LP2992IM5X-3.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP2992IM5X-3.0/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output at 250mA in a SOT-23-5 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The device provides regulated 3V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for low-power applications requiring stable voltage regulation.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP2992IM5X-3.0/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	3V
Output Current	250mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.85V @ 250mA
Quiescent Current	95 µA
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Operating Temperature Range	-40°C ~ 125°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP2992IM5X-3.0/NOPB are categorized based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Output voltage: 3V fixed
Package type: SOT-23-5 (SC-74A, SOT-753)
Output configuration: Positive
Surface mount mounting type
Operating temperature range: -40°C ~ 125°C minimum
Input voltage tolerance: 16V maximum or higher
Protection features: Over-current, over-temperature, short-circuit

Substitution Categories:

Category 1 - Direct Parametric Equivalents (250mA Output Current): Parts with identical 250mA output current rating and matching electrical specifications. These provide direct pin-compatible replacement with equivalent performance characteristics.

Category 2 - Reduced Current Equivalents (150mA Output Current): Parts with lower output current rating (150mA) but identical 3V output voltage and SOT-23-5 package. These are suitable for applications where the 250mA requirement can be reduced without functional impact.

Category 3 - Enhanced Current Equivalents (300mA-500mA Output Current): Parts with higher output current capability (300mA to 500mA) while maintaining 3V output and SOT-23-5 package. These provide increased current headroom for demanding applications.

Category 4 - Reduced Input Voltage Equivalents (10V Maximum Input): Parts with lower maximum input voltage (10V) but matching 250mA output current and 3V output. These are suitable only for applications with input voltage limited to 10V or below.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Package	Product Status	Operating Temp
LP2992IM5X-3.0/NOPB	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	Obsolete	-40°C ~ 125°C
LP2992IM5-3.0/NOPB	Texas Instruments	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	Active	-40°C ~ 125°C
LP2985-30DBVR	Texas Instruments	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	-40°C ~ 125°C
LP2985-30DBVT	Texas Instruments	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Last Time Buy	-40°C ~ 125°C
LP2985A-30DBVR	Texas Instruments	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	-40°C ~ 125°C
LP2985A-30DBVT	Texas Instruments	150mA	16V	0.58V @ 150mA	95 µA	SOT-23-5	Active	-40°C ~ 125°C
REG102NA-3/250	Texas Instruments	250mA	10V	0.27V @ 250mA	500 µA	SOT-23-5	Last Time Buy	-40°C ~ 85°C
REG102NA-3/3K	Texas Instruments	250mA	10V	0.27V @ 250mA	500 µA	SOT-23-5	Last Time Buy	-40°C ~ 85°C
AP2210K-3.0TRG1	Diodes Incorporated	300mA	13.2V	0.5V @ 300mA	180 µA	SOT-23-5	Active	-40°C ~ 125°C
LD2985BM30R	STMicroelectronics	150mA	16V	0.575V @ 150mA	150 µA	SOT-23-5	Active	-40°C ~ 125°C
SPX3819M5-L-3-0/TR	MaxLinear, Inc.	500mA	16V	0.7V @ 500mA	8 µA	SOT-23-5	Active	-40°C ~ 125°C

Engineering Selection Recommendations

Recommended Primary Substitute: LP2992IM5-3.0/NOPB

The LP2992IM5-3.0/NOPB is the optimal substitute for the obsolete LP2992IM5X-3.0/NOPB. This part maintains identical electrical specifications including 250mA output current, 16V maximum input voltage, 0.85V dropout voltage, and 95 µA quiescent current. The device is in active product status, ensuring long-term availability and supply chain stability. Both parts share the SOT-23-5 package and identical operating temperature range (-40°C ~ 125°C). ROHS3 compliance is maintained. This substitution requires no circuit modifications and provides direct pin-compatible replacement.

Secondary Substitutes for Current-Reduced Applications:

The LP2985 series (LP2985-30DBVR, LP2985-30DBVT, LP2985A-30DBVR, LP2985A-30DBVT) from Texas Instruments are suitable when application current requirements do not exceed 150mA. These parts maintain 3V output voltage, 16V maximum input voltage, and SOT-23-5 package compatibility. The LP2985A variants are in active product status, providing superior long-term availability compared to the LP2985-30DBVT (Last Time Buy status). Dropout voltage is improved at 0.58V compared to the original 0.85V. The LD2985BM30R from STMicroelectronics provides equivalent 150mA performance with 16V input tolerance and active product status.

