MP1580HP-LF Equivalent & Substitute Parts

Part Overview

The MP1580HP-LF is a buck switching regulator IC from Monolithic Power Systems Inc., designed for step-down voltage conversion with positive adjustable output. This component delivers 2A output current across a wide input voltage range of 4.75V to 25V, with adjustable output voltage from 1.22V to 21V. The device operates at 380kHz switching frequency and includes synchronous rectification for improved efficiency.

The MP1580HP-LF carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's product line. For new applications or when stock availability becomes critical, identifying functionally equivalent alternatives is essential for design continuity and supply chain management.

Substiute Parts

MP1580HP-LF

Monolithic Power Systems Inc.In Stock: 18741MP1580HP-LF Datasheet

Current PartRFQ

MP9942GJ-P

Monolithic Power Systems Inc.In Stock: 2041MP9942GJ-P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP1580HP-LF is determined by the following critical parameters:

• Topology & Function: Buck (step-down) converter with positive adjustable output
• Output Current Rating: 2A minimum
• Input Voltage Compatibility: Minimum 4.75V, maximum 25V
• Output Voltage Adjustability: Minimum 1.22V, maximum 21V
• Synchronous Rectification: Required for efficiency equivalence
• Operating Temperature Range: -40°C to 125°C
• Manufacturer: Monolithic Power Systems Inc. (same manufacturer ensures design compatibility)

The MP9942GJ-P qualifies as a substitute based on these parameters. While it differs in mounting technology (surface mount vs. through hole) and package form factor, it maintains functional equivalence in topology, output current capability, input/output voltage ranges, and thermal specifications. The MP9942GJ-P extends the input voltage range to 30V and lowers the minimum output voltage to 0.8V, providing broader application flexibility.

Parameter Comparison

Engineering Selection Recommendations

For Existing Designs Using MP1580HP-LF:

The MP1580HP-LF remains suitable for production continuation where through-hole mounting and 8-DIP package form factor are established in the PCB layout. Current inventory of 18,720 units supports ongoing production requirements. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring equivalent environmental qualification.

For New Design Implementations:

The MP9942GJ-P is the recommended selection. As an active product with manufacturer support, it provides design continuity with Monolithic Power Systems Inc. The surface-mount TSOT-23-8 package aligns with modern PCB assembly practices and reduces board space requirements compared to through-hole DIP packaging. The extended input voltage range (4V to 30V) and expanded output voltage range (0.8V to 28.5V) accommodate broader application requirements. Switching frequency variance of 30kHz (410kHz vs. 380kHz) remains within acceptable tolerance for most buck converter applications.

Compliance & Certification:

Both parts carry identical RoHS3 compliance and MSL-1 ratings, eliminating environmental qualification concerns during substitution. REACH unaffected status applies to both devices.

Frequently Asked Questions (FAQ)

Q: Can MP9942GJ-P directly replace MP1580HP-LF in existing PCB assemblies?

A: Functional substitution is possible, but physical substitution requires PCB redesign. The MP1580HP-LF uses through-hole 8-DIP mounting, while MP9942GJ-P requires surface-mount TSOT-23-8 footprint. Pin configuration and electrical function are compatible; however, board layout and assembly process changes are mandatory.

Q: What are the key electrical differences between these parts?

A: Both devices maintain identical 2A output current, buck topology, and positive adjustable output configuration. The MP9942GJ-P extends input voltage range from 4.75V–25V to 4V–30V and output voltage range from 1.22V–21V to 0.8V–28.5V. Switching frequency differs by 30kHz (380kHz vs. 410kHz), which does not affect functional equivalence for standard applications.

Q: Why is MP1580HP-LF marked "Not For New Designs"?

A: This designation indicates the manufacturer has transitioned this product to end-of-life status in favor of newer alternatives. MP9942GJ-P represents the active product line continuation with ongoing manufacturer support and development.

Q: Are there thermal or reliability differences between the packages?

A: Both parts operate across -40°C to 125°C junction temperature range with identical MSL-1 ratings. Surface-mount TSOT-23-8 packaging typically provides superior thermal performance due to reduced lead inductance and improved PCB thermal coupling compared to through-hole DIP. Operating temperature specifications remain equivalent.

Q: What considerations apply to switching frequency differences?

A: The 30kHz frequency variance (380kHz to 410kHz) represents an 8% increase. This affects output filter design and EMI characteristics minimally for most applications. Existing filter component values designed for MP1580HP-LF remain functional with MP9942GJ-P; however, filter optimization for the higher frequency may improve performance.

Q: Are both parts available in equivalent quantities?

A: MP1580HP-LF inventory stands at 18,720 units. MP9942GJ-P inventory is 2,002 units. For high-volume production transitions, lead time and allocation planning with the manufacturer are recommended.