MP2354DS-LF-Z Equivalent & Substitute Parts

Part Overview

The MP2354DS-LF-Z is a buck switching regulator IC from Monolithic Power Systems designed for positive adjustable output applications. It delivers 2A output current with an input voltage range of 4.75V to 23V and adjustable output voltage from 1.222V to 20.7V. The device operates at 380kHz switching frequency and includes a synchronous rectifier for improved efficiency.

The MP2354DS-LF-Z carries a "Not For New Designs" product status, indicating it has been superseded. Identifying equivalent substitute parts is necessary for ongoing production support, legacy system maintenance, and design continuity where this regulator is currently deployed.

Substiute Parts

MP2354DS-LF-Z

Monolithic Power SystemsIn Stock: 18273MP2354DS-LF-Z Datasheet

Current PartRFQ

MP2392GTL-Z

Monolithic Power Systems Inc.In Stock: 793MP2392GTL-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The MP2392GTL-Z qualifies as a functional substitute for the MP2354DS-LF-Z based on the following core electrical and mechanical parameters:

Substitution Criteria:

• Both devices are buck switching regulators with positive adjustable output configuration
• Both deliver 2A output current
• Both feature synchronous rectification
• Both are manufactured by Monolithic Power Systems
• Input voltage ranges overlap sufficiently (MP2354DS-LF-Z: 4.75V–23V; MP2392GTL-Z: 4.2V–24V)
• Output voltage ranges overlap (MP2354DS-LF-Z: 1.222V–20.7V; MP2392GTL-Z: 0.8V–13V)
• Both are ROHS3 compliant and carry EAR99 ECCN classification

Key Differences:

• Package format differs (8-SOIC vs. SOT-583)
• Switching frequency differs (380kHz vs. 650kHz)
• Operating temperature range differs (TA -40°C to 85°C vs. TJ -40°C to 125°C)
• Product status differs (Not For New Designs vs. Active)
• MSL rating differs (2 vs. 1)

Parameter Comparison

Engineering Selection Recommendations

The MP2392GTL-Z is an active product from the same manufacturer and represents a direct functional alternative to the obsolete MP2354DS-LF-Z. Both devices meet ROHS3 compliance and carry identical ECCN and HTSUS classifications, ensuring regulatory equivalence.

Selection of the MP2392GTL-Z requires verification of the following design constraints:

• Package compatibility: The MP2392GTL-Z uses SOT-583 packaging versus the 8-SOIC package of the MP2354DS-LF-Z. PCB layout and footprint modifications are necessary.
• Output voltage ceiling: The MP2392GTL-Z maximum output voltage is 13V, compared to 20.7V for the MP2354DS-LF-Z. Applications requiring output voltages above 13V cannot use this substitute.
• Thermal environment: The MP2392GTL-Z operates to 125°C junction temperature versus 85°C ambient for the MP2354DS-LF-Z, providing improved thermal margin in high-temperature applications.
• Switching frequency: The higher 650kHz switching frequency of the MP2392GTL-Z may reduce output filter component size but requires validation of EMI performance in the target application.
• Moisture sensitivity: The MP2392GTL-Z carries MSL 1 (unlimited shelf life) versus MSL 2 (1 year) for the MP2354DS-LF-Z, reducing moisture-related handling constraints.

Frequently Asked Questions (FAQ)

Q: Can the MP2392GTL-Z directly replace the MP2354DS-LF-Z without design changes?

A: No. While both are 2A buck regulators with adjustable positive output, the package format differs (SOT-583 vs. 8-SOIC), requiring PCB footprint redesign. Additionally, the maximum output voltage of the MP2392GTL-Z is limited to 13V, which may not be suitable for all applications using the MP2354DS-LF-Z.

Q: What is the primary reason for substitution?

A: The MP2354DS-LF-Z carries "Not For New Designs" status, indicating end-of-life. The MP2392GTL-Z is an active product from the same manufacturer with equivalent electrical performance for applications within its specified output voltage range.

Q: Are there input voltage compatibility concerns?

A: The input voltage ranges are compatible. The MP2392GTL-Z accepts 4.2V to 24V input, which encompasses the MP2354DS-LF-Z range of 4.75V to 23V. No input supply modifications are required.

Q: How does the higher switching frequency affect circuit design?

A: The MP2392GTL-Z operates at 650kHz versus 380kHz for the MP2354DS-LF-Z. This allows use of smaller output filter inductors and capacitors but requires validation of conducted and radiated EMI performance in the target application.

Q: What are the package-related considerations?

A: The MP2354DS-LF-Z uses 8-SOIC (0.154", 3.90mm width) while the MP2392GTL-Z uses SOT-583. These are physically different packages requiring new PCB layout, schematic symbol updates, and component placement verification.

Q: Are regulatory certifications equivalent?

A: Yes. Both devices are ROHS3 compliant, carry EAR99 ECCN classification, and share the same HTSUS code (8542.39.0001), ensuring regulatory equivalence for export and environmental compliance purposes.

Q: What is the impact of different operating temperature ranges?

A: The MP2354DS-LF-Z specifies -40°C to 85°C ambient temperature (TA), while the MP2392GTL-Z specifies -40°C to 125°C junction temperature (TJ). For applications operating near thermal limits, the MP2392GTL-Z provides improved margin. Thermal modeling is required for high-temperature environments.