LT8335IDDB#PBF Equivalent & Substitute Parts

Part Overview

The LT8335IDDB#PBF is a Boost and SEPIC Switching Regulator IC manufactured by Analog Devices Inc., designed for positive or negative adjustable output applications. This device operates as a step-up or step-up/step-down converter with a maximum output current of 2A and supports input voltages from 3V to 25V. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

LT8335IDDB#PBF

Analog Devices Inc.In Stock: 935LT8335IDDB#PBF Datasheet

Current PartRFQ

LT8330IDDB#PBF

Analog Devices Inc.In Stock: 829LT8330IDDB#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LT8335IDDB#PBF is determined by alignment of the following critical parameters:

Topology and Function Compatibility: The substitute part must support Boost and SEPIC topologies with step-up and step-up/step-down functionality to maintain circuit operation.

Output Configuration: The substitute must provide positive or negative adjustable output capability to preserve design flexibility.

Voltage Specifications: Input voltage range, output voltage range (minimum and maximum), and output voltage adjustment capability must be compatible with the original design requirements.

Current Rating: The substitute must deliver sufficient output current for the application. Parts with lower current ratings represent downgrades and are suitable only for reduced-load applications.

Package and Pinout: The 8-WFDFN Exposed Pad package with 8-DFN (3x2) footprint ensures mechanical and electrical compatibility.

Switching Frequency: The 2MHz switching frequency must be maintained to preserve circuit performance and EMI characteristics.

Operating Temperature Range: The -40°C to 125°C junction temperature range must be supported.

Product Status and Compliance: Active product status ensures ongoing availability and support. RoHS3 compliance and REACH status provide regulatory alignment for current manufacturing standards.

Parameter Comparison

Engineering Selection Recommendations

The LT8330IDDB#PBF serves as the active equivalent substitute for the obsolete LT8335IDDB#PBF. Both devices share identical topology, output configuration, voltage adjustment capability, switching frequency, operating temperature range, package type, and MSL rating.

Key Differences:

The LT8330IDDB#PBF exhibits an expanded input voltage maximum rating of 40V compared to 25V on the LT8335IDDB#PBF, and an increased output voltage maximum of 60V versus 28V. The primary trade-off is a reduced output current rating of 1A on the LT8330IDDB#PBF versus 2A on the LT8335IDDB#PBF.

Substitution Applicability:

The LT8330IDDB#PBF is suitable for applications where the required output current does not exceed 1A. Applications requiring the full 2A output current of the LT8335IDDB#PBF cannot use the LT8330IDDB#PBF as a direct substitute.

Compliance and Availability:

The LT8330IDDB#PBF holds active product status with RoHS3 compliance and REACH unaffected designation, ensuring regulatory alignment and ongoing manufacturing support. The LT8335IDDB#PBF is obsolete, making the LT8330IDDB#PBF the recommended path for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the LT8330IDDB#PBF replace the LT8335IDDB#PBF in all applications?

A: The LT8330IDDB#PBF is compatible with applications where output current requirements do not exceed 1A. Applications requiring 2A output current must retain the LT8335IDDB#PBF or identify alternative 2A-rated regulators. Both devices support identical topologies, output configurations, and voltage adjustment ranges within their respective current ratings.

Q: What are the package compatibility considerations?

A: Both the LT8335IDDB#PBF and LT8330IDDB#PBF use the 8-WFDFN Exposed Pad package with 8-DFN (3x2) footprint. PCB layouts designed for the LT8335IDDB#PBF are mechanically and electrically compatible with the LT8330IDDB#PBF without modification.

Q: How do the input voltage ranges differ?

A: The LT8335IDDB#PBF accepts input voltages from 3V to 25V. The LT8330IDDB#PBF accepts input voltages from 3V to 40V. Applications operating within the 3V to 25V range are compatible with both devices. Applications requiring input voltages between 25V and 40V require the LT8330IDDB#PBF.

Q: What is the significance of the output voltage maximum difference?

A: The LT8335IDDB#PBF supports output voltages up to 28V, while the LT8330IDDB#PBF supports up to 60V. Applications requiring output voltages above 28V must use the LT8330IDDB#PBF. Applications operating below 28V are compatible with both devices.

Q: Why is the LT8335IDDB#PBF classified as obsolete?

A: Obsolete status indicates that the LT8335IDDB#PBF is no longer in active production. The LT8330IDDB#PBF represents the active product line continuation from Analog Devices Inc. for this regulator family.

Q: Are there compliance differences between the two parts?

A: The LT8330IDDB#PBF carries RoHS3 compliance and REACH unaffected designation. The LT8335IDDB#PBF compliance documentation is not provided in the available parameters. For new designs subject to RoHS3 or REACH requirements, the LT8330IDDB#PBF is the appropriate selection.

Q: How does the switching frequency affect circuit design?

A: Both devices operate at 2MHz switching frequency. Circuit designs including inductor selection, output filtering, and EMI considerations based on 2MHz operation are directly transferable between the two parts.

Q: What is the thermal operating range for both devices?

A: Both the LT8335IDDB#PBF and LT8330IDDB#PBF operate across a junction temperature range of -40°C to 125°C, supporting identical thermal specifications for circuit design and thermal management calculations.