured by Alpha & Omega Semiconductor Inc. and maintain identical input voltage specifications (4.5V to 18V) and minimum output voltage (0.8V). Both feature synchronous rectification and are ROHS3 compliant.

The AOZ6689CI offers improvements over the AOZ1050PI: higher output current capability (3A versus 2A), extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), higher switching frequency (750kHz versus 500kHz), and active product status ensuring ongoing availability and support.

The primary design consideration is the reduced maximum output voltage of the AOZ6689CI (6V versus 15.3V). Applications requiring output voltages exceeding 6V cannot use this substitute without circuit redesign. For applications operating within the 0.8V to 6V output range, the AOZ6689CI is a direct functional replacement with enhanced performance characteristics.

The AOZ6689CI uses a different package (SOT-23-6 versus 8-SOIC), requiring PCB layout modification. The improved moisture sensitivity level (MSL 1 versus MSL 2) provides extended shelf life and reduced handling constraints.

Frequently Asked Questions (FAQ)

Q: Can the AOZ6689CI replace the AOZ1050PI in all applications?

A: The AOZ6689CI is functionally compatible only for applications where the output voltage requirement does not exceed 6V. The AOZ1050PI supports output voltages up to 15.3V, while the AOZ6689CI maximum is 6V. If your application requires higher output voltages, the AOZ6689CI is not suitable without circuit redesign.

Q: What are the package differences between these parts?

A: The AOZ1050PI uses an 8-SOIC (0.154", 3.90mm Width) package with exposed pad. The AOZ6689CI uses a SOT-23-6 thin package (TSOT-23-6). These packages have different footprints and pin configurations, requiring PCB layout changes for substitution.

Q: Does the AOZ6689CI offer any performance advantages?

A: Yes. The AOZ6689CI provides 3A output current compared to 2A, operates at a higher switching frequency (750kHz versus 500kHz), supports an extended temperature range (-40°C to 125°C versus -40°C to 85°C), and has improved moisture sensitivity (MSL 1 unlimited shelf life versus MSL 2 one-year shelf life).

Q: Are both parts RoHS compliant?

A: Yes, both the AOZ1050PI and AOZ6689CI are ROHS3 compliant and REACH unaffected.

Q: Why is the AOZ1050PI obsolete?

A: The AOZ1050PI is classified as obsolete by the manufacturer. The AOZ6689CI represents the active product line continuation with enhanced specifications and improved availability.

Q: What input voltage range do both regulators support?

A: Both the AOZ1050PI and AOZ6689CI accept input voltages from 4.5V to 18V, maintaining identical input specifications.

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