LP2992AIM5-5.0 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The LP2992AIM5-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 250mA current capacity in SOT-23-5 surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The device provides regulated 5V output from input voltages up to 16V with integrated protection features including over-current, over-temperature, and short-circuit protection.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP2992AIM5-5.0
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	5V
Output Current	250mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.85V @ 250mA
Quiescent Current	95 µA
Package / Case	SC-74A, SOT-753 (SOT-23-5)
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the LP2992AIM5-5.0 are categorized based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Output voltage: 5V fixed
Package type: SOT-23-5 (SC-74A, SOT-753)
Mounting type: Surface Mount
Output configuration: Positive
Control features: Enable function
Protection features: Over Current and Over Temperature minimum

Parametric Equivalents maintain identical electrical specifications including 250mA output current, 16V maximum input voltage, and 0.85V dropout voltage. These parts are direct replacements from Texas Instruments with active product status and improved RoHS compliance.

Manufacturer Recommended Alternatives provide functional equivalence with variations in output current capacity, dropout voltage, quiescent current, or input voltage limits. These parts maintain the 5V output, SOT-23-5 package, and surface mount configuration while offering different performance characteristics suited to specific application requirements.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Product Status	RoHS Status
LP2992AIM5-5.0	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	Obsolete	RoHS non-compliant
LP2992AIM5-5.0/NOPB	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	Active	ROHS3 Compliant
LP2992AIM5X-5.0/NOPB	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	Active	ROHS3 Compliant
LP2992IM5-5.0/NOPB	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	Active	ROHS3 Compliant
LP2992IM5X-5.0/NOPB	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	Active	ROHS3 Compliant
AP2210K-5.0TRG1	Diodes Incorporated	300mA	13.2V	0.5V @ 300mA	180 µA	Active	ROHS3 Compliant
LD2985BM50R	STMicroelectronics	150mA	16V	0.575V @ 150mA	150 µA	Active	ROHS3 Compliant
SPX3819M5-L-5-0/TR	MaxLinear, Inc.	500mA	16V	0.7V @ 500mA	8 µA	Active	ROHS3 Compliant
SPX5205M5-L-5-0/TR	MaxLinear, Inc.	150mA	16V	0.35V @ 150mA	5 µA	Active	RoHS Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Obsolete Part Replacement):

The LP2992AIM5-5.0/NOPB, LP2992AIM5X-5.0/NOPB, LP2992IM5-5.0/NOPB, and LP2992IM5X-5.0/NOPB are direct electrical and mechanical equivalents from Texas Instruments. These parts maintain identical output current (250mA), input voltage rating (16V), and dropout voltage specifications. All are active products with ROHS3 compliance, making them suitable for new designs and production environments requiring RoHS certification. The /NOPB suffix indicates lead-free and halogen-free packaging.

Manufacturer Recommended Alternatives (Application-Dependent Selection):

The AP2210K-5.0TRG1 from Diodes Incorporated provides 300mA output current with improved dropout voltage (0.5V) but operates at a lower maximum input voltage (13.2V). This part is suitable for applications requiring higher output current within the 13.2V input constraint.

The LD2985BM50R from STMicroelectronics delivers 150mA output current with lower dropout voltage (0.575V) and maintains 16V input voltage rating. This part is appropriate for lower-current applications prioritizing reduced power dissipation.

The SPX3819M5-L-5-0/TR from MaxLinear provides the highest output current (500mA) with 16V input voltage rating and very low quiescent current (8 µA). This part suits high-current applications or battery-powered systems requiring minimal standby power consumption.

The SPX5205M5-L-5-0/TR from MaxLinear offers 150mA output current with the lowest dropout voltage (0.35V) and extremely low quiescent current (5 µA). This part is optimal for low-power applications with tight thermal budgets, though operating temperature range is limited to -40°C ~ 85°C.

All substitute parts maintain SOT-23-5 packaging and surface mount configuration, ensuring mechanical compatibility with existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can I use LP2992AIM5-5.0/NOPB as a direct replacement for the obsolete LP2992AIM5-5.0?

A: Yes. The LP2992AIM5-5.0/NOPB is electrically and mechanically identical to the original part, with the primary difference being active product status and ROHS3 compliance. It is the recommended direct replacement.

Q: What is the difference between the LP2992 variants (AIM5, IM5, AIM5X, IM5X)?

A: All variants maintain identical electrical specifications (250mA output, 5V fixed, 16V input max, 0.85V dropout). The variants differ in manufacturing process codes and packaging designations. All active variants with /NOPB suffix are functionally equivalent and suitable for direct substitution.

Q: Can I use the AP2210K-5.0TRG1 if my application requires 250mA output?

A: The AP2210K-5.0TRG1 provides 300mA output current, which exceeds the 250mA requirement. However, the maximum input voltage is limited to 13.2V compared to the original 16V. Use this part only if your input voltage does not exceed 13.2V.

Q: Which substitute part should I choose for a battery-powered application?

A: The SPX5205M5-L-5-0/TR offers the lowest quiescent current (5 µA) and dropout voltage (0.35V), making it ideal for battery-powered systems. However, verify that your operating temperature range does not exceed -40°C ~ 85°C, as this part has a narrower temperature specification than the original.

Q: Are all substitute parts available in SOT-23-5 packaging?

A: Yes. All listed substitute parts use SC-74A or SOT-753 designations, which are equivalent to SOT-23-5 packaging. They are mechanically compatible with existing PCB layouts designed for the LP2992AIM5-5.0.

Q: What is the significance of the /NOPB suffix on Texas Instruments parts?

A: The /NOPB suffix indicates lead-free (Pb-free) and halogen-free packaging, meeting RoHS3 compliance requirements. Parts without this suffix may contain lead and are not suitable for RoHS-regulated applications.

Q: If my application only requires 150mA output, should I use LD2985BM50R or SPX5205M5-L-5-0/TR?

A: Both parts provide 150mA output. The SPX5205M5-L-5-0/TR offers superior dropout voltage (0.35V vs 0.575V) and lower quiescent current (5 µA vs 150 µA), resulting in reduced power dissipation. Choose SPX5205M5-L-5-0/TR unless your operating temperature exceeds 85°C, in which case use LD2985BM50R.

Q: Can I use SPX3819M5-L-5-0/TR for a 250mA application?

A: Yes. The SPX3819M5-L-5-0/TR provides 500mA output current, which exceeds the 250mA requirement. It is suitable for applications requiring higher current capacity or where future current scaling is anticipated. The extremely low quiescent current (8 µA) provides additional efficiency benefits.

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