LP2985IM5-5.7/NOPB Equivalent & Substitute Parts

Part Overview

The LP2985IM5-5.7/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 5.7V output and operates across an input voltage range up to 16V. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

LP2985IM5-5.7/NOPB

Texas InstrumentsIn Stock: 2067LP2985IM5-5.7/NOPB Datasheet

Current PartRFQ

TPS7A2401DBVR

Texas InstrumentsIn Stock: 19846TPS7A2401DBVR Datasheet

MFR RecommendedRFQ

LP2985AIM5-5.7/NOPB

Texas InstrumentsIn Stock: 2478LP2985AIM5-5.7/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2985IM5-5.7/NOPB is determined by the following critical parameters:

• Package compatibility: SOT-23-5 form factor (SC-74A, SOT-753)
• Output voltage requirement: 5.7V fixed output
• Current capacity: Minimum 150mA output current
• Input voltage tolerance: Maximum 16V input
• Operating temperature range: -40°C ~ 125°C
• Surface mount configuration
• Positive output configuration

Two substitute parts are identified based on these criteria:

1. LP2985AIM5-5.7/NOPB — Parametric equivalent with identical electrical specifications and packaging, differing only in tape & reel packaging format
2. TPS7A2401DBVR — Manufacturer-recommended substitute with enhanced performance characteristics and active product status

Parameter Comparison

Engineering Selection Recommendations

LP2985AIM5-5.7/NOPB is the direct parametric equivalent for the obsolete LP2985IM5-5.7/NOPB. Both devices share identical electrical specifications, output voltage, current capacity, and operating characteristics. The only distinction is packaging format: the main part uses cut tape (CT) & Digi-Reel® while the equivalent uses tape & reel (TR). Both maintain active product status with ROHS3 compliance and unlimited moisture sensitivity rating. This substitute is appropriate for direct replacement in applications requiring fixed 5.7V output at 150mA.

TPS7A2401DBVR is the manufacturer-recommended substitute offering enhanced performance characteristics. While this device features adjustable output voltage (1.24V ~ 17.75V), it can be configured for fixed 5.7V output through external resistor networks. The TPS7A2401DBVR provides superior specifications including higher input voltage tolerance (18V maximum), increased output current (200mA), significantly lower dropout voltage (0.25V @ 200mA), reduced quiescent current (4.5 µA), and improved PSRR (75dB ~ 62dB). This device includes Under Voltage Lockout (UVLO) protection in addition to standard protection features. The TPS7A2401DBVR maintains active product status and full compliance certifications. Selection of this substitute is appropriate for new designs or applications where enhanced performance margins are beneficial.

Frequently Asked Questions (FAQ)

Q: Can LP2985AIM5-5.7/NOPB be used as a direct replacement for LP2985IM5-5.7/NOPB?

A: Yes. The LP2985AIM5-5.7/NOPB is a parametric equivalent with identical electrical specifications, output voltage, current rating, and operating temperature range. Both devices use the same SOT-23-5 package. The difference is packaging format (cut tape versus tape & reel), which does not affect electrical performance or PCB integration.

Q: What are the advantages of using TPS7A2401DBVR over LP2985AIM5-5.7/NOPB?

A: The TPS7A2401DBVR offers several performance improvements: lower dropout voltage (0.25V versus 0.58V), higher output current capability (200mA versus 150mA), significantly lower quiescent current (4.5 µA versus 95 µA), superior PSRR performance, and higher input voltage tolerance (18V versus 16V). Additionally, the TPS7A2401DBVR is adjustable, allowing configuration flexibility for different output voltages if required in future design iterations.

Q: Does TPS7A2401DBVR require external components to achieve 5.7V fixed output?

A: The TPS7A2401DBVR is an adjustable regulator. To configure it for fixed 5.7V output, external resistor networks are required. The specific resistor values depend on the device's feedback network design. Consult the TPS7A2401DBVR datasheet for resistor selection calculations and reference designs.

Q: Are all three parts compatible with the same PCB layout?

A: All three parts use the SOT-23-5 package (SC-74A, SOT-753), ensuring identical pinout and footprint compatibility. PCB layout modifications are not required for substitution between these devices. However, if using the TPS7A2401DBVR with fixed output configuration, additional PCB space may be needed for external resistor networks.

Q: What is the product status difference between the main part and substitutes?

A: The LP2985IM5-5.7/NOPB is classified as obsolete, indicating discontinued manufacturing and limited availability. Both LP2985AIM5-5.7/NOPB and TPS7A2401DBVR maintain active product status with ongoing manufacturing and full supplier support, ensuring long-term availability and design continuity.

Q: Are all parts RoHS compliant?

A: Yes. All three parts—LP2985IM5-5.7/NOPB, LP2985AIM5-5.7/NOPB, and TPS7A2401DBVR—are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity). All parts are REACH unaffected and classified under ECCN EAR99.