RP112K331D-TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The RP112K331D-TR is an active linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc. in the Power Management (PMIC) category. This device functions as a positive fixed output regulator delivering 3.3V at 150mA output current with integrated enable control and over-current protection. The part is supplied in Tape & Reel packaging with a 4-UDFN Exposed Pad surface mount configuration.

Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and functional equivalence within the RP10x series family. Alternative models are necessary to address inventory availability, lead time constraints, or specific performance requirements within the allowed parameter range.

Substiute Parts

RP112K331D-TR

Nisshinbo Micro Devices Inc.In Stock: 26315RP112K331D-TR Datasheet

Current PartRFQ

RP109L331D-TR

Nisshinbo Micro Devices Inc.In Stock: 305437RP109L331D-TR Datasheet

Parametric EquivalentRFQ

RP110L331D-TR

Nisshinbo Micro Devices Inc.In Stock: 100121RP110L331D-TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RP112K331D-TR are identified within the Nisshinbo Micro Devices RP10x linear regulator series. Substitution eligibility is determined by the following criteria:

Mandatory Matching Parameters:

• Output voltage: 3.3V fixed
• Output current capability: 150mA
• Input voltage maximum: 5.25V
• Package type: 4-UDFN Exposed Pad (DFN(PL)1010-4)
• Mounting type: Surface Mount
• Control features: Enable function
• Protection features: Over-current protection
• Operating temperature range: -40°C to 85°C
• Compliance: RoHS3, REACH Unaffected

Variable Parameters Allowing Substitution:

• Voltage dropout (Max): 0.28V to 0.35V @ 150mA
• Quiescent current (Iq): 2µA to 100µA
• PSRR: 65dB to 80dB (where specified)

All substitute parts maintain identical functional output specifications and mechanical compatibility while operating within the defined electrical parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

All three parts—RP112K331D-TR, RP109L331D-TR, and RP110L331D-TR—maintain active product status with full RoHS3 compliance and REACH unaffected designation. Each part is suitable for direct substitution in applications requiring a 3.3V, 150mA linear regulator in the 4-UDFN package.

RP112K331D-TR provides the lowest voltage dropout specification at 0.28V @ 150mA, making it optimal for applications with tight input voltage margins or requiring maximum efficiency.

RP109L331D-TR offers a balanced performance profile with 0.32V dropout and moderate quiescent current of 70µA, suitable for general-purpose applications.

RP110L331D-TR features the lowest quiescent current at 2µA, making it the preferred choice for battery-powered or ultra-low-power standby applications where leakage current is a critical design parameter.

Selection between these parts depends on application-specific requirements for dropout voltage, quiescent current, and noise performance characteristics. All parts are mechanically and electrically interchangeable within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can RP109L331D-TR and RP110L331D-TR be used interchangeably with RP112K331D-TR?

A: Yes. All three parts share identical output voltage (3.3V), output current (150mA), input voltage maximum (5.25V), package configuration (4-UDFN Exposed Pad), and operating temperature range (-40°C to 85°C). Differences in dropout voltage and quiescent current fall within acceptable substitution parameters for this regulator category.

Q: What is the primary difference between these three parts?

A: The main differences are voltage dropout and quiescent current specifications. RP112K331D-TR has the lowest dropout (0.28V), RP109L331D-TR provides moderate dropout (0.32V) with moderate quiescent current (70µA), and RP110L331D-TR has the highest dropout (0.35V) but the lowest quiescent current (2µA).

Q: Are there any package or pinout differences between these parts?

A: No. All three parts use the identical 4-UDFN Exposed Pad package (DFN(PL)1010-4) with surface mount configuration. Pinout and mechanical dimensions are identical, allowing direct PCB substitution without layout modifications.

Q: Which part should be selected for a battery-powered application?

A: RP110L331D-TR is recommended for battery-powered applications due to its 2µA quiescent current, which minimizes standby power consumption compared to RP112K331D-TR (100µA) and RP109L331D-TR (70µA).

Q: Which part should be selected for applications with limited input voltage headroom?

A: RP112K331D-TR is recommended for applications with tight input voltage margins, as it provides the lowest dropout voltage specification at 0.28V @ 150mA, allowing operation with lower input voltages while maintaining stable 3.3V output.

Q: Are all parts RoHS3 compliant?

A: Yes. RP112K331D-TR, RP109L331D-TR, and RP110L331D-TR are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level and REACH unaffected status.

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

A: RP112K331D-TR provides the highest PSRR specification at 80dB (1kHz), making it suitable for noise-sensitive applications. RP109L331D-TR offers 75dB PSRR at 1kHz. RP110L331D-TR does not specify PSRR performance.