LP2992AIM5X-1.8 Equivalent & Substitute Parts

Part Overview

The LP2992AIM5X-1.8 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed 1.8V output at 250mA in a surface-mount SOT-23-5 package. The main part is currently listed as obsolete, making equivalent and substitute parts essential for ongoing design support and production continuity. Identifying compatible alternatives ensures project viability when the original component becomes unavailable.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP2992AIM5X-1.8
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.8V
Output Current	250mA
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.85V @ 250mA
Quiescent Current	95 µA
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Operating Temperature	-40°C ~ 125°C
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the LP2992AIM5X-1.8 are grouped based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Output voltage: 1.8V fixed
Package type: SOT-23-5 (SC-74A, SOT-753)
Input voltage rating: 16V maximum
Operating temperature range: -40°C to 125°C minimum
Output configuration: Positive, fixed output
Control features: Enable function
Protection features: Over Current, Over Temperature, Short Circuit

Grouping Logic:

Parametric Equivalents (LP2992AIM5-1.8/NOPB, LP2992IM5-1.8/NOPB, LP2992IM5X-1.8/NOPB): These Texas Instruments parts share identical electrical specifications with the main part, including 250mA output current, 0.85V dropout voltage, and 95 µA quiescent current. Differences exist only in packaging format (Cut Tape & Digi-Reel vs. Tape & Reel) and product status (Active vs. Obsolete). All three are direct functional replacements.

Manufacturer Recommended Substitutes (LD2985BM18R, SPX3819M5-L-1-8/TR, SPX5205M5-L-1-8/TR): These parts meet the core requirements of 1.8V output, SOT-23-5 package, 16V input rating, and -40°C to 125°C operating range. However, each exhibits specific parameter variations that must be evaluated for application suitability.

Parameter Comparison

Parameter	LP2992AIM5X-1.8	LP2992AIM5-1.8/NOPB	LP2992IM5-1.8/NOPB	LP2992IM5X-1.8/NOPB	LD2985BM18R	SPX3819M5-L-1-8/TR	SPX5205M5-L-1-8/TR
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	STMicroelectronics	MaxLinear, Inc.	MaxLinear, Inc.
Output Voltage	1.8V	1.8V	1.8V	1.8V	1.8V	1.8V	1.8V
Output Current	250mA	250mA	250mA	250mA	150mA	500mA	150mA
Input Voltage (Max)	16V	16V	16V	16V	16V	16V	16V
Voltage Dropout (Max)	0.85V @ 250mA	0.85V @ 250mA	0.85V @ 250mA	0.85V @ 250mA	0.575V @ 150mA	Not specified	Not specified
Quiescent Current	95 µA	95 µA	95 µA	95 µA	150 µA	8 µA	5 µA
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

The three Texas Instruments parametric equivalents—LP2992AIM5-1.8/NOPB, LP2992IM5-1.8/NOPB, and LP2992IM5X-1.8/NOPB—are the primary choices. All three are active products with ROHS3 compliance, addressing the obsolescence and regulatory status of the main part. Selection among these three depends on packaging availability: LP2992AIM5-1.8/NOPB and LP2992IM5X-1.8/NOPB are supplied in Cut Tape & Digi-Reel format, while LP2992IM5-1.8/NOPB is supplied in Tape & Reel format. Choose based on procurement and assembly requirements.

For Applications Requiring Lower Output Current (150mA):

The LD2985BM18R from STMicroelectronics and SPX5205M5-L-1-8/TR from MaxLinear are suitable when the application load does not exceed 150mA. Both maintain the 1.8V output, SOT-23-5 package, and -40°C to 125°C operating range. The LD2985BM18R offers lower dropout voltage (0.575V @ 150mA) compared to the main part. The SPX5205M5-L-1-8/TR provides the lowest quiescent current (5 µA) and includes reverse polarity protection. Note that SPX5205M5-L-1-8/TR has a reduced upper operating temperature limit of 85°C.

For Applications Requiring Higher Output Current (500mA):

The SPX3819M5-L-1-8/TR from MaxLinear delivers 500mA output current, double the main part's rating, while maintaining the 1.8V output and SOT-23-5 package. This part features exceptionally low quiescent current (8 µA) and includes reverse polarity protection. Use this substitute when the application requires higher current delivery within the same form factor.

Compliance Considerations:

All substitute parts are RoHS compliant (ROHS3 or RoHS Compliant), addressing the non-compliance status of the obsolete main part. All maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can I use LP2992IM5-1.8/NOPB as a direct replacement for LP2992AIM5X-1.8?

A: Yes. Both parts share identical electrical specifications: 1.8V output, 250mA current, 0.85V dropout voltage, 95 µA quiescent current, and -40°C to 125°C operating range. The difference is packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) and product status (Active vs. Obsolete). Verify your assembly process accepts the packaging format.

Q: What is the key difference between the three Texas Instruments parametric equivalents?

A: LP2992AIM5-1.8/NOPB and LP2992IM5X-1.8/NOPB are supplied in Cut Tape & Digi-Reel packaging, while LP2992IM5-1.8/NOPB is supplied in Tape & Reel. All three have identical electrical performance and are active products with ROHS3 compliance. Selection depends on your procurement and assembly line compatibility.

Q: Can I use LD2985BM18R if my circuit requires 250mA output?

A: No. The LD2985BM18R is rated for 150mA maximum output current. Using it in a 250mA application exceeds its specification and risks device failure or thermal shutdown. Use only if your actual load current does not exceed 150mA.

Q: What advantage does SPX3819M5-L-1-8/TR offer over the main part?

A: The SPX3819M5-L-1-8/TR provides 500mA output current (versus 250mA), significantly lower quiescent current (8 µA versus 95 µA), and includes reverse polarity protection. Use this part when higher current delivery or lower standby power consumption is required.

Q: Is SPX5205M5-L-1-8/TR suitable for high-temperature applications?

A: The SPX5205M5-L-1-8/TR operates from -40°C to 85°C, which is narrower than the main part's -40°C to 125°C range. Do not use this part if your application requires operation above 85°C.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are RoHS compliant (ROHS3 or RoHS Compliant status), addressing the non-compliance of the obsolete main part. All maintain REACH Unaffected status.

Q: Can I mix packaging formats in the same production run?

A: Packaging format selection (Cut Tape & Digi-Reel, Tape & Reel) depends on your assembly equipment and procurement logistics. Verify compatibility with your pick-and-place system and supplier capabilities before committing to a specific format.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message