MAX1653EEE Buck Regulator Controller - Equivalent & Substitute Parts

Part Overview

The MAX1653EEE is a buck regulator positive output step-down DC-DC controller IC in 16-QSOP packaging, manufactured by Analog Devices Inc./Maxim Integrated. This component functions as a transistor driver for step-down topology applications with a single output phase. The MAX1653EEE is classified as obsolete product status, making identification of active equivalent parts essential for new designs and ongoing production requirements.

Substiute Parts

MAX1653EEE

Analog Devices Inc./Maxim IntegratedIn Stock: 2239MAX1653EEE Datasheet

Current PartRFQ

MAX1653EEE+

Analog Devices Inc./Maxim IntegratedIn Stock: 2244MAX1653EEE+ Datasheet

DirectRFQ

MAX1655EEE+

Analog Devices Inc./Maxim IntegratedIn Stock: 4452MAX1655EEE+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX1653EEE are identified based on strict electrical and mechanical parameter matching within the buck regulator controller category. The substitution logic is based on the following key parameters:

• Functional equivalence: Step-down buck topology with transistor driver output
• Electrical specifications: Voltage supply range (4.5V ~ 30V), switching frequency (150kHz, 300kHz), duty cycle (98% maximum)
• Control features: Enable and soft start functionality
• Synchronous rectification and clock sync capability: Both present
• Package compatibility: 16-SSOP (0.154", 3.90mm Width) / 16-QSOP
• Operating temperature range: -40°C ~ 85°C (TA)
• Moisture sensitivity: MSL 1 (Unlimited)

Substitute parts are grouped into two categories:

1. Direct Manufacturer Equivalent (MAX1653EEE+): Identical part number with "+" suffix, indicating active product status and updated compliance certification (ROHS3 Compliant vs. RoHS non-compliant).

2. Parametric Equivalent (MAX1655EEE+): Alternative base product number (MAX1655 vs. MAX1653) with identical electrical specifications, control features, package, and operating parameters, enabling functional substitution in applications where the specific part number variant is not critical.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production requiring active product status:

The MAX1653EEE+ is the primary recommended substitute. This part maintains identical electrical specifications and package compatibility with the obsolete MAX1653EEE while offering active product status and ROHS3 compliance certification. The direct part number relationship (MAX1653EEE+) ensures design continuity with minimal risk.

For applications where base product number flexibility exists:

The MAX1655EEE+ serves as a parametric equivalent substitute. All electrical specifications, control features, package dimensions, and operating parameters are identical to the MAX1653EEE. The MAX1655EEE+ offers active product status, ROHS3 compliance, and higher inventory availability (4400 Pcs vs. 2200 Pcs). Selection of this part requires confirmation that the MAX1655 base product number is compatible with the application circuit design.

Compliance considerations:

Both substitute parts (MAX1653EEE+ and MAX1655EEE+) are ROHS3 compliant, addressing regulatory requirements that may not be met by the obsolete MAX1653EEE (RoHS non-compliant). Both parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: What is the primary difference between MAX1653EEE and MAX1653EEE+?

A: The MAX1653EEE+ is the active product variant of the same base part number. Both share identical electrical specifications, package, and operating parameters. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. RoHS non-compliant). The "+" suffix indicates the updated compliance certification.

Q: Can MAX1655EEE+ be used as a direct replacement for MAX1653EEE?

A: Yes, the MAX1655EEE+ is a parametric equivalent. All electrical specifications, control features, package dimensions, and operating temperature ranges are identical. The difference is the base product number (MAX1655 vs. MAX1653). Substitution is valid provided the application circuit design does not require the specific MAX1653 part number designation.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three parts (MAX1653EEE, MAX1653EEE+, and MAX1655EEE+) use the 16-SSOP package with dimensions of 0.154" width and 3.90mm width. The supplier device package designation is 16-QSOP for all variants. PCB layout and footprint compatibility is maintained across all substitutes.

Q: What is the inventory status for each part?

A: MAX1653EEE (obsolete) has 2200 Pcs available. MAX1653EEE+ (active equivalent) has 2200 Pcs available. MAX1655EEE+ (parametric equivalent) has 4400 Pcs available, offering higher stock availability for production requirements.

Q: Do all parts support the same switching frequencies and duty cycle specifications?

A: Yes. All three parts support switching frequencies of 150kHz and 300kHz, with a maximum duty cycle of 98%. Synchronous rectifier and clock sync functionality are present on all variants. Operating temperature range is -40°C ~ 85°C (TA) across all parts.

Q: What compliance certifications apply to the substitute parts?

A: Both MAX1653EEE+ and MAX1655EEE+ are ROHS3 compliant and REACH Unaffected. Both carry EAR99 export classification. The obsolete MAX1653EEE is RoHS non-compliant, making the substitute parts necessary for applications subject to RoHS regulatory requirements.