LP2950CDT-3.0 Equivalent & Substitute Parts

Part Overview

The LP2950CDT-3.0 is a linear voltage regulator IC from onsemi, designed to deliver 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 procurement. The part operates across an input voltage range up to 30V with a maximum dropout voltage of 0.45V at full load, suitable for low-power applications requiring stable 3V regulation.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3V
Output Current	100mA
Input Voltage (Max)	30V
Dropout Voltage (Max)	0.45V @ 100mA
Quiescent Current	120 µA
Operating Temperature Range	-40°C to 125°C
Package Type	TO-252-3 (DPAK)
Protection Features	Over Current, Over Temperature

Substitute Part Grouping Explanation

Substitution for the LP2950CDT-3.0 is determined by the following critical parameters:

Fixed 3V output voltage
Surface-mount TO-252-3 package compatibility
Output current capability (minimum 100mA required)
Input voltage tolerance (maximum 30V)
Operating temperature range (-40°C to 125°C)
Protection against overcurrent and overtemperature conditions

Parts are grouped into two categories: parametric equivalents (matching all electrical specifications) and similar substitutes (meeting functional requirements with enhanced capabilities).

Parameter Comparison

Parameter	LP2950CDT-3.0 (Main)	LP2950CDT-3.0/NOPB	LP2950CDTX-3.0/NOPB	BA03CC0FP-E2
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Rohm Semiconductor
Output Voltage	3V	3V	3V	3V
Output Current	100mA	100mA	100mA	1A
Input Voltage (Max)	30V	30V	30V	25V
Dropout Voltage (Max)	0.45V @ 100mA	0.6V @ 100mA	0.6V @ 100mA	—
Quiescent Current	120 µA	120 µA	120 µA	2.5 mA
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package	TO-252-3 (DPAK)	TO-252-3 (DPAK)	TO-252-3 (DPAK)	TO-252-3 (DPAK)
Product Status	Obsolete	Active	Active	Active
RoHS Compliance	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Over Voltage

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement): LP2950CDT-3.0/NOPB from Texas Instruments is the primary parametric equivalent, offering identical electrical specifications with active product status and ROHS3 compliance. This part is available in Tube packaging and maintains the same 100mA output current and 0.6V dropout voltage specification.

Alternative Equivalent: LP2950CDTX-3.0/NOPB from Texas Instruments provides parametric equivalence with enhanced short-circuit protection and is available in Tape & Reel packaging. This variant is suitable for high-volume production environments.

Enhanced Substitute: BA03CC0FP-E2 from Rohm Semiconductor offers 10× higher output current (1A versus 100mA) while maintaining 3V fixed output and TO-252-3 package compatibility. This part is appropriate for applications requiring higher current capacity or future design margin. Note that input voltage tolerance is reduced to 25V maximum, and quiescent current is elevated to 2.5mA. This part includes over-voltage protection in addition to standard protection features.

All substitute parts maintain the required operating temperature range and surface-mount DPAK package format. Selection should prioritize active product status and ROHS3 compliance for new designs.

Frequently Asked Questions (FAQ)

Q: Can LP2950CDT-3.0/NOPB directly replace the obsolete LP2950CDT-3.0? A: Yes. LP2950CDT-3.0/NOPB from Texas Instruments is a parametric equivalent with identical output voltage (3V), output current (100mA), input voltage range (30V max), and operating temperature specifications. The primary difference is packaging format (Tube versus original) and active product status.

Q: What is the difference between LP2950CDT-3.0/NOPB and LP2950CDTX-3.0/NOPB? A: Both are parametric equivalents from Texas Instruments with identical electrical specifications. The primary distinction is packaging: LP2950CDT-3.0/NOPB is supplied in Tube, while LP2950CDTX-3.0/NOPB is supplied in Tape & Reel. LP2950CDTX-3.0/NOPB includes short-circuit protection as an additional protection feature.

Q: When should BA03CC0FP-E2 be selected instead of the LP2950 variants? A: BA03CC0FP-E2 should be selected when the application requires output current exceeding 100mA, up to 1A. This part maintains 3V fixed output and TO-252-3 package compatibility. However, verify that the maximum input voltage requirement does not exceed 25V, as this part has a lower input voltage rating than the LP2950 series.

Q: Are all substitute parts RoHS compliant? A: LP2950CDT-3.0/NOPB, LP2950CDTX-3.0/NOPB, and BA03CC0FP-E2 are all ROHS3 compliant. The original LP2950CDT-3.0 is RoHS non-compliant, making the active substitutes necessary for designs requiring RoHS certification.

Q: Do all parts use the same package footprint? A: Yes. All listed parts use the TO-252-3 (DPAK) package with identical pin configuration and PCB footprint compatibility, enabling direct board-level substitution without layout modifications.

Q: What is the impact of higher quiescent current in BA03CC0FP-E2? A: BA03CC0FP-E2 has a quiescent current of 2.5mA compared to 120µA in the LP2950 variants. This 20× increase affects standby power consumption and should be evaluated for battery-powered or low-power applications where quiescent current is a critical design parameter.

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