RP110L331D-TR Equivalent & Substitute Parts

Part Overview

The RP110L331D-TR is a linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc., classified as a Power Management (PMIC) component. This device delivers a fixed positive 3.3V output at 150mA with a maximum dropout voltage of 0.35V, housed in a 4-UDFN Exposed Pad surface mount package. The part is Active in product status and maintains full RoHS3 compliance with MSL Level 1 rating.

Equivalent and substitute parts are identified to address inventory availability, design flexibility, and performance optimization across the RP110x, RP109x, and RP112x series from Nisshinbo Micro Devices, as well as cross-manufacturer alternatives from STMicroelectronics. Substitution is based strictly on electrical parameters, package compatibility, and regulatory compliance.

Substiute Parts

RP110L331D-TR

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

Current PartRFQ

RP109L331D-TR

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

Parametric EquivalentRFQ

RP112K331D-TR

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

Parametric EquivalentRFQ

LD39020DTPU33R

STMicroelectronicsIn Stock: 6140LD39020DTPU33R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the RP110L331D-TR is based on the following criteria:

Parametric Equivalents (Nisshinbo Micro Devices Series): Substitute parts RP109L331D-TR and RP112K331D-TR maintain identical electrical specifications for output voltage (3.3V), output current (150mA), maximum input voltage (5.25V), package type (4-UDFN Exposed Pad), control features (Enable), protection features (Over Current), operating temperature range (-40°C ~ 85°C), and regulatory compliance (ROHS3, MSL 1). These parts differ in quiescent current, dropout voltage, and PSRR characteristics, which are secondary performance parameters that do not prevent functional substitution in applications where the primary output specifications are met.

Similar Manufacturer Part (Cross-Manufacturer Alternative): The LD39020DTPU33R from STMicroelectronics is classified as a similar part rather than a parametric equivalent due to differences in output current (200mA vs. 150mA), maximum input voltage (5.5V vs. 5.25V), package designation (4-DFN vs. 4-UDFN), and operating temperature range (TJ -40°C ~ 125°C vs. TA -40°C ~ 85°C). This part is suitable for applications requiring higher current capacity or extended temperature performance while maintaining the 3.3V fixed output voltage and surface mount configuration.

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalents within Nisshinbo Micro Devices Series:

The RP109L331D-TR and RP112K331D-TR are direct parametric equivalents to the RP110L331D-TR for applications requiring a 3.3V fixed output at 150mA in a 4-UDFN Exposed Pad package. All three parts maintain Active product status, ROHS3 compliance, and MSL Level 1 rating. Selection between these three parts is determined by secondary performance characteristics:

• RP110L331D-TR provides the lowest quiescent current at 2 µA, suitable for battery-powered or ultra-low-power applications.
• RP109L331D-TR offers a reduced dropout voltage of 0.32V and includes PSRR specification of 75dB at 1kHz, appropriate for noise-sensitive analog circuits.
• RP112K331D-TR delivers the lowest dropout voltage at 0.28V with enhanced PSRR performance (80dB ~ 65dB across 1kHz ~ 100kHz), optimized for applications with tight input voltage margins or requiring superior power supply rejection.

Cross-Manufacturer Alternative:

The LD39020DTPU33R from STMicroelectronics is suitable for applications where higher output current capacity (200mA) or extended operating temperature range (up to 125°C junction temperature) is required. This part maintains the 3.3V fixed output voltage and surface mount configuration. The package designation differs (4-DFN vs. 4-UDFN), requiring PCB layout verification. Additional protection features (Over Temperature and Soft Start) provide enhanced reliability in thermally demanding environments. All regulatory compliance requirements (ROHS3, MSL 1) are maintained.

Frequently Asked Questions (FAQ)

Q: Can RP109L331D-TR or RP112K331D-TR be used as direct replacements for RP110L331D-TR?

A: Yes. Both parts are parametric equivalents with identical output voltage (3.3V), output current (150mA), maximum input voltage (5.25V), package type (4-UDFN Exposed Pad), and operating temperature range (-40°C ~ 85°C). They differ in quiescent current and dropout voltage, which are secondary performance parameters. Selection depends on application requirements for power consumption and input voltage headroom.

Q: What is the key difference between RP110L331D-TR and LD39020DTPU33R?

A: The primary differences are output current capacity (150mA vs. 200mA), maximum input voltage (5.25V vs. 5.5V), package type (4-UDFN vs. 4-DFN), and operating temperature range (TA -40°C ~ 85°C vs. TJ -40°C ~ 125°C). The LD39020DTPU33R is suitable for applications requiring higher current delivery or extended temperature performance. PCB layout must be verified due to package differences.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts—RP109L331D-TR, RP112K331D-TR, and LD39020DTPU33R—are ROHS3 compliant with MSL Level 1 rating, meeting the same regulatory requirements as the RP110L331D-TR.

Q: Which substitute part has the lowest quiescent current?

A: The RP110L331D-TR maintains the lowest quiescent current at 2 µA. Among substitutes, the LD39020DTPU33R provides 40 µA, while RP109L331D-TR and RP112K331D-TR provide 70 µA and 100 µA respectively.

Q: Can LD39020DTPU33R be used in applications designed for RP110L331D-TR without circuit modifications?

A: The LD39020DTPU33R can replace RP110L331D-TR functionally for 3.3V regulation, but package differences (4-DFN vs. 4-UDFN) require PCB layout verification. The higher output current capacity (200mA) and extended temperature range are beneficial for demanding applications. Pinout compatibility must be confirmed before implementation.

Q: What is the significance of dropout voltage differences among the substitute parts?

A: Dropout voltage determines the minimum input voltage required to maintain regulated output. RP112K331D-TR offers the lowest dropout at 0.28V, followed by RP109L331D-TR at 0.32V, and RP110L331D-TR at 0.35V. Applications with tight input voltage margins benefit from lower dropout voltage specifications.

Q: Are there packaging differences that affect PCB design?

A: RP110L331D-TR, RP109L331D-TR, and RP112K331D-TR all use 4-UDFN Exposed Pad packages and are footprint-compatible. The LD39020DTPU33R uses a 4-DFN (1x1) package, which differs in physical dimensions and requires PCB layout verification before substitution.