MAX603CSA Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The MAX603CSA 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-SOIC surface mount package. The MAX603CSA is currently listed as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity.

Substiute Parts

MAX603CSA

Analog Devices Inc./Maxim IntegratedIn Stock: 1193MAX603CSA Datasheet

Current PartRFQ

MAX603CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 3403MAX603CSA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX603CSA is determined by strict equivalence across the following critical parameters:

• Output configuration (positive output)
• Output type (adjustable/fixed capability)
• Single regulator topology
• Input voltage range (maximum 11.5V)
• Output voltage range (1.25V to 11V)
• Dropout voltage specification (0.55V @ 500mA)
• Output current capacity (500mA)
• Quiescent current (35 µA)
• Control features (Enable function)
• Protection mechanisms (Over Current, Over Temperature, Reverse Polarity)
• Operating temperature range (0°C ~ 70°C)
• Package form factor (8-SOIC)

The MAX603CSA+ meets all these criteria and qualifies as a direct substitute based on identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The MAX603CSA+ is a direct functional equivalent to the MAX603CSA with identical electrical performance and package specifications. The primary distinction is product status: the MAX603CSA is obsolete while the MAX603CSA+ is active and currently in production.

For new designs or production continuity, the MAX603CSA+ is the appropriate selection. This substitute maintains full compatibility with existing circuit designs while offering the advantage of active manufacturer support and ongoing availability.

An additional consideration is regulatory compliance: the MAX603CSA+ carries ROHS3 compliance certification, whereas the original MAX603CSA is RoHS non-compliant. This distinction may be relevant for applications subject to environmental or procurement regulations requiring RoHS compliance.

Frequently Asked Questions (FAQ)

Q: Can the MAX603CSA+ be used as a direct replacement for the MAX603CSA in existing designs?

A: Yes. The MAX603CSA+ is electrically and mechanically identical to the MAX603CSA. All electrical parameters, output specifications, protection features, and package dimensions are equivalent. No circuit modifications are required.

Q: What is the primary reason to substitute the MAX603CSA?

A: The MAX603CSA is classified as obsolete. The MAX603CSA+ is the active production equivalent from the same manufacturer, ensuring continued availability and manufacturer support.

Q: Are there any differences in packaging between these parts?

A: Both parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package. The MAX603CSA+ is supplied in Tube packaging, while the original part number does not specify packaging format. This does not affect electrical compatibility or PCB assembly compatibility.

Q: Does the RoHS compliance difference affect substitution?

A: The MAX603CSA+ is ROHS3 compliant while the MAX603CSA is RoHS non-compliant. For applications or procurement environments requiring RoHS compliance, the MAX603CSA+ is the appropriate choice. For applications without RoHS requirements, both parts are functionally equivalent.

Q: Are the quiescent current and dropout voltage specifications identical?

A: Yes. Both parts specify 35 µA quiescent current and 0.55V maximum dropout voltage at 500mA output current. Thermal and power dissipation characteristics are equivalent.

Q: What is the output current capacity of these regulators?

A: Both the MAX603CSA and MAX603CSA+ deliver a maximum output current of 500mA. The adjustable output voltage range is 1.25V to 11V, with a fixed 5V option available.