LP2985IM5-6.1/NOPB Equivalent & Substitute Parts

Part Overview

The LP2985IM5-6.1/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 150mA output current with a fixed 6.1V output and operates across the -40°C to 125°C temperature range. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

LP2985IM5-6.1/NOPB

Texas InstrumentsIn Stock: 5594LP2985IM5-6.1/NOPB Datasheet

Current PartRFQ

TPS7A2401DBVR

Texas InstrumentsIn Stock: 19846TPS7A2401DBVR Datasheet

MFR RecommendedRFQ

LP2985AIM5-6.1/NOPB

Texas InstrumentsIn Stock: 9718LP2985AIM5-6.1/NOPB Datasheet

Parametric EquivalentRFQ

LP2985AIM5X-6.1/NOPB

Texas InstrumentsIn Stock: 3340LP2985AIM5X-6.1/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2985IM5-6.1/NOPB is determined by the following critical parameters:

• Package Compatibility: SOT-23-5 (SC-74A, SOT-753) surface mount package
• Output Configuration: Positive polarity
• Fixed Output Voltage: 6.1V
• Output Current Capability: Minimum 150mA
• Input Voltage Range: Support for up to 16V maximum input
• Dropout Voltage: Maximum 0.58V @ 150mA
• Temperature Range: -40°C to 125°C operation
• Control Features: Enable function
• Protection: Over Current, Over Temperature, Short Circuit protection
• Compliance: ROHS3 Compliant, REACH Unaffected

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and functional alternatives (different output type but compatible package and protection features).

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalents (Recommended for Direct Replacement)

LP2985AIM5X-6.1/NOPB is the preferred parametric equivalent. This part maintains identical electrical specifications to the LP2985IM5-6.1/NOPB while offering active product status, ensuring long-term availability and manufacturing support. All critical parameters including fixed 6.1V output, 150mA current capability, 0.58V dropout voltage, and protection features remain unchanged. The SOT-23-5 package provides direct pin-for-pin compatibility.

LP2985AIM5-6.1/NOPB provides identical electrical performance but carries obsolete product status, limiting its suitability for new designs despite current inventory availability.

Functional Alternative (For Adjustable Output Applications)

TPS7A2401DBVR serves as a functional alternative when design flexibility is required. This part offers adjustable output voltage (1.24V to 17.75V), allowing 6.1V configuration through external resistor networks. Key advantages include higher output current (200mA versus 150mA), lower dropout voltage (0.25V @ 200mA), superior quiescent current (4.5 µA versus 95 µA), and enhanced PSRR performance (75dB ~ 62dB). The part maintains SOT-23-5 package compatibility and active product status. Additional protection via Under Voltage Lockout (UVLO) provides enhanced system reliability. This option requires circuit redesign to accommodate adjustable output configuration.

Frequently Asked Questions (FAQ)

Q: Can LP2985AIM5X-6.1/NOPB be used as a direct replacement for LP2985IM5-6.1/NOPB?

A: Yes. LP2985AIM5X-6.1/NOPB is a parametric equivalent with identical electrical specifications, package type (SOT-23-5), and pin configuration. The primary difference is active product status, ensuring continued manufacturing and supply chain support.

Q: What are the key differences between the LP2985 series and TPS7A2401DBVR?

A: The LP2985 series provides fixed 6.1V output with 150mA current capability. TPS7A2401DBVR offers adjustable output voltage (1.24V to 17.75V) with 200mA current capability. Both share SOT-23-5 packaging and surface mount compatibility. TPS7A2401DBVR features lower quiescent current (4.5 µA), lower dropout voltage (0.25V @ 200mA), and UVLO protection. Selection depends on whether fixed or adjustable output voltage is required.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. LP2985AIM5-6.1/NOPB, LP2985AIM5X-6.1/NOPB, and TPS7A2401DBVR are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status.

Q: What is the impact of product status (Obsolete vs. Active) on part selection?

A: Active product status (LP2985AIM5X-6.1/NOPB and TPS7A2401DBVR) ensures ongoing manufacturing, quality assurance, and supply chain availability. Obsolete parts (LP2985IM5-6.1/NOPB and LP2985AIM5-6.1/NOPB) may face limited availability and no future manufacturing support. For new designs, active parts are recommended.

Q: Can TPS7A2401DBVR be configured to output 6.1V?

A: TPS7A2401DBVR supports adjustable output voltage from 1.24V to 17.75V. Achieving 6.1V output requires external resistor network configuration. This approach introduces additional component count and circuit complexity compared to fixed-output alternatives.

Q: Are there packaging differences between substitute parts?

A: All substitute parts use identical SOT-23-5 (SC-74A, SOT-753) surface mount packaging. Packaging differences exist only in supplier delivery format: LP2985IM5-6.1/NOPB and LP2985AIM5-6.1/NOPB use Tape & Reel (TR), while LP2985AIM5X-6.1/NOPB uses Tape & Reel (TR), and TPS7A2401DBVR uses Cut Tape (CT) & Digi-Reel®. These differences do not affect circuit board assembly compatibility.