PAM3115ABA250 Equivalent & Substitute Parts

Part Overview

The PAM3115ABA250 is a linear voltage regulator IC from Diodes Incorporated, designed to deliver a fixed 2.5V output at 1.5A in a compact SOT-223-3 surface mount package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The regulator incorporates over-current, over-temperature, and short-circuit protection with an enable control feature, suitable for applications requiring stable low-voltage power delivery with integrated safety mechanisms.

Substiute Parts

PAM3115ABA250

Diodes IncorporatedIn Stock: 775PAM3115ABA250 Datasheet

Current PartRFQ

LT1963AEST-2.5#TRPBF

Analog Devices Inc.In Stock: 28001LT1963AEST-2.5#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PAM3115ABA250 is determined by the following critical parameters:

• Fixed output voltage of 2.5V
• Output current capability of 1.5A minimum
• SOT-223-3 package compatibility for direct pin-compatible replacement
• Positive output configuration
• Enable control functionality
• Protection against over-current, over-temperature, and short-circuit conditions
• RoHS3 compliance for regulatory alignment

The LT1963AEST-2.5#TRPBF qualifies as a direct substitute based on matching these core electrical and mechanical specifications. While the substitute exhibits different absolute maximum input voltage (20V vs. 3.6V) and operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C), these represent enhanced capabilities that maintain full backward compatibility with the original design requirements.

Parameter Comparison

Engineering Selection Recommendations

The LT1963AEST-2.5#TRPBF is the qualified substitute for the obsolete PAM3115ABA250. Selection is justified on the following basis:

• Both devices maintain identical fixed output voltage (2.5V) and output current rating (1.5A)
• Pin-compatible SOT-223-3 packaging enables direct board-level replacement without layout modification
• The substitute is in active production status with established supply chain availability (27,959 pcs in stock vs. 698 pcs for the original)
• Both devices carry ROHS3 compliance certification, satisfying regulatory requirements
• The substitute's enhanced input voltage rating (20V) and extended operating temperature range (-40°C ~ 125°C) provide design margin without compromising original specifications
• Reverse polarity protection in the substitute offers additional circuit protection compared to the original device

Frequently Asked Questions (FAQ)

Q: Can the LT1963AEST-2.5#TRPBF be used as a direct replacement for the PAM3115ABA250?

A: Yes. Both devices are pin-compatible in SOT-223-3 packaging and deliver identical 2.5V fixed output at 1.5A. No circuit modifications are required for substitution.

Q: What are the key differences between these two regulators?

A: The primary differences are manufacturer (Diodes vs. Analog Devices), product status (obsolete vs. active), and absolute maximum ratings. The substitute accepts higher input voltage (20V vs. 3.6V) and operates across a wider temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). The substitute also includes reverse polarity protection.

Q: Does the higher dropout voltage of the substitute (0.55V vs. 0.3V) affect circuit performance?

A: The increased dropout voltage must be evaluated against your specific input voltage and load current conditions. If your design operates with input voltages significantly above the 2.5V output requirement, the additional 0.25V dropout is typically acceptable. Verify that your power supply can accommodate this margin.

Q: Are there any compliance or certification concerns with substitution?

A: Both devices are ROHS3 compliant and carry REACH Unaffected status. No compliance barriers exist for substitution in regulated applications.

Q: What is the packaging format difference between the original and substitute?

A: The original is supplied as loose components (standard packaging), while the substitute is supplied in Tape & Reel format. Both use identical SOT-223-3 package geometry. Tape & Reel format is standard for high-volume production and does not affect electrical performance.