LP2950CDT-5.0G Equivalent & Substitute Parts

Part Overview

The LP2950CDT-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. Currently in active production status with 6200 units in stock, this component is widely used in low-power applications requiring stable 5V regulation from input sources up to 30V.

Identifying equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and optimize component sourcing across manufacturing environments.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP2950CDT-5.0G
Manufacturer	onsemi
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	5V
Voltage - Input (Max)	30V
Current - Output	100mA
Voltage Dropout (Max)	0.45V @ 100mA
Current - Quiescent (Iq)	120 µA
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount
Protection Features	Over Current, Over Temperature
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP2950CDT-5.0G are identified based on strict electrical and mechanical parameter alignment. The substitution criteria are:

Fixed positive 5V output voltage
100mA output current capability
Maximum input voltage of 30V
TO-252-3 (DPAK) surface mount package
Operating temperature range of -40°C to 125°C
Over-current and over-temperature protection features
Active product status
RoHS3 compliance

The identified substitutes maintain these core parameters while originating from National Semiconductor. Variations in dropout voltage (0.6V versus 0.45V) and quiescent current (14 mA versus 12 mA maximum supply current) represent acceptable engineering tolerances within the LP2950 product family.

Parameter Comparison

Parameter	LP2950CDT-5.0G (onsemi)	LP2950CDTX-5.0/NOPB (National Semiconductor)	LP2950CDT-5.0/NOPB (National Semiconductor)
Manufacturer	onsemi	National Semiconductor	National Semiconductor
Output Configuration	Positive	Positive	Positive
Output Type	Fixed	Fixed	Fixed
Voltage - Output (Min/Fixed)	5V	5V	5V
Voltage - Input (Max)	30V	30V	30V
Current - Output	100mA	100mA	100mA
Voltage Dropout (Max)	0.45V @ 100mA	0.6V @ 100mA	0.6V @ 100mA
Current - Quiescent (Iq)	120 µA	120 µA	120 µA
Current - Supply (Max)	12 mA	14 mA	14 mA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C (TJ)	-40°C ~ 125°C
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature
Product Status	Active	Active	Active
ECCN	EAR99	EAR99	EAR99
HTSUS	8542.39.0001	8542.39.0001	8542.39.0001

Engineering Selection Recommendations

All three parts—LP2950CDT-5.0G, LP2950CDTX-5.0/NOPB, and LP2950CDT-5.0/NOPB—are active products with RoHS3 compliance and identical regulatory classifications (ECCN: EAR99, HTSUS: 8542.39.0001). They are functionally interchangeable in applications requiring fixed 5V regulation at 100mA with TO-252-3 surface mount packaging.

The LP2950CDTX-5.0/NOPB variant includes short-circuit protection in addition to over-current and over-temperature protection, providing enhanced fault tolerance. The National Semiconductor variants exhibit a slightly higher maximum dropout voltage of 0.6V compared to the onsemi part's 0.45V, which may impact efficiency in applications with tight input voltage margins.

Selection should be based on component availability, supply chain requirements, and specific application thermal or efficiency constraints.

Frequently Asked Questions (FAQ)

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

A: Yes. All three parts deliver fixed 5V output at 100mA with identical quiescent current (120 µA), operating temperature range (-40°C to 125°C), and TO-252-3 package configuration. The primary difference is dropout voltage specification: the onsemi part specifies 0.45V maximum, while the National Semiconductor variants specify 0.6V maximum at 100mA load.

Q: What is the significance of the dropout voltage difference?

A: Dropout voltage determines the minimum input voltage required to maintain regulated output. The LP2950CDT-5.0G requires a minimum input of approximately 5.45V at full load, while the National Semiconductor variants require approximately 5.6V. Applications with input voltages below 5.6V should use the onsemi part to ensure reliable regulation.

Q: Does the LP2950CDTX-5.0/NOPB short-circuit protection feature affect compatibility?

A: No. Short-circuit protection is an additional safety feature that does not affect electrical compatibility. It provides enhanced fault tolerance without changing the part's normal operating characteristics or pin configuration.

Q: Are all three parts suitable for industrial temperature applications?

A: Yes. All three parts operate across the industrial temperature range of -40°C to 125°C and are suitable for applications requiring extended temperature performance.

Q: What is the package compatibility between these parts?

A: All three parts use the TO-252-3 (DPAK) surface mount package with identical pin configuration and footprint. They are directly interchangeable at the PCB level without layout modifications.

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