CMPWR330SF Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The CMPWR330SF is a linear voltage regulator IC manufactured by onsemi, designed to deliver a fixed 3.3V output at 400mA in an 8-SOIC surface mount package. This device is classified as a Power Management (PMIC) component and is currently listed as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity, production planning, and long-term component sourcing strategies.

Substiute Parts

CMPWR330SF

onsemiIn Stock: 2053CMPWR330SF Datasheet

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TPPM0301DR

Texas InstrumentsIn Stock: 10344TPPM0301DR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMPWR330SF is determined by strict alignment of the following critical parameters:

• Output Voltage: Fixed 3.3V output
• Output Current: 400mA minimum capability
• Package Type: 8-SOIC surface mount form factor
• Output Configuration: Positive fixed regulator
• Operating Temperature Range: 0°C ~ 70°C minimum
• Input Voltage Compatibility: Maximum input voltage of 5.25V or higher

The TPPM0301DR from Texas Instruments meets all substitution criteria. Both devices deliver identical output specifications (3.3V fixed, 400mA), share the same 8-SOIC package footprint, and operate within the same temperature range. The substitute part maintains functional and mechanical compatibility while offering active product status and enhanced availability.

Parameter Comparison

Engineering Selection Recommendations

The TPPM0301DR is a direct functional substitute for the CMPWR330SF. Both devices are classified as REACH Unaffected, ensuring compliance with regulatory requirements. The primary advantage of selecting the TPPM0301DR is its active product status, which guarantees long-term availability and supply chain stability compared to the obsolete CMPWR330SF.

The TPPM0301DR offers an extended maximum input voltage specification (5.5V versus 5.25V) and includes reverse polarity protection in addition to over-temperature protection. These enhancements provide additional design margin and system robustness without compromising pin compatibility or functional performance.

Both devices share identical 8-SOIC packaging, output voltage, and current specifications, enabling direct PCB layout compatibility and straightforward design migration.

Frequently Asked Questions (FAQ)

Q: Can the TPPM0301DR replace the CMPWR330SF in existing designs?

A: Yes. Both devices deliver 3.3V fixed output at 400mA in an 8-SOIC package with matching pin configurations. The electrical and mechanical specifications are compatible for direct substitution.

Q: What is the primary reason to substitute the CMPWR330SF?

A: The CMPWR330SF is obsolete. The TPPM0301DR is an active product with guaranteed availability, making it the appropriate choice for new designs and production continuity.

Q: Are there differences in protection features between these devices?

A: The CMPWR330SF provides over-current and over-temperature protection. The TPPM0301DR provides over-temperature and reverse-polarity protection. Both offer thermal management capabilities suitable for the 400mA output specification.

Q: Does the TPPM0301DR fit the same PCB footprint?

A: Yes. Both devices use the 8-SOIC (0.154", 3.90mm Width) package. PCB layouts designed for the CMPWR330SF require no modification to accommodate the TPPM0301DR.

Q: What is the operating temperature range for both devices?

A: Both the CMPWR330SF and TPPM0301DR operate across 0°C to 70°C, ensuring compatibility in equivalent thermal environments.

Q: Is the TPPM0301DR compliant with REACH regulations?

A: Yes. The TPPM0301DR is REACH Unaffected, matching the compliance status of the CMPWR330SF.