BA178M09FP-E2 Equivalent & Substitute Parts

Part Overview

The BA178M09FP-E2 is a linear voltage regulator IC manufactured by Rohm Semiconductor, designed to provide a fixed positive 9V output at 500mA. This is an active product in the Power Management (PMIC) category, supplied in TO-252-3 (DPAK) surface mount packaging. The device is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate regional availability constraints while maintaining electrical and mechanical compatibility.

Substiute Parts

BA178M09FP-E2

Rohm SemiconductorIn Stock: 30135BA178M09FP-E2 Datasheet

Current PartRFQ

UA78M09CKVURG3

Texas InstrumentsIn Stock: 1630UA78M09CKVURG3 Datasheet

DirectRFQ

L78M09ABDT-TR

STMicroelectronicsIn Stock: 26891L78M09ABDT-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BA178M09FP-E2 are qualified based on the following critical parameters:

• Fixed output voltage of 9V
• Output current capability of 500mA minimum
• Maximum input voltage of 26V or greater
• TO-252-3 (DPAK) package compatibility
• Surface mount technology
• ROHS3 compliance
• Active product status

The identified substitutes meet these core electrical and mechanical requirements, enabling direct replacement in circuit designs without modification to PCB layout or external component values.

Parameter Comparison

Engineering Selection Recommendations

All three parts are active products with ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for current design implementations.

The UA78M09CKVURG3 (Texas Instruments) offers enhanced PSRR performance at 80dB and integrated protection features (over current, over temperature, short circuit). However, the operating temperature range is limited to 0°C ~ 125°C, which excludes low-temperature applications below 0°C.

The L78M09ABDT-TR (STMicroelectronics) provides the highest maximum input voltage rating at 35V and supports the full temperature range of -40°C ~ 125°C. This part is suitable for applications requiring extended input voltage tolerance or full industrial temperature operation.

The BA178M09FP-E2 (Rohm) maintains the original design specifications with MSL 1 rating, providing unlimited moisture sensitivity tolerance for storage and handling.

Frequently Asked Questions (FAQ)

Q: Can UA78M09CKVURG3 replace BA178M09FP-E2 in all applications?

A: The UA78M09CKVURG3 is electrically compatible for most applications. However, the operating temperature range is restricted to 0°C ~ 125°C. If your application requires operation below 0°C, this substitute is not suitable. Additionally, the MSL rating is 3 (168 hours), requiring controlled storage conditions compared to the original MSL 1 rating.

Q: What are the advantages of L78M09ABDT-TR over the original BA178M09FP-E2?

A: The L78M09ABDT-TR supports a higher maximum input voltage of 35V versus 26V, and extends the operating temperature range to -40°C ~ 125°C. These characteristics make it suitable for applications with higher input voltage tolerance requirements or full industrial temperature operation.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the TO-252-3 (DPAK) package with identical pin configuration (2 leads + tab), enabling direct PCB replacement without layout modifications.

Q: Do the substitute parts require different external component values?

A: No. All parts are fixed 9V regulators with identical output voltage specification. External bypass and filtering capacitors remain unchanged from the original design.

Q: Which substitute offers the best noise performance?

A: The UA78M09CKVURG3 provides the highest PSRR at 80dB (120Hz), compared to 67dB for the BA178M09FP-E2 and 56dB for the L78M09ABDT-TR. This makes it preferable for noise-sensitive applications.