LA5744MP-DL-E Equivalent & Substitute Parts

Part Overview

The LA5744MP-DL-E is a buck switching regulator IC manufactured by onsemi, designed for positive adjustable output applications with a maximum output current of 3.1A. This component operates as a step-down converter with an adjustable output voltage range from 1.23V to 28V and an input voltage range of 4.5V to 28V. The device is mounted in a TO-252-6 DPAK package with 5 leads plus tab.

The LA5744MP-DL-E is classified as obsolete. Identifying equivalent 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

LA5744MP-DL-E

onsemiIn Stock: 2530LA5744MP-DL-E Datasheet

Current PartRFQ

LM2595DSADJR4G

onsemiIn Stock: 2222LM2595DSADJR4G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LA5744MP-DL-E is evaluated based on the following critical parameters:

Functional Compatibility Criteria:

• Topology: Buck (step-down) configuration
• Output Configuration: Positive adjustable output
• Minimum Output Voltage: 1.23V or lower
• Input Voltage Range: Minimum 4.5V support
• Output Current Capability: Equal to or greater than 3.1A
• Number of Outputs: Single output
• Mounting Type: Surface mount

Mechanical Compatibility Criteria:

• Package Type: TO-252-6 DPAK or equivalent footprint compatibility
• Lead Count: 5 leads plus tab

The LM2595DSADJR4G is identified as a substitute part. While this device offers expanded functionality (buck, boost, and buck-boost topologies) and higher input voltage capability (40V maximum), it operates within the functional envelope required for buck-only applications. However, the output current rating of 1A is lower than the LA5744MP-DL-E specification of 3.1A, which represents a functional limitation for applications requiring the full current capacity of the original part.

Parameter Comparison

Engineering Selection Recommendations

The LM2595DSADJR4G is an active product from onsemi and represents a viable substitute for obsolete LA5744MP-DL-E applications where output current requirements do not exceed 1A. The substitute part maintains compatibility with the minimum input voltage (4.5V), minimum output voltage (1.23V), and adjustable output configuration of the original design.

Key considerations for selection:

Advantages of LM2595DSADJR4G:

• Active product status ensures ongoing availability and supply chain support
• RoHS3 compliance provides environmental and regulatory alignment
• Extended input voltage range (40V maximum) offers design flexibility
• Wider operating temperature range (-40°C to 125°C) supports broader environmental conditions
• Multi-topology capability (buck, boost, buck-boost) enables flexible circuit configurations

Limitations of LM2595DSADJR4G:

• Output current rating of 1A is 68% lower than the LA5744MP-DL-E (3.1A), restricting use to lower-power applications
• Package footprint differs (D2PAK versus DPAK), requiring PCB layout modifications
• Switching frequency of 150kHz is lower than the original 300kHz, affecting filter component sizing and efficiency characteristics

Selection of the LM2595DSADJR4G is appropriate only for applications where the 1A output current limit is acceptable and PCB redesign is feasible.

Frequently Asked Questions (FAQ)

Q: Can the LM2595DSADJR4G directly replace the LA5744MP-DL-E without PCB modifications?

A: No. The LM2595DSADJR4G uses a D2PAK (TO-263-6) package, while the LA5744MP-DL-E uses a DPAK (TO-252-6) package. These packages have different footprints and pin configurations, requiring PCB layout changes. Pin-to-pin compatibility cannot be assumed.

Q: What is the primary limitation when substituting with the LM2595DSADJR4G?

A: The output current capability is reduced from 3.1A to 1A. Applications requiring output currents above 1A cannot use this substitute without exceeding the device's rated specifications.

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

A: The LA5744MP-DL-E lists REACH Unaffected status. The LM2595DSADJR4G is RoHS3 compliant and also REACH Unaffected. Both parts carry EAR99 ECCN classification and identical HTSUS codes (8542.39.0001).

Q: How do the switching frequencies affect circuit design?

A: The LA5744MP-DL-E operates at 300kHz, while the LM2595DSADJR4G operates at 150kHz. Lower switching frequency requires larger filter inductors and capacitors to achieve equivalent ripple performance, affecting PCB size and component cost.

Q: Is the LM2595DSADJR4G suitable for applications requiring positive output only?

A: Yes. Although the LM2595DSADJR4G supports positive or negative output configurations, it can be configured for positive output only, matching the LA5744MP-DL-E functional requirement.

Q: What is the impact of the extended input voltage range on design?

A: The LM2595DSADJR4G accepts input voltages up to 40V compared to 28V for the LA5744MP-DL-E. This provides additional design margin for input voltage transients and allows use in higher-voltage supply systems, though it does not affect compatibility with 28V or lower input sources.