R1111N301A-TR-FE Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The R1111N301A-TR-FE is an active linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc. This positive fixed output regulator delivers 150mA at 3V output with a maximum dropout voltage of 0.3V at 100mA. The device is packaged in SOT-23-5 surface mount configuration and includes enable control and over-current protection features. The part is RoHS compliant and classified as Moisture Sensitivity Level 1 (unlimited shelf life).

Substitute parts are identified when they maintain identical electrical specifications, output configuration, current ratings, voltage parameters, protection features, and physical packaging while originating from the same manufacturer series. Alternative sourcing becomes necessary due to inventory availability, supply chain considerations, or procurement lead time requirements.

Substiute Parts

R1111N301A-TR-FE

Nisshinbo Micro Devices Inc.In Stock: 823R1111N301A-TR-FE Datasheet

Current PartRFQ

R1111N301B-TR-FE

Nisshinbo Micro Devices Inc.In Stock: 2893R1111N301B-TR-FE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the R1111N301A-TR-FE are identified based on strict parametric equivalence within the R1111N series. The substitution criteria are defined by the following key parameters that must remain identical:

Electrical Specifications:

• Output voltage: 3V fixed
• Maximum input voltage: 8V
• Output current: 150mA
• Dropout voltage: 0.3V @ 100mA
• Quiescent current: 70 µA
• PSRR: 70dB (1kHz)

Functional Features:

• Output configuration: Positive
• Number of regulators: 1
• Control features: Enable function
• Protection features: Over-current protection

Physical & Environmental:

• Package type: SOT-23-5 (SC-74A, SOT-753)
• Mounting type: Surface mount
• Operating temperature: -40°C ~ 85°C
• RoHS compliance: Required
• MSL rating: 1 (Unlimited)

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes. Variations in manufacturing date codes or tape & reel batch designations do not affect substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

The R1111N301B-TR-FE is a direct parametric equivalent to the R1111N301A-TR-FE. Both parts are manufactured by Nisshinbo Micro Devices Inc., maintain active product status, and carry identical electrical, functional, and environmental specifications. Both parts are RoHS compliant and carry MSL Level 1 rating.

Selection between these parts is based on availability and procurement requirements. The R1111N301B-TR-FE currently maintains higher inventory levels (2800 pcs) compared to the R1111N301A-TR-FE (735 pcs), which may influence lead time and supply chain considerations. Both parts are suitable for direct substitution in applications requiring a 3V, 150mA positive fixed output linear regulator with enable control and over-current protection in SOT-23-5 packaging.

Frequently Asked Questions (FAQ)

Q: Can R1111N301B-TR-FE replace R1111N301A-TR-FE in existing designs?

A: Yes. The R1111N301B-TR-FE is a parametric equivalent with identical electrical specifications, output voltage, current ratings, dropout voltage, protection features, and physical packaging. No design modifications are required.

Q: Are there differences in the SOT-23-5 package between these parts?

A: No. Both parts use the identical SOT-23-5 package (SC-74A, SOT-753 case designation). Pin configuration, lead spacing, and mounting footprint are identical.

Q: Do both parts support the same operating temperature range?

A: Yes. Both parts operate across the identical temperature range of -40°C to 85°C.

Q: What is the significance of the different part number suffixes (A vs. B)?

A: The suffix designates different manufacturing batches or date codes from Nisshinbo Micro Devices Inc. The electrical and functional specifications remain identical across both variants.

Q: Are both parts RoHS compliant?

A: Yes. Both R1111N301A-TR-FE and R1111N301B-TR-FE are RoHS compliant and carry MSL Level 1 rating (unlimited shelf life).

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. Both parts are surface mount devices in SOT-23-5 packaging with identical pin assignments, electrical characteristics, and functional features. They are fully interchangeable at the component level.

Q: What is the maximum input voltage for both parts?

A: Both parts accept a maximum input voltage of 8V and deliver a fixed 3V output at up to 150mA with a maximum dropout voltage of 0.3V at 100mA.

Q: Do both parts include enable control functionality?

A: Yes. Both parts include enable control features and over-current protection as standard functions.