NJU7261U50 Equivalent & Substitute Parts

Part Overview

The NJU7261U50 is a boost switching regulator IC manufactured by Nisshinbo Micro Devices Inc., designed to provide a fixed 5V output with 250mA switching current capacity. This component operates as a step-up converter, accepting input voltages between 1V and 5V and delivering regulated 5V output in a compact SOT-89-5/6 surface mount package.

The NJU7261U50 is classified as an obsolete product. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

NJU7261U50

Nisshinbo Micro Devices Inc.In Stock: 2094NJU7261U50 Datasheet

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TC115501EMTTR

Microchip TechnologyIn Stock: 2323TC115501EMTTR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NJU7261U50 is determined by strict alignment of the following critical parameters:

Topology & Function: Both the main part and substitute must operate as boost (step-up) switching regulators with positive output configuration and fixed 5V output voltage.

Package & Mounting: The substitute must use the SOT-89-5/6 surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Output Characteristics: The substitute must deliver a fixed 5V output with positive polarity and single output configuration.

Electrical Operating Range: The substitute must accept input voltage ranges compatible with the application requirements and operate within specified temperature ranges.

Regulatory Compliance: The substitute must maintain RoHS compliance and REACH unaffected status to satisfy environmental and regulatory requirements.

The TC115501EMTTR from Microchip Technology qualifies as a substitute based on these criteria. While it features a lower output current rating (100mA versus 250mA), it maintains identical package, topology, output voltage, and regulatory compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The TC115501EMTTR is suitable as a substitute when the application load current does not exceed 100mA. The identical SOT-89-5/6 package, fixed 5V output, and boost topology ensure mechanical and functional compatibility. The TC115501EMTTR offers superior product status (Active versus Obsolete), enhanced temperature operating range (-40°C to 85°C), and improved moisture sensitivity rating (MSL 1 versus MSL 2).

For Higher Current Applications: If the application requires the full 250mA output current of the NJU7261U50, the TC115501EMTTR cannot serve as a direct substitute due to its 100mA current limitation. Alternative boost regulators with 250mA or greater output current capacity and SOT-89-5/6 packaging must be evaluated.

Compliance Considerations: Both parts maintain RoHS compliance and REACH unaffected status. The TC115501EMTTR provides ROHS3 compliance, representing current regulatory alignment. The TC115501EMTTR's MSL 1 rating (unlimited shelf life) offers superior handling and storage advantages compared to the NJU7261U50's MSL 2 rating (1-year shelf life).

Supply Chain Status: The TC115501EMTTR is an active product with established supply chain availability, whereas the NJU7261U50 is obsolete. Transitioning to the TC115501EMTTR supports long-term design sustainability and reduces obsolescence risk.

Frequently Asked Questions (FAQ)

Q: Can the TC115501EMTTR directly replace the NJU7261U50 in all applications?

A: The TC115501EMTTR is mechanically and functionally compatible (identical package, topology, and 5V output). However, substitution is limited to applications where the load current does not exceed 100mA. The NJU7261U50 supports 250mA output current, while the TC115501EMTTR supports only 100mA. Verify your application's maximum current requirement before substitution.

Q: What are the key differences between these two parts?

A: The primary differences are output current capacity (250mA versus 100mA), switching frequency (30kHz versus 100kHz), product status (Obsolete versus Active), operating temperature range (-25°C to 75°C versus -40°C to 85°C), and moisture sensitivity level (MSL 2 versus MSL 1). Both parts share identical package, topology, and output voltage specifications.

Q: Are there any PCB layout considerations when substituting the TC115501EMTTR for the NJU7261U50?

A: Both parts use the SOT-89-5/6 package, ensuring identical pinout and footprint compatibility. No PCB layout modifications are required. However, the TC115501EMTTR operates at 100kHz switching frequency compared to the NJU7261U50's 30kHz, which may affect EMI characteristics and filter component selection. Review the respective datasheets for frequency-dependent design parameters.

Q: Does the TC115501EMTTR support the same input voltage range as the NJU7261U50?

A: The TC115501EMTTR accepts input voltages from 0.9V to 10V, while the NJU7261U50 accepts 1V to 5V. The TC115501EMTTR provides a wider input voltage range, offering greater design flexibility. Both parts deliver fixed 5V output.

Q: What is the significance of the MSL rating difference?

A: The NJU7261U50 has MSL 2 (1-year shelf life), while the TC115501EMTTR has MSL 1 (unlimited shelf life). MSL 1 indicates superior moisture resistance and longer storage capability without special handling requirements. This provides logistical and inventory management advantages.

Q: Is the TC115501EMTTR available in the same packaging format as the NJU7261U50?

A: Both parts use SOT-89-5/6 surface mount packages. The NJU7261U50 is supplied in bulk packaging, while the TC115501EMTTR is supplied in Tape & Reel (TR) format. The component itself is identical; only the packaging format differs, which is a supply chain consideration rather than a technical compatibility issue.