LM3495MTCX Equivalent & Substitute Parts

Part Overview

The LM3495MTCX is a buck regulator positive output step-down DC-DC controller IC manufactured by Texas Instruments in a 16-TSSOP package. This device functions as a transistor driver for step-down topology applications with a single output phase. The product is currently obsolete, which necessitates identifying equivalent and substitute components for ongoing design requirements and production needs. Substitute parts must maintain functional compatibility across critical electrical parameters including supply voltage range, switching frequency, duty cycle, and control features.

Substiute Parts

LM3495MTCX

Texas InstrumentsIn Stock: 3137LM3495MTCX Datasheet

Current PartRFQ

LM27402MHX/NOPB

Texas InstrumentsIn Stock: 1707LM27402MHX/NOPB Datasheet

DirectRFQ

LM3495MTCX/NOPB

National SemiconductorIn Stock: 2300LM3495MTCX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM3495MTCX is determined by strict alignment of the following critical parameters:

Functional Requirements:

• Topology: Buck (step-down)
• Output Type: Transistor Driver
• Output Configuration: Positive
• Number of Outputs: 1
• Output Phases: 1

Electrical Compatibility:

• Voltage - Supply (Vcc/Vdd): Must support the 2.9V ~ 18V range or a compatible subset
• Frequency - Switching: Must support the 200kHz ~ 1.5MHz range or a compatible subset
• Duty Cycle (Max): Must support 96% or higher
• Synchronous Rectifier: Yes (required)
• Clock Sync: Yes (required)

Physical & Environmental:

• Package / Case: 16-TSSOP or compatible 16-pin TSSOP variant
• Operating Temperature: -40°C ~ 125°C (TJ) or wider range
• Mounting Type: Surface Mount

Control Features:

• Minimum required: Current Limit, Frequency Control, Tracking

Substitute parts identified below meet these criteria within the allowed parameter ranges specified in the input data.

Parameter Comparison

Engineering Selection Recommendations

LM27402MHX/NOPB (Primary Substitute): This part is manufactured by Texas Instruments and holds Active product status, providing long-term availability and supply chain stability. It is ROHS3 compliant, meeting modern regulatory requirements. The 16-PowerTSSOP package is a compatible variant of the 16-TSSOP footprint. The supply voltage range (3V ~ 20V) encompasses the original part's 2.9V ~ 18V specification. The maximum switching frequency of 1.2MHz is within the original 1.5MHz range. The duty cycle maximum of 95% is marginally lower than the original 96%, which may require design verification for applications requiring the full 96% duty cycle. Additional control features (Enable, Power Good, Soft Start) provide enhanced functionality beyond the original specification.

LM3495MTCX/NOPB (Direct Equivalent): This part maintains identical electrical specifications to the original LM3495MTCX, including supply voltage range (2.9V ~ 18V), switching frequency (200kHz ~ 1.5MHz), and duty cycle (96%). The 16-TSSOP package is identical to the original. Product status is Active, ensuring availability. Manufacturer is listed as National Semiconductor. This part provides the most direct functional equivalence with no parameter compromises.

Frequently Asked Questions (FAQ)

Q: Can LM27402MHX/NOPB be used as a direct replacement for LM3495MTCX?

A: LM27402MHX/NOPB is functionally compatible for most applications. The package is a compatible 16-PowerTSSOP variant. The primary consideration is the maximum duty cycle of 95% versus the original 96%. Applications requiring operation at or above 96% duty cycle require design verification. The LM27402MHX/NOPB offers additional control features and improved regulatory compliance (ROHS3).

Q: What is the difference between 16-TSSOP and 16-PowerTSSOP packages?

A: Both are 16-pin TSSOP packages with 0.173" width and 4.40mm width specification. The PowerTSSOP variant typically includes enhanced thermal characteristics. Pin compatibility and PCB footprint are compatible for substitution purposes.

Q: Is LM3495MTCX/NOPB identical to the original LM3495MTCX?

A: LM3495MTCX/NOPB maintains identical electrical and functional specifications. The primary difference is manufacturer designation (National Semiconductor versus Texas Instruments) and product status (Active versus Obsolete). Electrical performance and pin configuration are equivalent.

Q: Why is the original LM3495MTCX marked as Obsolete?

A: Product obsolescence is determined by manufacturer lifecycle decisions. Active substitute parts (LM27402MHX/NOPB and LM3495MTCX/NOPB) provide continued availability and support for this functional category.

Q: Are there supply voltage compatibility concerns with LM27402MHX/NOPB?

A: LM27402MHX/NOPB operates at 3V ~ 20V, while the original operates at 2.9V ~ 18V. The substitute part does not support operation below 3V. Applications requiring operation at 2.9V must use LM3495MTCX/NOPB or the original part.

Q: What control features differ between the substitute parts?

A: LM27402MHX/NOPB includes Enable, Power Good, and Soft Start features in addition to the core Current Limit, Frequency Control, and Tracking features. LM3495MTCX/NOPB matches the original feature set exactly. Additional features in LM27402MHX/NOPB may require design accommodation if not utilized.