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Best Alternatives to LMR33630ADDAR

Package: 8-PowerSOIC (0.154", 3.90mm Width)Texas InstrumentsVoltage Regulators - DC DC Switching RegulatorsSeries: SIMPLE SWITCHER®Package: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - Input (Min): 3.8VVoltage - Input (Max): 36VVoltage - Output (Min/Fixed): 1V

LMR33630ADDAR is a versatile 36V, 3A step-down regulator. While no direct drop-in replacement exists, several functional alternatives within the same family offer different switching frequencies, requiring minor redesign for optimization.

AI replacement insight

Electrical riskhigh

Changing switching frequency requires redesign of external inductor and capacitors.

Package risklow

Alternatives exist in the same HSOIC-8 package, suggesting pin compatibility.

Sourcing risklow

Multiple variants from the same manufacturer are available.

Can it be replaced directly?

No direct drop-in replacement exists. The closest options are other LMR33630 versions which require redesign of the passive components.

Best replacement path

Use another LMR33630 variant like LMR33630BDDAR, but plan for external component changes due to the different switching frequency.

Main risk

Switching frequency mismatch, which impacts external component selection, efficiency, and EMI.

Recommended alternatives

3
LMR33630BDDAR package
LMR33630BDDAR

Texas Instruments

Needs validationmedium risk

Functionally similar with same current rating, but has a different switching frequency requiring design review.

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Alternative comparison matrix

Feature / factorLMR33630ADDARLMR33630BDDARLMR33630CDDARLMR14050SQDDARQ1Compatibility / risk
PackageHSOIC-8HSOIC-8HSOIC-8HSOIC (8)HSOIC-8 / HSOIC (8) — Package appears identical, likely pin-compatible.; LMR33630CDDAR: Package appears identical, likely pin-compatible.; LMR14050SQDDARQ1: Package appears identical, but pinout must be verified.; LMR33620ADDAR: Package and pinout are compatible.
Voltage3.8V to 36V3.8V to 36V3.8V to 36V4V to 40V3.8V to 36V / 4V to 40V — Input voltage range matches.; LMR33630CDDAR: Input voltage range matches.; LMR14050SQDDARQ1: Similar input voltage range, slightly higher min voltage.; LMR33620ADDAR: Input voltage range matches.
Current3A3A3A5A3A / 5A / 2A — Output current rating matches.; LMR33630CDDAR: Output current rating matches.; LMR14050SQDDARQ1: Higher output current provides more margin.; LMR33620ADDAR: Lower output current rating.
Switching Frequency400kHz1.4MHz2.1MHz-1.4MHz / 2.1MHz / 400kHz — Higher frequency requires recalculating external L/C values and may affect EMI.; LMR33630CDDAR: Higher frequency requires recalculating external L/C values and may affect EMI.; LMR33620ADDAR: Switching frequency matches.
ApplicationIndustrial--AutomotiveAutomotive — Q1 suffix indicates automotive grade.

Application & sourcing insights

Questions & answers

The best alternatives are other variants within the LMR33630 family, such as LMR33630BDDAR (1.4MHz) or LMR33630CDDAR (2.1MHz). These offer the same voltage and current ratings but require adjusting external components for the different switching frequency.