MAX1935ETA-T Equivalent & Substitute Parts

Part Overview

The MAX1935ETA-T is a linear voltage regulator IC from Analog Devices Inc./Maxim Integrated, designed for positive adjustable output applications with 500mA current capability in an 8-TDFN (3x3) surface mount package. The device is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. This reference provides qualified alternatives that maintain electrical and mechanical compatibility within the specified parameter envelope.

Substiute Parts

MAX1935ETA-T

Analog Devices Inc./Maxim IntegratedIn Stock: 17894MAX1935ETA-T Datasheet

Current PartRFQ

MAX1935ETA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 4500MAX1935ETA+T Datasheet

DirectRFQ

RT9186AGQV

Richtek USA Inc.In Stock: 20398RT9186AGQV Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX1935ETA-T is determined by strict alignment across the following critical parameters:

Electrical Compatibility Requirements:

• Output configuration (positive)
• Output type (adjustable)
• Voltage input maximum (5.5V)
• Voltage output range (0.8V minimum to 4.5V maximum)
• Current output (500mA)
• Operating temperature range (-40°C ~ 85°C)
• Control features (Enable, Power Good)

Mechanical Compatibility Requirements:

• Surface mount technology
• 8-pin package format with exposed pad
• 3x3mm footprint compatibility

Compliance Requirements:

• RoHS3 compliance
• EAR99 classification
• HTSUS code 8542.39.0001

The substitute parts listed below meet all electrical and mechanical requirements. Differences in quiescent current, dropout voltage, and package designation (WDFN vs. VDFN) are within acceptable tolerance for functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

MAX1935ETA+T (Direct Equivalent): This part is the direct substitute for MAX1935ETA-T. Both are manufactured by Analog Devices Inc./Maxim Integrated with identical electrical specifications and package designation. The MAX1935ETA+T carries active product status, ensuring long-term availability and supply chain continuity. This part is recommended as the primary replacement for obsolete MAX1935ETA-T applications. Packaging format differs (Cut Tape & Digi-Reel® vs. standard tape), but electrical and mechanical compatibility is complete.

RT9186AGQV (Functional Equivalent): The RT9186AGQV from Richtek USA Inc. meets all critical electrical and mechanical requirements for substitution. Key differences include lower quiescent current (250 µA vs. 400 µA), improved dropout voltage (0.22V vs. 0.275V), and package designation (8-VDFN vs. 8-WDFN). Both packages are 3x3mm exposed pad variants with identical pinout compatibility. The RT9186AGQV carries active product status and ROHS3 compliance. Moisture sensitivity level is MSL 3 (168 hours) compared to MSL 1 for the original part. This part is suitable for applications where lower quiescent current provides system-level benefits.

Both substitute parts maintain compliance with RoHS3 and EAR99 classifications, ensuring regulatory alignment with the original design.

Frequently Asked Questions (FAQ)

Q: Can MAX1935ETA+T be used as a direct replacement for MAX1935ETA-T? A: Yes. Both parts are manufactured by Analog Devices Inc./Maxim Integrated with identical electrical specifications, output voltage range (0.8V to 4.5V), 500mA output current, and control features (Enable, Power Good). Package designation and pinout are identical. The primary difference is product status (Active vs. Obsolete) and packaging format.

Q: What are the key differences between MAX1935ETA+T and RT9186AGQV? A: Both parts meet the core electrical requirements (5.5V input maximum, 0.8V to 4.5V adjustable output, 500mA output current, -40°C to 85°C operating range). Differences include: quiescent current (400 µA vs. 250 µA), dropout voltage (0.275V vs. 0.22V), package designation (WDFN vs. VDFN), and moisture sensitivity level (MSL 1 vs. MSL 3). Both are 8-pin surface mount packages with 3x3mm footprints and exposed pads.

Q: Are the WDFN and VDFN packages mechanically compatible? A: Both packages are 8-pin, 3x3mm surface mount variants with exposed pads. Pinout and footprint are compatible for PCB layout purposes. Consult device datasheets for specific thermal and electrical performance characteristics related to package construction.

Q: What is the impact of different moisture sensitivity levels? A: MAX1935ETA-T and MAX1935ETA+T have MSL 1 (Unlimited shelf life). RT9186AGQV has MSL 3 (168-hour floor life after moisture exposure). MSL 3 components require controlled storage and handling procedures to prevent moisture absorption. Selection depends on supply chain and storage capabilities.

Q: Can RT9186AGQV be used in all MAX1935ETA-T applications? A: RT9186AGQV meets all specified electrical and mechanical requirements for functional equivalence. The lower quiescent current (250 µA vs. 400 µA) and improved dropout voltage (0.22V vs. 0.275V) are beneficial for most applications. Verify control feature compatibility and protection feature requirements (RT9186AGQV omits short circuit protection) against specific circuit design needs.

Q: Are all substitute parts RoHS3 compliant? A: Yes. MAX1935ETA+T and RT9186AGQV are both ROHS3 compliant, matching the original MAX1935ETA-T specification.