PAM3115ABA180 Equivalent & Substitute Parts

Part Overview

The PAM3115ABA180 is a linear voltage regulator IC from Diodes Incorporated, designed to deliver a fixed 1.8V output at 1.5A in a surface-mount SOT-223-3 package. This device functions as a positive fixed output regulator with integrated protection features including over-current, over-temperature, and short-circuit protection.

The PAM3115ABA180 has reached obsolete product status. Identifying qualified substitute components is necessary to maintain design continuity and ensure supply chain reliability for applications requiring this voltage regulation topology.

Substiute Parts

PAM3115ABA180

Diodes IncorporatedIn Stock: 25299PAM3115ABA180 Datasheet

Current PartRFQ

LT1963AEST-1.8#PBF

Analog Devices Inc.In Stock: 4891LT1963AEST-1.8#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PAM3115ABA180 is determined by the following critical parameters:

• Fixed output voltage of 1.8V
• Output current capability of 1.5A minimum
• Surface-mount SOT-223-3 package compatibility
• Enable control feature availability
• Protection against over-current, over-temperature, and short-circuit conditions
• RoHS3 compliance

The LT1963AEST-1.8#PBF qualifies as a direct substitute based on matching these core electrical and mechanical specifications. Both devices deliver identical output voltage and current ratings in the same package footprint with equivalent protection architectures.

Parameter Comparison

Engineering Selection Recommendations

The LT1963AEST-1.8#PBF is the qualified substitute for the obsolete PAM3115ABA180. Both devices are ROHS3 compliant and maintain identical output specifications (1.8V, 1.5A) in the same SOT-223-3 package.

Key considerations for substitution:

The LT1963AEST-1.8#PBF accepts a higher maximum input voltage (20V versus 3.6V), providing greater design flexibility for applications with variable supply rails. The substitute exhibits slightly higher dropout voltage (0.55V versus 0.35V) and elevated quiescent current (1.5 mA versus 150 µA), which may impact efficiency in battery-powered or low-power standby applications.

The LT1963AEST-1.8#PBF supports an extended operating temperature range (-40°C to 125°C versus -40°C to 85°C) and includes reverse-polarity protection in addition to the over-current and over-temperature protection present in the original device.

Active product status and established supply availability make the LT1963AEST-1.8#PBF suitable for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the LT1963AEST-1.8#PBF be used as a direct replacement for the PAM3115ABA180?

A: Yes. Both devices deliver 1.8V at 1.5A in SOT-223-3 packages with equivalent protection features and control functionality. Pin-to-pin compatibility and electrical performance are suitable for direct substitution in existing designs.

Q: What are the differences in input voltage handling?

A: The PAM3115ABA180 accepts input voltages up to 3.6V maximum, while the LT1963AEST-1.8#PBF accepts up to 20V. The substitute provides broader input voltage compatibility and is suitable for applications with higher supply rails.

Q: How do the dropout voltages compare?

A: The PAM3115ABA180 exhibits 0.35V dropout at 1.5A, while the LT1963AEST-1.8#PBF exhibits 0.55V dropout at the same current. Applications with tight input-to-output voltage margins should verify that the higher dropout voltage remains acceptable.

Q: What is the impact of higher quiescent current in the substitute?

A: The LT1963AEST-1.8#PBF draws 1.5 mA quiescent current compared to 150 µA in the original device. In applications requiring extended battery life or minimal standby power consumption, this tenfold increase may require circuit redesign or alternative component selection.

Q: Are both devices RoHS compliant?

A: Yes. Both the PAM3115ABA180 and LT1963AEST-1.8#PBF are ROHS3 compliant and suitable for applications with RoHS requirements.

Q: What additional protection does the substitute provide?

A: The LT1963AEST-1.8#PBF includes reverse-polarity protection in addition to over-current, over-temperature, and short-circuit protection. The original PAM3115ABA180 does not include reverse-polarity protection.