MP1580HS-LF Equivalent & Substitute Parts

Part Overview

The MP1580HS-LF is an active buck switching regulator IC manufactured by Monolithic Power Systems Inc., designed for step-down voltage conversion applications. This positive adjustable output regulator delivers 2A continuous current with an input voltage range of 4.75V to 25V and adjustable output from 1.22V to 21V. The device operates at 380kHz switching frequency with integrated synchronous rectification, housed in an 8-SOIC surface mount package. As an active product with full RoHS3 compliance and REACH unaffected status, substitute parts are identified to provide alternative packaging options or enhanced parameter ranges for specific application requirements.

Substiute Parts

MP1580HS-LF

Monolithic Power Systems Inc.In Stock: 1611MP1580HS-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 MP1580HS-LF is determined by functional equivalence across the following critical parameters: buck topology with positive adjustable output, 2A output current capability, synchronous rectification, and surface mount technology. The MP9942GJ-P qualifies as a manufacturer-recommended substitute based on matching core functional specifications while offering an expanded input voltage range (4V – 30V versus 4.75V – 25V) and lower minimum output voltage (0.8V versus 1.22V). The primary distinction between these parts is packaging format: the MP1580HS-LF uses 8-SOIC, while the MP9942GJ-P uses SOT-23-8 Thin (TSOT-23-8). Both devices maintain identical 2A output current, synchronous rectification, and operating temperature range. The substitution is valid where the application PCB layout and thermal requirements accommodate the smaller TSOT-23-8 package footprint.

Parameter Comparison

Engineering Selection Recommendations

Both the MP1580HS-LF and MP9942GJ-P are active products with full RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications. The MP9942GJ-P offers superior moisture sensitivity characteristics (MSL 1 with unlimited shelf life versus MSL 2 with 1-year limit), making it advantageous for long-term inventory management and applications with extended storage requirements. The MP9942GJ-P also provides an expanded input voltage operating range (4V – 30V) and lower minimum output voltage threshold (0.8V), enabling broader application flexibility. Selection between these parts should be based on PCB layout constraints and thermal management capabilities, as the TSOT-23-8 package occupies significantly less board area than the 8-SOIC package but may present different thermal dissipation characteristics depending on PCB design and copper area allocation.

Frequently Asked Questions (FAQ)

Q: Can the MP9942GJ-P directly replace the MP1580HS-LF without circuit modifications?

A: Functional substitution is valid provided the application circuit design accommodates the different package footprint. Both devices share identical output current (2A), synchronous rectification, and operating temperature specifications. The MP9942GJ-P's expanded input voltage range (4V – 30V) and lower minimum output voltage (0.8V) are backward compatible with applications designed for the MP1580HS-LF's specifications (4.75V – 25V input, 1.22V minimum output). PCB layout and thermal design must be re-evaluated for the smaller TSOT-23-8 package.

Q: What are the key differences between 8-SOIC and TSOT-23-8 packages?

A: The 8-SOIC package measures 0.154" (3.90mm) in width with a larger footprint suitable for applications with standard PCB routing and thermal requirements. The TSOT-23-8 (SOT-23-8 Thin) package is significantly smaller, enabling compact board designs and reduced PCB area. Thermal performance depends on copper area allocation and via placement in the PCB design; the smaller package may require optimized thermal management for equivalent heat dissipation.

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

A: Both parts maintain RoHS3 compliance and REACH unaffected status. The primary compliance distinction is moisture sensitivity: the MP9942GJ-P carries MSL 1 (unlimited shelf life) compared to the MP1580HS-LF's MSL 2 (1-year limit). This makes the MP9942GJ-P preferable for applications with extended storage or inventory management requirements.

Q: What switching frequency differences exist between these regulators?

A: The MP1580HS-LF operates at 380kHz, while the MP9942GJ-P operates at 410kHz. This 30kHz difference has minimal impact on most applications but may affect EMI characteristics and output filter design. Applications with specific EMI requirements should evaluate filter component values for the respective switching frequencies.

Q: Can the MP9942GJ-P handle the full input voltage range of the MP1580HS-LF?

A: Yes. The MP9942GJ-P's input voltage range (4V – 30V) encompasses and exceeds the MP1580HS-LF's range (4.75V – 25V). The substitute part operates safely across the original part's entire input voltage specification.