XC6503A321GR-G Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The XC6503A321GR-G is an active linear voltage regulator IC manufactured by Torex Semiconductor Ltd, classified as a Power Management (PMIC) component. This device provides a fixed positive output of 3.2V at 500mA with integrated over-current and over-temperature protection. The part is currently in active production status with 942 units in stock inventory.

Substitute parts are identified when components share identical electrical specifications, mechanical compatibility, and compliance certifications, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value
Manufacturer	Torex Semiconductor Ltd
Category	Power Management (PMIC)
Output Voltage (Fixed)	3.2V
Output Current	500mA
Input Voltage (Max)	6V
Dropout Voltage (Max)	0.23V @ 300mA
Quiescent Current	30 µA
PSRR	55dB (1kHz)
Package Type	4-UDFN Exposed Pad (1.2x1.6)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 85°C
Protection Features	Over Current, Over Temperature
Control Features	Enable
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the XC6503A321GR-G are identified based on strict parametric equivalence across the following critical criteria:

Electrical Specifications:

Fixed output voltage of 3.2V
Output current capacity of 500mA
Maximum input voltage of 6V
Dropout voltage of 0.23V @ 300mA
Quiescent current of 30 µA
PSRR of 55dB (1kHz)

Mechanical & Packaging Requirements:

4-UDFN Exposed Pad package (1.2x1.6mm)
Surface mount configuration
Tape & Reel packaging format

Functional Features:

Single positive fixed output regulator
Enable control feature
Over-current and over-temperature protection

Compliance & Environmental:

ROHS3 compliance
MSL 1 rating
Operating temperature range -40°C ~ 85°C

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

Parameter Comparison

Parameter	XC6503A321GR-G	XC6503D321GR-G	Match Status
Manufacturer	Torex Semiconductor Ltd	Torex Semiconductor Ltd	Identical
Output Voltage (Fixed)	3.2V	3.2V	Identical
Output Current	500mA	500mA	Identical
Input Voltage (Max)	6V	6V	Identical
Dropout Voltage (Max)	0.23V @ 300mA	0.23V @ 300mA	Identical
Quiescent Current	30 µA	30 µA	Identical
PSRR	55dB (1kHz)	55dB (1kHz)	Identical
Package Type	4-UDFN Exposed Pad (1.2x1.6)	4-UDFN Exposed Pad (1.2x1.6)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Identical
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Identical
Control Features	Enable	Enable	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
Inventory Status	942 Pcs In Stock	821 Pcs In Stock	Both Active

Engineering Selection Recommendations

XC6503D321GR-G is a direct parametric equivalent to XC6503A321GR-G. Both parts are manufactured by Torex Semiconductor Ltd and share identical electrical, mechanical, and functional specifications. Selection between these parts may be based on:

Inventory availability: XC6503A321GR-G has 942 units in stock; XC6503D321GR-G has 821 units in stock
Supply chain continuity: Both parts maintain active production status
Compliance requirements: Both parts meet ROHS3 compliance and carry identical environmental certifications
Lead time considerations: Availability of either part from current inventory

No technical performance differentiation exists between these components. Both are suitable for applications requiring a 3.2V fixed output linear regulator with 500mA capacity in surface-mount 4-UDFN packaging.

Frequently Asked Questions (FAQ)

Q: Can XC6503D321GR-G be used as a direct replacement for XC6503A321GR-G?

A: Yes. Both parts are parametric equivalents with identical output voltage (3.2V), output current (500mA), dropout voltage (0.23V @ 300mA), package type (4-UDFN Exposed Pad 1.2x1.6), and all functional specifications. Direct substitution is supported without circuit modification.

Q: Are there any differences in the package or mounting requirements?

A: No. Both parts use identical 4-UDFN Exposed Pad packaging (1.2x1.6mm) with surface-mount configuration. PCB footprints and assembly processes are identical.

Q: Do both parts meet the same compliance standards?

A: Yes. Both XC6503A321GR-G and XC6503D321GR-G are ROHS3 compliant with MSL 1 rating and identical environmental certifications.

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

A: The "A" and "D" designations represent different manufacturing batches or revisions from Torex Semiconductor Ltd. Both variants meet identical electrical and mechanical specifications and are functionally interchangeable.

Q: Which part should I select based on availability?

A: Selection should be based on current inventory and supply chain requirements. XC6503A321GR-G has higher current stock (942 units) compared to XC6503D321GR-G (821 units). Both parts are in active production status.

Q: Are the operating temperature ranges identical?

A: Yes. Both parts operate across the identical temperature range of -40°C to 85°C (TA).

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