LP2992IM5-1.8 Equivalent & Substitute Parts

Part Overview

The LP2992IM5-1.8 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output at 250mA in a SOT-23-5 surface mount package. This part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product portfolio. Alternative equivalent and substitute parts are available to support ongoing production requirements, maintenance applications, and design transitions. Substitute parts are selected based on matching electrical specifications, output voltage, current capacity, package compatibility, and thermal operating range.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	1.8V
Output Current	250mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.85V @ 250mA
Quiescent Current	95 µA
Package Type	SOT-23-5 (SC-74A)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the LP2992IM5-1.8 are categorized based on electrical and mechanical compatibility. The primary substitution criteria are:

Parametric Equivalents maintain identical electrical specifications: 1.8V fixed output, 250mA output current, 16V maximum input voltage, SOT-23-5 package, -40°C to 125°C operating range, and equivalent protection features. These parts are direct functional replacements with no design modifications required.

Manufacturer Recommended Substitutes provide alternative solutions with variations in specific parameters. These parts maintain the 1.8V output voltage, SOT-23-5 package, and core protection features but differ in output current capacity, dropout voltage, quiescent current, or operating temperature range. Selection depends on application current requirements and thermal constraints.

Substitution logic is based on the following allowed parameters:

Output voltage matching (1.8V fixed)
Output current capacity (equal to or greater than 250mA for direct replacement)
Input voltage rating (16V maximum or higher)
Package compatibility (SOT-23-5 / SC-74A)
Operating temperature range (-40°C to 125°C minimum)
Protection feature availability (Over Current, Over Temperature)
Surface mount configuration

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Package	Operating Temp	Product Status	RoHS Status
LP2992IM5-1.8	Texas Instruments	1.8V	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	-40°C to 125°C	Not For New Designs	RoHS Non-Compliant
LP2992AIM5-1.8/NOPB	Texas Instruments	1.8V	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	-40°C to 125°C	Active	RoHS3 Compliant
LP2992IM5-1.8/NOPB	Texas Instruments	1.8V	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	-40°C to 125°C	Active	RoHS3 Compliant
LP2992IM5X-1.8/NOPB	Texas Instruments	1.8V	250mA	16V	0.85V @ 250mA	95 µA	SOT-23-5	-40°C to 125°C	Active	RoHS3 Compliant
LD2985BM18R	STMicroelectronics	1.8V	150mA	16V	0.575V @ 150mA	150 µA	SOT-23-5	-40°C to 125°C	Active	RoHS3 Compliant
SPX3819M5-L-1-8/TR	MaxLinear, Inc.	1.8V	500mA	16V	Not Specified	8 µA	SOT-23-5	-40°C to 125°C	Active	RoHS Compliant
SPX5205M5-L-1-8/TR	MaxLinear, Inc.	1.8V	150mA	16V	Not Specified	5 µA	SOT-23-5	-40°C to 85°C	Active	RoHS Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Replacement)

The LP2992AIM5-1.8/NOPB, LP2992IM5-1.8/NOPB, and LP2992IM5X-1.8/NOPB are direct parametric equivalents to the LP2992IM5-1.8. All three parts maintain identical electrical specifications: 1.8V fixed output, 250mA output current, 0.85V dropout voltage at 250mA, 95 µA quiescent current, and -40°C to 125°C operating range. These parts are manufactured by Texas Instruments and are classified as Active products, indicating ongoing availability and support. All three equivalents are RoHS3 compliant, addressing environmental and regulatory requirements. The primary distinction among these equivalents is packaging format: LP2992AIM5-1.8/NOPB is supplied in Cut Tape & Digi-Reel format, LP2992IM5-1.8/NOPB is supplied in Tape & Reel format, and LP2992IM5X-1.8/NOPB is supplied in Cut Tape & Digi-Reel format. Selection among these three should be based on procurement and assembly requirements.

Manufacturer Recommended Alternatives (Application-Dependent)

The LD2985BM18R from STMicroelectronics is a manufacturer-recommended substitute with identical 1.8V output and -40°C to 125°C operating range. This part differs in output current capacity (150mA versus 250mA) and dropout voltage (0.575V @ 150mA versus 0.85V @ 250mA). The LD2985BM18R is suitable for applications requiring lower output current and benefits from improved dropout voltage performance. This part is RoHS3 compliant and Active status.

