R1172N331A-TR-FE Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The R1172N331A-TR-FE is an active linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc. This positive fixed output regulator delivers 1A at 3.3V with a maximum dropout voltage of 0.18V at full load current. The device integrates over-current and over-temperature protection features with an enable control input, housed in a SOT-23-5 surface mount package.

Equivalent and substitute parts are identified to address component availability, supply chain continuity, and inventory optimization while maintaining electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

R1172N331A-TR-FE

Nisshinbo Micro Devices Inc.In Stock: 1011R1172N331A-TR-FE Datasheet

Current PartRFQ

R1172N331D-TR-FE

Nisshinbo Micro Devices Inc.In Stock: 2001R1172N331D-TR-FE Datasheet

Parametric EquivalentRFQ

XC6220B331MR-G

Torex Semiconductor LtdIn Stock: 35150XC6220B331MR-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified based on strict electrical and mechanical parameter alignment with the R1172N331A-TR-FE. The substitution criteria are:

Primary Equivalence Criteria:

• Fixed output voltage of 3.3V
• Output current rating of 1A
• Maximum input voltage of 6V
• Operating temperature range of -40°C to 85°C
• Surface mount packaging (SOT-23-5 or SOT-25-5)
• Enable control feature
• Over-current and over-temperature protection

Parametric Equivalent Classification: Parts meeting all primary criteria with identical or superior electrical performance characteristics are classified as parametric equivalents. Variations in dropout voltage, quiescent current, and PSRR are noted but do not disqualify substitution when the part remains functionally compatible within the application's design margins.

Parameter Comparison

Engineering Selection Recommendations

R1172N331D-TR-FE (Nisshinbo Micro Devices Inc.)

This part is a parametric equivalent within the same manufacturer series. It maintains identical output voltage, current rating, input voltage maximum, operating temperature range, and control/protection features. The R1172N331D-TR-FE carries ROHS3 compliance and REACH Unaffected status, providing enhanced regulatory alignment. This substitute is suitable for direct replacement in applications where the R1172N331A-TR-FE is specified, with no circuit modifications required.

XC6220B331MR-G (Torex Semiconductor Ltd)

This part meets all primary electrical and mechanical substitution criteria with identical output voltage, current rating, input voltage maximum, and operating temperature range. The XC6220B331MR-G features superior quiescent current performance (18µA versus 100µA), reducing standby power consumption. However, the dropout voltage is higher at 0.655V compared to 0.18V, and PSRR is lower at 50dB versus 70dB. The package designation differs (SOT-25-5 versus SOT-23-5), requiring PCB layout verification for pin compatibility. This substitute is applicable in applications where the higher dropout voltage and lower PSRR are acceptable within design margins. The XC6220B331MR-G carries ROHS3 compliance and REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q: Can R1172N331D-TR-FE be used as a direct replacement for R1172N331A-TR-FE?

A: Yes. Both parts are from the same manufacturer series with identical electrical specifications for output voltage (3.3V), output current (1A), input voltage maximum (6V), operating temperature range (-40°C to 85°C), and protection/control features. No circuit modifications are required.

Q: What is the primary difference between R1172N331A-TR-FE and XC6220B331MR-G?

A: The primary differences are dropout voltage (0.18V versus 0.655V at 1A), quiescent current (100µA versus 18µA), PSRR (70dB versus 50dB at 1kHz), and package type (SOT-23-5 versus SOT-25-5). All three parts deliver 1A at 3.3V with identical input voltage maximum and operating temperature range.

Q: Is the XC6220B331MR-G package compatible with the R1172N331A-TR-FE PCB layout?

A: Both parts use 5-pin surface mount packages (SOT-23-5 and SOT-25-5 respectively). Pin configuration and spacing differ between these package types. PCB layout verification is required before substitution to confirm footprint compatibility.

Q: Which substitute part has the lowest power consumption in standby mode?

A: The XC6220B331MR-G has a quiescent current of 18µA, compared to 100µA for both R1172N331A-TR-FE and R1172N331D-TR-FE. This results in lower standby power consumption when the regulator is enabled but delivering minimal load current.

Q: Are all three parts RoHS compliant?

A: Yes. R1172N331A-TR-FE is RoHS Compliant. R1172N331D-TR-FE and XC6220B331MR-G are both ROHS3 Compliant. All three parts have MSL Rating 1 (Unlimited moisture sensitivity level).

Q: What is the impact of higher dropout voltage in the XC6220B331MR-G?

A: The XC6220B331MR-G requires 0.655V headroom between input and output voltages at 1A load, compared to 0.18V for the R1172N331A-TR-FE. Applications with tight input voltage margins or low supply voltages may not accommodate this higher dropout voltage. Verify that the minimum input voltage in your application exceeds the output voltage plus the regulator's dropout voltage.

Q: Can these parts be used interchangeably in high-noise environments?

A: The R1172N331A-TR-FE and R1172N331D-TR-FE both provide 70dB PSRR at 1kHz, offering superior noise rejection compared to the XC6220B331MR-G at 50dB. For applications requiring maximum power supply rejection, the Nisshinbo parts are preferred.