LP2950ACDT-5.0G Equivalent & Substitute Parts

Part Overview

The LP2950ACDT-5.0G is a linear voltage regulator IC from onsemi, classified as a Power Management (PMIC) component. It delivers a fixed positive 5V output at 100mA with a maximum dropout voltage of 0.45V at full load. The device operates across an industrial temperature range of -40°C to 125°C and includes integrated over-current and over-temperature protection. This part is currently in active production status with 2000 units available in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the specified parameter tolerances.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Part Number	LP2950ACDT-5.0G
Category	Power Management (PMIC)
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Output Configuration	Positive Fixed
Voltage - Output (Fixed)	5V
Current - Output	100mA
Voltage - Input (Max)	30V
Voltage Dropout (Max)	0.45V @ 100mA
Current - Quiescent (Iq)	120 µA
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the LP2950ACDT-5.0G are qualified based on the following critical parameters:

Fixed output voltage of 5V
Output current capability of 100mA
Maximum input voltage of 30V
Surface mount DPAK package (TO-252-3)
Operating temperature range of -40°C to 125°C
Positive fixed output configuration
Single regulator topology

The LP2950CDTX-5.0/NOPB and LP2950CDT-5.0/NOPB are functionally equivalent alternatives manufactured by National Semiconductor. Both maintain identical electrical specifications for output voltage, current capacity, input voltage rating, and temperature range. All three parts share the same DPAK package footprint and pinout, enabling direct board-level substitution. Differences in dropout voltage and quiescent current specifications remain within acceptable tolerance ranges for typical linear regulator applications.

Parameter Comparison

Parameter	LP2950ACDT-5.0G (onsemi)	LP2950CDTX-5.0/NOPB (National Semiconductor)	LP2950CDT-5.0/NOPB (National Semiconductor)
Output Voltage (Fixed)	5V	5V	5V
Output Current	100mA	100mA	100mA
Voltage - Input (Max)	30V	30V	30V
Voltage Dropout (Max)	0.45V @ 100mA	0.6V @ 100mA	0.6V @ 100mA
Current - Quiescent (Iq)	120 µA	120 µA	120 µA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts maintain active production status and are suitable for new designs and production applications. The LP2950ACDT-5.0G offers the lowest dropout voltage specification at 0.45V, providing superior performance in low-input-voltage applications. The LP2950CDTX-5.0/NOPB and LP2950CDT-5.0/NOPB are direct functional equivalents with dropout voltage of 0.6V, acceptable for most standard linear regulator applications. Selection between these alternatives should be based on dropout voltage requirements, supply chain availability, and lead time considerations. All parts comply with RoHS3 and REACH regulations, supporting environmental compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can LP2950CDTX-5.0/NOPB and LP2950CDT-5.0/NOPB be used interchangeably with LP2950ACDT-5.0G?

A: Yes. Both National Semiconductor parts are pin-compatible and functionally equivalent. They share identical output voltage, current rating, input voltage range, and operating temperature specifications. The DPAK package footprint is identical across all three parts, enabling direct board-level substitution.

Q: What is the significance of the 0.15V difference in dropout voltage between LP2950ACDT-5.0G and the National Semiconductor alternatives?

A: The LP2950ACDT-5.0G specifies 0.45V dropout at 100mA, while LP2950CDTX-5.0/NOPB and LP2950CDT-5.0/NOPB specify 0.6V. This difference is relevant only in applications with marginal input voltage headroom. For typical designs with adequate input voltage margin above the 5V output requirement, this variation is not functionally significant.

Q: Are there package differences between these parts?

A: No. All three parts use the TO-252-3 DPAK package with identical pinout and footprint. Surface mount assembly processes and PCB layouts are directly compatible.

Q: What protection features distinguish LP2950CDTX-5.0/NOPB from the other two parts?

A: LP2950CDTX-5.0/NOPB includes short-circuit protection in addition to over-current and over-temperature protection. LP2950ACDT-5.0G and LP2950CDT-5.0/NOPB provide over-current and over-temperature protection. The additional short-circuit protection in LP2950CDTX-5.0/NOPB offers enhanced fault tolerance in applications subject to output short conditions.

Q: Do all parts meet the same regulatory and compliance standards?

A: Yes. All three parts are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

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