RP112K291B-TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The RP112K291B-TR is an active linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc. This positive fixed output regulator delivers 150mA at 2.9V with integrated enable control and over-current protection. The device is housed in a 4-UDFN Exposed Pad surface mount package and operates across the industrial temperature range of -40°C to 85°C.

The RP112K291B-TR is classified as an active product with full RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when inventory constraints, lead time requirements, or supply chain considerations necessitate alternative sourcing while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Output Voltage (Fixed)	2.9	V
Output Current	150	mA
Input Voltage (Maximum)	5.25	V
Dropout Voltage @ 150mA	0.28	V
Quiescent Current	100	µA
PSRR (1kHz to 100kHz)	80dB ~ 65dB	dB
Operating Temperature Range	-40 to 85	°C
Package Type	4-UDFN Exposed Pad	DFN(PL)1010-4
Mounting Type	Surface Mount	—
Control Features	Enable	—
Protection Features	Over Current	—

Substitute Part Grouping Explanation

Substitute parts for the RP112K291B-TR are identified based on strict parametric equivalence within the RP112x series. Substitution is valid when all of the following criteria are met:

Critical Matching Parameters:

Output voltage (fixed): 2.9V
Output current capability: 150mA
Maximum input voltage: 5.25V
Dropout voltage: 0.28V @ 150mA
Quiescent current: 100µA
PSRR performance: 80dB ~ 65dB (1kHz ~ 100kHz)
Operating temperature range: -40°C to 85°C
Package configuration: 4-UDFN Exposed Pad (DFN(PL)1010-4)
Control and protection features: Enable control with Over Current protection
Compliance status: RoHS Compliant, MSL 1

Parts meeting these exact specifications are classified as parametric equivalents and direct substitutes. Manufacturer identity remains constant (Nisshinbo Micro Devices Inc.), and all parts operate within identical electrical and thermal boundaries.

Parameter Comparison

Parameter	RP112K291B-TR	RP112K291D-TR	Match Status
Manufacturer	Nisshinbo Micro Devices Inc.	Nisshinbo Micro Devices Inc.	Identical
Series	RP112x	RP112x	Identical
Output Voltage (Fixed)	2.9V	2.9V	Identical
Output Current	150mA	150mA	Identical
Input Voltage (Max)	5.25V	5.25V	Identical
Dropout Voltage @ 150mA	0.28V	0.28V	Identical
Quiescent Current	100µA	100µA	Identical
PSRR (1kHz ~ 100kHz)	80dB ~ 65dB	80dB ~ 65dB	Identical
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Identical
Package / Case	4-UDFN Exposed Pad	4-UDFN Exposed Pad	Identical
Supplier Device Package	DFN(PL)1010-4	DFN(PL)1010-4	Identical
Control Features	Enable	Enable	Identical
Protection Features	Over Current	Over Current	Identical
RoHS Status	RoHS Compliant	RoHS Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

The RP112K291D-TR is a direct parametric equivalent to the RP112K291B-TR. Both devices are manufactured by Nisshinbo Micro Devices Inc. within the RP112x series and share identical electrical specifications, package configuration, and compliance certifications.

Selection Basis:

Both parts maintain active product status with full RoHS compliance and MSL 1 rating. The electrical performance is identical across all specified parameters: output voltage, current delivery, dropout characteristics, quiescent current draw, and PSRR performance. The physical package footprint and pin configuration are identical, enabling direct PCB-level substitution without layout modification.

The RP112K291D-TR variant is suitable for selection when the primary RP112K291B-TR is unavailable due to inventory depletion or extended lead times. No functional or performance degradation occurs with this substitution. Both parts operate within the same temperature range and deliver equivalent protection and control functionality.

Frequently Asked Questions (FAQ)

Q: Can the RP112K291D-TR be used as a direct replacement for the RP112K291B-TR?

A: Yes. The RP112K291D-TR is a parametric equivalent with identical electrical specifications, package configuration, and compliance status. Direct substitution is valid at the PCB level without design modification.

Q: Are there any differences in the package footprint between these parts?

A: No. Both parts use the 4-UDFN Exposed Pad package (DFN(PL)1010-4) with identical pin configuration and land pattern requirements.

Q: Do both parts meet the same compliance and environmental standards?

A: Yes. Both the RP112K291B-TR and RP112K291D-TR are RoHS Compliant with MSL 1 rating (unlimited moisture sensitivity). Both operate across -40°C to 85°C.

Q: What is the difference between the RP112K291B-TR and RP112K291D-TR part numbers?

A: The difference lies in the packaging designation suffix (B versus D). Both variants are manufactured by Nisshinbo Micro Devices Inc. and deliver identical electrical performance and specifications.

Q: Can these parts be used interchangeably in production?

A: Yes. Both parts are active products from the same manufacturer with identical parametric specifications. They are suitable for interchangeable use in manufacturing and assembly processes.

Q: What output voltage and current does this regulator provide?

A: The RP112K291B-TR and RP112K291D-TR both provide a fixed 2.9V output at 150mA maximum output current with a maximum dropout voltage of 0.28V at full load.

Q: Is enable control available on both variants?

A: Yes. Both parts include enable control functionality and integrated over-current protection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message