XC6221B28AMR-G Equivalent & Substitute Parts

Part Overview

The XC6221B28AMR-G is a linear voltage regulator IC manufactured by Torex Semiconductor Ltd, classified as a Power Management (PMIC) component. This device provides a fixed positive output of 2.85V at 200mA with a maximum input voltage of 6V, housed in a SOT-25-5 package. The regulator features enable control, over-current and short-circuit protection, and operates across the temperature range of -40°C to 85°C. With an active product status and ROHS3 compliance, this component is suitable for applications requiring stable low-voltage regulation in space-constrained surface-mount designs. Equivalent and substitute parts are identified based on matching electrical specifications, output voltage tolerance, current capacity, and package compatibility.

Substiute Parts

XC6221B28AMR-G

Torex Semiconductor LtdIn Stock: 1055XC6221B28AMR-G Datasheet

Current PartRFQ

XC6221A28AMR-G

Torex Semiconductor LtdIn Stock: 1147XC6221A28AMR-G Datasheet

Parametric EquivalentRFQ

BU28SD2MG-MTR

Rohm SemiconductorIn Stock: 2658BU28SD2MG-MTR Datasheet

SimilarRFQ

BU28TD3WG-TR

Rohm SemiconductorIn Stock: 20132BU28TD3WG-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the XC6221B28AMR-G are identified through parametric equivalence based on the following critical selection criteria:

Primary Equivalence Criteria:

• Output voltage configuration: Positive fixed output
• Output voltage level: 2.85V nominal (tolerance range 2.8V to 2.85V acceptable)
• Output current capacity: 200mA minimum
• Input voltage maximum: 6V
• Package type: Surface mount, SOT-25-5 or equivalent 5-pin package
• Control features: Enable function present
• Protection: Over-current and short-circuit protection

Substitution Categories:

Parametric Equivalent: XC6221A28AMR-G is a direct parametric equivalent from the same manufacturer (Torex Semiconductor Ltd), sharing identical electrical specifications, output voltage, current rating, dropout voltage, PSRR, and operating temperature range. This part differs only in internal design revision (A-series variant) while maintaining full functional compatibility.

Similar Substitutes: BU28SD2MG-MTR and BU28TD3WG-TR are manufactured by Rohm Semiconductor and provide functional equivalence with minor parameter variations. These parts maintain the 200mA output current, positive fixed output configuration, and enable control features. Output voltage is specified at 2.8V (50mV lower than the primary part), which remains within acceptable tolerance for most 2.85V applications. Both parts are housed in 5-SSOP packages compatible with SOT-25-5 footprints.

Parameter Comparison

Engineering Selection Recommendations

XC6221A28AMR-G (Parametric Equivalent): This part is the primary substitute choice for direct replacement applications. As a Torex Semiconductor product with identical electrical specifications, output voltage, current capacity, and operating temperature range, it provides seamless functional compatibility. Both parts maintain ROHS3 compliance and identical package specifications. Selection of this substitute introduces no design modifications or performance trade-offs.

BU28SD2MG-MTR (Similar Substitute): This Rohm Semiconductor part is suitable for applications where the 50mV output voltage reduction (2.8V vs. 2.85V) is acceptable. The part offers superior dropout voltage performance (0.15V @ 100mA vs. 0.17V @ 100mA) and extended operating temperature range (-40°C to 105°C). The automotive-grade AEC-Q100 qualification and over-temperature protection provide additional robustness for demanding environments. ROHS3 compliance is maintained. Package compatibility is confirmed through SC-74A/SOT-753 equivalence.

BU28TD3WG-TR (Similar Substitute): This Rohm Semiconductor alternative maintains identical PSRR performance (70dB @ 1kHz) and operating temperature range (-40°C to 85°C) as the primary part. The 50mV output voltage reduction is consistent with BU28SD2MG-MTR. Quiescent current is 60 µA (10 µA higher than the primary part). The higher dropout voltage specification (0.5V @ 200mA) indicates reduced efficiency at maximum current conditions. ROHS3 compliance and package compatibility are confirmed. This part is suitable where the higher dropout voltage does not impact system performance.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 export classification as the primary part.

Frequently Asked Questions (FAQ)

Q: Can XC6221A28AMR-G be used as a direct replacement for XC6221B28AMR-G?

A: Yes. XC6221A28AMR-G is a parametric equivalent with identical output voltage (2.85V), output current (200mA), dropout voltage (0.17V @ 100mA), PSRR (70dB @ 1kHz), and operating temperature range (-40°C to 85°C). Both parts are manufactured by Torex Semiconductor Ltd and share the same SOT-25-5 package specification. No circuit modifications are required.

Q: What is the output voltage difference between XC6221B28AMR-G and the Rohm Semiconductor substitutes?

A: The primary part specifies 2.85V fixed output, while BU28SD2MG-MTR and BU28TD3WG-TR specify 2.8V fixed output. This represents a 50mV reduction. For applications with voltage regulation requirements that tolerate this variance, the Rohm parts are compatible. Applications requiring strict 2.85V output should use XC6221A28AMR-G.

Q: Are the Rohm Semiconductor parts (BU28SD2MG-MTR and BU28TD3WG-TR) pin-compatible with the primary part?

A: Both Rohm parts use 5-SSOP packaging, which is footprint-compatible with the SOT-25-5 package of the primary part. Pin assignments for enable control and protection features are functionally equivalent. PCB layout modifications are not required for package substitution.

Q: What is the difference in dropout voltage between BU28SD2MG-MTR and BU28TD3WG-TR?

A: BU28SD2MG-MTR specifies 0.15V dropout at 100mA, while BU28TD3WG-TR specifies 0.5V dropout at 200mA. The BU28SD2MG-MTR provides superior dropout performance at lower current levels, resulting in higher efficiency. BU28TD3WG-TR exhibits higher dropout at full current capacity, which may impact power dissipation in high-current applications.

Q: Which substitute part offers the widest operating temperature range?

A: BU28SD2MG-MTR operates from -40°C to 105°C, providing a 20°C extension above the primary part's -40°C to 85°C range. This extended range is suitable for industrial and automotive applications requiring higher temperature operation. XC6221A28AMR-G and BU28TD3WG-TR maintain the -40°C to 85°C range of the primary part.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. XC6221A28AMR-G, BU28SD2MG-MTR, and BU28TD3WG-TR are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level. All parts are REACH unaffected and classified as EAR99 for export purposes, matching the primary part's compliance profile.

Q: What protection features do the substitute parts provide?

A: XC6221A28AMR-G provides over-current and short-circuit protection, identical to the primary part. BU28SD2MG-MTR and BU28TD3WG-TR provide over-current and over-temperature protection. The over-temperature protection in the Rohm parts offers additional thermal management capability not present in the Torex devices.

Q: Can I use BU28TD3WG-TR in a high-current application at 200mA continuous?

A: BU28TD3WG-TR is rated for 200mA output current and includes over-current protection. However, the 0.5V dropout voltage at 200mA results in higher power dissipation compared to the primary part (0.17V dropout). Thermal analysis is required to confirm adequate heat dissipation in the application's thermal environment. For efficiency-critical designs, BU28SD2MG-MTR or XC6221A28AMR-G are preferred.