REF3012TB-GT3 Equivalent & Substitute Parts

Part Overview

The REF3012TB-GT3 is a series voltage reference IC manufactured by onsemi, designed to provide a fixed 1.25V output with ±0.2% tolerance in a compact SOT-23-3 surface mount package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The REF3012TB-GT3 operates across a 2.7V to 5.5V input range with 10 mA output current capability and is suitable for applications requiring precision voltage reference functionality in power management circuits.

Substiute Parts

REF3012TB-GT3

onsemiIn Stock: 1120REF3012TB-GT3 Datasheet

Current PartRFQ

ISL60002DIH312Z-T7A

Renesas Electronics CorporationIn Stock: 3599ISL60002DIH312Z-T7A Datasheet

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REF3012AIDBZR

Texas InstrumentsIn Stock: 20173REF3012AIDBZR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the REF3012TB-GT3 are qualified based on the following critical parameters that determine functional compatibility:

Core Compatibility Criteria:

• Fixed output voltage of 1.25V
• Series reference type
• SOT-23-3 package / TO-236-3 surface mount configuration
• Input voltage range compatibility (minimum 2.7V, maximum 5.5V)
• Operating temperature range overlap with -40°C to 85°C

Secondary Selection Parameters:

• Output current capability (minimum 10 mA required for direct replacement)
• Tolerance specification (±0.2% preferred for equivalent performance)
• Temperature coefficient performance
• Supply current characteristics

The identified substitute parts meet the core compatibility criteria while offering variations in secondary parameters that may provide improved performance characteristics or enhanced product availability.

Parameter Comparison

Engineering Selection Recommendations

REF3012AIDBZR (Texas Instruments) is the primary recommended substitute for the REF3012TB-GT3. This part maintains identical fixed output voltage (1.25V) and tolerance specification (±0.2%), ensuring equivalent voltage reference accuracy. The REF3012AIDBZR offers superior output current capability (25 mA versus 10 mA), extended operating temperature range (-40°C to 125°C), and active product status with ROHS3 compliance. The wider input voltage range (1.8V to 5.5V) provides additional design flexibility. This part is suitable for direct replacement in applications where the original 10 mA output current requirement is met or exceeded.

ISL60002DIH312Z-T7A (Renesas Electronics Corporation) serves as an alternative substitute when lower supply current consumption is prioritized. This part maintains the 1.25V fixed output and identical input voltage range (2.7V to 5.5V). The ISL60002DIH312Z-T7A features significantly reduced supply current (900nA versus 30µA) and improved temperature coefficient (20ppm/°C). However, the output current is limited to 7 mA and tolerance is relaxed to ±0.4%. This substitute is appropriate for applications with reduced output current requirements and where lower quiescent current consumption provides system-level benefits. The part carries active product status and ROHS3 compliance.

Both substitute parts are available in the identical SOT-23-3 surface mount package, ensuring mechanical and thermal compatibility with existing PCB designs. Selection between these options depends on specific application requirements regarding output current capacity, temperature stability, and supply current constraints.

Frequently Asked Questions (FAQ)

Q: Can REF3012AIDBZR directly replace REF3012TB-GT3 in all applications?

A: REF3012AIDBZR is compatible with applications requiring up to 25 mA output current. If your circuit draws 10 mA or less from the reference output, direct replacement is functionally equivalent. The identical ±0.2% tolerance and 1.25V fixed output ensure voltage reference accuracy is maintained. Verify that your PCB layout accommodates the SOT-23-3 package pinout.

Q: What is the key difference between ISL60002DIH312Z-T7A and REF3012AIDBZR?

A: The primary differences are output current capability and supply current consumption. ISL60002DIH312Z-T7A provides 7 mA maximum output current with 900nA supply current, while REF3012AIDBZR provides 25 mA output current with 50µA supply current. ISL60002DIH312Z-T7A also features ±0.4% tolerance versus ±0.2% for REF3012AIDBZR. Select ISL60002DIH312Z-T7A only if your application requires less than 7 mA output current and prioritizes minimal quiescent current draw.

Q: Are all substitute parts available in SOT-23-3 packaging?

A: Yes. Both REF3012AIDBZR and ISL60002DIH312Z-T7A are supplied in SOT-23-3 surface mount packages, identical to the REF3012TB-GT3. No PCB layout modifications are required for package compatibility.

Q: What compliance certifications apply to these substitute parts?

A: Both REF3012AIDBZR and ISL60002DIH312Z-T7A carry ROHS3 compliance certification. Both parts are REACH Unaffected and classified under ECCN EAR99. The original REF3012TB-GT3 compliance status is not specified in available documentation.

Q: Can ISL60002DIH312Z-T7A be used in applications originally designed for 10 mA output current?

A: ISL60002DIH312Z-T7A is limited to 7 mA maximum output current. Use this part only if your application circuit draws 7 mA or less. If your design requires 10 mA output current, select REF3012AIDBZR instead.

Q: What is the operating temperature range difference between substitutes?

A: REF3012TB-GT3 and ISL60002DIH312Z-T7A both operate from -40°C to 85°C. REF3012AIDBZR extends the upper operating temperature to 125°C, providing additional thermal margin for high-temperature applications.