LP2992IM5-1.5/NOPB Equivalent & Substitute Parts

Part Overview

The LP2992IM5-1.5/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a positive fixed output regulator delivering 250mA at 1.5V. This device is designed for low-noise, micropower applications requiring stable voltage regulation in compact surface-mount packages. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Substiute Parts

LP2992IM5-1.5/NOPB

Texas InstrumentsIn Stock: 3537LP2992IM5-1.5/NOPB Datasheet

Current PartRFQ

TPS7A2401DBVR

Texas InstrumentsIn Stock: 19846TPS7A2401DBVR Datasheet

MFR RecommendedRFQ

LP2992AIM5-1.5/NOPB

National SemiconductorIn Stock: 2275LP2992AIM5-1.5/NOPB Datasheet

Parametric EquivalentRFQ

LP2992AIM5X-1.5/NOPB

National SemiconductorIn Stock: 1795LP2992AIM5X-1.5/NOPB Datasheet

Parametric EquivalentRFQ

LP2992IM5X-1.5/NOPB

Texas InstrumentsIn Stock: 1188LP2992IM5X-1.5/NOPB Datasheet

Parametric EquivalentRFQ

SPX3819M5-L-1-5/TR

MaxLinear, Inc.In Stock: 22964SPX3819M5-L-1-5/TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2992IM5-1.5/NOPB are categorized based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Package compatibility: SOT-23-5 (SC-74A, SOT-753)
• Output voltage: 1.5V fixed output
• Output current capability: minimum 250mA
• Maximum input voltage: 16V or greater
• Operating temperature range: -40°C to 125°C
• Mounting type: Surface Mount
• Control features: Enable function
• Protection features: Over Current, Over Temperature

Substitution Categories:

Parametric Equivalents maintain identical electrical specifications and fixed 1.5V output, differing only in manufacturer or product status.

Manufacturer Recommended Substitute offers enhanced performance characteristics (lower quiescent current, improved PSRR, lower dropout voltage) with adjustable output capability, requiring design verification for fixed 1.5V configuration.

Enhanced Current Capacity Substitute provides higher output current (500mA vs. 250mA) in the same package, maintaining fixed 1.5V output and compatible protection features.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

LP2992AIM5-1.5/NOPB and LP2992AIM5X-1.5/NOPB are parametric equivalents with active product status, making them suitable for direct substitution. Both maintain identical electrical performance and fixed 1.5V output. LP2992IM5X-1.5/NOPB is also a direct equivalent from Texas Instruments with Last Time Buy status, providing continuity from the same manufacturer.

For Enhanced Performance with Design Consideration:

TPS7A2401DBVR is the manufacturer-recommended substitute from Texas Instruments. This part features significantly lower quiescent current (4.5 µA vs. 95 µA), superior PSRR (75dB ~ 62dB vs. 45dB), and lower dropout voltage (0.25V vs. 0.85V). However, it is an adjustable output regulator requiring external resistor network configuration to achieve fixed 1.5V output. Output current is 200mA, which is below the 250mA specification of the main part. This substitute is suitable only when design modifications are acceptable and lower quiescent current is beneficial.

For Higher Current Applications:

SPX3819M5-L-1-5/TR from MaxLinear provides double the output current (500mA vs. 250mA) while maintaining fixed 1.5V output in the same SOT-23-5 package. Quiescent current is significantly lower (8 µA vs. 95 µA). This part is active and RoHS compliant, making it suitable for applications requiring higher current capacity without design changes.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance or equivalent RoHS compliance status. Operating temperature ranges are consistent across all parts (-40°C to 125°C). All parts are surface-mount compatible with identical package specifications.

Frequently Asked Questions (FAQ)

Q: Can LP2992AIM5-1.5/NOPB be used as a direct replacement for LP2992IM5-1.5/NOPB?

A: Yes. LP2992AIM5-1.5/NOPB is a parametric equivalent with identical electrical specifications, fixed 1.5V output, 250mA output current, and SOT-23-5 package. The part is currently active, providing better long-term availability than the obsolete main part.

Q: What is the difference between LP2992IM5X-1.5/NOPB and LP2992IM5-1.5/NOPB?

A: Both parts are electrically identical with the same specifications. LP2992IM5X-1.5/NOPB has Last Time Buy status, indicating limited future availability. Both are from Texas Instruments and use the same SOT-23-5 package.

Q: Why is TPS7A2401DBVR listed as a manufacturer-recommended substitute if it has lower output current?

A: TPS7A2401DBVR is recommended by Texas Instruments as a forward-looking alternative due to superior performance characteristics: 95% lower quiescent current, 30dB higher PSRR, and 70% lower dropout voltage. However, it requires external resistor configuration for fixed 1.5V output and delivers 200mA instead of 250mA. This substitute is appropriate only when design modifications are feasible and performance improvements are beneficial.

Q: Can SPX3819M5-L-1-5/TR be used in place of LP2992IM5-1.5/NOPB?

A: Yes, with the advantage of higher output current capacity. SPX3819M5-L-1-5/TR maintains fixed 1.5V output and SOT-23-5 package compatibility. It provides 500mA output current (double the main part) and significantly lower quiescent current (8 µA vs. 95 µA). No design modifications are required for direct substitution.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the SC-74A, SOT-753 package designation, which is the SOT-23-5 surface-mount package. Pin configuration and footprint compatibility are maintained across all listed substitutes.

Q: What protection features are included in these regulators?

A: The main part and most parametric equivalents include Over Current Protection (OCP), Over Temperature Protection (OTP), and Short Circuit Protection (SCP). TPS7A2401DBVR includes OCP, OTP, and Under Voltage Lockout (UVLO). SPX3819M5-L-1-5/TR includes OCP, OTP, and Reverse Polarity protection. All provide comprehensive protection for typical applications.

Q: Which substitute offers the best quiescent current performance?

A: TPS7A2401DBVR has the lowest quiescent current at 4.5 µA, followed by SPX3819M5-L-1-5/TR at 8 µA. The main part and parametric equivalents operate at 95 µA. Lower quiescent current is beneficial in battery-powered or always-on applications where standby power consumption is critical.

Q: Are all parts RoHS compliant?

A: Yes. The main part is ROHS3 compliant. LP2992AIM5-1.5/NOPB, LP2992AIM5X-1.5/NOPB, LP2992IM5X-1.5/NOPB, and TPS7A2401DBVR are ROHS3 compliant. SPX3819M5-L-1-5/TR is RoHS compliant. All meet environmental compliance requirements for current manufacturing standards.