TCR3DM18,LF(SE Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The TCR3DM18,LF(SE is a linear voltage regulator IC manufactured by Toshiba Semiconductor and Storage, classified as a Power Management (PMIC) component. This device functions as a positive fixed output regulator with 300mA output current capability and 1.8V fixed output voltage. The part is currently in active product status and is supplied in Tape & Reel packaging.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set. Alternative models become necessary when primary part availability is limited, supply chain constraints exist, or design flexibility is required within the same functional specification.

Substiute Parts

TCR3DM18,LF(SE

Toshiba Semiconductor and StorageIn Stock: 10685TCR3DM18,LF(SE Datasheet

Current PartRFQ

TCR3DM18,RF(SE

Toshiba Semiconductor and StorageIn Stock: 3693TCR3DM18,RF(SE Datasheet

Parametric EquivalentRFQ

BU18UA3WNVX-TL

Rohm SemiconductorIn Stock: 6742BU18UA3WNVX-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TCR3DM18,LF(SE are identified based on strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Output Configuration: Positive
• Output Type: Fixed
• Voltage - Output (Min/Fixed): 1.8V
• Voltage - Input (Max): 5.5V
• Current - Output: 300mA
• Control Features: Enable
• Protection Features: Over Current, Over Temperature
• Operating Temperature Range: -40°C to 85°C

Mechanical Equivalence Criteria:

• Mounting Type: Surface Mount
• Package / Case: 4-UDFN Exposed Pad
• Moisture Sensitivity Level: 1 (Unlimited)

Compliance Equivalence Criteria:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Substitute parts must satisfy all electrical, mechanical, and compliance parameters listed above. Voltage dropout characteristics and quiescent current specifications are provided for reference but do not disqualify substitution when other parameters align.

Parameter Comparison

Engineering Selection Recommendations

TCR3DM18,RF(SE (Toshiba Semiconductor and Storage)

This part is a direct parametric equivalent to the TCR3DM18,LF(SE. Both devices are manufactured by Toshiba Semiconductor and Storage and maintain identical electrical specifications, mechanical packaging, and compliance certifications. The TCR3DM18,RF(SE is currently in active product status. Selection between these two Toshiba variants is based on inventory availability and supply chain considerations, as no functional differentiation exists between the parts.

BU18UA3WNVX-TL (Rohm Semiconductor)

This part meets all critical electrical and mechanical substitution criteria. The BU18UA3WNVX-TL maintains equivalent output configuration, output type, voltage specifications, current rating, control features, and protection features. Operating temperature range and compliance certifications are identical. The device is supplied in a 4-UDFN Exposed Pad package with MSL 1 rating.

The BU18UA3WNVX-TL exhibits superior voltage dropout performance (0.32V @ 300mA versus 0.38V @ 300mA) and provides specified quiescent current (90 µA) and PSRR (70dB at 1kHz) characteristics. However, this part carries a product status designation of "Not For New Designs," indicating that Rohm Semiconductor has discontinued active development and support for this device. Selection of the BU18UA3WNVX-TL is appropriate only when existing inventory is available and long-term supply continuity is not required.

Frequently Asked Questions (FAQ)

Q: What determines whether a part can substitute for the TCR3DM18,LF(SE?

A: Substitution is determined by equivalence across three categories: electrical parameters (output configuration, voltage specifications, current rating, control and protection features, operating temperature), mechanical parameters (surface mount type, 4-UDFN Exposed Pad package, MSL 1 rating), and compliance certifications (ROHS3 Compliant, REACH Unaffected status).

Q: Are the TCR3DM18,LF(SE and TCR3DM18,RF(SE interchangeable?

A: Yes. Both parts are manufactured by Toshiba Semiconductor and Storage and maintain identical electrical specifications, mechanical packaging, and compliance status. Both are in active product status. Selection is based on inventory availability.

Q: Can the BU18UA3WNVX-TL be used as a substitute?

A: The BU18UA3WNVX-TL meets all specified electrical and mechanical substitution criteria. However, this Rohm Semiconductor device is designated "Not For New Designs," indicating discontinued active support. Use of this part is limited to applications where existing inventory is available and long-term supply continuity is not a requirement.

Q: What is the significance of the "Not For New Designs" status for the BU18UA3WNVX-TL?

A: This designation indicates that the manufacturer has discontinued active development and support for the device. While the part remains functionally equivalent and available from existing inventory, it is not recommended for designs requiring extended production runs or long-term supply assurance.

Q: Are there package compatibility concerns between substitute parts?

A: All three parts utilize the 4-UDFN Exposed Pad package with identical mechanical specifications. No package compatibility issues exist. Supplier device package designations (4-DFN (1x1) for Toshiba parts, SSON004X1010 for Rohm) refer to internal supplier nomenclature and do not affect physical compatibility.

Q: What compliance certifications apply to all substitute parts?

A: All parts are ROHS3 Compliant and REACH Unaffected. Moisture Sensitivity Level is 1 (Unlimited) for all devices, indicating no moisture sensitivity restrictions during storage or handling.

Q: How do voltage dropout specifications affect substitution?

A: The BU18UA3WNVX-TL exhibits lower voltage dropout (0.32V @ 300mA) compared to the Toshiba variants (0.38V @ 300mA). This represents improved efficiency performance but does not disqualify substitution. Selection based on dropout performance is appropriate when power efficiency is a design priority.