IRU1207-18CS Equivalent & Substitute Parts

Part Overview

The IRU1207-18CS 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 device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The regulator integrates over-current and over-temperature protection with an enable control feature, suitable for applications requiring stable 1.8V rails with moderate current demands.

Substiute Parts

IRU1207-18CS

Infineon TechnologiesIn Stock: 4551IRU1207-18CS Datasheet

Current PartRFQ

MIC37101-1.8YM

Microchip TechnologyIn Stock: 4932MIC37101-1.8YM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRU1207-18CS is determined by strict alignment of electrical and mechanical parameters. The primary criteria for equivalence are: fixed 1.8V output voltage, 1A output current capability, 8-SOIC package footprint compatibility, positive output configuration, enable control feature, and integrated over-current and over-temperature protection. The maximum input voltage specification (12V for IRU1207-18CS) and dropout voltage characteristics define the operational envelope within which substitutes must function. The MIC37101-1.8YM meets these core requirements while offering improved specifications in certain areas, including lower maximum input voltage requirement (6V) and reduced dropout voltage (0.5V @ 1A).

Parameter Comparison

Engineering Selection Recommendations

The MIC37101-1.8YM is a direct functional substitute for the IRU1207-18CS based on matching electrical specifications and identical 8-SOIC package geometry. The substitute offers superior product lifecycle status (active vs. obsolete), ensuring long-term availability and manufacturing support. The MIC37101-1.8YM provides ROHS3 compliance, addressing regulatory requirements that the original IRU1207-18CS does not meet. The lower maximum input voltage specification (6V vs. 12V) of the substitute requires verification that source voltage in the target application does not exceed 6V; applications with input voltages between 6V and 12V cannot use this substitute. The improved dropout voltage characteristic (0.5V vs. 0.65V) of the MIC37101-1.8YM provides marginal efficiency gains in power-constrained designs. Extended operating temperature range (-40°C to 125°C vs. 0°C to 125°C) of the substitute accommodates wider environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can the MIC37101-1.8YM replace the IRU1207-18CS in all applications?

A: Substitution is valid only when the input voltage does not exceed 6V. Applications requiring input voltages between 6V and 12V cannot use the MIC37101-1.8YM as a direct replacement.

Q: Are the package footprints identical?

A: Yes. Both devices use 8-SOIC (0.154", 3.90mm Width) surface mount packages with identical pin configurations and PCB footprints.

Q: What is the impact of the different dropout voltage specifications?

A: The MIC37101-1.8YM exhibits 0.5V dropout at 1A compared to 0.65V for the IRU1207-18CS. This 0.15V difference reduces power dissipation in the regulator and may improve thermal performance in current-limited applications.

Q: Does the substitute meet current regulatory compliance requirements?

A: The MIC37101-1.8YM is ROHS3 compliant, whereas the IRU1207-18CS is RoHS non-compliant. For applications subject to RoHS regulations, the substitute satisfies compliance requirements.

Q: What are the moisture sensitivity considerations?

A: The IRU1207-18CS has MSL 1 (unlimited shelf life), while the MIC37101-1.8YM has MSL 2 (1-year shelf life). The substitute requires controlled storage conditions and has a defined moisture reflow window.

Q: Are the control and protection features equivalent?

A: Yes. Both devices provide enable control functionality and identical over-current and over-temperature protection features.