LTC4444MPMS8E Equivalent & Substitute Parts

Part Overview

The LTC4444MPMS8E is a gate driver integrated circuit manufactured by Analog Devices Inc., designed for half-bridge and synchronous switching applications. This device functions as a high-side or low-side gate driver for N-channel MOSFETs in power management circuits. The part is classified as obsolete, which necessitates identification of active equivalent alternatives to maintain design continuity and ensure long-term component availability for new production and field replacements.

Substiute Parts

LTC4444MPMS8E

Analog Devices Inc.In Stock: 757LTC4444MPMS8E Datasheet

Current PartRFQ

LTC4444MPMS8E#PBF

Analog Devices Inc.In Stock: 2389LTC4444MPMS8E#PBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete LTC4444MPMS8E is based on strict electrical and mechanical parameter matching within the Analog Devices LTC4444 gate driver family. The primary substitute, LTC4444MPMS8E#PBF, maintains compatibility through the following critical parameters:

Electrical Compatibility Criteria:

• Identical supply voltage range (7.2V ~ 13.5V)
• Identical peak output current specifications (2.5A source, 3A sink)
• Identical bootstrap voltage rating (114 V maximum)
• Identical package and pinout (8-MSOP-EP)
• Non-inverting input configuration
• N-channel MOSFET gate drive capability

Mechanical Compatibility Criteria:

• Identical surface mount package footprint (8-MSOP, 0.118" width, 3.00mm)
• Identical exposed pad configuration
• Identical moisture sensitivity level (MSL 1)

The substitute part differs in driven configuration (half-bridge versus high-side or low-side), channel type (independent versus synchronous), logic voltage thresholds, rise/fall times, and operating temperature range. These differences do not preclude substitution when the application requirements align with the substitute's specifications.

Parameter Comparison

Engineering Selection Recommendations

LTC4444MPMS8E#PBF is the direct equivalent substitute for the obsolete LTC4444MPMS8E. Selection of this substitute is based on the following engineering factors:

Product Status: The substitute part carries active product status from Analog Devices Inc., ensuring ongoing availability, manufacturing support, and technical documentation. The main part is classified as obsolete, creating supply chain risk for new production and field service applications.

Compliance and Certifications: The substitute part is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Electrical Equivalence: The substitute maintains all critical electrical parameters including supply voltage range, output current ratings, bootstrap voltage, and input logic configuration. The extended operating temperature range of the substitute (-55°C to 150°C versus -40°C to 150°C) provides additional thermal margin for demanding applications.

Mechanical Compatibility: Identical package footprint, pinout, and exposed pad configuration ensure direct PCB-level compatibility without layout modifications.

Packaging: The substitute is supplied in tube packaging, which is standard for production environments and field service applications.

Frequently Asked Questions (FAQ)

Q: Can LTC4444MPMS8E#PBF be used as a direct replacement for LTC4444MPMS8E in existing designs?

A: Yes. Both parts share identical electrical specifications for supply voltage, output current, bootstrap voltage, and package footprint. PCB layout and component placement require no modification. Schematic-level design review is recommended to confirm that the substitute's driven configuration (half-bridge) and channel type (independent) align with application requirements.

Q: What is the difference between the driven configuration specifications?

A: The main part specifies high-side or low-side configuration, while the substitute specifies half-bridge configuration. The substitute's half-bridge topology supports both high-side and low-side gate drive functions, making it functionally compatible with applications designed for either configuration.

Q: Are there differences in logic voltage thresholds between these parts?

A: Yes. The main part specifies VIL/VIH of 2.75V/2.25V, while the substitute specifies 1.85V/3.25V. These differences affect input signal interpretation. Applications with marginal input signal levels should be evaluated to confirm compatibility with the substitute's threshold specifications.

Q: What is the significance of the rise and fall time differences?

A: The main part specifies rise/fall times of 80ns/50ns, while the substitute specifies 8ns/5ns. The substitute exhibits significantly faster switching transitions. Applications sensitive to switching speed, EMI characteristics, or gate charge timing should be analyzed to confirm that faster transitions do not introduce adverse effects.

Q: Is the extended operating temperature range of the substitute beneficial?

A: The substitute operates from -55°C to 150°C versus -40°C to 150°C for the main part. The extended lower temperature limit provides additional thermal margin for applications in cold environments or with stringent reliability requirements.

Q: What packaging options are available for the substitute?

A: The substitute is supplied in tube packaging, which is standard for production quantities and field service applications. Tube packaging provides protection during handling and storage while maintaining component traceability.

Q: Are there any compliance or regulatory differences?

A: Both parts share identical ECCN and HTSUS classifications. The substitute is RoHS3 compliant and REACH unaffected, meeting current environmental regulations. The main part's compliance status is not specified in the provided data.

Q: What is the inventory status for these parts?

A: The main part (LTC4444MPMS8E) has 709 pieces in stock with obsolete status. The substitute (LTC4444MPMS8E#PBF) has 2301 pieces in stock with active product status, indicating superior long-term availability.