FDG6331L Equivalent & Substitute Parts

Part Overview

The FDG6331L is a power switch/driver IC featuring a single P-Channel output configuration rated for 800mA maximum output current. Designed for high-side switching applications, this component operates across a 2.5V to 8V load voltage range with a typical on-resistance of 155mOhm. The device is housed in a 6-TSSOP SC-88 package suitable for surface mount applications.

The FDG6331L is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and system updates.

Substiute Parts

FDG6331L

onsemiIn Stock: 26449FDG6331L Datasheet

Current PartRFQ

NTJD1155LT1G

onsemiIn Stock: 41496NTJD1155LT1G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDG6331L is determined by the following critical parameters:

• Package Compatibility: Both main and substitute parts must use the 6-TSSOP SC-88 SOT-363 package to ensure mechanical and electrical compatibility with existing PCB layouts.
• Output Configuration: The substitute must support P-Channel output for high-side switching applications.
• Voltage Rating: Load voltage range must encompass or exceed the 2.5V to 8V specification.
• Current Capability: Output current rating must meet or exceed 800mA to handle the same load requirements.
• On-Resistance: Rds On characteristics must be comparable to ensure similar thermal and switching performance.
• Operating Temperature Range: Must support the -55°C to 150°C junction temperature range.
• Manufacturer Availability: Active product status with confirmed inventory ensures long-term supply chain viability.

The NTJD1155LT1G qualifies as a substitute based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

The NTJD1155LT1G is suitable as a substitute for the FDG6331L based on the following engineering criteria:

• Package Equivalence: Both components use identical 6-TSSOP SC-88 SOT-363 packaging, ensuring direct PCB compatibility without layout modifications.
• Electrical Performance: The substitute provides 1.3A continuous drain current, exceeding the 800mA requirement of the main part. On-resistance of 175mOhm (max) is within acceptable tolerance of the 155mOhm typical specification.
• Voltage Compatibility: The 8V Vdss rating of the substitute accommodates the 2.5V to 8V load voltage range of the original design.
• Temperature Range: Identical operating temperature specification (-55°C to 150°C) ensures thermal performance parity.
• Product Status and Compliance: The NTJD1155LT1G is an active product with confirmed inventory availability. RoHS3 compliance and REACH unaffected status provide regulatory assurance for new production.

Frequently Asked Questions (FAQ)

Q: Can the NTJD1155LT1G directly replace the FDG6331L without PCB modifications?

A: Yes. Both components share identical 6-TSSOP SC-88 SOT-363 packaging. Pin-to-pin compatibility is maintained, allowing direct substitution without PCB layout changes.

Q: How do the current ratings compare between these parts?

A: The FDG6331L is rated for 800mA maximum output current. The NTJD1155LT1G provides 1.3A continuous drain current at 25°C, offering 62.5% additional current capacity. This headroom improves thermal performance and design margin.

Q: Are there differences in on-resistance that affect circuit performance?

A: The FDG6331L specifies 155mOhm typical on-resistance. The NTJD1155LT1G specifies 175mOhm maximum on-resistance at 1.2A and 4.5V. This 12.9% difference is within acceptable engineering tolerance for most high-side switching applications and results in minimal additional power dissipation.

Q: Does the NTJD1155LT1G support the same voltage range?

A: The FDG6331L operates with 2.5V to 8V load voltage. The NTJD1155LT1G is rated for 8V Vdss, which encompasses the upper limit and is compatible with the specified voltage range.

Q: What is the significance of the NTJD1155LT1G being an active product?

A: Active product status ensures long-term availability and supply chain continuity. The FDG6331L is obsolete, making the active NTJD1155LT1G a reliable alternative for current and future production requirements.

Q: Are there compliance or regulatory differences between these parts?

A: The FDG6331L carries REACH Unaffected status. The NTJD1155LT1G provides both RoHS3 compliance and REACH Unaffected status, offering enhanced regulatory coverage for applications requiring stricter environmental compliance.