IRU1050CT Equivalent & Substitute Parts

Part Overview

The IRU1050CT is a linear voltage regulator IC manufactured by Infineon Technologies, designed for positive adjustable output applications requiring 5A current capacity in a TO-220AB package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The IRU1050CT provides adjustable output voltage regulation between 2.5V and 3.3V with integrated over-current and over-temperature protection.

Substiute Parts

IRU1050CT

Infineon TechnologiesIn Stock: 5789IRU1050CT Datasheet

Current PartRFQ

LD1084V

STMicroelectronicsIn Stock: 3987LD1084V Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IRU1050CT are selected based on the following critical parameters that define functional equivalence:

Primary Matching Criteria:

• Output configuration: Positive adjustable
• Current capacity: 5A minimum
• Package type: TO-220-3 (through-hole mounting)
• Number of regulators: Single output
• Protection features: Over-temperature protection (minimum requirement)

Secondary Compatibility Factors:

• Voltage dropout characteristics at rated current
• Quiescent current consumption
• PSRR performance at 120Hz
• Operating temperature range compatibility with application requirements

The LD1084V from STMicroelectronics meets these substitution criteria while offering improved specifications and active product status.

Parameter Comparison

Engineering Selection Recommendations

The LD1084V is the qualified substitute for the IRU1050CT based on the following engineering factors:

Product Status: The IRU1050CT is obsolete, while the LD1084V maintains active product status with ongoing manufacturer support and availability.

Regulatory Compliance: The LD1084V is ROHS3 compliant, addressing modern regulatory requirements. The IRU1050CT is RoHS non-compliant, which may restrict use in new designs subject to RoHS directives.

Functional Compatibility: Both devices share identical TO-220-3 packaging, 5A output current capacity, and positive adjustable output configuration. Pin-to-pin compatibility is maintained for direct board-level substitution.

Performance Characteristics: The LD1084V provides equivalent or superior electrical performance, including higher PSRR (72dB vs 70dB) and additional short-circuit protection alongside over-temperature protection.

Temperature Range Consideration: The IRU1050CT operates to 150°C maximum, while the LD1084V operates to 125°C maximum. Applications requiring operation above 125°C require thermal analysis to confirm the LD1084V is suitable.

Frequently Asked Questions (FAQ)

Q: Can the LD1084V directly replace the IRU1050CT on existing PCBs?

A: Yes. Both devices use identical TO-220-3 packaging with matching pin configurations for positive adjustable linear regulators. No PCB modifications are required for physical substitution.

Q: What are the key electrical differences between these parts?

A: The primary differences are voltage dropout (1.3V vs 1.5V @ 5A), operating temperature range (0–150°C vs -40–125°C), and protection features. The LD1084V adds short-circuit protection and maintains superior PSRR performance.

Q: Is the LD1084V suitable for applications requiring the full 0–150°C operating range of the IRU1050CT?

A: The LD1084V operates to 125°C maximum. Applications requiring sustained operation above 125°C must evaluate thermal management and duty cycle to confirm compatibility, or identify alternative parts with higher temperature ratings.

Q: What compliance advantages does the LD1084V offer?

A: The LD1084V is ROHS3 compliant, meeting modern regulatory requirements for new product designs and markets with RoHS restrictions. The IRU1050CT is RoHS non-compliant.

Q: Are there inventory considerations for this substitution?

A: The IRU1050CT has 5760 units in stock as a legacy part. The LD1084V has 3932 units available as an active product with ongoing supply chain support from STMicroelectronics.

Q: What output voltage range does the LD1084V support?

A: The LD1084V supports adjustable output from 1.25V to 28.5V, providing broader voltage flexibility compared to the IRU1050CT's 2.5V to 3.3V range. Applications using the IRU1050CT within its specified range are fully compatible.