XC6221A28AMR-G Equivalent & Substitute Parts

Part Overview

The XC6221A28AMR-G is a linear voltage regulator IC manufactured by Torex Semiconductor Ltd, classified as a Power Management (PMIC) component. This device delivers a fixed positive output of 2.85V at 200mA with a maximum dropout voltage of 0.17V at 100mA. The regulator features enable control, over-current protection, and short-circuit protection, operating across the temperature range of -40°C to 85°C. The component is housed in an SOT-25-5 package (SC-74A, SOT-753) and is mounted as a surface-mount device.

The XC6221A28AMR-G is currently in active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are necessary when primary component availability is limited, when supply chain requirements mandate alternative sourcing, or when design flexibility permits selection from qualified alternatives meeting equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Output Voltage (Fixed)	2.85V	V
Output Current	200	mA
Input Voltage (Maximum)	6	V
Dropout Voltage @ 100mA	0.17	V
Quiescent Current	50	µA
PSRR @ 1kHz	70	dB
Operating Temperature Range	-40 to 85	°C
Package Type	SOT-25-5 (SC-74A, SOT-753)	—
Mounting Type	Surface Mount	—
Protection Features	Over Current, Short Circuit	—

Substitute Part Grouping Explanation

Substitution of the XC6221A28AMR-G is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Output voltage configuration: Positive fixed output
Output current rating: 200mA minimum
Input voltage maximum: 6V
Package type: SOT-25-5 (SC-74A, SOT-753) or equivalent 5-pin surface-mount package
Mounting type: Surface mount
Control features: Enable function
Protection: Over-current protection minimum requirement
Compliance: RoHS3 compliant, REACH unaffected

Acceptable Variation Parameters:

Output voltage: 2.8V to 2.85V (within 50mV tolerance for fixed regulators in this class)
Dropout voltage: Up to 0.5V @ 200mA (acceptable for non-critical applications)
Quiescent current: 50µA to 80µA (minor variation acceptable)
PSRR: 68dB to 70dB @ 1kHz (minor variation acceptable)
Operating temperature: -40°C minimum to 85°C minimum (extended range acceptable)

The substitute parts BU28SD2MG-MTR and BU28TD3WG-TR meet these criteria through equivalent electrical performance, identical package configuration, and matching protection features.

Parameter Comparison

Parameter	XC6221A28AMR-G	BU28SD2MG-MTR	BU28TD3WG-TR	Unit
Manufacturer	Torex Semiconductor Ltd	Rohm Semiconductor	Rohm Semiconductor	—
Output Voltage (Fixed)	2.85	2.8	2.8	V
Output Current	200	200	200	mA
Input Voltage (Maximum)	6	6	6	V
Dropout Voltage @ 100mA	0.17	0.15	—	V
Dropout Voltage @ 200mA	—	—	0.5	V
Quiescent Current	50	80	60	µA
PSRR @ 1kHz	70	68	70	dB
Operating Temperature Range	-40 to 85	-40 to 105	-40 to 85	°C
Package Type	SOT-25-5	5-SSOP	5-SSOP	—
Protection Features	Over Current, Short Circuit	Over Current, Over Temperature	Over Current, Over Temperature	—
RoHS3 Compliance	Yes	Yes	Yes	—
REACH Status	Unaffected	Unaffected	Unaffected	—
Product Status	Active	Active	Active	—

Engineering Selection Recommendations

XC6221A28AMR-G (Primary Component)

The XC6221A28AMR-G remains the primary selection when available. This component is in active product status with confirmed inventory of 1132 pieces. It delivers the specified 2.85V output with superior dropout voltage performance (0.17V @ 100mA) and lower quiescent current (50µA). The device includes both over-current and short-circuit protection. Full RoHS3 compliance and REACH unaffected status confirm regulatory alignment.

