LP2985AIM5X-3.8 Equivalent & Substitute Parts

Part Overview

The LP2985AIM5X-3.8 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This Surface Mount device delivers 150mA output current with a fixed 3.8V 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 and procurement planning.

Substiute Parts

LP2985AIM5X-3.8

Texas InstrumentsIn Stock: 112814LP2985AIM5X-3.8 Datasheet

Current PartRFQ

LP2985AIM5-3.8/NOPB

Texas InstrumentsIn Stock: 1715LP2985AIM5-3.8/NOPB Datasheet

Parametric EquivalentRFQ

LP2985AIM5X-3.8/NOPB

Texas InstrumentsIn Stock: 7108LP2985AIM5X-3.8/NOPB Datasheet

Parametric EquivalentRFQ

LP2985IM5-3.8/NOPB

Texas InstrumentsIn Stock: 2853LP2985IM5-3.8/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2985AIM5X-3.8 is determined by strict electrical and mechanical parameter matching. The following criteria define valid equivalents:

• Fixed output voltage of 3.8V
• Positive output configuration
• 150mA output current capability
• Maximum input voltage of 16V
• Voltage dropout of 0.58V @ 150mA
• Quiescent current of 95 µA
• Enable control feature
• Over Current, Over Temperature, and Short Circuit protection
• SOT-23-5 package (SC-74A, SOT-753)
• Surface Mount mounting type
• Operating temperature range -40°C ~ 125°C

All identified substitute parts maintain these electrical specifications and package requirements, ensuring functional and mechanical compatibility in existing designs.

Parameter Comparison

Engineering Selection Recommendations

For designs currently using the LP2985AIM5X-3.8, the following substitution strategy is recommended based on product status and compliance requirements:

Primary Recommendation: LP2985IM5-3.8/NOPB is the preferred substitute. This part maintains Active product status, ensuring long-term availability and support. It carries ROHS3 compliance, meeting modern environmental standards. The Cut Tape & Digi-Reel® packaging option provides flexibility for both prototype and production volumes.

Secondary Recommendation: LP2985AIM5-3.8/NOPB offers Active status with Tape & Reel packaging suitable for high-volume automated assembly. ROHS3 compliance is maintained.

Transitional Option: LP2985AIM5X-3.8/NOPB carries Last Time Buy status, indicating limited future availability. This part is suitable only for near-term production requirements where inventory can be secured before discontinuation.

All three substitute parts deliver identical electrical performance and maintain the SOT-23-5 package specification, ensuring direct functional replacement without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can LP2985AIM5X-3.8 be directly replaced with LP2985IM5-3.8/NOPB?

A: Yes. Both parts deliver identical electrical specifications including 3.8V fixed output, 150mA output current, 0.58V maximum dropout voltage, and SOT-23-5 package. The primary difference is product status and RoHS compliance level. LP2985IM5-3.8/NOPB is Active and ROHS3 compliant, making it the recommended long-term substitute.

Q: What is the difference between the packaging options?

A: LP2985AIM5-3.8/NOPB is supplied in Tape & Reel (TR) format, optimized for automated pick-and-place assembly in production environments. LP2985IM5-3.8/NOPB is available in Cut Tape (CT) & Digi-Reel® format, providing flexibility for both prototype and production quantities. LP2985AIM5X-3.8/NOPB uses Cut Tape (CT) packaging. All three maintain identical electrical performance and SOT-23-5 package dimensions.

Q: Why is the original part marked Obsolete?

A: The LP2985AIM5X-3.8 has reached end-of-life status. Texas Instruments continues to offer functionally equivalent alternatives with Active product status, ensuring design continuity and supply chain reliability.

Q: Are there any compliance differences between substitutes?

A: The original LP2985AIM5X-3.8 is RoHS non-compliant. All three substitute parts (LP2985AIM5-3.8/NOPB, LP2985AIM5X-3.8/NOPB, and LP2985IM5-3.8/NOPB) are ROHS3 compliant. For applications requiring RoHS compliance, any of the three substitutes is suitable. All parts maintain REACH Unaffected status.

Q: Can substitutes be used interchangeably in existing PCB designs?

A: Yes. All substitute parts use the identical SOT-23-5 package (SC-74A, SOT-753) with matching pin configuration and electrical specifications. No PCB layout modifications are required for substitution.

Q: Which substitute should be selected for new designs?

A: LP2985IM5-3.8/NOPB is recommended for new designs. It maintains Active product status, ensuring availability throughout the design lifecycle, and carries ROHS3 compliance for regulatory alignment.