MAX730AESA Buck Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The MAX730AESA is a buck switching regulator IC manufactured by Analog Devices Inc./Maxim Integrated, designed for step-down voltage conversion applications. This device delivers a fixed 5V output at 450mA from input voltages ranging from 5.2V to 11V, operating at a switching frequency of 170kHz. The part is classified as obsolete, making identification of suitable alternatives essential for ongoing system support and new design implementations. The MAX730AESA is packaged in an 8-SOIC (0.154", 3.90mm Width) surface mount configuration and operates across the industrial temperature range of -40°C to 85°C.

Substiute Parts

MAX730AESA

Analog Devices Inc./Maxim IntegratedIn Stock: 888MAX730AESA Datasheet

Current PartRFQ

MAX730AESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 849MAX730AESA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX730AESA is determined by strict equivalence across the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator topology
• Output Voltage: Fixed 5V output
• Output Current: 450mA rated output current
• Input Voltage Range: 5.2V to 11V input acceptance
• Switching Frequency: 170kHz operation
• Package Type: 8-SOIC (0.154", 3.90mm Width) surface mount
• Temperature Range: -40°C to 85°C operating specification
• Output Configuration: Single positive output

The MAX730AESA+ qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction between these parts is product status and compliance certification, not functional or electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

The MAX730AESA+ is the direct functional equivalent of the MAX730AESA. Both devices share identical electrical specifications, switching characteristics, and package configuration. The MAX730AESA+ is preferred for new designs and ongoing production due to its active product status and ROHS3 compliance certification. The MAX730AESA, classified as obsolete, presents supply chain risk and does not meet current RoHS3 regulatory requirements.

For applications requiring the MAX730AESA, transition to the MAX730AESA+ is recommended without circuit modification, as all electrical and mechanical parameters remain unchanged. The tube packaging of the MAX730AESA+ provides standard handling and storage compatibility with automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the MAX730AESA+ be used as a direct replacement for the MAX730AESA?

A: Yes. The MAX730AESA+ is electrically and mechanically identical to the MAX730AESA. All output voltage, current, input voltage range, switching frequency, temperature range, and package specifications are equivalent. No circuit redesign is required.

Q: What is the primary difference between these two parts?

A: The MAX730AESA is obsolete with RoHS non-compliant status, while the MAX730AESA+ is active and ROHS3 compliant. Electrical and functional specifications are identical.

Q: Are there any package compatibility concerns?

A: No. Both parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package. The MAX730AESA+ is supplied in tube packaging, which is standard for automated assembly operations.

Q: What input voltage range does this regulator support?

A: The input voltage range is 5.2V minimum to 11V maximum for both the MAX730AESA and MAX730AESA+.

Q: What is the output current rating?

A: Both parts are rated for 450mA maximum output current at the fixed 5V output.

Q: Is this a synchronous rectifier design?

A: No. Both the MAX730AESA and MAX730AESA+ use non-synchronous rectification topology.

Q: What is the switching frequency?

A: Both devices operate at a fixed switching frequency of 170kHz.

Q: What temperature range is supported?

A: Both parts operate across the industrial temperature range of -40°C to 85°C (TA).