BA033ST Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The BA033ST is an active linear voltage regulator IC manufactured by Rohm Semiconductor, designed for positive fixed 3.3V output applications requiring up to 1A current capacity. This TO-220-5 package component provides regulated power distribution in embedded systems, industrial controllers, and consumer electronics. The part is actively produced and widely stocked, with 6412 units available in inventory. Substitute parts are identified when equivalent electrical performance, package compatibility, and regulatory compliance can be maintained while meeting specific application requirements.

Substiute Parts

BA033ST

Rohm SemiconductorIn Stock: 6445BA033ST Datasheet

Current PartRFQ

MIC29151-3.3WT

Microchip TechnologyIn Stock: 8069MIC29151-3.3WT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BA033ST are qualified based on the following critical parameters:

• Fixed output voltage of 3.3V
• TO-220-5 package configuration for direct pin-compatible mounting
• Through-hole mounting type
• Output current capability of 1A or greater
• Maximum input voltage of 25V or higher
• Active product status with current manufacturing
• ROHS3 compliance and REACH unaffected status
• Enable control feature functionality
• Operating temperature range encompassing -40°C minimum

The MIC29151-3.3WT meets all substitution criteria with enhanced specifications in output current (1.5A), maximum input voltage (26V), and operating temperature range (-40°C to 125°C).

Parameter Comparison

Engineering Selection Recommendations

The MIC29151-3.3WT qualifies as a direct substitute for the BA033ST based on electrical and mechanical compatibility. Both parts maintain ROHS3 compliance and active production status. The MIC29151-3.3WT provides enhanced performance specifications: 50% higher output current capacity (1.5A versus 1A), 1V higher maximum input voltage tolerance (26V versus 25V), and extended maximum operating temperature (125°C versus 85°C). These enhanced specifications ensure the substitute part operates within or exceeds the electrical envelope of the original part. Pin configuration and TO-220-5 package geometry are identical, enabling direct PCB mounting without layout modification. Selection between these parts depends on application current requirements, thermal environment, and supply voltage characteristics.

Frequently Asked Questions (FAQ)

Q: Can the MIC29151-3.3WT replace the BA033ST in existing designs?

A: Yes. Both parts provide identical 3.3V fixed output voltage, use the same TO-220-5 package, and feature identical pin configuration. The MIC29151-3.3WT exceeds the BA033ST specifications in output current, input voltage rating, and operating temperature range, making it electrically and mechanically compatible for direct substitution.

Q: What are the key differences between these parts?

A: The MIC29151-3.3WT provides 1.5A output current versus the BA033ST's 1A, accepts up to 26V input versus 25V, and operates to 125°C versus 85°C maximum. The MIC29151-3.3WT also specifies 0.6V maximum dropout voltage at 1.5A. These represent performance enhancements rather than limitations.

Q: Are both parts available in the same package?

A: Yes. Both the BA033ST and MIC29151-3.3WT use the TO-220-5 package with identical pin assignments, enabling direct PCB mounting without modification.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification. Both maintain MSL 1 (Unlimited) moisture sensitivity level.

Q: Which part should be selected for new designs?

A: Selection depends on application requirements. For applications requiring only 1A output current and operating below 85°C, either part is suitable. For applications approaching 1A output current, operating above 85°C, or requiring higher input voltage tolerance, the MIC29151-3.3WT is the preferred choice due to its enhanced specifications.