LP2992IM5X-1.8 Equivalent & Substitute Parts

Part Overview

The LP2992IM5X-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 necessary for ongoing design support and production continuity. Substitute parts maintain the same output voltage, package form factor, and core functionality while offering improved availability and compliance status.

Substiute Parts

LP2992IM5X-1.8

Texas InstrumentsIn Stock: 5595LP2992IM5X-1.8 Datasheet

Current PartRFQ

LP2992IM5X-1.8/NOPB

Texas InstrumentsIn Stock: 1549LP2992IM5X-1.8/NOPB Datasheet

DirectRFQ

LP2992AIM5-1.8/NOPB

Texas InstrumentsIn Stock: 1294LP2992AIM5-1.8/NOPB Datasheet

Parametric EquivalentRFQ

LP2992IM5-1.8/NOPB

Texas InstrumentsIn Stock: 2145LP2992IM5-1.8/NOPB Datasheet

Parametric EquivalentRFQ

LD2985BM18R

STMicroelectronicsIn Stock: 17814LD2985BM18R Datasheet

MFR RecommendedRFQ

SPX3819M5-L-1-8/TR

MaxLinear, Inc.In Stock: 605499SPX3819M5-L-1-8/TR Datasheet

MFR RecommendedRFQ

SPX5205M5-L-1-8/TR

MaxLinear, Inc.In Stock: 92110SPX5205M5-L-1-8/TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2992IM5X-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)
• Mounting type: Surface Mount
• Input voltage rating: 16V maximum
• Operating temperature range: -40°C to 125°C minimum
• Output configuration: Positive, Fixed

Substitution Categories:

Direct Equivalents (Texas Instruments LP2992 Series): Parts LP2992IM5X-1.8/NOPB, LP2992AIM5-1.8/NOPB, and LP2992IM5-1.8/NOPB maintain identical electrical specifications and package form factor. These differ only in product status (Active vs. Obsolete) and RoHS compliance.

Parametric Equivalents (Alternative Manufacturers): Parts LD2985BM18R (STMicroelectronics), SPX3819M5-L-1-8/TR, and SPX5205M5-L-1-8/TR (MaxLinear, Inc.) provide the same 1.8V output in SOT-23-5 packaging with compatible operating parameters. These parts differ in output current capability and quiescent current specifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): LP2992IM5X-1.8/NOPB, LP2992AIM5-1.8/NOPB, and LP2992IM5-1.8/NOPB are the primary substitutes. All three maintain the 250mA output current and 0.85V dropout specification of the original part. LP2992IM5X-1.8/NOPB and LP2992IM5-1.8/NOPB are available in higher quantities (1473 Pcs and 2100 Pcs respectively) and carry Active product status with ROHS3 compliance, making them suitable for new designs and production continuity.

For Current-Limited Applications (150mA Maximum): LD2985BM18R (STMicroelectronics) and SPX5205M5-L-1-8/TR (MaxLinear, Inc.) are suitable where output current requirements do not exceed 150mA. LD2985BM18R offers improved dropout performance (0.575V @ 150mA) and higher quiescent current (150 µA). SPX5205M5-L-1-8/TR provides lower quiescent current (5 µA) but operates only to 85°C maximum temperature. Both carry RoHS compliance and Active product status.

For Higher Current Applications (500mA Capability): SPX3819M5-L-1-8/TR (MaxLinear, Inc.) supports 500mA output current in the same SOT-23-5 package. This part features significantly lower quiescent current (8 µA) and includes reverse polarity protection. SPX3819M5-L-1-8/TR is available in large quantities (605400 Pcs) and carries RoHS compliance with Active product status.

Compliance Considerations: All substitute parts listed carry either ROHS3 or RoHS compliance, addressing the non-compliant status of the obsolete LP2992IM5X-1.8. Selection should prioritize Active product status parts for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can LP2992IM5X-1.8/NOPB be used as a direct replacement for LP2992IM5X-1.8? A: Yes. LP2992IM5X-1.8/NOPB is a direct equivalent with identical electrical specifications (1.8V output, 250mA current, 0.85V dropout). The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). The "/NOPB" suffix indicates lead-free packaging.

Q: What is the difference between LP2992IM5-1.8/NOPB and LP2992IM5X-1.8/NOPB? A: Both parts are functionally equivalent with identical electrical specifications and SOT-23-5 packaging. The difference lies in packaging format: LP2992IM5X-1.8/NOPB is available in Cut Tape (CT) & Digi-Reel format, while LP2992IM5-1.8/NOPB is supplied in Tape & Reel (TR) format. Selection depends on assembly line requirements.

Q: Can LD2985BM18R replace LP2992IM5X-1.8 in all applications? A: LD2985BM18R is suitable only for applications requiring 150mA or less output current. The original LP2992IM5X-1.8 supports 250mA. LD2985BM18R offers superior dropout performance (0.575V vs. 0.85V) and maintains the same 1.8V output voltage and SOT-23-5 package. Verify current requirements before substitution.

Q: What are the advantages of SPX3819M5-L-1-8/TR over the LP2992 series? A: SPX3819M5-L-1-8/TR provides 500mA output current (double the LP2992IM5X-1.8 specification) in the same SOT-23-5 package. It features significantly lower quiescent current (8 µA vs. 95 µA), reducing standby power consumption. It includes reverse polarity protection and is available in large quantities. Trade-off: dropout voltage is not specified in available data.

Q: Is SPX5205M5-L-1-8/TR suitable for high-temperature applications? A: SPX5205M5-L-1-8/TR operates to a maximum of 85°C, compared to 125°C for LP2992IM5X-1.8 and other substitutes. This part is not suitable for applications requiring the full -40°C to 125°C temperature range. Verify operating temperature requirements before selection.

Q: Do all substitute parts use the same SOT-23-5 package? A: Yes. All substitute parts listed use SC-74A/SOT-753 package designation with SOT-23-5 supplier device package. They are pin-compatible and suitable for direct PCB replacement without layout modifications.

Q: Which substitute offers the best RoHS compliance status? A: All substitute parts carry either ROHS3 Compliant or RoHS Compliant status. The original LP2992IM5X-1.8 is RoHS non-compliant. For new designs requiring RoHS compliance, any of the listed substitutes are acceptable.