All Alternatives

Alternatives to Texas Instruments LP3966ES-3.3

Texas Instruments LP3966ES-3.3 and its qualified second sources, compared on form, fit and function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

Equivalent and substitute parts for Texas Instruments LP3966ES-3.3

LP3966ES-3.3 compared against its qualified second sources
LP3966ES-3.3Texas InstrumentsLP3876ES-3.3/NOPBTexas InstrumentsLP3966ES-3.3/NOPBTexas Instruments+1more
FFF CompatibilityDirectly pin-compatible with the same 5-lead TO-263 (DDPAK) package setup.Same dimensions and land pattern requirements.Maintains matching output current (3A), fixed output voltage (3.3V), and input voltage limits (7V).Pin-compatible drop-in replacement with the exact same 5-lead TO-263 (DDPAK-5) pinout assignment.Same physical TO-263 package style, mounting requirements, and footprint dimensions.Identical electrical parameters (3A output, 3.3V fixed voltage, 1.2V dropout max, and 7V maximum input).
AI Summary

LP3966ES-3.3 by Texas Instruments: Linear Voltage Regulator IC Positive Fixed 1 Output 3A TO-263 (DDPAK-5).

This is an active, highly compatible alternative offering a balance between drop-in compatibility and reduced power consumption. It shares the same dropout specification as the target part but reduces the quiescent operating current. It is currently active and widely available.

  • Lower quiescent current of 5mA (vs 9mA on the target)
  • Same 1.2V dropout voltage specification
  • Identical pin-to-pin layout (drop-in compatible)

This is the official RoHS-compliant (Pb-Free) direct replacement for the obsolete LP3966ES-3.3. It is currently in active production, maintaining identical electrical specifications, pin assignments, and physical footprint. This represents the safest and highest-confidence drop-in alternative.

  • Direct active replacement of the obsolete target part
  • Identical pin-to-pin layout (drop-in)
  • Identical electrical characteristics and performance specifications
Lifecycle StatusObsoleteActiveActive
Market AvailabilityDiscontinuedIn stockIn stock
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Related parts

PartMarket availabilityLifecycleAlternatives available
LP3966ESX-ADJTexas InstrumentsIn stockObsolete5Alternatives availableSee Alternatives
LP3961ES-1.8Texas InstrumentsDiscontinuedObsolete1Alternatives availableSee Alternatives
LT1963ES8-3.3Analog DevicesDiscontinuedObsolete6Alternatives availableSee Alternatives
LPS33HWSTMicroelectronicsNon-stockActive5Alternatives availableSee Alternatives
LP3965ES-5.0 NOPBTexas InstrumentsNon-stockObsolete2Alternatives availableSee Alternatives
LM393GOODWORKIn stockActive5Alternatives availableSee Alternatives

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