LP2950CDT-3.0RK Equivalent & Substitute Parts

Part Overview

The LP2950CDT-3.0RK is a linear voltage regulator IC from onsemi, delivering a fixed 3V output at 100mA in a surface-mount DPAK package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part provides positive fixed output configuration with integrated over-current and over-temperature protection across an operating range of -40°C to 125°C.

Substiute Parts

LP2950CDT-3.0RK

onsemiIn Stock: 816LP2950CDT-3.0RK Datasheet

Current PartRFQ

LP2950CDT-3.0RKG

onsemiIn Stock: 3122LP2950CDT-3.0RKG Datasheet

DirectRFQ

BA03CC0FP-E2

Rohm SemiconductorIn Stock: 2333BA03CC0FP-E2 Datasheet

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LP2950CDT-3.0/NOPB

Texas InstrumentsIn Stock: 1562LP2950CDT-3.0/NOPB Datasheet

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LP2950CDTX-3.0/NOPB

Texas InstrumentsIn Stock: 1198LP2950CDTX-3.0/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2950CDT-3.0RK is determined by the following critical parameters: fixed 3V output voltage, 100mA output current capability, TO-252-3 DPAK package compatibility, surface-mount configuration, and operating temperature range of -40°C to 125°C. All substitute parts must maintain these electrical and mechanical specifications to ensure direct functional replacement without circuit redesign.

The substitute parts are grouped into two categories:

Direct Equivalent (Packaging Variant): LP2950CDT-3.0RKG differs only in packaging format (Tape & Reel versus individual packaging) while maintaining identical electrical specifications and the same onsemi manufacturer base.

Cross-Manufacturer Equivalents: BA03CC0FP-E2 (Rohm Semiconductor), LP2950CDT-3.0/NOPB (Texas Instruments), and LP2950CDTX-3.0/NOPB (Texas Instruments) provide functional equivalence with identical output voltage and current ratings, matching package type, and compatible operating temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

LP2950CDT-3.0RKG is the primary direct replacement for the obsolete LP2950CDT-3.0RK. Both parts share identical electrical specifications and are manufactured by onsemi. The LP2950CDT-3.0RKG is currently in active production status with ROHS3 compliance, making it the preferred choice for new designs and production continuity.

LP2950CDT-3.0/NOPB and LP2950CDTX-3.0/NOPB (Texas Instruments) provide functionally equivalent alternatives with matching 3V output, 100mA current rating, and TO-252-3 package. Both are active products with ROHS3 compliance. The primary difference is packaging format: LP2950CDT-3.0/NOPB is supplied in Tube packaging, while LP2950CDTX-3.0/NOPB is supplied in Tape & Reel format. The voltage dropout specification is slightly higher at 0.6V compared to the original 0.45V, and quiescent current remains equivalent at 120 µA.

BA03CC0FP-E2 (Rohm Semiconductor) offers higher output current capability at 1A, exceeding the 100mA requirement of the original part. This part is suitable for applications requiring additional current headroom. The input voltage maximum is 25V, which is lower than the original 30V specification. Quiescent current is higher at 2.5 mA. This part includes over-voltage protection in addition to over-current and over-temperature protection.

All substitute parts maintain the same operating temperature range (-40°C to 125°C) and surface-mount DPAK package configuration, ensuring mechanical and thermal compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can LP2950CDT-3.0RKG be used as a direct replacement for LP2950CDT-3.0RK?

A: Yes. LP2950CDT-3.0RKG is a direct electrical and mechanical equivalent. The only difference is packaging format (Tape & Reel versus individual packaging). Both parts have identical output voltage (3V), output current (100mA), voltage dropout (0.45V @ 100mA), and operating temperature range (-40°C to 125°C).

Q: What are the key differences between the Texas Instruments LP2950 variants and the onsemi original?

A: LP2950CDT-3.0/NOPB and LP2950CDTX-3.0/NOPB maintain the same 3V output and 100mA current rating. The voltage dropout is slightly higher at 0.6V compared to 0.45V. Packaging differs: LP2950CDT-3.0/NOPB uses Tube packaging while LP2950CDTX-3.0/NOPB uses Tape & Reel. Both are active products with ROHS3 compliance.

Q: Is BA03CC0FP-E2 a suitable replacement?

A: BA03CC0FP-E2 provides functional equivalence with 3V fixed output and TO-252-3 package compatibility. However, it delivers 1A output current versus the original 100mA specification, and the input voltage maximum is 25V instead of 30V. This part is suitable only if the application can operate within these revised electrical parameters.

Q: Are all substitute parts available in the same DPAK package?

A: Yes. All substitute parts use the TO-252-3 DPAK (2 Leads + Tab) package configuration, ensuring identical PCB footprint and thermal characteristics. Packaging format (Tube, Tape & Reel, or individual) does not affect the component package itself.

Q: What compliance certifications apply to the substitute parts?

A: LP2950CDT-3.0RKG, LP2950CDT-3.0/NOPB, LP2950CDTX-3.0/NOPB, and BA03CC0FP-E2 are all ROHS3 compliant. The original LP2950CDT-3.0RK is RoHS non-compliant. All parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: Which substitute part has the lowest quiescent current?

A: LP2950CDT-3.0RK, LP2950CDT-3.0RKG, LP2950CDT-3.0/NOPB, and LP2950CDTX-3.0/NOPB all have identical quiescent current of 120 µA. BA03CC0FP-E2 has higher quiescent current at 2.5 mA.