LT1009ILPE3 Equivalent & Substitute Parts

Part Overview

The LT1009ILPE3 is a shunt voltage reference IC manufactured by Texas Instruments, designed to provide a fixed 2.5V output with ±0.2% tolerance. This component belongs to the Power Management (PMIC) category and is housed in a TO-92-3 package for through-hole mounting applications. The LT1009ILPE3 is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	2.5V
Current - Output	10 mA
Tolerance	±0.2%
Temperature Coefficient	35ppm/°C
Current - Cathode	400 µA
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	TO-92-3 (TO-226AA)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LT1009ILPE3 is determined by strict equivalence across the following critical parameters: reference type (shunt), output type (fixed), output voltage (2.5V), output current (10 mA), tolerance (±0.2%), cathode current (400 µA), package type (TO-92-3), and mounting method (through-hole). All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional compatibility in existing circuit designs.

The substitute parts are categorized as follows:

Direct Manufacturer Equivalent: LT1009IZ#PBF maintains identical electrical specifications and packaging, with active product status from Analog Devices Inc.

Manufacturer Recommended Equivalent: LT1009CZ#PBF provides equivalent functionality with a reduced temperature coefficient (25ppm/°C versus 35ppm/°C) and narrower operating temperature range (0°C ~ 70°C), also from Analog Devices Inc.

Parametric Equivalent: LT1009ILP from Texas Instruments matches all critical electrical parameters and operating temperature range, with active product status.

Parameter Comparison

Parameter	LT1009ILPE3	LT1009IZ#PBF	LT1009CZ#PBF	LT1009ILP
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Texas Instruments
Product Status	Obsolete	Active	Active	Active
Reference Type	Shunt	Shunt	Shunt	Shunt
Output Type	Fixed	Fixed	Fixed	Fixed
Voltage - Output (Min/Fixed)	2.5V	2.5V	2.5V	2.5V
Current - Output	10 mA	10 mA	10 mA	10 mA
Tolerance	±0.2%	±0.2%	±0.2%	±0.2%
Temperature Coefficient	35ppm/°C	35ppm/°C	25ppm/°C	35ppm/°C
Current - Cathode	400 µA	400 µA	400 µA	400 µA
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Package / Case	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring extended temperature range (-40°C to 85°C): Select either LT1009IZ#PBF or LT1009ILP. Both maintain the full operating temperature specification of the obsolete LT1009ILPE3 and are currently in active production status, ensuring long-term availability and supply chain stability.

For applications operating within 0°C to 70°C: LT1009CZ#PBF is suitable and offers improved temperature coefficient performance (25ppm/°C), providing enhanced output voltage stability across the reduced temperature range.

For procurement continuity: LT1009ILP from Texas Instruments maintains the original manufacturer relationship while providing active product status and identical electrical specifications.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original component's regulatory certifications.

Frequently Asked Questions (FAQ)

Q: Can LT1009CZ#PBF be used as a direct replacement for LT1009ILPE3 in all applications?

A: LT1009CZ#PBF is functionally equivalent for applications operating within 0°C to 70°C. Applications requiring the full -40°C to 85°C operating range must use LT1009IZ#PBF or LT1009ILP instead.

Q: What is the difference between the substitute parts?

A: LT1009IZ#PBF and LT1009ILP are parametrically identical to the original LT1009ILPE3, differing only in manufacturer and product status (both active). LT1009CZ#PBF offers a superior temperature coefficient (25ppm/°C) but operates within a narrower temperature range (0°C to 70°C).

Q: Are all substitute parts available in the same TO-92-3 package?

A: Yes. All substitute parts use the TO-92-3 (TO-226AA) through-hole package, ensuring mechanical and electrical compatibility with existing PCB designs without layout modifications.

Q: Do the substitute parts maintain the same electrical specifications?

A: All substitute parts maintain the core specifications: 2.5V fixed output, ±0.2% tolerance, 10 mA output current, and 400 µA cathode current. Temperature coefficient and operating temperature range vary as detailed in the parameter comparison table.

Q: Why is the original LT1009ILPE3 marked as obsolete?

A: The LT1009ILPE3 is obsolete, but equivalent active alternatives are available. The substitute parts listed provide identical or superior performance with confirmed long-term availability.

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