IRU1010-18CS Equivalent & Substitute Parts

Part Overview

The IRU1010-18CS is a linear voltage regulator IC from Infineon Technologies designed for positive fixed 1.8V output at 1A current capacity in an 8-SOIC surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part delivers regulated 1.8V output with integrated over-current and over-temperature protection features suitable for power management applications requiring low dropout regulation.

Substiute Parts

IRU1010-18CS

Infineon TechnologiesIn Stock: 5189IRU1010-18CS Datasheet

Current PartRFQ

LD1117D33CTR

STMicroelectronicsIn Stock: 7319LD1117D33CTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IRU1010-18CS are identified based on the following critical parameters that determine functional compatibility:

Package Compatibility: Both the main part and substitute must use 8-SOIC surface mount packaging to ensure PCB layout compatibility without redesign.

Output Configuration: Positive fixed output voltage regulation is required. The substitute must maintain fixed output voltage operation without adjustable functionality.

Voltage Regulation Characteristics: The substitute must support the same output voltage class (1.8V fixed) or operate within compatible voltage ranges for the application circuit.

Current Capacity: Output current rating must meet or exceed the 1A requirement of the original design.

Dropout Voltage: Maximum dropout voltage specifications must be compatible with the input voltage range and load conditions.

Protection Features: Over-current and over-temperature protection must be present in the substitute part.

Mounting Type: Surface mount technology is required for both parts.

Parameter Comparison

Engineering Selection Recommendations

The LD1117D33CTR from STMicroelectronics serves as a functional substitute for the obsolete IRU1010-18CS based on the following engineering criteria:

Package Compatibility: Both parts use identical 8-SOIC surface mount packaging, enabling direct PCB layout compatibility without redesign.

Regulatory Compliance: The LD1117D33CTR is ROHS3 compliant and actively manufactured, addressing the obsolescence and non-compliance status of the IRU1010-18CS.

Electrical Characteristics: Both parts provide fixed positive output voltage regulation with integrated over-current and over-temperature protection. The LD1117D33CTR demonstrates superior PSRR performance (75dB versus 70dB at 120Hz) and supports an extended operating temperature range (-40°C to 125°C versus 0°C to 125°C).

Design Considerations: The LD1117D33CTR is rated for 800mA output current compared to the 1A rating of the IRU1010-18CS. Applications requiring the full 1A capacity must be evaluated against the 800mA specification. The fixed output voltage of the LD1117D33CTR is 3.3V rather than 1.8V; circuit redesign is required if the 1.8V output is critical to application function. The maximum input voltage rating of 15V for the LD1117D33CTR exceeds the 7V maximum of the original part, providing greater input voltage margin.

Inventory Status: The LD1117D33CTR maintains active production status with substantial inventory availability, ensuring long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the LD1117D33CTR be used as a direct pin-for-pin replacement for the IRU1010-18CS?

A: Both parts use the 8-SOIC package with identical physical dimensions and pin spacing, enabling direct PCB placement compatibility. However, the fixed output voltage differs (3.3V versus 1.8V), requiring circuit evaluation to confirm voltage compatibility with downstream components.

Q: What is the primary limitation of using the LD1117D33CTR as a substitute?

A: The LD1117D33CTR is rated for 800mA maximum output current, compared to the 1A rating of the IRU1010-18CS. Applications drawing sustained currents above 800mA require alternative parts or circuit redesign to reduce load current.

Q: Does the LD1117D33CTR meet current regulatory requirements?

A: Yes. The LD1117D33CTR is ROHS3 compliant, addressing the RoHS non-compliance status of the obsolete IRU1010-18CS and meeting current environmental and regulatory standards.

Q: Are there any temperature range considerations when substituting these parts?

A: The LD1117D33CTR supports an extended operating temperature range of -40°C to 125°C compared to 0°C to 125°C for the IRU1010-18CS. This provides additional margin for applications operating at lower ambient temperatures.

Q: What packaging options are available for the LD1117D33CTR?

A: The LD1117D33CTR is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, both maintaining the 8-SOIC surface mount configuration.

Q: How do the power supply rejection ratio specifications compare?

A: The LD1117D33CTR provides 75dB PSRR at 120Hz, compared to 70dB for the IRU1010-18CS. The improved PSRR of the substitute part offers better noise rejection in applications with rippled input supplies.