LP2950ACDT-3.0G Equivalent & Substitute Parts

Part Overview

The LP2950ACDT-3.0G is a linear voltage regulator IC from onsemi, delivering a fixed 3V output at 100mA in a DPAK surface mount package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The device provides positive fixed output regulation with integrated over-current and over-temperature protection across an operating range of -40°C to 125°C.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Output voltage matching at 3V fixed
Output current capability (100mA minimum for direct replacement)
Input voltage rating (30V maximum acceptable)
Package compatibility (TO-252-3 DPAK form factor)
Operating temperature range (-40°C to 125°C minimum)
Protection features (over-current and over-temperature required)

Substitute parts are grouped into two categories:

Direct Substitutes (Same Output Current): Parts maintaining 100mA output current with identical electrical specifications and packaging.

Higher Current Alternatives: Parts with 1A output capability in the same package, suitable for applications where increased current headroom is acceptable and beneficial.

Parameter Comparison

Parameter	LP2950ACDT-3.0G (Main)	LP2950CDT-3.0RKG	LP2950CDTX-3.0/NOPB	LP2950CDT-3.0/NOPB	BA03CC0FP-E2	BA30BC0FP-E2
Manufacturer	onsemi	onsemi	Texas Instruments	Texas Instruments	Rohm Semiconductor	Rohm Semiconductor
Output Voltage	3V	3V	3V	3V	3V	3V
Output Current	100mA	100mA	100mA	100mA	1A	1A
Input Voltage (Max)	30V	30V	30V	30V	25V	16V
Voltage Dropout (Max)	0.45V @ 100mA	0.45V @ 100mA	0.6V @ 100mA	0.6V @ 100mA	Not specified	Not specified
Quiescent Current	120 µA	120 µA	120 µA	120 µA	2.5 mA	0.5 mA
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 105°C
Package	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK
Product Status	Obsolete	Active	Active	Active	Active	Active
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature	Over Current, Over Temperature, Over Voltage	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (100mA Output Current):

LP2950CDT-3.0RKG from onsemi is the primary substitute, maintaining identical electrical specifications and dropout characteristics while offering active product status. This part is available in tape and reel packaging with full ROHS3 compliance.

LP2950CDT-3.0/NOPB and LP2950CDTX-3.0/NOPB from Texas Instruments provide equivalent functionality with active status. Both maintain the 100mA output current and -40°C to 125°C operating range. The CDTX variant includes short-circuit protection as an additional safeguard.

For Higher Current Applications (1A Output Current):

BA03CC0FP-E2 from Rohm Semiconductor delivers 1A output capability in the same TO-252-3 package with active product status and ROHS3 compliance. This part accepts input voltages up to 25V and includes over-voltage protection.

BA30BC0FP-E2 from Rohm Semiconductor offers 1A output with the lowest quiescent current (0.5 mA) among all substitutes. Input voltage rating is limited to 16V maximum, and the operating temperature range extends only to 105°C.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can LP2950CDT-3.0RKG directly replace LP2950ACDT-3.0G?

A: Yes. Both parts deliver 3V at 100mA with identical dropout voltage (0.45V @ 100mA), quiescent current (120 µA), and operating temperature range (-40°C to 125°C). The primary difference is packaging format (tape and reel versus tube) and product status (active versus obsolete).

Q: What is the difference between the onsemi and Texas Instruments LP2950 variants?

A: The onsemi LP2950CDT-3.0RKG and Texas Instruments LP2950CDT-3.0/NOPB and LP2950CDTX-3.0/NOPB all meet the core 100mA, 3V specification. Texas Instruments variants specify slightly higher dropout voltage (0.6V versus 0.45V @ 100mA) and higher supply current (14 mA versus 12 mA). The CDTX variant adds short-circuit protection.

Q: Can I use the 1A Rohm parts (BA03CC0FP-E2 or BA30BC0FP-E2) as substitutes?

A: Yes, both Rohm parts are compatible in applications where 100mA output current is required. The higher 1A capability provides additional design margin. However, verify that your input voltage does not exceed 25V for BA03CC0FP-E2 or 16V for BA30BC0FP-E2. The BA30BC0FP-E2 operating temperature range is limited to -40°C to 105°C.

Q: Are all substitute parts in the same physical package?

A: Yes. All parts use the TO-252-3 DPAK package with identical pinout and footprint compatibility.

Q: What compliance certifications apply to these parts?

A: All parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes.

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