BA17812FP Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The BA17812FP is a linear voltage regulator IC manufactured by Rohm Semiconductor, designed to deliver a fixed 12V output at 1A maximum current in a TO-252-3 (DPAK) surface mount package. This device is classified as obsolete, making substitute parts necessary for new designs and production continuity. The BA17812FP operates across an input voltage range up to 27V with a maximum dropout voltage of 2V at full load, suitable for applications requiring stable 12V regulation from higher voltage sources.

Substiute Parts

BA17812FP

Rohm SemiconductorIn Stock: 2902BA17812FP Datasheet

Current PartRFQ

MC7812BDTG

onsemiIn Stock: 15956MC7812BDTG Datasheet

DirectRFQ

TL750M12CKVURG3

Texas InstrumentsIn Stock: 1578TL750M12CKVURG3 Datasheet

SimilarRFQ

TL750M12QKVURQ1

Texas InstrumentsIn Stock: 2573TL750M12QKVURQ1 Datasheet

SimilarRFQ

UA78M12CKVURG3

Texas InstrumentsIn Stock: 5529UA78M12CKVURG3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BA17812FP is determined by the following critical parameters:

• Fixed output voltage of 12V
• Surface mount TO-252-3 (DPAK) package compatibility
• Positive output configuration
• Single regulator topology
• RoHS3 compliance

Substitute parts must maintain the same output voltage and package form factor. Output current capacity, input voltage rating, dropout voltage, and operating temperature range may vary within acceptable design margins. Parts with equal or greater current capacity, input voltage tolerance, and temperature range provide direct substitution capability. Parts with reduced current capacity (750mA or 500mA) require design verification to confirm load compatibility.

Parameter Comparison

Engineering Selection Recommendations

MC7812BDTG (onsemi) provides the most direct substitution for BA17812FP applications. Both devices deliver 1A output current with identical 12V fixed output voltage and TO-252-3 package. The MC7812BDTG offers superior input voltage tolerance (35V maximum versus 27V) and extended operating temperature range (-40°C to 125°C), with active product status ensuring long-term availability. Both devices are RoHS3 compliant.

TL750M12CKVURG3 and TL750M12QKVURQ1 (Texas Instruments) are suitable for applications where output current requirements do not exceed 750mA. These devices feature improved dropout voltage performance (0.6V at 750mA) and comprehensive protection features including reverse polarity protection. TL750M12QKVURQ1 includes automotive-grade qualification (AEC-Q100) and extended temperature range (-40°C to 125°C), making it appropriate for automotive and industrial applications.

UA78M12CKVURG3 (Texas Instruments) is applicable only where output current does not exceed 500mA. This device provides the highest PSRR rating (80dB at 120Hz) among substitute options, beneficial for noise-sensitive applications. Operating temperature range is limited to 0°C to 125°C.

All substitute parts maintain RoHS3 compliance and identical package form factor. Selection should be based on specific load current requirements and operating temperature constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can MC7812BDTG directly replace BA17812FP without circuit modifications?

A: Yes. Both devices share identical output voltage (12V), output current rating (1A), and TO-252-3 package. Pin configuration and functional behavior are equivalent. The MC7812BDTG offers improved specifications (higher input voltage rating and extended temperature range), making it a direct drop-in replacement.

Q: What are the limitations of using TL750M12CKVURG3 or TL750M12QKVURQ1 as substitutes?

A: These Texas Instruments devices are rated for 750mA maximum output current, compared to the BA17812FP's 1A rating. Applications drawing sustained currents above 750mA will exceed the device's rated capacity. Both devices feature superior dropout voltage (0.6V at 750mA) and comprehensive protection features. TL750M12QKVURQ1 includes automotive qualification and full temperature range (-40°C to 125°C).

Q: Is UA78M12CKVURG3 suitable for high-current applications?

A: No. The UA78M12CKVURG3 is rated for 500mA maximum output current, making it unsuitable for applications requiring the BA17812FP's 1A capacity. This device is appropriate only for low-current 12V regulation circuits. It provides the highest PSRR rating (80dB) among available substitutes, beneficial for noise-sensitive analog circuits operating below 500mA.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts are available in TO-252-3 (DPAK) surface mount package, matching the BA17812FP form factor. Packaging variants differ by supplier: MC7812BDTG is supplied in Tube packaging, while Texas Instruments devices are supplied in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats. These packaging differences do not affect electrical performance or PCB assembly compatibility.

Q: What is the temperature operating range consideration for substitute selection?

A: The BA17812FP operates from -40°C to 85°C. MC7812BDTG and TL750M12QKVURQ1 extend this range to -40°C to 125°C, providing margin for high-temperature environments. TL750M12CKVURG3 and UA78M12CKVURG3 are limited to 0°C to 125°C, restricting use in applications requiring operation below 0°C. Application temperature requirements should guide substitute selection.

Q: Do substitute parts provide equivalent protection features?

A: The BA17812FP does not specify protection features. All substitute parts include over-temperature protection. MC7812BDTG adds short-circuit protection. Texas Instruments devices (TL750M12 series and UA78M12) provide comprehensive protection including over-current, over-temperature, over-voltage, and reverse-polarity protection, offering enhanced circuit reliability compared to the original device.