PAM3115ABA300 Equivalent & Substitute Parts

Part Overview

The PAM3115ABA300 is a linear voltage regulator IC from Diodes Incorporated designed for positive fixed 3V output at 1.5A in a SOT-223-3 surface mount package. This device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing production support and design continuity. The part provides regulated 3V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for low-power applications requiring stable voltage regulation.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3V
Output Current	1.5A
Input Voltage (Max)	3.6V
Voltage Dropout (Max)	0.3V @ 1.5A
Quiescent Current	150 µA
Package	SOT-223-3
Operating Temperature Range	-40°C ~ 85°C
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the PAM3115ABA300 is determined by the following critical parameters:

Output Voltage: Fixed 3V output is mandatory
Output Current Capability: Minimum 1.5A required
Package Type: SOT-223-3 surface mount package
Protection Features: Over-current and over-temperature protection required
Operating Temperature Range: -40°C to 85°C minimum
Regulatory Compliance: ROHS3 compliance required

The ADP3339AKCZ-3-RL7 from Analog Devices Inc. meets all substitution criteria. While this part is classified as "Not For New Designs," it maintains functional equivalence across all critical electrical and mechanical parameters required for direct replacement in existing applications.

Parameter Comparison

Parameter	PAM3115ABA300	ADP3339AKCZ-3-RL7	Compatibility
Manufacturer	Diodes Incorporated	Analog Devices Inc.	Different manufacturer
Output Voltage (Fixed)	3V	3V	Match
Output Current	1.5A	1.5A	Match
Input Voltage (Max)	3.6V	6V	Substitute has higher rating
Voltage Dropout (Max)	0.3V @ 1.5A	0.48V @ 1.5A	Substitute has higher dropout
Quiescent Current	150 µA	200 µA	Substitute draws more quiescent current
Package	SOT-223-3	SOT-223-3	Match
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Match
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature	Substitute lacks short-circuit protection
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Product Status	Obsolete	Not For New Designs	Both have limited availability status

Engineering Selection Recommendations

The ADP3339AKCZ-3-RL7 is the manufacturer-recommended substitute for the PAM3115ABA300. Both devices are ROHS3 compliant and maintain identical output voltage and current specifications. The substitute accommodates higher input voltage (6V vs 3.6V maximum) and operates across the same temperature range.

Design considerations for substitution:

The ADP3339AKCZ-3-RL7 exhibits higher voltage dropout (0.48V vs 0.3V), which may impact efficiency in applications with tight input voltage margins
Quiescent current is slightly elevated (200 µA vs 150 µA), affecting standby power consumption
Short-circuit protection is present in the original part but absent in the substitute; circuit-level protection may be required if this feature is critical to system design
Both parts are classified with limited product status (Obsolete vs Not For New Designs), indicating reduced long-term availability

Frequently Asked Questions (FAQ)

Q: Can the ADP3339AKCZ-3-RL7 directly replace the PAM3115ABA300 in existing designs?

A: Yes, for applications where the higher voltage dropout and absence of integrated short-circuit protection do not create system-level constraints. Both devices provide identical 3V/1.5A output in the same SOT-223-3 package with matching operating temperature ranges.

Q: What is the impact of the higher dropout voltage in the substitute part?

A: The ADP3339AKCZ-3-RL7 exhibits 0.48V dropout compared to 0.3V in the original. This increases the minimum input voltage requirement and reduces efficiency in low-input-voltage applications. Verify that your input voltage margin accommodates this difference.

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

A: The PAM3115ABA300 includes over-current, over-temperature, and short-circuit protection. The ADP3339AKCZ-3-RL7 provides over-current and over-temperature protection only. If short-circuit protection is essential to your application, external circuit protection may be necessary.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes, both the PAM3115ABA300 and ADP3339AKCZ-3-RL7 are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory requirements for industrial and commercial applications.

Q: What is the difference in quiescent current consumption?

A: The substitute draws 200 µA quiescent current versus 150 µA in the original part. This 50 µA difference is negligible in most applications but may be significant in ultra-low-power standby scenarios.

Q: Are both parts available in the same package configuration?

A: Yes, both devices are supplied in SOT-223-3 surface mount packages with identical pinout and mechanical dimensions, enabling direct PCB-level substitution without layout modifications.

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