IRU1010-33CS Equivalent & Substitute Parts

Part Overview

The IRU1010-33CS is a linear voltage regulator IC manufactured by Infineon Technologies, designed to deliver a fixed 3.3V output at 1A maximum current in an 8-SOIC surface mount package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part provides over-current and over-temperature protection suitable for general-purpose power management applications requiring low-dropout regulation.

Substiute Parts

IRU1010-33CS

Infineon TechnologiesIn Stock: 1038IRU1010-33CS Datasheet

Current PartRFQ

LD1117D33CTR

STMicroelectronicsIn Stock: 7319LD1117D33CTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRU1010-33CS is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• 8-SOIC package footprint compatibility
• Surface mount mounting type
• Over-current and over-temperature protection
• Positive output configuration with single regulator
• Maximum input voltage rating of 7V or greater
• Dropout voltage specification at rated current

The LD1117D33CTR from STMicroelectronics meets these substitution criteria. Both devices share identical output voltage, package form factor, and protection feature sets. The LD1117D33CTR operates within compatible electrical parameters while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LD1117D33CTR is a direct functional substitute for the IRU1010-33CS based on matching package geometry, output voltage specification, and protection feature implementation. Selection of the LD1117D33CTR provides the following advantages:

• Active product status ensures ongoing availability and manufacturing support
• ROHS3 compliance meets current environmental and regulatory requirements
• Extended operating temperature range (-40°C to 125°C) provides broader application flexibility
• Higher maximum input voltage rating (15V vs 7V) accommodates wider input supply ranges
• Improved PSRR specification (75dB vs 70dB) offers superior noise rejection

The primary design consideration is the output current rating difference: the LD1117D33CTR is rated at 800mA maximum versus the IRU1010-33CS at 1A. Applications requiring the full 1A output current must evaluate whether the 800mA rating of the substitute part meets system requirements. For applications operating below 800mA, the LD1117D33CTR provides direct substitution without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the LD1117D33CTR directly replace the IRU1010-33CS on existing PCBs?

A: Yes, the LD1117D33CTR is pin-compatible and uses the identical 8-SOIC package footprint. No PCB layout modifications are required for physical substitution.

Q: What is the impact of the 800mA vs 1A output current rating difference?

A: The LD1117D33CTR maximum output current is 200mA lower than the IRU1010-33CS. Applications drawing less than 800mA experience no functional impact. Applications requiring sustained output currents above 800mA must use an alternative part rated for 1A or higher.

Q: Does the LD1117D33CTR require different circuit design considerations?

A: The LD1117D33CTR operates with identical output voltage (3.3V fixed) and equivalent dropout voltage at its rated current (1.3V @ 800mA). Input supply voltage can range up to 15V, providing greater flexibility than the IRU1010-33CS 7V maximum. Standard linear regulator bypass capacitor recommendations apply to both devices.

Q: Is the LD1117D33CTR suitable for new designs?

A: Yes. The LD1117D33CTR carries active product status and ROHS3 compliance, making it appropriate for new product development. The IRU1010-33CS obsolete status makes the LD1117D33CTR the recommended choice for ongoing and future implementations.

Q: Are there any thermal or reliability differences between these parts?

A: Both devices include over-temperature protection. The LD1117D33CTR extended operating temperature range (-40°C to 125°C vs 0°C to 125°C) provides operation in lower temperature environments. Thermal performance depends on application current levels and PCB thermal design; both devices use identical package geometry.