XC6503B321GR-G Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The XC6503B321GR-G is an active linear voltage regulator IC manufactured by Torex Semiconductor Ltd, classified as a Power Management (PMIC) component. This device functions as a positive fixed output voltage regulator delivering 500mA at 3.2V with integrated enable control and thermal/current protection features. The part is currently in active production status with 1034 units in stock inventory.

Identification of equivalent and substitute parts is necessary to support supply chain continuity, manage component availability across procurement cycles, and ensure design flexibility when the primary part number becomes unavailable or when alternative sourcing is required.

Substiute Parts

XC6503B321GR-G

Torex Semiconductor LtdIn Stock: 1108XC6503B321GR-G Datasheet

Current PartRFQ

XC6503D321GR-G

Torex Semiconductor LtdIn Stock: 902XC6503D321GR-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the XC6503B321GR-G is determined by strict equivalence across the following critical parameters:

Voltage Specifications: Output voltage must be fixed at 3.2V with maximum input voltage of 6V and maximum dropout voltage of 0.23V at 300mA.

Current Ratings: Output current capacity must be 500mA with quiescent current of 30µA.

Performance Characteristics: Power Supply Rejection Ratio (PSRR) must be 55dB at 1kHz.

Package and Mounting: Physical form factor must be 4-UDFN Exposed Pad in Surface Mount configuration with supplier device package designation of 4-USP (1.2x1.6).

Functional Features: Device must include Enable control feature and provide both Over Current and Over Temperature protection.

Compliance and Status: Part must maintain Active product status, ROHS3 compliance, MSL rating of 1, and identical base product number (XC6503).

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The XC6503D321GR-G is a direct parametric equivalent to the XC6503B321GR-G. Both parts are manufactured by Torex Semiconductor Ltd and share identical electrical specifications, package configuration, and compliance certifications.

Supply Chain Considerations: The XC6503D321GR-G maintains 821 units in current inventory, providing an alternative sourcing option when primary part availability is constrained. Both parts carry Active product status, confirming ongoing manufacturer support and production continuity.

Compliance and Regulatory: Both parts maintain ROHS3 compliance, REACH Unaffected status, and identical MSL rating of 1 (Unlimited moisture sensitivity level). No regulatory or environmental restrictions differentiate these parts.

Design Integration: Direct substitution is supported without circuit modification, PCB layout revision, or thermal management redesign. The identical package footprint (4-UDFN Exposed Pad, 1.2x1.6mm) and mounting type (Surface Mount) ensure mechanical and electrical compatibility in existing designs.

Frequently Asked Questions (FAQ)

Q: Can XC6503D321GR-G be used as a direct replacement for XC6503B321GR-G in production designs?

A: Yes. The XC6503D321GR-G is a parametric equivalent with identical output voltage (3.2V), output current (500mA), dropout voltage (0.23V @ 300mA), PSRR (55dB @ 1kHz), package type (4-UDFN Exposed Pad), and all functional features. No design changes are required.

Q: Are there any differences in the physical package between these two part numbers?

A: No. Both parts use the 4-UDFN Exposed Pad package with supplier device package designation 4-USP (1.2x1.6mm). PCB footprints are identical.

Q: Do both parts have the same protection features?

A: Yes. Both XC6503B321GR-G and XC6503D321GR-G include Over Current and Over Temperature protection, with Enable control functionality.

Q: What is the difference between the "B" and "D" designations in these part numbers?

A: The "B" and "D" designations represent different manufacturing batches or revisions within the XC6503 base product line. Both variants meet identical electrical and mechanical specifications and are fully interchangeable.

Q: Are both parts RoHS compliant?

A: Yes. Both parts are ROHS3 Compliant with MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

Q: Which part should be selected if both are available?

A: Selection may be based on inventory availability, lead time, or supplier preference. Both parts are electrically and mechanically equivalent and will perform identically in the application.