LP2952AIM Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The LP2952AIM is a linear voltage regulator IC from Texas Instruments designed for positive adjustable (fixed) output applications with 250mA current capacity in a 16-SOIC surface mount package. This device operates across an input voltage range of up to 30V and provides output voltage adjustment from 1.23V to 29V with integrated protection features including over-current, over-temperature, and reverse polarity protection.

The LP2952AIM is currently in Last Time Buy status, making equivalent and substitute parts essential for ongoing design support and procurement planning. Direct substitutes and parametric equivalents are available from Texas Instruments and National Semiconductor with varying packaging and compliance certifications.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Adjustable (Fixed)
Number of Regulators	1
Voltage - Input (Max)	30V
Voltage - Output (Min/Fixed)	1.23V (5V)
Voltage - Output (Max)	29V
Current - Output	250mA
Current - Quiescent (Iq)	170 µA
Control Features	Enable
Protection Features	Over Current, Over Temperature, Reverse Polarity
Operating Temperature	-40°C ~ 125°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the LP2952AIM is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Output Configuration: Positive
Output Type: Adjustable (Fixed)
Number of Regulators: 1
Voltage - Input (Max): 30V
Voltage - Output Range: 1.23V to 29V
Current - Output: 250mA
Current - Quiescent (Iq): 170 µA
Protection Features: Over Current, Over Temperature, Reverse Polarity
Operating Temperature: -40°C ~ 125°C
Package / Case: 16-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

All substitute parts listed maintain identical electrical specifications and package dimensions. Variations exist only in packaging format (Bulk, Tape & Reel, Tube), manufacturer designation (Texas Instruments vs. National Semiconductor), and compliance certifications (RoHS, REACH status).

Parameter Comparison

Part Number	Manufacturer	Packaging	Product Status	Voltage Dropout (Max)	Current - Supply (Max)	RoHS Status	Inventory (Pcs)
LP2952AIM	Texas Instruments	-	Last Time Buy	0.6V @ 100mA	33 mA	ROHS3 Compliant	4033
LP2952AIM/NOPB	Texas Instruments	Bulk	Active	0.8V @ 250mA	33 mA	ROHS3 Compliant	978
LP2952AIMX/NOPB	Texas Instruments	Tape & Reel (TR)	Active	0.8V @ 250mA	33 mA	ROHS3 Compliant	5300
LP2952IM/NOPB	National Semiconductor	-	Active	0.8V @ 250mA	33 mA	RoHS non-compliant	2200
LP2953AIM/NOPB	Texas Instruments	Tube	Active	0.8V @ 250mA	33 mA	ROHS3 Compliant	1278
LP2953IM/NOPB	National Semiconductor	Bulk	Active	0.8V @ 250mA	33 mA	RoHS non-compliant	1012
LP2952AIM-TI	Texas Instruments	Bulk	Active	0.8V @ 250mA	33 mA	RoHS non-compliant	5026
LP2952IM	National Semiconductor	Bulk	Active	0.8V @ 250mA	33 mA	RoHS non-compliant	2478
LP2952IM-TI	Texas Instruments	Bulk	Active	0.8V @ 250mA	33 mA	RoHS non-compliant	7070
LP2953IM	National Semiconductor	-	Active	0.8V @ 250mA	33 mA	RoHS non-compliant	2200

Engineering Selection Recommendations

For RoHS3 Compliant Applications: Select LP2952AIMX/NOPB (Tape & Reel), LP2952AIM/NOPB (Bulk), or LP2953AIM/NOPB (Tube). These parts maintain ROHS3 compliance and REACH unaffected status, suitable for regulated markets and environmental compliance requirements. LP2952AIMX/NOPB offers the highest inventory availability at 5300 units.

For Active Product Status with Maximum Availability: LP2952IM-TI provides 7070 units in stock with active product status. This part is suitable for applications where RoHS compliance is not a requirement. LP2952AIMX/NOPB is the alternative for RoHS-compliant designs with 5300 units available.

For Tape & Reel Packaging (Automated Assembly): LP2952AIMX/NOPB is the only substitute available in Tape & Reel format, essential for high-volume automated manufacturing processes.

For Tube Packaging (Manual Assembly): LP2953AIM/NOPB is available in Tube packaging with 1278 units in stock and ROHS3 compliance.

Voltage Dropout Consideration: The original LP2952AIM specifies 0.6V dropout at 100mA. All active substitutes specify 0.8V dropout at 250mA. This represents a measurable difference in low-voltage applications. Verify dropout performance requirements before substitution in designs operating near minimum input voltage margins.

Frequently Asked Questions (FAQ)

Q: Can LP2952AIM be directly replaced with LP2952AIM/NOPB? A: Yes. Both parts are electrically identical with identical package dimensions (16-SOIC). The /NOPB designation indicates lead-free, RoHS3 compliant construction. The primary difference is packaging format (Bulk vs. unspecified) and product status (Active vs. Last Time Buy).

Q: What is the difference between LP2952 and LP2953 variants? A: Both LP2952 and LP2953 maintain identical electrical specifications and package dimensions. The variant designation reflects different manufacturing batches or internal revisions from National Semiconductor. All parameters remain equivalent for substitution purposes.

Q: Is LP2952IM-TI interchangeable with LP2952AIM? A: Electrically yes, with compliance caveats. LP2952IM-TI is RoHS non-compliant and REACH affected, while LP2952AIM is ROHS3 compliant and REACH unaffected. Substitution is valid only in applications without RoHS or REACH requirements.

Q: Which substitute offers the best inventory availability? A: LP2952IM-TI provides 7070 units in stock. For RoHS3 compliant designs, LP2952AIMX/NOPB offers 5300 units in Tape & Reel format.

Q: Does packaging format affect electrical performance? A: No. Bulk, Tape & Reel, and Tube packaging formats contain identical die and electrical characteristics. Packaging selection is determined by assembly process requirements (manual vs. automated) and inventory management practices.

Q: What is the significance of the voltage dropout specification difference? A: The original LP2952AIM specifies 0.6V dropout at 100mA, while substitutes specify 0.8V at 250mA. This indicates the original part was characterized at lower current. In applications operating near minimum input voltage margins, verify that the 0.8V dropout specification at full 250mA output current meets system requirements.

Q: Are National Semiconductor parts (LP2952IM, LP2953IM) compatible with Texas Instruments designs? A: Yes, electrically compatible. However, National Semiconductor parts are RoHS non-compliant and REACH affected. Use only in applications without regulatory compliance requirements. Texas Instruments variants (LP2952AIM/NOPB, LP2952AIMX/NOPB, LP2953AIM/NOPB) are recommended for new designs.

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