LP2950CZ-5.0RPG Equivalent & Substitute Parts

Part Overview

The LP2950CZ-5.0RPG is a linear voltage regulator IC manufactured by onsemi, delivering a fixed positive 5V output at 100mA in a TO-92-3 through-hole package. This device is classified as a Power Management (PMIC) component and maintains Active product status. The LP2950CZ-5.0RPG serves applications requiring low-dropout regulation with integrated over-current and over-temperature protection across the industrial temperature range of -40°C to 125°C. Equivalent and substitute parts are identified based on matching electrical specifications, output configuration, package type, and regulatory compliance to ensure direct functional interchangeability in circuit designs.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Part Number	LP2950CZ-5.0RPG
Category	Power Management (PMIC)
Package Type	TO-226-3, TO-92-3 Long Body (Formed Leads)
Output Voltage (Fixed)	5V
Output Current	100mA
Input Voltage (Max)	30V
Dropout Voltage (Max)	0.45V @ 100mA
Quiescent Current	120 µA
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature
Mounting Type	Through Hole
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP2950CZ-5.0RPG are qualified based on the following critical parameters that determine functional interchangeability:

Output voltage fixed at 5V
Output current rating of 100mA
Maximum input voltage of 30V
Positive output configuration
Single regulator topology
TO-92-3 through-hole package
Operating temperature range -40°C to 125°C
Over-current and over-temperature protection
Active product status
ROHS3 compliance

All identified substitute parts maintain these core electrical and mechanical specifications. Variations in dropout voltage (0.45V to 0.6V) and maximum supply current (12mA to 14mA) remain within acceptable tolerances for this device category and do not affect functional substitution in standard applications.

Parameter Comparison

Parameter	LP2950CZ-5.0RPG (onsemi)	LP2950-50LPRE3 (TI)	LP2950CZ-5.0/LFT1 (TI)	LP2950CZ-5.0/LFT3 (TI)	LP2950CZ-5.0/LFT7 (TI)
Output Voltage	5V	5V	5V	5V	5V
Output Current	100mA	100mA	100mA	100mA	100mA
Input Voltage (Max)	30V	30V	30V	30V	30V
Dropout Voltage (Max)	0.45V @ 100mA	0.6V @ 100mA	0.6V @ 100mA	0.6V @ 100mA	0.6V @ 100mA
Quiescent Current	120 µA	120 µA	120 µA	120 µA	120 µA
Supply Current (Max)	12 mA	14 mA	14 mA	14 mA	14 mA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C	-40°C ~ 125°C (TJ)
Package Type	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit
Product Status	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment with current environmental standards. The LP2950CZ-5.0RPG (onsemi) offers the lowest dropout voltage specification at 0.45V, providing marginal efficiency advantage in applications with limited input voltage headroom. Texas Instruments variants LP2950CZ-5.0/LFT1 and LP2950CZ-5.0/LFT7 include short-circuit protection in addition to standard over-current and over-temperature protection, offering enhanced circuit robustness. All parts are functionally equivalent for standard 5V regulation applications and may be selected based on availability, lead time, and specific protection feature requirements.

Frequently Asked Questions (FAQ)

Q: Can LP2950CZ-5.0/LFT1 directly replace LP2950CZ-5.0RPG in existing designs?

A: Yes. Both parts deliver 5V at 100mA in TO-92-3 packages with matching input voltage ratings, quiescent current, and operating temperature ranges. The LP2950CZ-5.0/LFT1 includes additional short-circuit protection and operates at 0.6V dropout versus 0.45V for the onsemi part, which is acceptable for most applications.

Q: What is the difference between LP2950-50LPRE3 and LP2950CZ-5.0/LFT3?

A: Both are Texas Instruments LP2950 variants with identical electrical specifications. The primary difference is the part number designation and packaging code. LP2950-50LPRE3 uses the legacy naming convention, while LP2950CZ-5.0/LFT3 uses the current designation. Electrical performance and package type are equivalent.

Q: Are all substitute parts available in the same TO-92-3 package?

A: Yes. All listed substitute parts are specified for TO-226-3 and TO-92-3 through-hole packages with formed leads, ensuring mechanical and electrical compatibility with existing PCB layouts.

Q: Does the 0.15V difference in dropout voltage between onsemi and Texas Instruments parts affect circuit operation?

A: The dropout voltage difference (0.45V versus 0.6V) is within acceptable tolerance for standard 5V regulation applications. Selection depends on specific input voltage constraints. Applications with marginal input voltage headroom may benefit from the lower dropout specification of the onsemi part.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

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