BU28SD2MG-MTR (Preferred Substitute)

The BU28SD2MG-MTR from Rohm Semiconductor qualifies as the preferred substitute when XC6221A28AMR-G availability is constrained. This device maintains 200mA output current and 6V maximum input voltage. The output voltage is 2.8V, representing a 50mV reduction from the primary part. Dropout voltage performance is superior at 0.15V @ 100mA. The component includes AEC-Q100 automotive qualification and extended operating temperature range to 105°C. Over-current and over-temperature protection are provided. RoHS3 compliance and REACH unaffected status are confirmed. Inventory availability is 2578 pieces.

BU28TD3WG-TR (Secondary Substitute)

The BU28TD3WG-TR from Rohm Semiconductor serves as a secondary substitute option. This device maintains 200mA output current and 6V maximum input voltage with 2.8V fixed output voltage. Dropout voltage is 0.5V @ 200mA, representing reduced performance compared to the primary and preferred substitute. Quiescent current is 60µA. PSRR matches the primary component at 70dB @ 1kHz. Operating temperature range matches the primary component (-40°C to 85°C). Over-current and over-temperature protection are provided. RoHS3 compliance and REACH unaffected status are confirmed. Inventory availability is 20036 pieces.

All three components are surface-mount devices in equivalent 5-pin packages (SOT-25-5 / 5-SSOP) with identical pinout compatibility. All are in active product status with full regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can BU28SD2MG-MTR be used as a direct replacement for XC6221A28AMR-G?

A: Yes. Both devices deliver 200mA output current at 6V maximum input voltage in identical SOT-25-5 / 5-SSOP packages. The output voltage difference of 50mV (2.85V vs. 2.8V) falls within acceptable tolerance for fixed linear regulators in this class. The BU28SD2MG-MTR provides superior dropout voltage (0.15V vs. 0.17V @ 100mA) and includes automotive qualification (AEC-Q100).

Q: What is the key difference between BU28SD2MG-MTR and BU28TD3WG-TR?

A: Both devices provide 2.8V output at 200mA. The primary difference is dropout voltage performance: BU28SD2MG-MTR delivers 0.15V @ 100mA, while BU28TD3WG-TR delivers 0.5V @ 200mA. BU28SD2MG-MTR includes automotive qualification (AEC-Q100) and extended temperature range to 105°C. BU28TD3WG-TR has higher inventory availability (20036 vs. 2578 pieces).

Q: Are the package types identical between all three parts?

A: The packages are functionally equivalent. XC6221A28AMR-G uses SOT-25-5 designation, while both Rohm substitutes use 5-SSOP designation. Both package types are SC-74A / SOT-753 variants with identical 5-pin surface-mount configurations and pinout compatibility.

Q: Do all three parts include protection features?

A: Yes. XC6221A28AMR-G includes over-current and short-circuit protection. BU28SD2MG-MTR and BU28TD3WG-TR include over-current and over-temperature protection. All three devices provide adequate protection for typical linear regulator applications.

Q: What is the output voltage tolerance between these parts?

A: XC6221A28AMR-G provides 2.85V fixed output. Both Rohm substitutes provide 2.8V fixed output. The 50mV difference represents a 1.7% variation, which is acceptable for applications with ±5% or greater output voltage tolerance specifications.

Q: Are all three parts RoHS3 compliant?

A: Yes. XC6221A28AMR-G, BU28SD2MG-MTR, and BU28TD3WG-TR are all RoHS3 compliant with REACH unaffected status, confirming regulatory alignment for industrial and commercial applications.

Q: Which substitute should be selected for automotive applications?

A: BU28SD2MG-MTR is qualified for automotive use under AEC-Q100 standard. This device is the appropriate selection when automotive qualification is required. BU28TD3WG-TR and XC6221A28AMR-G do not carry automotive qualification designations.

Q: What is the quiescent current difference, and does it matter?

A: XC6221A28AMR-G draws 50µA quiescent current. BU28SD2MG-MTR draws 80µA, and BU28TD3WG-TR draws 60µA. The difference is 10-30µA, which is negligible in most applications. Selection based on quiescent current is appropriate only for ultra-low-power battery-powered designs where every microampere is critical.

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