Equivalent & Substitute Parts for KA3501

Part Overview

The KA3501 is a Power Supply Controller and Supervisor IC manufactured by onsemi, designed for power supply and supervisor applications. It operates with a supply voltage range of 5V to 32V and is packaged in a 14-DIP (0.300", 7.62mm) through-hole configuration. The KA3501 is classified as an obsolete product, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

KA3501

onsemiIn Stock: 3729KA3501 Datasheet

Current PartRFQ

LTC2939IMS#TRPBF

Analog Devices Inc.In Stock: 986LTC2939IMS#TRPBF Datasheet

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LTC2945CMS#PBF

Analog Devices Inc.In Stock: 2125LTC2945CMS#PBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the KA3501 is determined by the following critical parameters:

• Functional Category: Power Management (PMIC) - Power Supply Controller/Supervisor
• Supply Voltage Range: 5V ~ 32V operational capability
• Current Consumption: 3 mA supply current
• Operating Temperature Range: 0°C ~ 70°C
• Mounting Technology: Through-hole or surface-mount alternatives
• Package Compatibility: 14-DIP or equivalent pin-count packages
• Product Status: Active alternatives to obsolete part

The identified substitute parts (LTC2945CMS#PBF and LTC2939IMS#TRPBF) are both active power management ICs from Analog Devices Inc. that serve equivalent power supply monitoring and control functions. These parts maintain the same functional category and provide comparable electrical performance within overlapping operational parameters.

Parameter Comparison

Engineering Selection Recommendations

LTC2945CMS#PBF is suitable for applications where the supply voltage range is limited to 2.7V ~ 5.9V and through-hole mounting can be replaced with surface-mount technology. This part is ROHS3 compliant and active in production, providing long-term availability. The operating temperature range matches the KA3501 (0°C ~ 70°C), and supply current consumption is lower at 800 µA.

LTC2939IMS#TRPBF is applicable for systems requiring extended operating temperature range (-40°C ~ 85°C) and surface-mount packaging. However, the supply voltage range (1V ~ 5V) is narrower than the KA3501, limiting its use to lower-voltage applications. This part is active in production and maintains equivalent MSL and REACH compliance.

Both substitute parts are active products from Analog Devices Inc., ensuring ongoing availability and support compared to the obsolete KA3501. Selection between these alternatives depends on specific application voltage requirements and packaging constraints.

Frequently Asked Questions (FAQ)

Q: Can LTC2945CMS#PBF directly replace KA3501 in existing through-hole designs?

A: LTC2945CMS#PBF is a surface-mount device in 12-TSSOP packaging, whereas KA3501 uses through-hole 14-DIP packaging. Direct socket replacement is not possible without PCB redesign and adapter solutions.

Q: What is the primary difference between LTC2945CMS#PBF and LTC2939IMS#TRPBF?

A: LTC2945CMS#PBF operates at 2.7V ~ 5.9V supply voltage with 12-pin packaging, while LTC2939IMS#TRPBF operates at 1V ~ 5V with 16-pin packaging and supports extended temperature range (-40°C ~ 85°C). Both are surface-mount alternatives to the through-hole KA3501.

Q: Is the KA3501 still available for purchase?

A: The KA3501 is classified as obsolete. Substitute parts LTC2945CMS#PBF and LTC2939IMS#TRPBF are active products with confirmed inventory availability.

Q: What are the compliance differences between these parts?

A: All three parts maintain REACH Unaffected and EAR99 ECCN classifications. LTC2945CMS#PBF is ROHS3 compliant. All parts have MSL rating of 1 (Unlimited).

Q: Which substitute is better for high-temperature applications?

A: LTC2939IMS#TRPBF supports operating temperatures from -40°C ~ 85°C, compared to 0°C ~ 70°C for both KA3501 and LTC2945CMS#PBF. Selection depends on whether the extended lower temperature range is required for your application.