MAX603EPA+ Equivalent & Substitute Parts

Part Overview

The MAX603EPA+ is a linear voltage regulator IC from Analog Devices Inc./Maxim Integrated designed for positive adjustable (fixed) output applications. This through-hole 8-DIP package device delivers 500mA output current with a dropout voltage of 0.55V at maximum load. The part is actively produced and widely used in power management applications requiring adjustable or fixed voltage regulation with integrated protection features. Finding equivalent or substitute parts may be necessary due to supply constraints, design revisions, or inventory management requirements.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc./Maxim Integrated
Part Number	MAX603EPA+
Category	Power Management (PMIC)
Package Type	8-DIP (0.300", 7.62mm)
Output Configuration	Positive
Output Type	Adjustable (Fixed)
Output Current	500mA
Input Voltage (Max)	11.5V
Output Voltage (Min/Fixed)	1.25V (5V)
Output Voltage (Max)	11V
Dropout Voltage (Max)	0.55V @ 500mA
Quiescent Current	35 µA
Control Features	Enable
Protection Features	Over Current, Over Temperature, Reverse Polarity
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Through Hole
Product Status	Active
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MAX603EPA+ is determined by strict equivalence across the following critical parameters:

Package Type: 8-DIP (0.300", 7.62mm) through-hole configuration
Output Current Rating: 500mA minimum
Output Configuration: Positive adjustable (fixed) output
Input Voltage Range: Maximum 11.5V or greater
Output Voltage Range: Minimum 1.25V to maximum 11V capability
Dropout Voltage: 0.55V @ 500mA or lower
Control Features: Enable function required
Protection Features: Over current, over temperature, and reverse polarity protection
Operating Temperature: -40°C to 85°C minimum range
Compliance: ROHS3 compliant, MSL 1 rating

Only parts meeting all these parameters qualify as direct substitutes. The MAX603EPA+ itself represents the primary equivalent part in this category.

Parameter Comparison

Parameter	MAX603EPA+ (Main Part)	MAX603EPA+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Package	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Output Current	500mA	500mA
Input Voltage (Max)	11.5V	11.5V
Output Voltage Range	1.25V - 11V	1.25V - 11V
Dropout Voltage	0.55V @ 500mA	0.55V @ 500mA
Quiescent Current	35 µA	35 µA
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The MAX603EPA+ is an active product with full ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), making it suitable for standard manufacturing and storage conditions without special handling requirements. The part carries REACH unaffected status and EAR99 export classification, indicating standard commercial availability.

Selection of this linear voltage regulator should be based on the specific output voltage requirement (adjustable or fixed 5V configuration), the 500mA current capacity matching the application load, and the 0.55V dropout voltage performance at maximum current. The integrated enable control and comprehensive protection features (over current, over temperature, reverse polarity) provide robust circuit protection in power management applications.

The through-hole 8-DIP package format is suitable for breadboard prototyping, evaluation boards, and legacy PCB designs. The -40°C to 85°C operating temperature range covers industrial and commercial temperature specifications.

Frequently Asked Questions (FAQ)

Q: What makes MAX603EPA+ a direct substitute for itself? A: The MAX603EPA+ meets all electrical and mechanical parameters required for linear voltage regulation at 500mA output current with adjustable or fixed positive output configuration. Identical package type, voltage ratings, dropout performance, and protection features ensure pin-for-pin and functional compatibility.

Q: Can the MAX603EPA+ be used in both adjustable and fixed output configurations? A: Yes. The MAX603EPA+ supports both adjustable output (1.25V to 11V) and fixed output (5V) configurations depending on external resistor network design. The output type specification "Adjustable (Fixed)" indicates this dual capability.

Q: What are the package considerations for the MAX603EPA+? A: The 8-DIP (0.300", 7.62mm) through-hole package requires standard DIP socket compatibility or direct PCB mounting with 0.3-inch row spacing. This package format is not compatible with surface-mount applications or alternative DIP pitch specifications.

Q: Does the MAX603EPA+ require special handling or storage conditions? A: No. The MSL 1 (Unlimited) moisture sensitivity level indicates the part does not require special moisture control during storage or handling. Standard industrial storage conditions are acceptable.

Q: What protection features are included in the MAX603EPA+? A: The MAX603EPA+ includes three integrated protection mechanisms: over current protection to limit output current, over temperature protection to prevent thermal damage, and reverse polarity protection to guard against incorrect input voltage connection.

Q: Is the MAX603EPA+ suitable for new designs? A: Yes. The part maintains active product status with full ROHS3 compliance and standard commercial availability, making it appropriate for new design implementations requiring 500mA positive adjustable or fixed voltage regulation.

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