R1111N151A-TR-FE Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The R1111N151A-TR-FE 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 packaged in SOT-23-5 surface mount configuration. The device is designed for applications requiring stable low-voltage power delivery with integrated over-current protection and enable control features.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across all critical parameters. The R1121N151B-TR-FE serves as a parametric equivalent with identical functional specifications and packaging.

Substiute Parts

R1111N151A-TR-FE

Nisshinbo Micro Devices Inc.In Stock: 980R1111N151A-TR-FE Datasheet

Current PartRFQ

R1121N151B-TR-FE

Nisshinbo Micro Devices Inc.In Stock: 895R1121N151B-TR-FE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the R1111N151A-TR-FE is determined by matching the following critical parameters:

• Output Voltage (Fixed): 1.5V
• Output Current Capability: 150mA
• Input Voltage (Maximum): 8V
• Quiescent Current: 70µA
• PSRR Performance: 70dB at 1kHz
• Operating Temperature Range: -40°C to 85°C
• Package Configuration: SOT-23-5 (SC-74A)
• Mounting Type: Surface Mount
• Control Features: Enable function
• Protection Features: Over-current protection
• Regulatory Compliance: RoHS Compliant, MSL Level 1

The R1121N151B-TR-FE meets all substitution criteria with identical electrical specifications and mechanical compatibility. Both devices are manufactured by Nisshinbo Micro Devices Inc. and maintain active product status.

Parameter Comparison

Engineering Selection Recommendations

Both the R1111N151A-TR-FE and R1121N151B-TR-FE are active products with full RoHS compliance and MSL Level 1 rating. Selection between these devices is based on availability and supply chain requirements rather than functional differentiation.

The R1111N151A-TR-FE is the primary specification with 908 units in stock. The R1121N151B-TR-FE serves as a direct parametric equivalent with 883 units available. Both devices are supplied in Tape & Reel packaging suitable for automated assembly processes.

Component selection should prioritize availability and lead time requirements. No functional performance trade-offs exist between the two devices. PCB layout and thermal management considerations remain identical due to matching package geometry and electrical characteristics.

Frequently Asked Questions (FAQ)

Q: Can the R1121N151B-TR-FE replace the R1111N151A-TR-FE in existing designs?

A: Yes. The R1121N151B-TR-FE is a parametric equivalent with identical output voltage, current rating, input voltage range, quiescent current, PSRR performance, operating temperature range, and package configuration. Direct substitution is supported without circuit modification.

Q: Are the package dimensions identical between these devices?

A: Yes. Both devices use the SOT-23-5 package (SC-74A, SOT-753) with identical pin configuration and mechanical footprint. PCB layout and assembly processes require no modification.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by matching output voltage (1.5V fixed), output current (150mA), input voltage maximum (8V), quiescent current (70µA), PSRR (70dB at 1kHz), operating temperature range (-40°C to 85°C), package type (SOT-23-5), control features (Enable), and protection features (Over-current).

Q: Do both devices have identical compliance certifications?

A: Yes. Both the R1111N151A-TR-FE and R1121N151B-TR-FE are RoHS Compliant with MSL Level 1 rating. ECCN and HTSUS classifications are identical.

Q: What is the difference between the R1111N and R1121N series designations?

A: The series designation reflects internal product line differentiation within Nisshinbo Micro Devices Inc. Both series deliver identical electrical performance and mechanical compatibility for this 1.5V, 150mA output configuration.

Q: Are there any thermal or reliability differences between these devices?

A: No thermal or reliability parameters are provided in the specification data. Both devices operate across the identical temperature range (-40°C to 85°C) with matching quiescent current and protection features.

Q: What packaging format is supplied?

A: Both devices are supplied in Tape & Reel (TR) format suitable for automated pick-and-place assembly. This packaging format is standard for surface mount SOT-23-5 components.