REF3025TB-GT3 Equivalent & Substitute Parts

Part Overview

The REF3025TB-GT3 is a series voltage reference IC manufactured by onsemi, providing a fixed 2.5V output with ±0.2% tolerance in a SOT-23-3 surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a -40°C to 85°C temperature range with 10 mA output current capability and is suitable for precision analog applications requiring stable voltage references.

Substiute Parts

REF3025TB-GT3

onsemiIn Stock: 762REF3025TB-GT3 Datasheet

Current PartRFQ

ISL21080CIH325Z-TK

Renesas Electronics CorporationIn Stock: 2590ISL21080CIH325Z-TK Datasheet

SimilarRFQ

REF3025AIDBZR

Texas InstrumentsIn Stock: 56308REF3025AIDBZR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the REF3025TB-GT3 is determined by the following critical parameters that must remain compatible:

• Fixed output voltage of 2.5V
• SOT-23-3 package footprint for direct PCB compatibility
• Input voltage range of 2.7V ~ 5.5V minimum
• Operating temperature range support of at least -40°C ~ 85°C
• Surface mount technology

Substitute parts are grouped based on tolerance specifications and output current ratings. Parts maintaining ±0.2% tolerance with equal or greater output current capacity provide direct functional equivalence. Parts with relaxed tolerance (±0.3%) or reduced output current are listed as alternatives where application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

REF3025AIDBZR (Texas Instruments) is the primary substitute for REF3025TB-GT3. This part maintains identical ±0.2% tolerance and provides superior output current capability (25 mA versus 10 mA), ensuring compatibility with existing designs while offering enhanced performance margin. The part is actively manufactured and ROHS3 compliant, supporting long-term supply chain stability. The extended operating temperature range (-40°C ~ 125°C) provides additional design flexibility. Higher temperature coefficient (75 ppm/°C versus 50 ppm/°C) and increased supply current (50 µA versus 30 µA) are acceptable trade-offs for applications using the REF3025TB-GT3.

ISL21080CIH325Z-TK (Renesas Electronics Corporation) serves as a secondary substitute where supply constraints or cost considerations apply. This part maintains the same input voltage range and operating temperature limits as the original. The relaxed tolerance specification (±0.3% versus ±0.2%) and reduced output current (7 mA versus 10 mA) require application-level verification. Superior noise performance (30 µVp-p versus 50 µVp-p) and significantly lower supply current (1.5 µA versus 30 µA) benefit power-sensitive applications. Active product status and availability ensure production continuity.

Frequently Asked Questions (FAQ)

Q: Can REF3025AIDBZR directly replace REF3025TB-GT3 without PCB modifications?

A: Yes. Both parts use identical SOT-23-3 packaging and pinout. No PCB layout changes are required. The higher output current rating (25 mA) and extended temperature range provide enhanced capability without affecting existing circuit operation.

Q: What is the impact of ±0.3% tolerance in ISL21080CIH325Z-TK compared to ±0.2% in the original?

A: The tolerance difference represents a 0.1% relaxation in output voltage accuracy. Applications requiring precision voltage references within ±0.2% specification must verify that system-level tolerances accommodate this change. Circuits with wider tolerance budgets are unaffected.

Q: Is the reduced output current of ISL21080CIH325Z-TK (7 mA) sufficient?

A: Substitution feasibility depends on actual load current requirements. If the design draws less than 7 mA from the reference output, the Renesas part is suitable. Designs requiring the full 10 mA or higher should use REF3025AIDBZR (25 mA capability).

Q: Are there compliance or certification differences between substitutes?

A: REF3025AIDBZR carries ROHS3 compliance certification. Both substitute parts are REACH Unaffected and classified as EAR99 for export control purposes, matching the original part's regulatory status.

Q: How do temperature coefficient differences affect circuit performance?

A: REF3025AIDBZR exhibits 75 ppm/°C versus the original 50 ppm/°C. Over a 100°C temperature swing, this produces an additional 2.5 mV drift (0.1% of 2.5V output). Applications with tight temperature stability requirements should evaluate this specification against system-level accuracy needs.

Q: What is the significance of lower supply current in ISL21080CIH325Z-TK?

A: The 1.5 µA supply current (versus 30 µA in the original) reduces quiescent power consumption by approximately 95%. This benefit applies only to the reference IC itself and is significant in battery-powered or ultra-low-power applications where every microampere matters.