LP2951-33DRG4 Equivalent & Substitute Parts

Part Overview

The LP2951-33DRG4 is a linear voltage regulator IC from Texas Instruments designed for positive adjustable (fixed) output applications. This device delivers 100mA output current in an 8-SOIC surface mount package and is suitable for low-dropout regulation in power management circuits. The LP2951-33DRG4 is currently discontinued at DiGi Electronics, making identification of active equivalent parts essential for ongoing production and design requirements.

Substiute Parts

LP2951-33DRG4

Texas InstrumentsIn Stock: 5610LP2951-33DRG4 Datasheet

Current PartRFQ

LP2951-33DR

Texas InstrumentsIn Stock: 65495LP2951-33DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2951-33DRG4 is determined by strict equivalence across the following critical parameters:

• Output configuration (Positive)
• Output type (Adjustable/Fixed)
• Number of regulators (1)
• Voltage specifications (Input Max: 30V, Output Min/Fixed: 1.235V/3.3V, Output Max: 30V)
• Dropout voltage (0.6V @ 100mA)
• Output current (100mA)
• Quiescent current (120 µA)
• Protection features (Over Current, Over Temperature, Short Circuit)
• Operating temperature range (-40°C ~ 125°C)
• Package type (8-SOIC)
• Compliance certifications (ROHS3, REACH Unaffected)

The LP2951-33DR meets all these criteria and serves as a parametric equivalent. The primary distinction is packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The LP2951-33DR is the active equivalent for the discontinued LP2951-33DRG4. Both parts share identical electrical specifications, thermal performance, and regulatory compliance. The LP2951-33DR maintains ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

The LP2951-33DR is currently in active production with significantly higher inventory availability (65,400 pcs vs. 5,500 pcs for the original part). For new designs or production continuation, the LP2951-33DR is the appropriate selection. Both parts are housed in the same 8-SOIC package and require identical PCB footprints and circuit design considerations.

Frequently Asked Questions (FAQ)

Q: Can the LP2951-33DR directly replace the LP2951-33DRG4 in existing designs?

A: Yes. Both parts are parametrically identical across all electrical, thermal, and mechanical specifications. No circuit modifications are required. The 8-SOIC package footprint is identical, and pin configurations are equivalent.

Q: What is the difference between the LP2951-33DRG4 and LP2951-33DR?

A: The primary differences are product status and packaging format. The LP2951-33DRG4 is discontinued and supplied in Digi-Reel® format. The LP2951-33DR is active and available in both Cut Tape (CT) and Digi-Reel® packaging options.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts maintain identical ROHS3 compliance, REACH unaffected status, and MSL rating of 1 (Unlimited). Regulatory and environmental certifications are equivalent.

Q: What is the output current capability of these regulators?

A: Both the LP2951-33DRG4 and LP2951-33DR deliver a maximum output current of 100mA with a maximum dropout voltage of 0.6V at this current level.

Q: Are these parts suitable for adjustable or fixed output applications?

A: Both parts support adjustable and fixed output configurations. The designation "-33" indicates a fixed 3.3V output option, though the base LP2951 architecture allows for adjustable output through external resistor networks.