L78MS05JSMP-AN-DLM-E Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The L78MS05JSMP-AN-DLM-E is a linear voltage regulator IC manufactured by onsemi, designed to provide a fixed positive 5V output at 500mA. This Surface Mount Power Management (PMIC) component operates across an input voltage range up to 20V with a maximum dropout voltage of 2V at 350mA. The device includes over-current and over-temperature protection features and operates reliably across -40°C to 85°C.

This part is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this regulator.

Substiute Parts

L78MS05JSMP-AN-DLM-E

onsemiIn Stock: 936L78MS05JSMP-AN-DLM-E Datasheet

Current PartRFQ

BA178M05FP-E2

Rohm SemiconductorIn Stock: 63911BA178M05FP-E2 Datasheet

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BA78M05FP-E2

Rohm SemiconductorIn Stock: 84466BA78M05FP-E2 Datasheet

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L78M05ABDT-TR

STMicroelectronicsIn Stock: 505185L78M05ABDT-TR Datasheet

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LM340SX-5.0/NOPB

Texas InstrumentsIn Stock: 19612LM340SX-5.0/NOPB Datasheet

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NJM2836DL3-05-TE1

Nisshinbo Micro Devices Inc.In Stock: 1020NJM2836DL3-05-TE1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L78MS05JSMP-AN-DLM-E are selected based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Fixed positive 5V output voltage
• Output current capability of 500mA or greater
• Input voltage rating of 18V or higher
• Surface mount packaging (DPAK or TO-252 variants)
• Operating temperature range of -40°C to 85°C or wider
• Over-current and over-temperature protection features
• ROHS3 compliance

Substitution Categories:

Direct Functional Equivalents (500mA Output Current): Parts meeting all primary criteria with 500mA output current rating, including BA178M05FP-E2, BA78M05FP-E2, L78M05ABDT-TR, and NJM2836DL3-05-TE1. These parts maintain identical output current specifications and are suitable for direct replacement in existing designs.

Higher Current Capability Substitute (1.5A Output Current): LM340SX-5.0/NOPB provides increased output current capacity at 1.5A, suitable for applications requiring higher current delivery while maintaining 5V fixed output and compatible package form factors.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (500mA Applications):

BA78M05FP-E2 and BA178M05FP-E2 from Rohm Semiconductor are active production parts with ROHS3 compliance and identical 5V/500mA specifications. Both maintain the required operating temperature range and include over-current and over-temperature protection. BA78M05FP-E2 offers higher input voltage rating (25V vs 20V) and improved PSRR performance (78dB vs 63dB).

L78M05ABDT-TR from STMicroelectronics provides extended input voltage capability (35V) and expanded operating temperature range (-40°C to 125°C). This part includes short-circuit protection in addition to over-current and over-temperature protection, offering enhanced reliability for demanding applications.

NJM2836DL3-05-TE1 from Nisshinbo Micro Devices maintains the TO-252-6 package footprint identical to the original part, preserving PCB layout compatibility. This part features exceptionally low dropout voltage (0.18V @ 300mA) and includes enable control functionality, though input voltage rating is limited to 18V.

For Higher Current Applications (1.5A Requirement):

LM340SX-5.0/NOPB from Texas Instruments is suitable when increased output current capacity is required. This part provides 1.5A output current with 35V input voltage rating and ROHS3 compliance. The TO-263 package differs from the original TO-252-6, requiring PCB layout modification. Operating temperature range is 0°C to 125°C, which may not satisfy applications requiring -40°C minimum operation.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and EAR99 export classification consistent with the original part. Moisture sensitivity level remains at MSL 1 (Unlimited) across all alternatives, ensuring equivalent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can BA78M05FP-E2 directly replace L78MS05JSMP-AN-DLM-E on the PCB?

A: BA78M05FP-E2 provides functional equivalence for 5V/500mA applications. However, the package differs: BA78M05FP-E2 uses TO-252-3 (2 Leads + Tab) while the original uses TO-252-6 (5 Leads + Tab). PCB footprint modification is required. Electrical performance is compatible.

Q: What is the key difference between BA78M05FP-E2 and BA178M05FP-E2?

A: Both are Rohm Semiconductor 5V/500mA regulators with identical electrical specifications and TO-252-3 packaging. BA78M05FP-E2 includes over-current and over-temperature protection, while BA178M05FP-E2 does not specify protection features. BA78M05FP-E2 is the preferred choice for applications requiring comprehensive protection.

Q: Why does NJM2836DL3-05-TE1 have lower input voltage rating (18V) compared to other substitutes?

A: NJM2836DL3-05-TE1 is designed for lower input voltage applications. This part is suitable only when input voltage does not exceed 18V. For applications requiring higher input voltage tolerance, L78M05ABDT-TR (35V) or BA78M05FP-E2 (25V) are more appropriate.

Q: Is LM340SX-5.0/NOPB suitable for all L78MS05JSMP-AN-DLM-E applications?

A: LM340SX-5.0/NOPB is suitable only for applications requiring 1.5A output current. The TO-263 package requires PCB redesign compared to the original TO-252-6. Additionally, the minimum operating temperature is 0°C, which may not satisfy applications requiring -40°C operation. Verify application requirements before selection.

Q: What are the substitution criteria for 5V linear regulators in this category?

A: Substitution requires matching: fixed 5V output voltage, minimum 500mA output current capability, input voltage rating of 18V or higher, surface mount DPAK or TO-252 packaging, operating temperature range of -40°C to 85°C or wider, and ROHS3 compliance. Protection features (over-current, over-temperature) should be present in the substitute part.

Q: Can I use a substitute part with higher input voltage rating than the original?

A: Yes. Higher input voltage ratings provide design margin and are compatible with applications designed for the original 20V maximum. Parts rated for 25V or 35V input voltage are suitable replacements and offer improved robustness.

Q: What is the impact of different package types on PCB compatibility?

A: The original L78MS05JSMP-AN-DLM-E uses TO-252-6 (5 Leads + Tab). Most substitutes use TO-252-3 (2 Leads + Tab) or TO-263 (3 Leads + Tab). Different lead counts require PCB footprint modification. NJM2836DL3-05-TE1 maintains TO-252-6 packaging, preserving PCB compatibility without layout changes.