IRU1010-25CS Equivalent & Substitute Parts

Part Overview

The IRU1010-25CS is a linear voltage regulator IC from Infineon Technologies designed for positive fixed output applications. This 8-SOIC surface mount device delivers 1A output current at a fixed 2.5V output with a maximum dropout voltage of 1.3V at rated current. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

IRU1010-25CS

Infineon TechnologiesIn Stock: 2375IRU1010-25CS Datasheet

Current PartRFQ

LD1117D33CTR

STMicroelectronicsIn Stock: 7319LD1117D33CTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRU1010-25CS is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 8-SOIC surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Output Configuration & Type: The substitute must maintain positive output configuration with fixed voltage output to preserve circuit functionality.

Electrical Performance: The substitute must support the required output current (1A or greater), maintain compatible dropout voltage characteristics, and operate within the specified temperature range.

Protection Features: Over-current and over-temperature protection are mandatory for safe operation in the target application.

The LD1117D33CTR from STMicroelectronics meets these substitution criteria through identical package geometry, matching output configuration, and equivalent protection feature set. However, the substitute operates at a different fixed output voltage (3.3V versus 2.5V) and supports a lower maximum output current (800mA versus 1A), requiring circuit-level evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

The IRU1010-25CS is classified as obsolete, necessitating alternative component identification for new designs and production support. The LD1117D33CTR is an active product from STMicroelectronics with ROHS3 compliance, providing long-term availability and regulatory alignment.

Direct substitution requires evaluation of output voltage requirements. The IRU1010-25CS delivers 2.5V fixed output, while the LD1117D33CTR provides 3.3V fixed output. Applications requiring the original 2.5V specification must confirm circuit tolerance to 3.3V operation or identify alternative 2.5V-output regulators.

Current capacity differs between devices: the IRU1010-25CS supports 1A output, while the LD1117D33CTR is rated for 800mA. Load current requirements must not exceed 800mA for the substitute to operate within specification.

The LD1117D33CTR offers superior input voltage tolerance (15V maximum versus 7V) and extended operating temperature range (-40°C to 125°C versus 0°C to 125°C), providing additional design margin in applications with variable input conditions.

Frequently Asked Questions (FAQ)

Q: Can the LD1117D33CTR directly replace the IRU1010-25CS in existing designs?

A: Direct pin-for-pin replacement is possible due to identical 8-SOIC packaging. However, functional compatibility depends on circuit tolerance to the 3.3V output voltage and maximum 800mA current capacity. Applications requiring 2.5V output or currents exceeding 800mA require alternative solutions.

Q: What are the key differences between these devices?

A: The primary differences are output voltage (2.5V versus 3.3V), maximum output current (1A versus 800mA), maximum input voltage (7V versus 15V), and product status (obsolete versus active). The LD1117D33CTR also provides ROHS3 compliance and extended temperature range.

Q: Why is the IRU1010-25CS classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support. The LD1117D33CTR, as an active product, ensures ongoing availability and manufacturer technical support.

Q: Are there package compatibility concerns?

A: Both devices use the 8-SOIC surface mount package with identical dimensions (0.154" width, 3.90mm). PCB footprints are mechanically compatible without modification.

Q: What compliance certifications apply to each device?

A: The IRU1010-25CS is RoHS non-compliant. The LD1117D33CTR is ROHS3 compliant, meeting current regulatory requirements for electronic components in many markets.

Q: How do PSRR values compare?

A: The IRU1010-25CS provides 70dB PSRR at 120Hz, while the LD1117D33CTR provides 75dB PSRR at 120Hz. The substitute offers marginally superior power supply rejection ratio performance.