BA12FP-E2 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The BA12FP-E2 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 surface mount package. This device is classified as not for new designs, making identification of active equivalent and substitute parts essential for ongoing production support, maintenance applications, and design transitions.

The BA12FP-E2 provides positive fixed output regulation with integrated protection features including over-current, over-temperature, and over-voltage protection. The regulator operates across an input voltage range up to 25V and maintains a quiescent current of 2.5mA with a PSRR of 55dB at 120Hz.

Key Parameters

Parameter	BA12FP-E2 (Rohm)
Output Voltage (Fixed)	12V
Output Current	1A
Input Voltage (Max)	25V
Quiescent Current	2.5mA
PSRR @ 120Hz	55dB
Protection Features	Over Current, Over Temperature, Over Voltage
Operating Temperature Range	-40°C to 85°C
Package	TO-252-3 (DPAK)
Product Status	Not For New Designs
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the BA12FP-E2 is determined by the following critical parameters:

Fixed output voltage of 12V
Surface mount TO-252-3 package compatibility
Positive output configuration
Single regulator output
Over-current and over-temperature protection
RoHS3 compliance

The substitute parts identified maintain the 12V fixed output voltage and TO-252-3 package form factor. However, output current ratings differ across the substitute options, ranging from 500mA to 750mA compared to the original 1A specification. Selection depends on application current requirements and thermal management considerations.

All substitute parts are manufactured by Texas Instruments and maintain active product status, supporting long-term availability for production applications.

Parameter Comparison

Parameter	BA12FP-E2 (Rohm)	TL750M12CKVURG3 (TI)	TL750M12QKVURQ1 (TI)	UA78M12CKVURG3 (TI)
Output Voltage (Fixed)	12V	12V	12V	12V
Output Current	1A	750mA	750mA	500mA
Input Voltage (Max)	25V	26V	26V	30V
Voltage Dropout (Max)	Not specified	0.6V @ 750mA	0.6V @ 750mA	2V @ 350mA
PSRR @ 120Hz	55dB	55dB	55dB	80dB
Protection Features	Over Current, Over Temperature, Over Voltage	Over Current, Over Temperature, Over Voltage, Reverse Polarity	Over Current, Over Temperature, Over Voltage, Reverse Polarity	Over Current, Over Temperature, Short Circuit
Operating Temperature Range	-40°C to 85°C	0°C to 125°C	-40°C to 125°C	0°C to 125°C
Package	TO-252-3	TO-252-3	TO-252-3	TO-252-3
Product Status	Not For New Designs	Active	Active	Active
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

TL750M12CKVURG3 is suitable for applications requiring 750mA output current with standard industrial temperature range (0°C to 125°C). This part offers active product status with enhanced protection including reverse polarity protection and maintains compatibility with the TO-252-3 package footprint.

TL750M12QKVURQ1 extends the lower operating temperature limit to -40°C, matching the BA12FP-E2 temperature range, and includes AEC-Q100 automotive qualification. This variant is appropriate for applications requiring extended temperature performance and automotive-grade reliability. Output current is rated at 750mA.

UA78M12CKVURG3 provides the lowest output current specification at 500mA but offers the highest maximum input voltage rating (30V) and superior PSRR performance (80dB). This part is suitable for applications with lower current demands and higher input voltage tolerance requirements.

All three substitute parts maintain RoHS3 compliance and active product status, ensuring long-term supply chain viability compared to the BA12FP-E2 not-for-new-designs status.

Frequently Asked Questions (FAQ)

Q: Can the TL750M12 series directly replace the BA12FP-E2 in all applications?

A: Direct replacement depends on application current requirements. The BA12FP-E2 is rated for 1A output, while TL750M12 variants are rated for 750mA. Applications drawing less than 750mA are compatible. Applications requiring the full 1A specification require design evaluation or alternative solutions.

Q: What is the difference between TL750M12CKVURG3 and TL750M12QKVURQ1?

A: Both parts have identical electrical specifications and 750mA output current. The primary difference is operating temperature range: TL750M12CKVURG3 operates from 0°C to 125°C, while TL750M12QKVURQ1 operates from -40°C to 125°C and includes AEC-Q100 automotive qualification. Select TL750M12QKVURQ1 for extended low-temperature applications or automotive requirements.

Q: Why does UA78M12CKVURG3 have lower output current than the other substitutes?

A: The UA78M12CKVURG3 is rated for 500mA output current. This part is suitable only for applications with current demands below 500mA. However, it provides superior PSRR (80dB versus 55dB) and higher maximum input voltage tolerance (30V versus 26V).

Q: Are all substitute parts in the same TO-252-3 package?

A: Yes, all substitute parts use the TO-252-3 (DPAK with 2 leads plus tab) package, ensuring PCB footprint compatibility with the BA12FP-E2.

Q: What protection features differ between the BA12FP-E2 and substitutes?

A: The BA12FP-E2 includes over-current, over-temperature, and over-voltage protection. TL750M12 variants add reverse polarity protection. UA78M12CKVURG3 includes over-current, over-temperature, and short-circuit protection. All variants provide thermal protection.

Q: Is the BA12FP-E2 still available for purchase?

A: The BA12FP-E2 is classified as not for new designs. While inventory may be available (207,996 pcs reported in stock), long-term supply is not guaranteed. Transition to active substitute parts is recommended for new production and ongoing support.

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