PAM2301CAAB330 Equivalent & Substitute Parts

Part Overview

The PAM2301CAAB330 is a buck switching regulator IC from Diodes Incorporated designed for step-down voltage conversion with a fixed 3.3V output and 800mA current capacity. This component operates across a 2.5V to 5.5V input range with a switching frequency of 1.5MHz and includes synchronous rectification. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

PAM2301CAAB330

Diodes IncorporatedIn Stock: 35345PAM2301CAAB330 Datasheet

Current PartRFQ

TPS62291DRVT

Texas InstrumentsIn Stock: 3148TPS62291DRVT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PAM2301CAAB330 is determined by the following critical parameters:

• Output Voltage: Fixed 3.3V output is mandatory for direct substitution
• Topology: Buck (step-down) switching regulator topology required
• Output Configuration: Positive output configuration
• Synchronous Rectification: Must include synchronous rectifier for efficiency equivalence
• Operating Temperature Range: Must support -40°C to 85°C minimum
• Compliance Standards: RoHS3 compliance and REACH unaffected status required

The TPS62291DRVT from Texas Instruments meets all substitution criteria. While it provides higher output current capability (1A versus 800mA) and operates at a higher switching frequency (2.25MHz versus 1.5MHz), these represent performance enhancements rather than incompatibilities. The input voltage range (2.3V to 6V) encompasses the PAM2301CAAB330 specification (2.5V to 5.5V), ensuring compatibility in existing applications.

Parameter Comparison

Engineering Selection Recommendations

The TPS62291DRVT is the designated manufacturer-recommended substitute for the PAM2301CAAB330. Selection of this alternative is supported by:

• Product Status: The TPS62291DRVT maintains active product status, ensuring long-term availability and supply chain stability compared to the obsolete PAM2301CAAB330
• Compliance Alignment: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements
• Functional Equivalence: Identical output voltage (3.3V), topology (buck), and output configuration (positive) with synchronous rectification present in both designs
• Performance Enhancement: The TPS62291DRVT provides increased output current capacity (1A versus 800mA) and wider input voltage tolerance (2.3V to 6V versus 2.5V to 5.5V), making it suitable for applications currently using the PAM2301CAAB330
• Package Consideration: The shift from SOT-23-5 to 6-WDFN packaging requires PCB layout modification but provides improved thermal performance through the exposed pad design

Frequently Asked Questions (FAQ)

Q: Can the TPS62291DRVT directly replace the PAM2301CAAB330 without circuit modifications?

A: The TPS62291DRVT provides functional equivalence in output voltage, topology, and control characteristics. However, the package change from SOT-23-5 to 6-WDFN requires PCB footprint redesign. Circuit topology remains compatible, but layout and thermal management considerations must be re-evaluated.

Q: Why does the TPS62291DRVT have higher output current (1A) than the PAM2301CAAB330 (800mA)?

A: The TPS62291DRVT represents an enhanced design with greater current delivery capability. Applications limited to 800mA operation will function within the TPS62291DRVT specifications without modification. The higher rating provides design margin and future scalability.

Q: Are there input voltage compatibility concerns when substituting?

A: The TPS62291DRVT input range (2.3V to 6V) fully encompasses the PAM2301CAAB330 specification (2.5V to 5.5V). The extended lower limit (2.3V versus 2.5V) and upper limit (6V versus 5.5V) provide broader operational compatibility.

Q: What are the thermal implications of the package change?

A: The 6-WDFN package with exposed pad provides superior thermal dissipation compared to SOT-23-5. This enhancement reduces junction temperature under equivalent load conditions, improving reliability and efficiency.

Q: Do switching frequency differences affect circuit design?

A: The TPS62291DRVT operates at 2.25MHz versus the PAM2301CAAB330 at 1.5MHz. Higher switching frequency typically reduces output filter component size but may require PCB layout optimization to manage electromagnetic emissions. Input and output filter designs should be re-evaluated for the substitute component.

Q: Are compliance certifications equivalent between the two parts?

A: Both components maintain ROHS3 compliance and REACH unaffected status. Regulatory requirements are satisfied by either component selection.