REG102NA-3/3K Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The REG102NA-3/3K is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output applications with 250mA current capacity in SOT-23-5 surface mount packaging. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. Identifying equivalent and substitute parts is necessary to ensure design continuity, support long-term production requirements, and maintain supply chain flexibility for applications requiring 3V regulated power delivery.

Substiute Parts

REG102NA-3/3K

Texas InstrumentsIn Stock: 1729REG102NA-3/3K Datasheet

Current PartRFQ

TPS7A2501DRVR

Texas InstrumentsIn Stock: 17394TPS7A2501DRVR Datasheet

MFR RecommendedRFQ

LP2992IM5-3.0/NOPB

Texas InstrumentsIn Stock: 1607LP2992IM5-3.0/NOPB Datasheet

MFR RecommendedRFQ

REG102NA-3/250

Texas InstrumentsIn Stock: 2175REG102NA-3/250 Datasheet

Parametric EquivalentRFQ

MIC5219-3.0YM5-TR

Microchip TechnologyIn Stock: 2275MIC5219-3.0YM5-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the REG102NA-3/3K is determined by the following critical parameters:

Primary Substitution Criteria:

• Output voltage: 3V fixed
• Output current capacity: minimum 250mA
• Package type: SOT-23-5 (SC-74A, SOT-753)
• Output configuration: Positive fixed
• Surface mount mounting type

Secondary Compatibility Factors:

• Input voltage rating: minimum 10V
• Dropout voltage performance
• Quiescent current characteristics
• Operating temperature range overlap
• RoHS3 compliance

Parts meeting all primary criteria are classified as direct substitutes. Parts with enhanced specifications (higher current capacity, wider temperature range, lower quiescent current) are functionally compatible but represent design upgrades.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Identical Specifications):

REG102NA-3/250 is a parametric equivalent with identical electrical specifications and SOT-23-5 packaging. Both devices share Last Time Buy status, indicating similar supply constraints. This part maintains full compatibility for existing designs without modification.

Active Production Alternatives (Enhanced Specifications):

LP2992IM5-3.0/NOPB provides 3V fixed output at 250mA in SOT-23-5 packaging with Active product status, ensuring long-term availability. This device features lower quiescent current (95 µA vs. 500 µA) and extended operating temperature range (-40°C ~ 125°C), making it suitable for designs requiring improved power efficiency and wider temperature operation. Higher dropout voltage (0.85V @ 250mA) must be evaluated against application input voltage margins.

MIC5219-3.0YM5-TR from Microchip Technology delivers 3V fixed output at 500mA in SOT-23-5 packaging with Active status. This device provides double the output current capacity with significantly lower quiescent current (8 µA), supporting higher load applications and battery-powered designs. Dropout voltage of 0.6V @ 500mA and extended temperature range (-40°C ~ 125°C) enhance performance margins.

TPS7A2501DRVR is a Texas Instruments device with adjustable output (1.24V - 17.66V) and 300mA capacity in 6-WSON packaging. This part requires external resistor network for 3V configuration and different PCB footprint. Active status and extended temperature range (-40°C ~ 125°C) support long-term designs. Package change necessitates PCB layout modification.

Selection Basis:

All recommended substitutes maintain ROHS3 compliance and RoHS certification status. Active production status ensures supply continuity beyond Last Time Buy constraints. Electrical parameter compatibility within application input voltage and load current requirements determines final selection.

Frequently Asked Questions (FAQ)

Q: Can REG102NA-3/250 directly replace REG102NA-3/3K without design changes?

A: Yes. REG102NA-3/250 is a parametric equivalent with identical output voltage (3V), output current (250mA), dropout voltage (0.27V @ 250mA), quiescent current (500 µA), and SOT-23-5 packaging. No circuit modifications are required. Both devices share Last Time Buy status.

Q: Why is LP2992IM5-3.0/NOPB recommended despite higher dropout voltage?

A: LP2992IM5-3.0/NOPB offers Active product status for long-term availability, identical 3V/250mA specifications, and SOT-23-5 compatibility. The 0.85V dropout voltage (vs. 0.27V) requires verification against application input voltage headroom. Lower quiescent current (95 µA) reduces power consumption in battery applications. Extended temperature range (-40°C ~ 125°C) supports wider operating conditions.

Q: What are the package implications of using TPS7A2501DRVR?

A: TPS7A2501DRVR uses 6-WSON (2x2) packaging instead of SOT-23-5, requiring PCB footprint redesign and layout modification. The adjustable output requires external resistor network configuration to achieve 3V output. This substitution is suitable only for new designs with layout flexibility.

Q: How does MIC5219-3.0YM5-TR improve upon the original design?

A: MIC5219-3.0YM5-TR maintains 3V fixed output and SOT-23-5 packaging while doubling output current capacity to 500mA. Quiescent current of 8 µA (vs. 500 µA) significantly reduces standby power consumption. Extended operating temperature range (-40°C ~ 125°C) and Active product status support long-term production. Dropout voltage of 0.6V @ 500mA remains within acceptable margins for most applications.

Q: Are all substitutes RoHS compliant?

A: Yes. All recommended substitute parts maintain ROHS3 compliance status, matching the original REG102NA-3/3K certification.

Q: Which substitute offers the best long-term supply availability?

A: LP2992IM5-3.0/NOPB and MIC5219-3.0YM5-TR both carry Active product status with current inventory levels (1550 Pcs and 2200 Pcs respectively), ensuring sustained availability. REG102NA-3/250 shares Last Time Buy status with the original part.