LP3893ES-1.2 Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The LP3893ES-1.2 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device provides a fixed positive 1.2V output at 3A maximum current in a TO-263 (DDPAK-5) surface mount package. The main part number LP3893ES-1.2 currently holds Last Time Buy status, making identification of active equivalent and substitute parts essential for ongoing design support and procurement planning. Substitute parts maintain identical or superior electrical performance while offering continued availability through active product lines.

Substiute Parts

LP3893ES-1.2

Texas InstrumentsIn Stock: 4489LP3893ES-1.2 Datasheet

Current PartRFQ

LP3893ES-1.2/NOPB

Texas InstrumentsIn Stock: 1372LP3893ES-1.2/NOPB Datasheet

DirectRFQ

LP38856S-1.2/NOPB

Texas InstrumentsIn Stock: 52714LP38856S-1.2/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP3893ES-1.2 are classified into two categories based on electrical and mechanical compatibility:

Direct Manufacturer Substitute (LP3893ES-1.2/NOPB): This part maintains identical electrical specifications and package configuration. The primary distinction is product status transition from Last Time Buy to Active, ensuring continued supply availability. All key parameters—output voltage, current rating, input voltage limits, dropout voltage, protection features, operating temperature range, and package type—remain unchanged.

Parametric Equivalent (LP38856S-1.2/NOPB): This part provides functional equivalence with measurable performance improvements in specific parameters. The output voltage (1.2V), output current (3A), input voltage maximum (5.5V), output configuration (positive fixed), package type (TO-263 DDPAK-5), protection features, operating temperature range, and compliance certifications remain identical. The key differences are reduced dropout voltage (0.45V @ 3A versus 1V @ 1A) and increased quiescent current (300 µA versus 30 µA), representing a modern enhancement to the original design with superior load regulation characteristics.

Substitution eligibility is determined by matching: fixed output voltage, output current capacity, input voltage rating, package/case type, mounting method, and protection feature set.

Parameter Comparison

Engineering Selection Recommendations

For Last Time Buy Mitigation: LP3893ES-1.2/NOPB serves as the direct replacement, maintaining identical electrical and mechanical specifications while transitioning to Active product status. This part is suitable for designs requiring no performance modification and ensures continuity with existing board layouts and thermal management designs.

For Performance Enhancement: LP38856S-1.2/NOPB provides improved dropout voltage performance (0.45V @ 3A versus 1V @ 1A), beneficial in applications with tight input voltage margins or high current draw scenarios. This part is also Active status and maintains full compliance with RoHS3 and REACH requirements. The increased quiescent current (300 µA versus 30 µA) should be evaluated in battery-powered or ultra-low-power applications where standby current is critical.

Both substitute parts are manufactured by Texas Instruments, carry identical MSL ratings, and maintain the same package footprint and thermal characteristics as the original LP3893ES-1.2.

Frequently Asked Questions (FAQ)

Q: Can LP3893ES-1.2/NOPB be used as a direct replacement for LP3893ES-1.2?

A: Yes. LP3893ES-1.2/NOPB is a direct manufacturer substitute with identical electrical specifications, output voltage, current rating, package type, and protection features. The primary difference is product status change from Last Time Buy to Active.

Q: What is the key difference between LP3893ES-1.2/NOPB and LP38856S-1.2/NOPB?

A: Both parts provide 1.2V fixed output at 3A in TO-263 packaging. LP38856S-1.2/NOPB features reduced dropout voltage (0.45V @ 3A) compared to LP3893ES-1.2/NOPB (1V @ 1A), making it suitable for applications requiring lower input-to-output voltage differential. LP38856S-1.2/NOPB has higher quiescent current (300 µA versus 30 µA).

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the TO-263 (DDPAK-5) package with identical pinout and footprint, enabling direct PCB substitution without layout modifications.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. LP3893ES-1.2/NOPB and LP38856S-1.2/NOPB are both ROHS3 compliant, REACH unaffected, and carry MSL rating 3 (168 Hours), matching the original part's compliance profile.

Q: Which substitute should be selected for battery-powered applications?

A: LP3893ES-1.2/NOPB is preferred for battery-powered designs due to lower quiescent current (30 µA versus 300 µA). LP38856S-1.2/NOPB is suitable only if the reduced dropout voltage benefit outweighs the increased standby current consumption.

Q: Can LP38856S-1.2/NOPB be used in applications originally designed for LP3893ES-1.2?

A: Yes, provided the application can accommodate the higher quiescent current. The improved dropout voltage may provide additional design margin in power-constrained systems.