BA00AST Linear Voltage Regulator IC - Equivalent & Substitute Parts

Part Overview

The BA00AST is a linear voltage regulator IC manufactured by Rohm Semiconductor, designed for positive adjustable output applications with 1A current capacity in a TO-220-5 Full-Pak package. This device is classified as Not For New Designs, indicating it has reached end-of-life status. For new circuit designs or production runs requiring equivalent functionality, substitute parts with active product status are necessary to ensure long-term supply chain reliability and continued manufacturer support.

Substiute Parts

BA00AST

Rohm SemiconductorIn Stock: 10027BA00AST Datasheet

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TPS75801KC

Texas InstrumentsIn Stock: 3015TPS75801KC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BA00AST is determined by the following critical parameters:

• Output Configuration & Type: Must be Positive Adjustable to maintain circuit compatibility
• Package / Case: TO-220-5 form factor ensures mechanical and thermal compatibility with existing PCB layouts
• Voltage Range: Output voltage adjustability from minimum 1.225V to maximum output voltage must accommodate the original design specifications
• Current Rating: Output current capacity must meet or exceed the 1A requirement
• Control Features: Enable functionality must be present for circuit control logic
• Protection Features: Over Current and Over Temperature protection are mandatory for safe operation
• Compliance: RoHS3 compliance required for regulatory alignment

The TPS75801KC from Texas Instruments meets these substitution criteria with enhanced specifications in several areas, including higher output current capacity (3A), improved quiescent current performance (200 µA), and active product status for continued availability.

Parameter Comparison

Engineering Selection Recommendations

The TPS75801KC is a direct functional substitute for the BA00AST in new designs and production transitions. Selection rationale is based on the following factors:

Product Status: The TPS75801KC carries Active product status, ensuring manufacturer support, continued availability, and long-term supply chain stability. The BA00AST's Not For New Designs classification makes it unsuitable for new circuit development.

Regulatory Compliance: Both devices maintain ROHS3 compliance and EAR99 ECCN classification, satisfying regulatory requirements for equivalent component substitution.

Functional Compatibility: Both regulators provide positive adjustable output with identical minimum output voltage (1.225V), Enable control features, and Over Current/Over Temperature protection. The TO-220-5 package ensures direct mechanical compatibility with existing PCB designs.

Enhanced Performance: The TPS75801KC offers superior specifications including 3A output current (versus 1A), significantly lower quiescent current (200 µA versus 2.5 mA), higher PSRR (62dB versus 55dB), and extended operating temperature range (-40°C to 125°C versus -40°C to 85°C). Additional protection features including Reverse Polarity and Under Voltage Lockout (UVLO) provide enhanced circuit protection.

Frequently Asked Questions (FAQ)

Q: Can the TPS75801KC directly replace the BA00AST without PCB modifications?

A: Yes. Both devices use the TO-220-5 package with identical pinout compatibility. No PCB layout changes are required for mechanical substitution. Electrical functionality remains equivalent for applications operating within the BA00AST's original specifications.

Q: What are the key differences between these two regulators?

A: The primary differences are output current capacity (TPS75801KC: 3A versus BA00AST: 1A), quiescent current consumption (TPS75801KC: 200 µA versus BA00AST: 2.5 mA), and product lifecycle status (TPS75801KC: Active versus BA00AST: Not For New Designs). The TPS75801KC also includes additional protection features (Reverse Polarity and UVLO) and supports a wider operating temperature range.

Q: Is the TPS75801KC suitable for applications originally designed for the BA00AST?

A: Yes. The TPS75801KC meets or exceeds all critical parameters of the BA00AST, including output voltage range, adjustability, control features, and protection mechanisms. Applications designed for 1A output current will operate within the TPS75801KC's rated capacity.

Q: Are there input voltage limitations when substituting with the TPS75801KC?

A: Yes. The TPS75801KC has a maximum input voltage of 5.5V, compared to the BA00AST's 25V maximum. Applications requiring input voltages above 5.5V cannot use the TPS75801KC as a substitute. In such cases, alternative regulators with higher input voltage ratings must be evaluated.

Q: What is the impact of the lower quiescent current in the TPS75801KC?

A: The TPS75801KC's quiescent current of 200 µA (versus 2.5 mA in the BA00AST) results in significantly reduced standby power consumption. This improvement is beneficial for battery-powered applications and systems with strict power budget requirements.

Q: Are both devices RoHS compliant?

A: Yes. Both the BA00AST and TPS75801KC are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and distribution.