MAX603EPA Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The MAX603EPA is a linear voltage regulator IC from Analog Devices Inc./Maxim Integrated, classified as a Power Management (PMIC) component. This device functions as a positive adjustable (fixed) output regulator capable of delivering 500mA output current in an 8-DIP through-hole package. The MAX603EPA is currently listed as obsolete, making identification of compatible substitute parts essential for ongoing system support, maintenance, and new design implementations where legacy component compatibility is required.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable (Fixed)
Number of Regulators	1
Voltage - Input (Max)	11.5V
Voltage - Output (Min/Fixed)	1.25V (5V)
Voltage - Output (Max)	11V
Voltage Dropout (Max)	0.55V @ 500mA
Current - Output	500mA
Current - Quiescent (Iq)	35 µA
Control Features	Enable
Protection Features	Over Current, Over Temperature, Reverse Polarity
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Base Product Number	MAX603

Substitute Part Grouping Explanation

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

Output Configuration & Type: Positive adjustable (fixed) output with single regulator topology
Electrical Performance: 500mA output current, 0.55V maximum dropout at rated current, 35 µA quiescent current
Voltage Specifications: 11.5V maximum input, 1.25V to 11V output range capability
Protection & Control: Over current, over temperature, and reverse polarity protection with enable control feature
Package Compatibility: 8-DIP through-hole package (0.300", 7.62mm) for direct PCB mounting
Operating Environment: -40°C to 85°C temperature range

The MAX603EPA+ qualifies as a direct substitute based on identical electrical specifications, matching package configuration, and equivalent functional capabilities across all provided parameters.

Parameter Comparison

Parameter	MAX603EPA (Main Part)	MAX603EPA+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete	Active
Output Configuration	Positive	Positive
Output Type	Adjustable (Fixed)	Adjustable (Fixed)
Voltage - Input (Max)	11.5V	11.5V
Voltage - Output (Min/Fixed)	1.25V (5V)	1.25V (5V)
Voltage - Output (Max)	11V	11V
Voltage Dropout (Max)	0.55V @ 500mA	0.55V @ 500mA
Current - Output	500mA	500mA
Current - Quiescent (Iq)	35 µA	35 µA
Control Features	Enable	Enable
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The MAX603EPA+ serves as the direct functional equivalent to the obsolete MAX603EPA. Both components share identical electrical specifications, package configuration, and operational characteristics. The primary distinction is product status: the MAX603EPA is obsolete while the MAX603EPA+ is active in production.

For new designs or system replacements, the MAX603EPA+ is the appropriate selection. This substitute maintains full electrical and mechanical compatibility while offering the advantage of active product status and ROHS3 compliance, compared to the non-compliant RoHS status of the original MAX603EPA.

Both components are classified as REACH Unaffected and carry identical moisture sensitivity levels (MSL 1 - Unlimited), ensuring equivalent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX603EPA+ be used as a direct replacement for MAX603EPA in existing designs?

A: Yes. The MAX603EPA+ is electrically and mechanically identical to the MAX603EPA. Both devices feature the same 8-DIP package, identical voltage specifications (11.5V input maximum, 1.25V to 11V output range), 500mA output current capability, and equivalent protection features. Pin-for-pin compatibility is maintained.

Q: What is the primary reason to substitute MAX603EPA with MAX603EPA+?

A: The MAX603EPA is obsolete, making the active MAX603EPA+ the necessary choice for ongoing production, maintenance, and new system implementations. The substitute maintains full functional equivalence while ensuring component availability.

Q: Are there packaging differences between MAX603EPA and MAX603EPA+?

A: Both components use the 8-DIP (0.300", 7.62mm) through-hole package. The MAX603EPA+ is supplied in Tube packaging, while the original MAX603EPA packaging is not specified. This does not affect electrical performance or PCB mounting compatibility.

Q: What compliance differences exist between these parts?

A: The MAX603EPA+ is ROHS3 compliant, whereas the MAX603EPA is RoHS non-compliant. Both maintain REACH Unaffected status and identical MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Are the electrical performance characteristics identical?

A: Yes. Both the MAX603EPA and MAX603EPA+ deliver 500mA output current, maintain 0.55V maximum dropout voltage at rated current, operate across -40°C to 85°C, and provide identical protection features including over current, over temperature, and reverse polarity protection.

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