R1122N251A-TR-FE Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The R1122N251A-TR-FE is an active linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc. This positive fixed output regulator delivers 150mA at 2.5V with a maximum input voltage of 6V and operates across the industrial temperature range of -40°C to 85°C. The device is packaged in SOT-23-5 surface mount configuration and includes enable control and over-current protection features.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or manufacturing transitions while maintaining functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

R1122N251A-TR-FE

Nisshinbo Micro Devices Inc.In Stock: 962R1122N251A-TR-FE Datasheet

Current PartRFQ

XC6215B252MR-G

Torex Semiconductor LtdIn Stock: 2192XC6215B252MR-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are identified based on strict parametric equivalence within the power management PMIC category. The substitution logic for the R1122N251A-TR-FE is based on the following critical parameters:

Electrical Equivalence Criteria:

• Fixed positive output voltage of 2.5V
• Output current rating of 150mA
• Maximum input voltage of 6V
• Operating temperature range of -40°C to 85°C
• Enable control feature
• Over-current protection

Mechanical Equivalence Criteria:

• Surface mount packaging
• SOT-23-5 / SOT-25-5 package family (SC-74A, SOT-753 case designation)

Compliance Criteria:

• RoHS compliance status
• Active product status

The XC6215B252MR-G manufactured by Torex Semiconductor Ltd meets all critical electrical and mechanical parameters for direct substitution. Both devices deliver identical output voltage and current specifications, operate within the same temperature range, include equivalent control and protection features, and utilize compatible surface mount packaging within the SOT-23/SOT-25 family.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: R1122N251A-TR-FE

The R1122N251A-TR-FE is the specified component with active product status and RoHS compliance. This device is recommended for new designs and applications where Nisshinbo sourcing is established.

Substitute Part: XC6215B252MR-G

The XC6215B252MR-G is a parametric equivalent suitable for direct substitution. Both devices are active products with current RoHS compliance certifications. The Torex device maintains identical output voltage and current specifications, equivalent operating temperature range, and compatible surface mount packaging.

Compliance Considerations:

Both parts carry EAR99 export classification and are subject to identical HTSUS commodity codes. The R1122N251A-TR-FE carries RoHS Compliant status, while the XC6215B252MR-G carries ROHS3 Compliant status, indicating enhanced compliance with current regulatory requirements. The XC6215B252MR-G additionally carries REACH Unaffected status.

Electrical Performance Differences:

The XC6215B252MR-G exhibits lower quiescent current (1.5 µA versus 170 µA), which may provide advantages in low-power standby applications. The R1122N251A-TR-FE demonstrates lower dropout voltage at 100mA operation (0.29V versus 0.58V at 150mA), which may be advantageous in applications with limited input voltage headroom.

Frequently Asked Questions (FAQ)

Q: Can the XC6215B252MR-G replace the R1122N251A-TR-FE in existing designs?

A: Yes. Both devices deliver 2.5V at 150mA output, operate across -40°C to 85°C, include enable control and over-current protection, and utilize compatible SOT-23/SOT-25 surface mount packaging. Pin-to-pin compatibility exists within the SOT-23-5 / SOT-25-5 package family.

Q: What are the key differences between these two parts?

A: The primary differences are quiescent current (R1122N251A-TR-FE: 170 µA; XC6215B252MR-G: 1.5 µA) and dropout voltage specifications (R1122N251A-TR-FE: 0.29V @ 100mA; XC6215B252MR-G: 0.58V @ 150mA). Both differences are within acceptable ranges for most applications requiring 2.5V regulation at 150mA.

Q: Are both parts RoHS compliant?

A: Yes. The R1122N251A-TR-FE carries RoHS Compliant status. The XC6215B252MR-G carries ROHS3 Compliant status, indicating compliance with current RoHS regulations. Both parts meet RoHS requirements.

Q: What is the package compatibility between SOT-23-5 and SOT-25-5?

A: Both devices utilize the SC-74A case designation within the SOT-753 family. The SOT-23-5 and SOT-25-5 designations refer to the same physical package footprint used for surface mount assembly. Pin assignments are compatible for direct substitution.

Q: Which part should be selected for low-power applications?

A: The XC6215B252MR-G is preferred for applications prioritizing low quiescent current consumption, as it draws 1.5 µA compared to 170 µA for the R1122N251A-TR-FE. This difference becomes significant in battery-powered or always-on standby applications.

Q: Which part should be selected for applications with limited input voltage headroom?

A: The R1122N251A-TR-FE is preferred for applications requiring minimal dropout voltage, as it specifies 0.29V @ 100mA compared to 0.58V @ 150mA for the XC6215B252MR-G. This advantage applies when input voltage is constrained close to the 2.5V output requirement.

Q: Are both parts available in tape and reel packaging?

A: Yes. Both the R1122N251A-TR-FE and XC6215B252MR-G are supplied in tape and reel (TR) packaging suitable for automated assembly processes.

Q: What is the moisture sensitivity level for both parts?

A: Both devices carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.