REF3025AIDBZR Equivalent & Substitute Parts

Part Overview

The REF3025AIDBZR is a Series Voltage Reference IC manufactured by Texas Instruments, delivering a fixed 2.5V output with ±0.2% tolerance in a SOT-23-3 surface mount package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or specific application parameters that align with the electrical and mechanical specifications of this reference voltage device.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	REF3025AIDBZR
Category	Power Management (PMIC)
Reference Type	Series
Output Voltage	2.5V (Fixed)
Output Current	25 mA
Tolerance	±0.2%
Temperature Coefficient	75 ppm/°C
Input Voltage Range	2.55V ~ 5.5V
Supply Current	50 µA
Operating Temperature	-40°C ~ 125°C
Package	SOT-23-3 (TO-236-3, SC-59)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the REF3025AIDBZR are classified based on strict alignment with the following critical parameters: fixed 2.5V output voltage, SOT-23-3 package compatibility, surface mount mounting type, and ROHS3 compliance. Substitution eligibility is determined by matching output voltage, tolerance specifications, input voltage operating range, and thermal operating window. Parts are grouped into parametric equivalents (identical electrical specifications with different packaging or manufacturer variants) and manufacturer-recommended alternatives (functionally compatible parts with minor parameter variations that remain within acceptable application tolerances).

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Tolerance	Temp Coefficient	Input Voltage	Supply Current	Operating Temp	Package	Status
REF3025AIDBZR	Texas Instruments	2.5V	25 mA	±0.2%	75 ppm/°C	2.55V ~ 5.5V	50 µA	-40°C ~ 125°C	SOT-23-3	Active
REF3025AIDBZT	Texas Instruments	2.5V	25 mA	±0.2%	75 ppm/°C	2.55V ~ 5.5V	50 µA	-40°C ~ 125°C	SOT-23-3	Active
REF3025AIDBZTG4	Texas Instruments	2.5V	25 mA	±0.2%	75 ppm/°C	2.55V ~ 5.5V	50 µA	-40°C ~ 125°C	SOT-23-3	Obsolete
ISL21010CFH325Z-TK	Renesas Electronics	2.5V	25 mA	±0.2%	50 ppm/°C	2.6V ~ 5.5V	100 µA	-40°C ~ 125°C	SOT-23-3	Active
ISL21080CIH315Z-TK	Renesas Electronics	1.5V	7 mA	±0.5%	50 ppm/°C	2.7V ~ 5.5V	1.5 µA	-40°C ~ 85°C	SOT-23-3	Active
LT1460HCS3-2.5#TRMPBF	Analog Devices Inc.	2.5V	40 mA	±0.2%	20 ppm/°C	3.4V ~ 20V	175 µA	0°C ~ 70°C	SOT-23-3	Active
LT1460JCS3-2.5#TRMPBF	Analog Devices Inc.	2.5V	40 mA	±0.4%	20 ppm/°C	3.4V ~ 20V	175 µA	0°C ~ 70°C	SOT-23-3	Active
LT1460JCS3-2.5#TRPBF	Analog Devices Inc.	2.5V	40 mA	±0.4%	20 ppm/°C	3.4V ~ 20V	175 µA	0°C ~ 70°C	SOT-23-3	Active
LT1460KCS3-2.5#TRMPBF	Analog Devices Inc.	2.5V	40 mA	±0.5%	50 ppm/°C	3.4V ~ 20V	175 µA	0°C ~ 70°C	SOT-23-3	Active
MAX6025AEUR+T	Analog Devices Inc./Maxim Integrated	2.5V	500 µA	±0.2%	20 ppm/°C	2.7V ~ 12.6V	35 µA	-40°C ~ 85°C	SOT-23-3	Active
MAX6035BAUR25+T	Analog Devices Inc./Maxim Integrated	2.5V	10 mA	±0.5%	75 ppm/°C	4.4V ~ 33V	95 µA	-40°C ~ 125°C	SOT-23-3	Active

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitution)

REF3025AIDBZT is a direct parametric equivalent to REF3025AIDBZR, differing only in packaging format (Tape & Reel versus Cut Tape). Both maintain identical electrical specifications: 2.5V fixed output, ±0.2% tolerance, 75 ppm/°C temperature coefficient, and -40°C to 125°C operating range. REF3025AIDBZT is Active status and ROHS3 compliant, making it suitable for direct replacement in applications where packaging format is interchangeable.

