LP2950ACDT-3.0 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The LP2950ACDT-3.0 is a linear voltage regulator IC from onsemi, delivering a fixed 3V output at 100mA in a TO-252-3 (DPAK) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The LP2950ACDT-3.0 provides positive fixed output regulation with integrated over-current and over-temperature protection, suitable for low-power applications requiring stable 3V rails. Due to its obsolete status, active alternatives from Texas Instruments and Rohm Semiconductor are available to maintain design continuity.

Key Parameters

Parameter	Value
Manufacturer	onsemi
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 ~ 125°C
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Protection Features	Over Current, Over Temperature
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the LP2950ACDT-3.0 is determined by the following critical parameters:

Output Voltage: Must be fixed at 3V
Package / Case: Must be TO-252-3 (DPAK) for mechanical and thermal compatibility
Output Configuration: Must be positive fixed output
Number of Regulators: Must be single regulator (1 output)
Mounting Type: Must be surface mount

Substitute parts are grouped into two categories:

Parametric Equivalents (LP2950CDTX-3.0/NOPB, LP2950CDT-3.0/NOPB): Functionally identical specifications including 100mA output current, 30V maximum input voltage, and 120 µA quiescent current. These parts maintain the same electrical performance envelope as the original part.

Functional Substitutes (BA03CC0FP-E2, BA30BC0FP-E2): Higher output current capability (1A) with identical 3V fixed output and TO-252-3 package. These parts provide enhanced current delivery while maintaining pin-compatible packaging and thermal characteristics.

Parameter Comparison

Parameter	LP2950ACDT-3.0 (Main)	LP2950CDT-3.0/NOPB	LP2950CDTX-3.0/NOPB	BA03CC0FP-E2	BA30BC0FP-E2
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Rohm Semiconductor	Rohm Semiconductor
Output Voltage (Fixed)	3V	3V	3V	3V	3V
Output Current	100mA	100mA	100mA	1A	1A
Input Voltage (Max)	30V	30V	30V	25V	16V
Voltage Dropout (Max)	0.45V @ 100mA	0.6V @ 100mA	0.6V @ 100mA	—	—
Quiescent Current	120 µA	120 µA	120 µA	2.5 mA	0.5 mA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C (TJ)	-40°C ~ 125°C	-40°C ~ 105°C
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Over Voltage	Over Current, Over Temperature
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

LP2950CDT-3.0/NOPB and LP2950CDTX-3.0/NOPB from Texas Instruments are active products offering identical electrical specifications to the LP2950ACDT-3.0. Both are ROHS3 compliant and maintain the same 100mA output current, 30V maximum input voltage, and 120 µA quiescent current. The primary difference is packaging: LP2950CDT-3.0/NOPB is supplied in Tube, while LP2950CDTX-3.0/NOPB is supplied in Tape & Reel. Both are pin-compatible and thermally equivalent in the TO-252-3 package.

For Enhanced Current Capability:

BA03CC0FP-E2 (Rohm Semiconductor) provides 1A output current with identical 3V fixed output and TO-252-3 package compatibility. This part supports higher load currents while maintaining the same thermal footprint. Maximum input voltage is 25V (versus 30V for the original), and quiescent current is higher at 2.5 mA. This substitute is suitable for applications requiring increased current delivery within the 25V input constraint.

BA30BC0FP-E2 (Rohm Semiconductor) also delivers 1A output current with 3V fixed output in TO-252-3 package. This part features the lowest quiescent current (0.5 mA) among all substitutes, making it optimal for battery-powered or low-power standby applications. Maximum input voltage is limited to 16V, and operating temperature range is -40°C ~ 105°C (versus 125°C for the original). This part is suitable for applications with input voltages below 16V and operating temperatures not exceeding 105°C.

All substitute parts are ROHS3 compliant and REACH unaffected, supporting modern procurement and environmental compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can I use BA03CC0FP-E2 or BA30BC0FP-E2 as direct drop-in replacements for LP2950ACDT-3.0?

A: Yes, mechanically and electrically. All three parts share identical TO-252-3 (DPAK) packaging with the same pin configuration and thermal characteristics. The BA03CC0FP-E2 and BA30BC0FP-E2 provide higher output current (1A versus 100mA), which is compatible with designs requiring 100mA or less. However, verify that your input voltage and operating temperature requirements fall within the specified limits for each substitute.

Q: What is the difference between LP2950CDT-3.0/NOPB and LP2950CDTX-3.0/NOPB?

A: Both parts are parametric equivalents with identical electrical specifications. The primary difference is packaging: LP2950CDT-3.0/NOPB is supplied in Tube, while LP2950CDTX-3.0/NOPB is supplied in Tape & Reel (TR). Choose based on your procurement and assembly requirements. LP2950CDTX-3.0/NOPB includes short-circuit protection, while LP2950CDT-3.0/NOPB does not.

Q: Which substitute should I choose if my application requires maximum input voltage of 30V?

A: LP2950CDT-3.0/NOPB or LP2950CDTX-3.0/NOPB from Texas Instruments both support 30V maximum input voltage, matching the original LP2950ACDT-3.0. BA03CC0FP-E2 supports 25V maximum, and BA30BC0FP-E2 supports only 16V maximum. If your design requires 30V input capability, use the Texas Instruments parametric equivalents.

Q: Are all substitute parts RoHS compliant?

A: Yes. LP2950CDT-3.0/NOPB, LP2950CDTX-3.0/NOPB, BA03CC0FP-E2, and BA30BC0FP-E2 are all ROHS3 compliant. The original LP2950ACDT-3.0 is RoHS non-compliant. If RoHS compliance is required for your application, any of the four substitute parts satisfy this requirement.

Q: What is the impact of higher quiescent current in BA03CC0FP-E2 compared to the original part?

A: BA03CC0FP-E2 has a quiescent current of 2.5 mA versus 120 µA for the original LP2950ACDT-3.0. This represents approximately 20 times higher standby current draw. For battery-powered or low-power standby applications, this difference is significant. BA30BC0FP-E2 with 0.5 mA quiescent current is a better choice for such applications.

Q: Can I use BA30BC0FP-E2 if my application operates at 125°C?

A: No. BA30BC0FP-E2 has a maximum operating temperature of 105°C, while the original LP2950ACDT-3.0 and other substitutes support -40°C ~ 125°C. If your application requires operation at temperatures above 105°C, use LP2950CDT-3.0/NOPB, LP2950CDTX-3.0/NOPB, or BA03CC0FP-E2.

Q: Are the pin configurations identical across all substitute parts?

A: Yes. All parts use the TO-252-3 (DPAK) package with 2 leads plus tab, maintaining identical pin configuration and PCB footprint. No layout modifications are required when substituting between these parts.

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