LA5744TP-TL-E Equivalent & Substitute Parts

Part Overview

The LA5744TP-TL-E is a buck switching regulator IC manufactured by onsemi, designed for positive adjustable output applications with 3.1A switch current capability. This device operates across a 4.5V to 28V input range and delivers adjustable output from 1.23V to 28V at 300kHz switching frequency in a TO-252-5 DPAK package.

The LA5744TP-TL-E is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

LA5744TP-TL-E

onsemiIn Stock: 2115LA5744TP-TL-E Datasheet

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LM2595DSADJR4G

onsemiIn Stock: 2222LM2595DSADJR4G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LA5744TP-TL-E is evaluated based on the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator topology
• Output Configuration: Positive adjustable output
• Voltage Specifications: Input range 4.5V minimum to 28V maximum; output adjustable from 1.23V minimum
• Current Capability: Output current rating of 3.1A or higher
• Switching Frequency: 300kHz operation
• Package Compatibility: Surface mount DPAK or equivalent footprint
• Temperature Range: Operating range of -30°C to 125°C or wider

The LM2595DSADJR4G is identified as a substitute part. While it offers multi-topology capability (buck, boost, buck-boost), it operates as a buck regulator with positive adjustable output, meeting the core functional requirements. However, key differences exist in current rating, package form factor, and switching frequency that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The LM2595DSADJR4G is an active product from onsemi with ROHS3 compliance, providing supply chain continuity for obsolete LA5744TP-TL-E applications. Both devices share the same manufacturer, adjustable output topology, and minimum voltage specifications (1.23V).

Selection of the LM2595DSADJR4G requires evaluation of the following design constraints:

• Current Derating: The LM2595DSADJR4G provides 1A output current versus 3.1A for the LA5744TP-TL-E. Applications requiring the full 3.1A output current cannot use this substitute without circuit redesign.
• Package Footprint: The LM2595DSADJR4G uses TO-263-6 D2PAK (5 leads + tab) versus TO-252-5 DPAK (4 leads + tab) for the LA5744TP-TL-E. PCB layout modifications are required.
• Switching Frequency: The LM2595DSADJR4G operates at 150kHz versus 300kHz. This affects output filter design and EMI characteristics.
• Input Voltage Range: The LM2595DSADJR4G accepts up to 40V input versus 28V maximum for the LA5744TP-TL-E, providing extended operating range.
• Temperature Range: The LM2595DSADJR4G extends the lower operating limit to -40°C versus -30°C for the LA5744TP-TL-E.

Frequently Asked Questions (FAQ)

Q: Can the LM2595DSADJR4G directly replace the LA5744TP-TL-E in existing designs?

A: Direct replacement is not possible without circuit modifications. The LM2595DSADJR4G has reduced output current (1A versus 3.1A), different package pinout (5 leads versus 4 leads), and different switching frequency (150kHz versus 300kHz). PCB layout changes and output filter redesign are required.

Q: What is the primary limitation of using the LM2595DSADJR4G as a substitute?

A: The primary limitation is the reduced output current rating of 1A compared to the 3.1A capability of the LA5744TP-TL-E. Applications requiring higher current delivery cannot use this substitute without parallel configuration or alternative design approaches.

Q: Are both devices from the same manufacturer?

A: Yes, both the LA5744TP-TL-E and LM2595DSADJR4G are manufactured by onsemi, ensuring consistent design philosophy and support documentation.

Q: What are the package differences between these devices?

A: The LA5744TP-TL-E uses TO-252-5 DPAK packaging (4 leads + tab), while the LM2595DSADJR4G uses TO-263-6 D2PAK packaging (5 leads + tab). These are different footprints requiring PCB redesign.

Q: Does the LM2595DSADJR4G support the same output voltage range?

A: Both devices support adjustable output starting at 1.23V minimum. The LM2595DSADJR4G extends the maximum output to 37V versus 28V for the LA5744TP-TL-E, providing greater flexibility for higher voltage applications.

Q: What compliance certifications apply to the LM2595DSADJR4G?

A: The LM2595DSADJR4G is ROHS3 compliant. The LA5744TP-TL-E compliance status is not specified in the provided data.