Equivalent & Substitute Parts Reference: PT6405B

Part Overview

The PT6405B from Texas Instruments is a non-isolated PoL (Point-of-Load) DC-DC converter module, providing a regulated 3.3V output at up to 3A with a 4.5V–5.5V input range. This component is designed for ITE (Commercial) applications and features surface mount packaging in a 12-SIP SMD module format. The PT6405B is classified as obsolete, necessitating the identification of substitute part numbers to ensure ongoing supply for engineering and production requirements.

Substiute Parts

PT6405B

Texas InstrumentsIn Stock: 902PT6405B Datasheet

Current PartRFQ

R-733.3D

Recom PowerIn Stock: 60046R-733.3D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute selection for non-isolated PoL DC-DC converter modules is based strictly on matching electrical and mechanical parameters necessary for compatibility. These include: input and output voltages, maximum output current, number of outputs, module type, compliance status, package form factor, and application category. Only components meeting or exceeding the minimum and maximum specified values for these parameters are considered valid substitutes.

Parameter Comparison

Engineering Selection Recommendations

The PT6405B has been designated as obsolete, making ongoing support and sourcing infeasible for new designs and production. Substitute selection should be based on matching compliance standards including RoHS3 and REACH statuses, as well as Moisture Sensitivity Level (MSL). Only parts with equivalent regulatory statuses and documented compliance can be considered for direct substitution in commercial ITE applications.

Frequently Asked Questions (FAQ)

Q: What are the critical substitution criteria for PT6405B?
A: Substitute modules must match the electrical ratings (output voltage 3.3V, current 3A), input voltage range starting from 4.5V, number of outputs (1), compliance, and application category.

Q: Is the mounting type of substitute parts always the same as PT6405B?
A: Mounting type must be evaluated against board design requirements. PT6405B is surface mount, while substitutes may be through-hole; mechanical compatibility must be verified based on provided format.

Q: Can R-733.3D be used in systems designed for PT6405B?
A: R-733.3D meets matching input/output voltage, current, application, and compliance levels, but features a different mounting style and a broader input range. Package and module form factor comparison is advised.

Q: Are all substitute modules RoHS and REACH compliant?
A: Both PT6405B and R-733.3D are listed as ROHS3 compliant and REACH unaffected, suitable for commercial regulatory environments as provided.

Q: How should package and assembly be considered during substitution?
A: Package type (12-SIP SMD vs. 12-SIP Module, mounting style) directly affects PCB layout and assembly processes. Only modules matching the required packaging constraints should be selected.