REG102UA-A Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The REG102UA-A is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. It delivers 250mA output current in an 8-SOIC surface mount package with integrated over-current and over-temperature protection. The device is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

REG102UA-A

Texas InstrumentsIn Stock: 4199REG102UA-A Datasheet

Current PartRFQ

REG103UA-A

Texas InstrumentsIn Stock: 4182REG103UA-A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the REG102UA-A is determined by the following critical parameters:

• Output configuration must remain positive adjustable
• Package type must be 8-SOIC to ensure PCB compatibility
• Output current capability must meet or exceed 250mA
• Input voltage maximum must support the application circuit
• Output voltage range must encompass the required 2.5V to 5.5V window
• Protection features (over-current and over-temperature) must be present
• Operating temperature range must cover -40°C to 85°C
• RoHS3 compliance must be maintained

The REG103UA-A qualifies as a direct substitute based on these criteria. It maintains identical package geometry, protection architecture, and temperature range while providing enhanced specifications in output current (500mA), input voltage tolerance (15V), and quiescent current performance.

Parameter Comparison

Engineering Selection Recommendations

The REG103UA-A is the qualified substitute for REG102UA-A applications. Selection is based on the following engineering factors:

• Both devices maintain ROHS3 compliance and identical regulatory status
• The REG103UA-A provides superior specifications while maintaining backward compatibility in package footprint and pinout
• The REG103UA-A's higher output current rating (500mA vs 250mA) accommodates applications requiring increased load capacity without circuit redesign
• The extended input voltage range (15V vs 10V) provides greater design flexibility for varied supply conditions
• The lower minimum output voltage (1.295V vs 2.5V) expands application scope for low-voltage circuits
• Identical protection architecture ensures equivalent reliability and thermal management characteristics
• The REG103UA-A's Last Time Buy status provides a defined procurement window for transition planning

Frequently Asked Questions (FAQ)

Q: Can REG103UA-A directly replace REG102UA-A on existing PCBs?

A: Yes. Both devices use identical 8-SOIC packaging with matching pinout and footprint geometry. No PCB modifications are required.

Q: What are the key differences between these regulators?

A: The REG103UA-A provides higher output current (500mA vs 250mA), extended input voltage range (15V vs 10V), and lower minimum output voltage (1.295V vs 2.5V). All other functional parameters remain equivalent.

Q: Are there any circuit design considerations when substituting?

A: The REG103UA-A's enhanced specifications are fully backward compatible. Existing circuit designs for REG102UA-A will function with REG103UA-A without modification. The substitute's higher current capability and voltage range present no compatibility issues.

Q: What is the significance of the product status difference?

A: REG102UA-A is obsolete and no longer manufactured. REG103UA-A carries Last Time Buy status, indicating a defined end-of-life date. Designers should transition to REG103UA-A for new designs and ongoing production support.

Q: Do both devices meet the same compliance standards?

A: Yes. Both REG102UA-A and REG103UA-A are ROHS3 compliant with identical REACH and ECCN classifications.

Q: Is the package moisture sensitivity level the same?

A: Yes. Both devices have MSL 2 (1 Year) rating, requiring identical storage and handling protocols.