MAX635ACSA Equivalent & Substitute Parts

Part Overview

The MAX635ACSA is a buck switching regulator IC from Analog Devices Inc./Maxim Integrated designed for negative voltage regulation. It delivers a fixed output of -1.31V (-5V) at 500mA with an input voltage range of 2.3V to 16.5V. The device operates at a switching frequency of 50kHz and is housed in an 8-SOIC surface mount package.

The MAX635ACSA is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications requiring this negative buck regulator topology.

Substiute Parts

MAX635ACSA

Analog Devices Inc./Maxim IntegratedIn Stock: 4450MAX635ACSA Datasheet

Current PartRFQ

MAX635ACSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1367MAX635ACSA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MAX635ACSA is determined by strict equivalence across the following critical parameters:

• Output voltage configuration (negative polarity)
• Buck topology with step-down/inverted function
• Fixed output voltage of -1.31V (-5V)
• Output current capability of 500mA
• Input voltage range of 2.3V to 16.5V
• Switching frequency of 50kHz
• 8-SOIC surface mount package
• Operating temperature range of 0°C to 70°C
• RoHS3 compliance and MSL Level 1 rating

The MAX635ACSA+ is identified as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The MAX635ACSA+ is the direct substitute for the MAX635ACSA. Both devices are ROHS3 compliant and carry MSL Level 1 rating, ensuring equivalent environmental and regulatory compliance.

The MAX635ACSA+ holds active product status, providing assured long-term availability and supply chain continuity. The MAX635ACSA is obsolete and should be replaced with the MAX635ACSA+ for new designs and ongoing production requirements.

Both parts are functionally and electrically identical, with identical package specifications. Selection between them is determined solely by product status and availability requirements.

Frequently Asked Questions (FAQ)

Q: Can the MAX635ACSA+ be used as a direct replacement for the MAX635ACSA?

A: Yes. The MAX635ACSA+ is electrically and mechanically identical to the MAX635ACSA. Both devices deliver -1.31V (-5V) output at 500mA with identical input voltage ranges, switching frequency, and package configuration. The primary difference is product status; the MAX635ACSA+ is active while the MAX635ACSA is obsolete.

Q: Are there any package or pinout differences between these parts?

A: No. Both the MAX635ACSA and MAX635ACSA+ use the 8-SOIC (0.154", 3.90mm Width) surface mount package with identical pinout and mechanical dimensions. PCB layouts and footprints are fully compatible.

Q: What is the significance of the "+" suffix in the MAX635ACSA+ part number?

A: The "+" suffix indicates the packaging format. The MAX635ACSA+ is supplied in tube packaging, while the base MAX635ACSA may use alternative packaging. Both parts are functionally equivalent.

Q: Are both parts RoHS compliant?

A: Yes. Both the MAX635ACSA and MAX635ACSA+ are ROHS3 compliant with MSL Level 1 rating, meeting current environmental and regulatory requirements.

Q: Why is the MAX635ACSA classified as obsolete?

A: The MAX635ACSA has reached end-of-life status. The MAX635ACSA+ remains in active production and should be used for all new designs and ongoing applications requiring this negative buck regulator topology.