The SPX3819M5-L-1-8/TR from MaxLinear, Inc. provides higher output current capacity (500mA) with the same 1.8V output and -40°C to 125°C operating range. This part features significantly lower quiescent current (8 µA versus 95 µA) and includes reverse polarity protection. The SPX3819M5-L-1-8/TR is suitable for applications requiring higher current delivery or lower standby power consumption. This part is RoHS compliant and Active status.

The SPX5205M5-L-1-8/TR from MaxLinear, Inc. provides 150mA output current with 1.8V output. This part features the lowest quiescent current (5 µA) and includes reverse polarity protection. Operating temperature range is -40°C to 85°C, which is narrower than the original part. The SPX5205M5-L-1-8/TR is suitable for applications with lower current requirements and emphasis on low standby power. This part is RoHS compliant and Active status.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LP2992IM5-1.8 with LP2992AIM5-1.8/NOPB?

A: Yes. The LP2992AIM5-1.8/NOPB is a direct parametric equivalent with identical electrical specifications: 1.8V output, 250mA output current, 0.85V dropout voltage, 95 µA quiescent current, and -40°C to 125°C operating range. The primary difference is RoHS compliance status (RoHS3 compliant versus non-compliant on the original). Both use the same SOT-23-5 package. The only consideration is packaging format: LP2992AIM5-1.8/NOPB is supplied in Cut Tape & Digi-Reel format.

Q: What is the difference between LP2992IM5-1.8/NOPB and LP2992IM5X-1.8/NOPB?

A: Both parts are parametric equivalents with identical electrical specifications and RoHS3 compliance. The difference is in packaging format: LP2992IM5-1.8/NOPB is supplied in Tape & Reel format, while LP2992IM5X-1.8/NOPB is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly line requirements and procurement preferences.

Q: Can I use LD2985BM18R as a substitute if my application requires 250mA output?

A: No. The LD2985BM18R has a maximum output current of 150mA, which is insufficient for applications requiring 250mA. This part is suitable only for applications with lower current requirements (150mA or less).

Q: What are the advantages of SPX3819M5-L-1-8/TR over the original LP2992IM5-1.8?

A: The SPX3819M5-L-1-8/TR provides higher output current capacity (500mA versus 250mA), significantly lower quiescent current (8 µA versus 95 µA), and includes reverse polarity protection. These characteristics make it suitable for applications requiring higher current delivery or lower standby power consumption. However, dropout voltage specifications are not provided for this part.

Q: Is SPX5205M5-L-1-8/TR compatible with applications requiring -40°C to 125°C operation?

A: No. The SPX5205M5-L-1-8/TR has an operating temperature range of -40°C to 85°C, which does not extend to 125°C. This part is not suitable for applications requiring the full -40°C to 125°C operating range of the original LP2992IM5-1.8.

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

A: Yes. All substitute parts listed are available in SOT-23-5 package (SC-74A designation), ensuring mechanical and pin compatibility with the original LP2992IM5-1.8.

Q: What is the significance of "Not For New Designs" status on the original LP2992IM5-1.8?

A: "Not For New Designs" indicates that Texas Instruments has superseded this part in their product portfolio. While existing inventory remains available, the manufacturer recommends using active alternatives for new designs. The parametric equivalents (LP2992AIM5-1.8/NOPB, LP2992IM5-1.8/NOPB, LP2992IM5X-1.8/NOPB) are the recommended active alternatives from Texas Instruments.

Q: Do all substitute parts include short circuit protection?

A: The Texas Instruments equivalents (LP2992AIM5-1.8/NOPB, LP2992IM5-1.8/NOPB, LP2992IM5X-1.8/NOPB) include over current, over temperature, and short circuit protection. The LD2985BM18R includes over current and over temperature protection. The MaxLinear parts (SPX3819M5-L-1-8/TR and SPX5205M5-L-1-8/TR) include over current, over temperature, and reverse polarity protection but do not specify short circuit protection.

Q: Which substitute part has the lowest quiescent current?

A: The SPX5205M5-L-1-8/TR has the lowest quiescent current at 5 µA, compared to 95 µA for the original LP2992IM5-1.8. The SPX3819M5-L-1-8/TR has 8 µA quiescent current. These lower values are beneficial for battery-powered or low-power standby applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message