REF3025AIDBZTG4 shares identical electrical parameters with the main part but carries Obsolete product status. Use of this part is not recommended for new designs or long-term production applications.

Manufacturer-Recommended Alternatives (Functional Compatibility)

ISL21010CFH325Z-TK (Renesas Electronics) provides 2.5V fixed output with ±0.2% tolerance and improved temperature coefficient (50 ppm/°C versus 75 ppm/°C). Input voltage range extends to 2.6V minimum and maintains -40°C to 125°C operating window. Supply current is elevated to 100 µA. This part is Active status and ROHS3 compliant.

ISL21080CIH315Z-TK differs in output voltage (1.5V fixed) and is not a direct substitute for 2.5V applications. This part is listed as a cross-reference but does not meet the 2.5V output requirement.

LT1460HCS3-2.5#TRMPBF (Analog Devices Inc.) delivers 2.5V with ±0.2% tolerance and superior temperature coefficient (20 ppm/°C). Output current capability is increased to 40 mA. Input voltage range is 3.4V to 20V, and operating temperature is limited to 0°C to 70°C. This part is Active and ROHS3 compliant but has narrower temperature operating range than the main part.

LT1460JCS3-2.5#TRMPBF and LT1460JCS3-2.5#TRPBF are functionally identical variants with ±0.4% tolerance (versus ±0.2%), 40 mA output current, and 0°C to 70°C operating range. Both are Active and ROHS3 compliant.

LT1460KCS3-2.5#TRMPBF provides 2.5V with ±0.5% tolerance, 40 mA output current, and 50 ppm/°C temperature coefficient. Operating range is 0°C to 70°C. Active status and ROHS3 compliant.

MAX6025AEUR+T (Analog Devices Inc./Maxim Integrated) offers 2.5V with ±0.2% tolerance and exceptional output current capability (500 µA). Temperature coefficient is 20 ppm/°C. Input voltage range is 2.7V to 12.6V, and operating temperature is -40°C to 85°C. This part is Active and ROHS3 compliant.

MAX6035BAUR25+T provides 2.5V with ±0.5% tolerance and 10 mA output current. Input voltage range extends to 4.4V to 33V, supporting higher supply voltages. Operating temperature is -40°C to 125°C. This part is Active and ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can REF3025AIDBZT be used as a direct replacement for REF3025AIDBZR?

A: Yes. REF3025AIDBZT is a parametric equivalent with identical electrical specifications. The only difference is packaging format (Tape & Reel versus Cut Tape). Both parts maintain 2.5V output, ±0.2% tolerance, and -40°C to 125°C operating range. Substitution is valid when packaging format compatibility is confirmed.

Q: What is the key difference between the Texas Instruments REF3025 series and the Renesas ISL21010CFH325Z-TK?

A: Both deliver 2.5V with ±0.2% tolerance and support -40°C to 125°C operation. The ISL21010CFH325Z-TK has improved temperature coefficient (50 ppm/°C versus 75 ppm/°C) but requires higher supply current (100 µA versus 50 µA). Input voltage minimum is slightly higher at 2.6V versus 2.55V.

Q: Why do the Analog Devices LT1460 series parts have different operating temperature ranges?

A: The LT1460 family operates from 0°C to 70°C, which is narrower than the REF3025AIDBZR range of -40°C to 125°C. Applications requiring full industrial temperature range (-40°C to 125°C) should not use LT1460 variants unless the specific application temperature window is confirmed to fall within 0°C to 70°C.

Q: Can MAX6025AEUR+T replace REF3025AIDBZR in all applications?

A: MAX6025AEUR+T is compatible for 2.5V reference applications but has different output current capability (500 µA versus 25 mA) and operating temperature range (-40°C to 85°C versus -40°C to 125°C). Substitution is valid when load current requirements do not exceed 500 µA and operating temperature does not exceed 85°C.

Q: What does the ±0.2% tolerance specification mean for the REF3025AIDBZR?

A: The ±0.2% tolerance indicates that the output voltage will remain within 2.495V to 2.505V across the specified operating conditions. This tight tolerance is maintained across the -40°C to 125°C temperature range and 2.55V to 5.5V input voltage range.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the environmental compliance status of the REF3025AIDBZR.

Q: What is the significance of the SOT-23-3 package specification?

A: SOT-23-3 is the physical package format (also designated TO-236-3 or SC-59). All listed substitute parts use identical SOT-23-3 surface mount packaging, ensuring PCB footprint and land pattern compatibility. This allows direct board-level substitution without layout modifications.

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