R1172N331B-TR-FE Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The R1172N331B-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 is housed in a SOT-23-5 surface mount package and includes integrated over-current and over-temperature protection with an enable control feature.

Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or equivalent performance specifications across the R1172x series and compatible cross-manufacturer alternatives.

Substiute Parts

R1172N331B-TR-FE

Nisshinbo Micro Devices Inc.In Stock: 1166R1172N331B-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 for the R1172N331B-TR-FE are classified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Output voltage: 3.3V fixed
• Output current capability: 1A minimum
• Input voltage maximum: 6V
• Package type: SOT-23-5 or SOT-25-5 (pin-compatible surface mount)
• Protection features: Over-current and over-temperature protection
• Control features: Enable function
• Operating temperature range: -40°C to 85°C
• Output configuration: Positive fixed

Parametric Equivalent Classification:

The R1172N331D-TR-FE represents a direct series variant within the same R1172x family from Nisshinbo Micro Devices Inc., maintaining identical electrical specifications and package configuration with equivalent performance characteristics.

The XC6220B331MR-G from Torex Semiconductor Ltd provides functional equivalence across all critical parameters including output voltage, current rating, input voltage range, and operating temperature. This device operates within the same thermal and electrical envelope despite differences in secondary parameters such as dropout voltage and quiescent current.

Parameter Comparison

Engineering Selection Recommendations

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

This substitute is a direct equivalent within the R1172x product family. Both devices share identical electrical specifications, package configuration, and control/protection features. The R1172N331D-TR-FE carries ROHS3 compliance certification and REACH unaffected status, providing enhanced regulatory documentation. Selection of this variant is appropriate when supply availability of the R1172N331B-TR-FE is constrained while maintaining equivalent circuit performance.

XC6220B331MR-G (Torex Semiconductor Ltd)

This cross-manufacturer substitute meets all critical functional requirements: 3.3V fixed output, 1A current capability, 6V maximum input voltage, and identical operating temperature range. The device includes equivalent protection and control features. The XC6220B331MR-G exhibits lower quiescent current (18µA versus 100µA) and higher dropout voltage (0.655V versus 0.18V) compared to the primary part. This substitute is suitable for applications where supply chain diversification is required or where the lower quiescent current provides system-level advantages. The SOT-25-5 package maintains pin compatibility with SOT-23-5 configurations in standard PCB layouts. ROHS3 compliance and REACH unaffected status are confirmed.

Frequently Asked Questions (FAQ)

Q: Can the R1172N331D-TR-FE be used as a direct replacement for the R1172N331B-TR-FE?

A: Yes. Both devices are members of the R1172x series from Nisshinbo Micro Devices Inc. and share identical electrical specifications including output voltage, current rating, input voltage range, operating temperature, and package type. No circuit modifications are required.

Q: What are the key differences between the R1172N331B-TR-FE and XC6220B331MR-G?

A: The primary differences are manufacturer (Nisshinbo versus Torex), dropout voltage (0.18V versus 0.655V at 1A), quiescent current (100µA versus 18µA), and PSRR (70dB versus 50dB at 1kHz). All critical parameters including output voltage, current, input voltage range, temperature range, and protection features are equivalent.

Q: Are the SOT-23-5 and SOT-25-5 packages pin-compatible?

A: Both packages are five-pin surface mount configurations with identical pin assignments for linear regulator applications. Standard PCB layouts accommodate both package types without modification.

Q: Which substitute should be selected for lowest power consumption?

A: The XC6220B331MR-G exhibits lower quiescent current at 18µA compared to 100µA for the Nisshinbo devices, resulting in reduced standby power consumption in applications where the regulator remains enabled during low-load conditions.

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

A: The XC6220B331MR-G exhibits 0.655V dropout at 1A compared to 0.18V for the R1172N331B-TR-FE. Applications requiring operation with input voltages close to the 3.3V output level should verify that the higher dropout voltage does not violate minimum input voltage requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. The R1172N331B-TR-FE carries RoHS compliance certification. Both substitute parts (R1172N331D-TR-FE and XC6220B331MR-G) carry ROHS3 compliance certification, meeting current regulatory requirements.

Q: Can the XC6220B331MR-G be used in high-noise environments?

A: The XC6220B331MR-G provides 50dB PSRR at 1kHz compared to 70dB for the R1172N331B-TR-FE. Applications requiring superior power supply rejection ratio should retain the original Nisshinbo device or verify that the lower PSRR specification meets system noise performance requirements.