Enhanced Current Substitute: SPX3819M5-L-3-0/TR

The SPX3819M5-L-3-0/TR from MaxLinear provides 500mA output current while maintaining 3V output voltage, 16V maximum input voltage, and SOT-23-5 package. This part is in active product status and offers significantly lower quiescent current (8 µA) compared to the original 95 µA, beneficial for battery-powered applications. This substitute is suitable for designs requiring higher current capability than the original 250mA specification.

Alternative with Enhanced Current: AP2210K-3.0TRG1

The AP2210K-3.0TRG1 from Diodes Incorporated provides 300mA output current with 3V output voltage and SOT-23-5 package. Maximum input voltage is 13.2V, which is lower than the original 16V specification. This part is in active product status and includes reverse polarity protection. Selection of this part requires verification that input voltage does not exceed 13.2V.

Reduced Input Voltage Substitutes: REG102NA-3/250 and REG102NA-3/3K

The REG102NA series maintains 250mA output current and 3V output voltage in SOT-23-5 package but limits maximum input voltage to 10V. Both parts are in Last Time Buy status, indicating limited future availability. Operating temperature range is reduced to -40°C ~ 85°C. These parts are suitable only for applications with input voltage constrained to 10V or below and operating temperatures not exceeding 85°C.

Frequently Asked Questions (FAQ)

Q: Can LP2985 series parts (150mA) directly replace the LP2992IM5X-3.0/NOPB (250mA)?

A: LP2985 series parts are pin-compatible and electrically compatible for applications where output current does not exceed 150mA. If your circuit requires the full 250mA capability, these parts are not suitable. Verify your actual current requirements before substitution.

Q: What is the difference between LP2985-30DBVR and LP2985A-30DBVR?

A: Both parts provide identical electrical specifications (150mA output, 3V output, 16V input maximum, 0.58V dropout). The primary difference is product status: LP2985A-30DBVR is in active status with long-term availability, while LP2985-30DBVR is also active. Both are suitable for new designs. The LP2985-30DBVT variant is in Last Time Buy status and should be avoided for new designs.

Q: Why would I choose SPX3819M5-L-3-0/TR over LP2992IM5-3.0/NOPB?

A: The SPX3819M5-L-3-0/TR provides 500mA output current compared to 250mA, offering increased current headroom for demanding applications. It also features significantly lower quiescent current (8 µA vs. 95 µA), making it superior for battery-powered or low-power standby applications. Select this part only if your design benefits from higher current capability or lower quiescent current consumption.

Q: Are REG102NA parts suitable for new designs?

A: REG102NA-3/250 and REG102NA-3/3K are both in Last Time Buy status, indicating limited future availability. These parts should not be selected for new designs. Use LP2992IM5-3.0/NOPB or other active-status alternatives instead.

Q: What is the impact of different dropout voltages on my circuit?

A: Dropout voltage determines the minimum input-to-output voltage differential required for regulation. The original LP2992IM5X-3.0/NOPB has 0.85V dropout at 250mA. Substitutes with lower dropout voltage (such as LP2985 series at 0.58V) allow operation with lower input voltages. Substitutes with higher dropout voltage require higher input voltage headroom. Verify your input voltage range is compatible with the selected part's dropout specification.

Q: Is the AP2210K-3.0TRG1 suitable if my input voltage reaches 16V?

A: No. The AP2210K-3.0TRG1 has a maximum input voltage of 13.2V. If your circuit requires 16V input tolerance, select LP2992IM5-3.0/NOPB, LP2985 series, LD2985BM30R, or SPX3819M5-L-3-0/TR instead.

Q: Can I use SPX3819M5-L-3-0/TR in a circuit designed for 250mA output?

A: Yes. The SPX3819M5-L-3-0/TR provides 500mA output capability, which exceeds the 250mA requirement. It is pin-compatible and electrically compatible with the original design. No circuit modifications are required. This substitution provides additional current margin for future design enhancements.

Q: What packaging options are available for these substitutes?

A: All listed substitute parts use the SOT-23-5 package (SC-74A, SOT-753). Packaging variants differ in tape format: Cut Tape (CT), Tape & Reel (TR), or Cut Tape & Digi-Reel combinations. These are supply chain variants of the same physical package and do not affect electrical compatibility. Select based on your procurement and assembly requirements.

Q: Are all these parts RoHS compliant?

A: All listed parts are RoHS compliant. LP2992IM5-3.0/NOPB, LP2985 series, REG102NA series, LD2985BM30R, and SPX3819M5-L-3-0/TR are ROHS3 compliant. AP2210K-3.0TRG1 is RoHS compliant. All parts meet environmental compliance requirements for current manufacturing standards.

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