CMPWR101R Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The CMPWR101R is a linear voltage regulator IC manufactured by onsemi, designed for positive fixed 3.3V output applications with 250mA current capacity in an 8-SOIC surface mount package. This device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The regulator integrates over-current and short-circuit protection features suitable for general-purpose power management applications.

Substiute Parts

CMPWR101R

onsemiIn Stock: 1909CMPWR101R Datasheet

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TPPM0301DR

Texas InstrumentsIn Stock: 10344TPPM0301DR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMPWR101R is determined by the following critical parameters:

• Output Voltage: Fixed 3.3V output is the primary functional requirement
• Package Type: 8-SOIC surface mount package ensures PCB compatibility
• Input Voltage Range: Maximum 5.5V input compatibility
• Output Current Capacity: Minimum 250mA required for circuit operation
• Protection Features: Over-current and thermal protection for circuit safety
• Operating Temperature Range: 0°C ~ 70°C industrial standard range
• Mounting Configuration: Surface mount technology for automated assembly

The TPPM0301DR from Texas Instruments meets all critical substitution criteria. While it provides higher output current capacity (400mA versus 250mA), this represents an enhancement rather than a limitation, as the substitute can deliver the required 250mA within its specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The TPPM0301DR is a direct functional substitute for the obsolete CMPWR101R based on the following engineering criteria:

Electrical Compatibility: Both devices operate with identical fixed 3.3V output voltage, 5.5V maximum input voltage, and 0°C to 70°C operating temperature range. The TPPM0301DR's 400mA output current rating exceeds the CMPWR101R's 250mA requirement, ensuring adequate headroom for circuit operation.

Package Compatibility: Both regulators use the 8-SOIC surface mount package with identical 0.154" (3.90mm) width, enabling direct PCB footprint compatibility without layout modifications.

Product Status: The TPPM0301DR maintains active manufacturing status with established supply chain availability (10,300 pieces in stock), whereas the CMPWR101R is obsolete. This transition eliminates long-term procurement risk.

Compliance: Both devices maintain REACH Unaffected status, ensuring regulatory compliance for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the TPPM0301DR directly replace the CMPWR101R on existing PCBs?

A: Yes. Both devices use identical 8-SOIC packaging with matching pinout compatibility for linear voltage regulator ICs. No PCB modifications are required for physical installation.

Q: Does the higher output current rating (400mA vs 250mA) affect circuit operation?

A: No. The TPPM0301DR's higher current capacity is a performance enhancement. Circuits designed for 250mA operation will function within the substitute's specifications without modification.

Q: What are the differences in protection features between these devices?

A: The CMPWR101R provides over-current and short-circuit protection. The TPPM0301DR provides over-temperature and reverse-polarity protection. Both protection schemes are suitable for power management applications; the specific protection type depends on circuit topology and application requirements.

Q: Is the TPPM0301DR available for immediate procurement?

A: Yes. The TPPM0301DR is actively manufactured by Texas Instruments with 10,300 pieces currently in stock, providing reliable supply chain availability compared to the obsolete CMPWR101R.

Q: Are there any thermal or quiescent current differences to consider?

A: The CMPWR101R specifies 400 µA quiescent current. The TPPM0301DR's quiescent current specification is not provided in the available data. For applications with strict standby power requirements, obtain the TPPM0301DR datasheet for detailed quiescent current specifications.

Q: Do both devices support the same input voltage range?

A: Yes. Both regulators specify 5.5V maximum input voltage, ensuring compatibility with standard 5V supply rails and similar power source configurations.