LP2950CDT-5.0 Equivalent & Substitute Parts

Part Overview

The LP2950CDT-5.0 is a linear voltage regulator IC from onsemi, delivering a fixed 5V output at 100mA in a DPAK surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The LP2950 series provides micropower regulation with integrated over-current and over-temperature protection, suitable for low-power applications requiring stable 5V rails.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	100mA
Input Voltage (Max)	30V
Voltage Dropout (Max)	0.45V @ 100mA
Quiescent Current	120 µA
Operating Temperature Range	-40°C to 125°C
Package Type	TO-252-3 DPAK
Mounting Type	Surface Mount
Protection Features	Over Current, Over Temperature

Substitute Part Grouping Explanation

Substitution for the LP2950CDT-5.0 is determined by the following critical parameters:

Fixed 5V output voltage
100mA minimum output current capability
TO-252-3 DPAK package compatibility
Maximum input voltage of 25V or higher
Operating temperature range of -40°C to 125°C
Surface mount configuration

Parts are grouped into three categories:

Direct Manufacturer Equivalent: LP2950CDT-5.0G maintains identical electrical specifications and packaging, with the primary difference being active product status and improved RoHS compliance.

Parametric Equivalent: LP2950ACDT-5.0G provides identical electrical performance and packaging with active status and RoHS3 compliance.

Similar Alternatives: BA05CC0FP-E2, LP2950CDT-5.0/NOPB, LP2950CDTX-5.0/NOPB, and SM72238TD-5.0/NOPB meet the core functional requirements with minor variations in quiescent current, dropout voltage, or protection features.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	Package	Product Status	RoHS Status
LP2950CDT-5.0	onsemi	5V	100mA	30V	0.45V @ 100mA	120 µA	TO-252-3 DPAK	Obsolete	Non-compliant
LP2950CDT-5.0G	onsemi	5V	100mA	30V	0.45V @ 100mA	120 µA	TO-252-3 DPAK	Active	RoHS3 Compliant
LP2950ACDT-5.0G	onsemi	5V	100mA	30V	0.45V @ 100mA	120 µA	TO-252-3 DPAK	Active	RoHS3 Compliant
BA05CC0FP-E2	Rohm Semiconductor	5V	1A	25V	Not specified	2.5 mA	TO-252-3 DPAK	Active	RoHS3 Compliant
LP2950CDT-5.0/NOPB	National Semiconductor	5V	100mA	30V	0.6V @ 100mA	120 µA	TO-252-3 DPAK	Active	Not specified
LP2950CDTX-5.0/NOPB	National Semiconductor	5V	100mA	30V	0.6V @ 100mA	120 µA	TO-252-3 DPAK	Active	Not specified
SM72238TD-5.0/NOPB	Texas Instruments	5V	100mA	30V	0.6V @ 100mA	140 µA	TO-252-3 DPAK	Active	RoHS3 Compliant

Engineering Selection Recommendations

For direct replacement with active product status: LP2950CDT-5.0G or LP2950ACDT-5.0G are preferred selections. Both are manufactured by onsemi, maintain identical electrical specifications to the obsolete LP2950CDT-5.0, and carry RoHS3 compliance certification.

For higher output current applications: BA05CC0FP-E2 from Rohm Semiconductor provides 1A output capability in the same TO-252-3 package with RoHS3 compliance. This part is suitable when load requirements exceed 100mA.

For alternative sourcing: LP2950CDT-5.0/NOPB, LP2950CDTX-5.0/NOPB (National Semiconductor), and SM72238TD-5.0/NOPB (Texas Instruments) maintain the 100mA output specification and 30V input rating. The National Semiconductor variants show slightly higher dropout voltage (0.6V vs 0.45V). SM72238TD-5.0/NOPB includes RoHS3 compliance and carries short-circuit protection in addition to over-current and over-temperature protection.

Frequently Asked Questions (FAQ)

Q: Can LP2950CDT-5.0G be used as a direct drop-in replacement for LP2950CDT-5.0?

A: Yes. LP2950CDT-5.0G maintains identical electrical specifications, output voltage, current rating, and TO-252-3 DPAK package. The primary differences are active product status and RoHS3 compliance, making it a direct equivalent.

Q: What is the difference between LP2950CDT-5.0G and LP2950ACDT-5.0G?

A: Both parts are onsemi products with identical electrical performance and packaging. The difference lies in the device grade designation (C vs A), which may reflect different manufacturing or qualification criteria. Both are active and RoHS3 compliant.

Q: Can BA05CC0FP-E2 replace LP2950CDT-5.0 in all applications?

A: BA05CC0FP-E2 is electrically compatible for 5V regulation but provides 1A output current versus 100mA. It is suitable for applications requiring higher current capacity. The input voltage maximum is 25V (versus 30V for LP2950CDT-5.0), which may be a constraint in high-input-voltage designs. Package and mounting type are identical.

Q: What is the significance of the /NOPB suffix on National Semiconductor and Texas Instruments parts?

A: The /NOPB designation indicates "No Plumbum" (lead-free) manufacturing. These parts meet RoHS requirements. Electrical performance is equivalent to the base part number.

Q: Are there any performance differences between the onsemi LP2950 variants and the National Semiconductor LP2950CDT-5.0/NOPB?

A: The National Semiconductor variant shows a maximum dropout voltage of 0.6V at 100mA, compared to 0.45V for onsemi parts. This 0.15V difference may be significant in applications with tight input voltage margins. Quiescent current and output current specifications are identical.

Q: Is SM72238TD-5.0/NOPB from Texas Instruments a suitable alternative?

A: Yes. SM72238TD-5.0/NOPB meets all core specifications with 100mA output, 5V fixed output, and TO-252-3 packaging. Quiescent current is slightly higher at 140 µA versus 120 µA. This part includes short-circuit protection in addition to over-current and over-temperature protection, and carries RoHS3 compliance.

Q: What packaging considerations apply to these substitutes?

A: All listed substitutes use the TO-252-3 DPAK package with identical pinout and footprint. Surface mount assembly processes and PCB layouts are directly compatible. Moisture sensitivity level is 1 (unlimited) for all parts, indicating no special storage or handling requirements.

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