XC6221C28AMR-G Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The XC6221C28AMR-G is an active linear voltage regulator manufactured by Torex Semiconductor Ltd, classified as a Power Management Integrated Circuit (PMIC). This device functions as a positive fixed output voltage regulator delivering 200mA output current at a fixed 2.85V output voltage. The part is currently in active production status with 725 units in stock inventory.

Linear voltage regulators of this specification are essential components in power supply circuits where stable, low-noise DC voltage is required for downstream analog and digital circuits. Alternative equivalent parts may be necessary due to supply chain constraints, regional availability, or specific application requirements such as package preference or thermal performance optimization.

Substiute Parts

XC6221C28AMR-G

Torex Semiconductor LtdIn Stock: 805XC6221C28AMR-G Datasheet

Current PartRFQ

S-1315A2J-M5T1U3

ABLIC Inc.In Stock: 964S-1315A2J-M5T1U3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the XC6221C28AMR-G is determined by strict parametric matching across the following critical dimensions:

Output Voltage Matching: The substitute part must deliver a fixed output voltage of 2.85V. This parameter is non-negotiable and defines the primary functional requirement.

Output Current Capacity: The substitute must support a minimum output current of 200mA. Parts with lower current ratings are not acceptable; parts with higher ratings are acceptable.

Input Voltage Compatibility: The substitute must accept input voltages up to the maximum specified for the application circuit. The maximum input voltage of 6V establishes the upper boundary for compatible regulators.

Operating Temperature Range: The substitute must support the full operating temperature range of -40°C to 85°C. Narrower temperature ranges are not acceptable.

Functional Features: The substitute must include Enable control functionality and Over Current protection features as specified in the original part.

Package and Mounting: While the original part uses SOT-25 packaging, mechanically and electrically equivalent packages (such as SOT-23-5) may be acceptable if pin configuration and thermal characteristics remain compatible.

Regulatory Compliance: The substitute must maintain RoHS3 compliance and REACH unaffected status to ensure regulatory continuity.

The S-1315A2J-M5T1U3 manufactured by ABLIC Inc. meets these substitution criteria and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The XC6221C28AMR-G remains the preferred selection when available. This part is in active production status with established supply inventory (725 units in stock) and offers superior electrical performance characteristics, specifically higher PSRR (70dB versus 55dB) and lower dropout voltage (0.17V versus 0.28V).

Substitute Part Applicability: The S-1315A2J-M5T1U3 is a valid parametric equivalent suitable for applications where the following conditions are met:

1. Input supply voltage does not exceed 5.5V (the substitute's maximum input rating)
2. The application circuit can tolerate the higher dropout voltage of 0.28V at full 200mA load
3. Lower noise rejection performance (55dB PSRR) is acceptable for the intended application
4. The substitute's superior quiescent current performance (1 µA versus 50 µA) provides benefit in low-power standby scenarios

Compliance Continuity: Both parts maintain identical regulatory compliance status (RoHS3 compliant, REACH unaffected, MSL Level 1). No compliance-related restrictions apply to substitution.

Packaging Consideration: Both parts use mechanically equivalent SC-74A package footprints. The SOT-25 and SOT-23-5 designations refer to supplier package naming conventions; the physical pin configuration and PCB footprint are compatible.

Supply Chain Strategy: The S-1315A2J-M5T1U3 is available in higher inventory quantity (861 units in stock) and is supplied in Cut Tape format, which may provide advantages for high-volume production environments compared to the original part's Tape & Reel packaging.

Frequently Asked Questions (FAQ)

Q: Can the S-1315A2J-M5T1U3 be used as a direct drop-in replacement for the XC6221C28AMR-G?

A: Yes, for applications where input voltage does not exceed 5.5V and the higher dropout voltage (0.28V) is acceptable. The pin configuration and package footprint are mechanically compatible. However, circuit performance characteristics will differ due to lower PSRR and higher dropout voltage.

Q: What is the impact of the lower maximum input voltage (5.5V) on the S-1315A2J-M5T1U3?

A: If your application circuit supplies input voltage between 5.5V and 6V, the S-1315A2J-M5T1U3 cannot be used. The XC6221C28AMR-G must be retained. If your input supply is consistently below 5.5V, this difference has no practical impact.

Q: Why does the S-1315A2J-M5T1U3 have lower quiescent current but higher dropout voltage?

A: These represent different design trade-offs by the manufacturers. The ABLIC part optimizes for low standby power consumption, while the Torex part optimizes for lower dropout voltage and superior noise performance. Selection depends on application priorities.

Q: Are the SOT-25 and SOT-23-5 packages identical?

A: Both parts use the SC-74A physical package form factor with compatible pin configurations. The different designations (SOT-25 versus SOT-23-5) reflect supplier naming conventions rather than physical differences. PCB footprints are compatible.

Q: What does PSRR mean and why is the difference (70dB versus 55dB) significant?

A: PSRR (Power Supply Rejection Ratio) measures how effectively the regulator rejects noise from the input power supply. The 15dB difference means the XC6221C28AMR-G provides approximately 5.6 times better noise rejection at 1kHz. This is important in noise-sensitive analog applications.

Q: Can I use the S-1315A2J-M5T1U3 in a battery-powered application?

A: Yes. The S-1315A2J-M5T1U3's lower quiescent current (1 µA versus 50 µA) makes it superior for battery-powered designs where standby power consumption is critical. This represents a significant advantage in low-power applications.

Q: What is the significance of the dropout voltage difference?

A: Dropout voltage determines the minimum input voltage required to maintain regulation at full load. At 200mA output, the XC6221C28AMR-G requires 0.17V headroom, while the S-1315A2J-M5T1U3 requires 0.28V. If your input supply is marginal, the lower dropout voltage of the original part may be necessary.

Q: Are both parts suitable for industrial temperature range applications?

A: Yes. Both parts support the identical operating temperature range of -40°C to 85°C, which covers industrial and extended commercial temperature specifications.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging supplies components on continuous tape wound on reels, suitable for automated pick-and-place assembly. Cut Tape supplies components on tape segments, typically used for lower-volume or manual assembly operations. Both formats contain identical components; the difference is in supply format only.