Infineon IR2171 Current Sense Regulator - Equivalent & Substitute Parts

Part Overview

The Infineon IR2171 is a current sense regulator IC in 8-SOIC surface mount packaging, designed for power management applications requiring precise current sensing. This component operates across an input voltage range of 9.5V to 20V with a 1mA output specification and supports operating temperatures from -40°C to 125°C.

The IR2171 has reached obsolete product status. Identifying qualified substitute components ensures design continuity and maintains supply chain reliability for applications currently utilizing this part.

Substiute Parts

98-0229

Infineon TechnologiesIn Stock: 95298-0229 Datasheet

Current PartRFQ

IR2175SPBF

Infineon TechnologiesIn Stock: 1575IR2175SPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IR2171 is determined by the following critical parameters:

• Package Compatibility: Identical 8-SOIC (0.154", 3.90mm Width) surface mount package ensures PCB layout and assembly process compatibility
• Input Voltage Range: Matching 9.5V ~ 20V specification maintains circuit operation within design parameters
• Operating Temperature Range: Identical -40°C ~ 125°C range ensures thermal performance consistency
• Functional Category: Current sense regulator function within power management applications
• Manufacturer Continuity: Infineon Technologies as primary manufacturer ensures design validation and technical support alignment

The IR2175SPBF qualifies as a manufacturer-recommended substitute based on these core compatibility criteria.

Parameter Comparison

Engineering Selection Recommendations

The IR2175SPBF is the manufacturer-recommended substitute for the IR2171. Both components share identical package geometry, input voltage specifications, and operating temperature ranges, enabling direct functional replacement in 8-SOIC surface mount applications.

The IR2175SPBF provides enhanced specifications including ±0.5% accuracy and increased 20mA output current capability compared to the IR2171's 1mA specification. The IR2175SPBF achieves ROHS3 compliance, addressing regulatory requirements that the original IR2171 does not meet.

Both components carry obsolete product status. For new designs or long-term supply assurance, evaluation of current-generation current sense regulators from Infineon Technologies or alternative manufacturers may be warranted.

Frequently Asked Questions (FAQ)

Q: Can the IR2175SPBF directly replace the IR2171 in existing designs?

A: Yes. Both components utilize identical 8-SOIC packaging, matching input voltage range (9.5V ~ 20V), and identical operating temperature specifications (-40°C ~ 125°C). PCB layout and assembly processes require no modification.

Q: What are the key differences between these parts?

A: The IR2175SPBF provides higher output current (20mA versus 1mA), specified accuracy (±0.5%), and ROHS3 compliance. The IR2171 offers unlimited moisture sensitivity storage capability (MSL 1) compared to the IR2175SPBF's one-year limitation (MSL 2).

Q: Are there compatibility concerns with the increased output current specification?

A: The IR2175SPBF's 20mA output current is a superset capability. Applications designed for 1mA operation will function within the IR2175SPBF's specifications. Circuit design review is necessary only if current-limiting components or feedback networks depend on the original 1mA specification.

Q: What is the impact of RoHS compliance differences?

A: The IR2175SPBF meets ROHS3 standards while the IR2171 does not. For applications subject to RoHS regulatory requirements or customer specifications mandating RoHS compliance, the IR2175SPBF satisfies these requirements.

Q: How should moisture sensitivity differences be managed?

A: The IR2171 (MSL 1) permits unlimited storage without moisture precautions. The IR2175SPBF (MSL 2) requires controlled storage conditions with a one-year floor life limit. Standard moisture barrier packaging and desiccant storage protocols address this requirement.