RP130K151A-TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The RP130K151A-TR is an active linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc. This positive fixed output regulator delivers 150mA at 1.5V and is housed in a 4-UDFN Exposed Pad surface mount package. The device features integrated enable control and over-current protection, operating across the industrial temperature range of -40°C to 85°C. As an active product with RoHS compliance and unlimited moisture sensitivity rating, substitute parts may be required due to inventory constraints, supply chain disruptions, or design optimization needs. Equivalent alternatives must maintain functional compatibility across critical electrical parameters including output voltage, current capacity, dropout voltage, and package form factor.

Substiute Parts

RP130K151A-TR

Nisshinbo Micro Devices Inc.In Stock: 715RP130K151A-TR Datasheet

Current PartRFQ

XC6504A1519R-G

Torex Semiconductor LtdIn Stock: 1212XC6504A1519R-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RP130K151A-TR is permissible when the alternative part maintains electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Fixed output voltage of 1.5V
• Output current rating of 150mA minimum
• Maximum input voltage of 6V or greater
• Operating temperature range spanning -40°C to 85°C
• Enable control functionality
• Over-current protection capability
• Surface mount package configuration with 4-pin UDFN Exposed Pad footprint

Mechanical Compatibility Criteria:

• 4-UDFN Exposed Pad package form factor
• Tape & Reel packaging for automated assembly

The XC6504A1519R-G from Torex Semiconductor Ltd satisfies these substitution criteria. While the dropout voltage specification differs (1.63V versus 0.81V), this parameter does not preclude substitution when the application's input voltage headroom accommodates the higher dropout characteristic. The quiescent current differential reflects design architecture differences between manufacturers but does not affect functional equivalence for standard linear regulator applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: RP130K151A-TR

The RP130K151A-TR remains the preferred selection when available. This device is manufactured by Nisshinbo Micro Devices Inc. and maintains active product status with full RoHS compliance. The 0.81V dropout voltage specification provides superior efficiency in applications with constrained input voltage headroom. The 80dB PSRR at 1kHz delivers enhanced noise rejection for sensitive analog circuits. Current inventory of 638 pieces supports immediate procurement.

Substitute Part: XC6504A1519R-G

The XC6504A1519R-G from Torex Semiconductor Ltd qualifies as a functional equivalent when the RP130K151A-TR is unavailable. This device maintains identical output voltage and current specifications with full compatibility across the operating temperature range. Both parts feature identical package form factors (4-UDFN Exposed Pad) and control/protection architectures. The substitute exhibits superior quiescent current performance (1.27µA versus 58µA), reducing standby power consumption in battery-powered applications. The higher dropout voltage (1.63V) requires verification that circuit input voltage margins remain adequate for the intended application. Both devices maintain active product status and RoHS compliance. Current inventory of 1,105 pieces supports high-volume procurement.

Selection Criteria:

Choose the RP130K151A-TR when input voltage headroom is limited or when PSRR performance is critical to circuit function. Select the XC6504A1519R-G when quiescent current minimization is a design priority or when the RP130K151A-TR is unavailable. Both parts are suitable for industrial temperature range applications and automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the XC6504A1519R-G directly replace the RP130K151A-TR in existing designs?

A: Direct replacement is permissible when the application's input voltage supply provides sufficient headroom to accommodate the 1.63V dropout voltage of the XC6504A1519R-G. The RP130K151A-TR requires only 0.81V dropout, providing 0.82V additional margin. Both devices share identical 4-UDFN Exposed Pad package footprints and pinouts, enabling direct PCB substitution without layout modifications.

Q: What is the impact of the dropout voltage difference between these parts?

A: Dropout voltage determines the minimum input-to-output voltage differential required for proper regulation. The RP130K151A-TR operates with 0.81V dropout at 150mA, while the XC6504A1519R-G requires 1.63V. In applications with input voltages near 3.3V or lower, the higher dropout of the substitute may cause output voltage degradation under full load conditions. Verify that your circuit's minimum input voltage exceeds the output voltage plus the applicable dropout specification.

Q: Are the package designations DFN(PL)1010-4 and USPQ-4B04 physically compatible?

A: Both designations reference 4-pin UDFN packages with exposed pads. The different supplier nomenclature reflects manufacturer-specific naming conventions. The physical footprints are compatible for PCB assembly purposes. Consult the detailed package drawings from each manufacturer to confirm pad dimensions and placement match your PCB design.

Q: How does the quiescent current difference affect circuit performance?

A: The XC6504A1519R-G exhibits significantly lower quiescent current (1.27µA) compared to the RP130K151A-TR (58µA). This 45-fold reduction benefits battery-powered applications by extending runtime during standby periods. For line-powered applications, this difference is negligible. Both values remain well within acceptable ranges for modern low-power designs.

Q: Are both parts suitable for industrial temperature applications?

A: Yes. Both the RP130K151A-TR and XC6504A1519R-G operate across the identical temperature range of -40°C to 85°C, meeting industrial specifications. Both maintain RoHS compliance and unlimited moisture sensitivity ratings (MSL 1), supporting automated assembly and long-term storage without special handling requirements.

Q: What compliance certifications apply to both parts?

A: The RP130K151A-TR carries RoHS Compliant certification. The XC6504A1519R-G carries ROHS3 Compliant certification, representing an updated RoHS standard revision. Both parts are classified under ECCN EAR99 and HTSUS 8542.39.0001 for export and tariff purposes. The REACH Unaffected status of the XC6504A1519R-G indicates no REACH-regulated substances are present.