R1122N301A-TR-FE Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The R1122N301A-TR-FE is an active linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc. This positive fixed output regulator delivers 150mA at 3V output with a maximum input voltage of 6V. The device is packaged in SOT-23-5 surface mount configuration and includes enable control and over-current protection features.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range. The XC6504A301MR-G from Torex Semiconductor Ltd provides functional equivalence for applications requiring this voltage regulation topology.

Substiute Parts

R1122N301A-TR-FE

Nisshinbo Micro Devices Inc.In Stock: 846R1122N301A-TR-FE Datasheet

Current PartRFQ

XC6504A301MR-G

Torex Semiconductor LtdIn Stock: 29298XC6504A301MR-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the R1122N301A-TR-FE is determined by the following critical parameters:

1. Output Voltage: Fixed 3V output is required
2. Output Current Capability: Minimum 150mA continuous output current
3. Input Voltage Range: Maximum input voltage of 6V or greater
4. Output Configuration: Positive output topology
5. Package Compatibility: SOT-23-5 / SC-74A surface mount package
6. Control and Protection: Enable control and over-current protection features present
7. Operating Temperature: -40°C to 85°C range support
8. Product Status: Active status with current manufacturing availability

The XC6504A301MR-G meets all these criteria and is classified as a parametric equivalent. Both devices share identical output voltage, output current rating, input voltage maximum, package footprint, control features, protection features, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

R1122N301A-TR-FE (Primary Part)

The R1122N301A-TR-FE is the original specified component with active product status and RoHS compliance certification. This part is recommended for new designs when supply is available. The device demonstrates lower quiescent current at 170 µA and provides specified PSRR performance of 80dB at 1kHz, which may be relevant for noise-sensitive applications.

XC6504A301MR-G (Substitute Part)

The XC6504A301MR-G is qualified as a parametric equivalent substitute. This Torex device maintains identical output voltage, output current rating, input voltage maximum, package footprint, control features, and protection features. The substitute part carries ROHS3 compliance and is currently in active production with higher inventory availability (29,200 pieces in stock versus 805 pieces for the primary part).

Differences in quiescent current (1.27 µA versus 170 µA) and voltage dropout characteristics (0.67V @ 150mA versus 0.26V @ 100mA) should be evaluated against specific application requirements. The substitute part exhibits significantly lower quiescent current, which may provide advantages in battery-powered or low-power standby applications.

Both parts are classified as EAR99 export control items and carry identical HTSUS commodity codes.

Frequently Asked Questions (FAQ)

Q: Are the R1122N301A-TR-FE and XC6504A301MR-G pin-compatible?

A: Both devices use the SOT-23-5 / SC-74A package with identical pin assignments for this voltage regulator topology. Pin compatibility is maintained for standard linear regulator pinouts (input, output, ground, enable, and feedback/adjustment).

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

A: The supplier device package designation differs between the two parts (SOT-23-5 for Nisshinbo versus SOT-25-5 for Torex), but both resolve to the same physical SC-74A / SOT-753 package footprint. The mechanical and electrical compatibility is maintained for PCB assembly.

Q: How do the quiescent current differences affect circuit design?

A: The XC6504A301MR-G exhibits quiescent current of 1.27 µA compared to 170 µA for the R1122N301A-TR-FE. In applications with continuous operation, this represents a 99.3% reduction in standby power consumption. For applications requiring extended battery life or low-power operation, the substitute part provides measurable power efficiency advantages.

Q: What are the voltage dropout implications for each part?

A: The R1122N301A-TR-FE specifies 0.26V dropout at 100mA load current. The XC6504A301MR-G specifies 0.67V dropout at 150mA load current. Applications operating near the 6V maximum input voltage limit should account for these dropout characteristics when calculating minimum input voltage requirements.

Q: Are both parts suitable for the same operating temperature range?

A: Both the R1122N301A-TR-FE and XC6504A301MR-G support the identical operating temperature range of -40°C to 85°C. Temperature performance is equivalent across both devices.

Q: What compliance certifications apply to each part?

A: The R1122N301A-TR-FE carries RoHS compliance certification. The XC6504A301MR-G carries ROHS3 compliance certification and is REACH unaffected. Both parts are classified under ECCN EAR99 and HTSUS code 8542.39.0001.

Q: Can the XC6504A301MR-G be used as a direct replacement in existing designs?

A: The XC6504A301MR-G maintains electrical and mechanical compatibility with the R1122N301A-TR-FE across all critical parameters: output voltage, output current, input voltage range, package footprint, control features, and protection features. Direct substitution is supported for applications where the specified parameter differences do not create design constraints.