LM2771SD Equivalent & Substitute Parts

Part Overview

The LM2771SD is a charge pump switching regulator IC from Texas Instruments designed for positive fixed 1.5V output applications. It delivers 250mA output current with an input voltage range of 2.7V to 5.5V, operating at a switching frequency of 1.1MHz. The device is housed in a 10-WFDFN exposed pad surface mount package.

The LM2771SD is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications currently using this component.

Substiute Parts

LM2771SD

Texas InstrumentsIn Stock: 2204LM2771SD Datasheet

Current PartRFQ

LM2771SD/NOPB

Texas InstrumentsIn Stock: 4314LM2771SD/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2771SD is determined by the following critical parameters:

• Identical output voltage (1.5V fixed)
• Identical output current capability (250mA minimum)
• Identical input voltage range (2.7V to 5.5V)
• Identical topology (charge pump switching regulator)
• Identical package type (10-WFDFN exposed pad)
• Identical mounting type (surface mount)
• Compatible operating temperature range (-30°C to 85°C)
• Identical switching frequency (1.1MHz)

The LM2771SD/NOPB qualifies as a direct substitute based on these parameters. The primary distinction is product status and compliance certification, not electrical or mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The LM2771SD/NOPB is the direct substitute for the LM2771SD. Both parts share identical electrical specifications and mechanical packaging. The LM2771SD/NOPB offers the following advantages:

• Active product status ensures ongoing manufacturer support and availability
• ROHS3 compliance meets current environmental and regulatory requirements
• Tape & Reel packaging format supports automated assembly processes
• Identical electrical performance and pin compatibility enable direct board-level substitution

Selection of the LM2771SD/NOPB is appropriate for new designs and production continuity where the LM2771SD is no longer available.

Frequently Asked Questions (FAQ)

Q: Can the LM2771SD/NOPB be used as a direct replacement for the LM2771SD?

A: Yes. Both parts are electrically and mechanically identical. The LM2771SD/NOPB has the same output voltage (1.5V), output current (250mA), input voltage range (2.7V to 5.5V), switching frequency (1.1MHz), and package type (10-WFDFN exposed pad). Pin-for-pin compatibility is confirmed.

Q: What is the difference between LM2771SD and LM2771SD/NOPB?

A: The primary differences are product status, compliance certification, and packaging format. The LM2771SD is obsolete and RoHS non-compliant, while the LM2771SD/NOPB is active and ROHS3 compliant. The LM2771SD/NOPB is supplied in Tape & Reel format, whereas the LM2771SD is supplied in bulk.

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

A: No. Both parts use the 10-WFDFN exposed pad package with identical 10-WSON (3x3) dimensions. PCB footprints and assembly processes are identical.

Q: Why is the LM2771SD marked as obsolete?

A: The LM2771SD has been superseded by the LM2771SD/NOPB, which offers improved compliance and active manufacturer support. Texas Instruments recommends transitioning to the LM2771SD/NOPB for new and ongoing production.

Q: Is the LM2771SD/NOPB suitable for high-volume production?

A: Yes. The LM2771SD/NOPB is available in Tape & Reel packaging, which is standard for automated assembly processes. Current inventory levels support production requirements.