RP131K331B-TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The RP131K331B-TR is an active linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc., designed for positive fixed 3.3V output at 1A current capacity. This Surface Mount device operates across the -40°C to 85°C temperature range and includes integrated over-current and over-temperature protection features. The part is supplied in Tape & Reel packaging with 10,200 units currently in stock.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or when parametric compatibility permits cross-platform component selection within the same functional category.

Substiute Parts

RP131K331B-TR

Nisshinbo Micro Devices Inc.In Stock: 10245RP131K331B-TR Datasheet

Current PartRFQ

RP132K331B-TR

Nisshinbo Micro Devices Inc.In Stock: 19319RP132K331B-TR Datasheet

Parametric EquivalentRFQ

XC6220B331ER-G

Torex Semiconductor LtdIn Stock: 20428XC6220B331ER-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RP131K331B-TR are identified based on strict parametric alignment within the Power Management (PMIC) category. Substitution eligibility is determined by the following critical parameters:

Primary Matching Criteria:

• Fixed output voltage of 3.3V
• Output current rating of 1A
• Maximum input voltage compatibility (6.0V to 6.5V range)
• Voltage dropout performance at rated current
• Operating temperature range of -40°C to 85°C
• Surface Mount packaging in 6-pin UFDFN configuration
• Integrated over-current and over-temperature protection
• Enable control feature availability

Secondary Compatibility Factors:

• Quiescent current performance
• PSRR specification at 1kHz
• RoHS and environmental compliance status
• Moisture Sensitivity Level (MSL) rating
• Tape & Reel packaging format

Parts meeting all primary criteria and maintaining compatibility across secondary factors are classified as parametric equivalents suitable for direct substitution in circuit designs where the RP131K331B-TR is specified.

Parameter Comparison

Engineering Selection Recommendations

RP132K331B-TR (Nisshinbo Micro Devices Inc.)

The RP132K331B-TR is a parametric equivalent within the same manufacturer's product family. This part maintains identical output voltage, current rating, input voltage maximum, and operating temperature specifications. The voltage dropout performance is marginally higher at 0.68V compared to 0.65V, representing a 0.03V differential. Quiescent current is slightly lower at 85µA versus 90µA. Both parts carry ROHS3 compliance certification and unlimited MSL rating. This substitute is suitable for applications where Nisshinbo device continuity is preferred and the minor dropout variance is acceptable within circuit design margins.

XC6220B331ER-G (Torex Semiconductor Ltd)

The XC6220B331ER-G is a cross-manufacturer parametric equivalent from Torex Semiconductor Ltd. This part meets the core functional requirements with identical 3.3V output and 1A current capacity across the -40°C to 85°C operating range. The maximum input voltage is specified at 6.0V, which is 0.5V lower than the RP131K331B-TR. Voltage dropout performance is comparable at 0.655V. A significant distinction is the quiescent current specification of 18µA, substantially lower than the RP131K331B-TR at 90µA, providing improved efficiency in low-power standby conditions. PSRR is specified at 50dB versus 70dB. This substitute is applicable in designs where lower quiescent current consumption is beneficial and the reduced maximum input voltage does not conflict with circuit requirements.

All three parts maintain active product status, carry appropriate environmental compliance certifications, and are available in current inventory quantities suitable for production deployment.

Frequently Asked Questions (FAQ)

Q: Can the RP132K331B-TR be used as a direct replacement for the RP131K331B-TR?

A: Yes. Both parts are manufactured by Nisshinbo Micro Devices Inc. and share identical output voltage (3.3V), output current (1A), input voltage maximum (6.5V), operating temperature range (-40°C to 85°C), package configuration (6-UFDFN), and protection features. The voltage dropout specification differs by 0.03V (0.68V versus 0.65V), which is within typical circuit design tolerances. Both parts carry ROHS3 compliance and unlimited MSL rating.

Q: What are the key differences between the Nisshinbo RP131K331B-TR and the Torex XC6220B331ER-G?

A: The primary differences are: (1) Maximum input voltage is 6.0V for the XC6220B331ER-G versus 6.5V for the RP131K331B-TR; (2) Quiescent current is significantly lower at 18µA for the XC6220B331ER-G compared to 90µA for the RP131K331B-TR; (3) PSRR is 50dB for the XC6220B331ER-G versus 70dB for the RP131K331B-TR. All other critical parameters including output voltage, current rating, temperature range, package type, and protection features are equivalent.

Q: Is the XC6220B331ER-G suitable for applications requiring maximum input voltage above 6.0V?

A: No. The XC6220B331ER-G is specified with a maximum input voltage of 6.0V. Applications requiring input voltage tolerance up to 6.5V must use the RP131K331B-TR or RP132K331B-TR. Exceeding the maximum input voltage specification will result in device damage or failure.

Q: Are all three parts available in Tape & Reel packaging?

A: Yes. The RP131K331B-TR, RP132K331B-TR, and XC6220B331ER-G are all supplied in Tape & Reel (TR) packaging format suitable for automated assembly processes.

Q: What is the significance of the quiescent current difference between these parts?

A: Quiescent current represents the device's current consumption when delivering minimal or no load current. The RP131K331B-TR and RP132K331B-TR specify 90µA and 85µA respectively, while the XC6220B331ER-G specifies 18µA. In battery-powered or low-power standby applications, the XC6220B331ER-G provides superior efficiency. In continuous-load applications, this difference has minimal impact on overall system power consumption.

Q: Do all three parts include the same protection features?

A: Yes. The RP131K331B-TR, RP132K331B-TR, and XC6220B331ER-G all include integrated over-current and over-temperature protection features. All parts include Enable control functionality.

Q: What is the MSL rating and why is it important?

A: All three parts carry MSL (Moisture Sensitivity Level) rating of 1, which indicates unlimited shelf life without moisture exposure restrictions. This simplifies inventory management and reduces risk of moisture-induced failures during storage and handling.

Q: Are there any compliance or certification differences between these parts?

A: The RP131K331B-TR carries RoHS Compliant certification. The RP132K331B-TR and XC6220B331ER-G both carry ROHS3 Compliant certification and REACH Unaffected status. All three parts are classified under ECCN EAR99 and HTSUS 8542.39.0001. ROHS3 represents an updated compliance standard and is generally preferred for new designs.