MP2119DQ-LF-Z Equivalent & Substitute Parts

Part Overview

The MP2119DQ-LF-Z is a buck switching regulator IC from Monolithic Power Systems Inc., designed for positive adjustable step-down voltage regulation with a 2A output current capability. This device operates across a 2.7V to 6V input range and delivers adjustable output voltage from 0.8V to 5.4V at 1.5MHz switching frequency with integrated synchronous rectification.

The MP2119DQ-LF-Z carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's product line. For new applications or when current inventory becomes unavailable, identifying functionally equivalent alternatives is essential for design continuity and supply chain management.

Substiute Parts

MP2119DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 22091MP2119DQ-LF-Z Datasheet

Current PartRFQ

MP2162AGQH-Z

Monolithic Power SystemsIn Stock: 15144MP2162AGQH-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP2119DQ-LF-Z is determined by the following critical parameters:

• Topology & Function: Buck switching regulator with step-down capability
• Output Configuration: Positive adjustable voltage regulation
• Output Current Rating: 2A minimum
• Switching Frequency: 1.5MHz operation
• Synchronous Rectification: Integrated synchronous rectifier required
• Input Voltage Compatibility: Minimum 2.7V input support
• Regulatory Compliance: ROHS3 compliance and EAR99 classification

The MP2162AGQH-Z qualifies as a direct substitute based on matching topology, output current rating, switching frequency, and synchronous rectification capability. While the MP2162AGQH-Z offers extended output voltage range (0.6V to 6V) and improved operating temperature range (-40°C to 125°C), these represent functional enhancements rather than deviations from the core substitution criteria.

Parameter Comparison

Engineering Selection Recommendations

The MP2162AGQH-Z is the manufacturer-recommended substitute for the MP2119DQ-LF-Z. Both devices maintain ROHS3 compliance and EAR99 classification, ensuring regulatory consistency across design transitions.

The MP2162AGQH-Z carries Active product status, providing long-term availability and supply chain stability compared to the obsolete MP2119DQ-LF-Z. The substitute device is currently in production with 15,114 units in stock.

Package geometry differs between the two devices: the MP2119DQ-LF-Z uses a 10-QFN (3x3mm) footprint, while the MP2162AGQH-Z employs a smaller 8-QFN (2x1.5mm) footprint. PCB layout modifications are required for physical integration.

The MP2162AGQH-Z provides extended operating temperature range (up to 125°C junction temperature versus 85°C ambient for the original) and broader output voltage capability (0.6V to 6V versus 0.8V to 5.4V), supporting a wider range of application requirements without functional compromise.

Frequently Asked Questions (FAQ)

Q: Can the MP2162AGQH-Z directly replace the MP2119DQ-LF-Z without circuit modifications?

A: Functional substitution is possible due to matching output current, switching frequency, and synchronous rectification. However, the different package footprints (10-QFN versus 8-QFN) require PCB layout redesign. Verify that your application's output voltage and input voltage requirements fall within the MP2162AGQH-Z specifications.

Q: What are the key differences in electrical performance between these devices?

A: Both devices operate at 1.5MHz switching frequency with 2A output current and integrated synchronous rectification. The MP2162AGQH-Z extends the output voltage range to 0.6V minimum (versus 0.8V) and 6V maximum (versus 5.4V), and supports lower input voltage starting at 2.5V (versus 2.7V). Operating temperature range extends to 125°C junction temperature on the substitute.

Q: Is the smaller package size of the MP2162AGQH-Z a limitation?

A: The 8-QFN (2x1.5mm) package is physically smaller than the 10-QFN (3x3mm) original, which may reduce board space but requires updated PCB layout and assembly tooling. Thermal performance characteristics should be evaluated for your specific application thermal requirements.

Q: Are both devices compliant with the same regulatory standards?

A: Yes. Both the MP2119DQ-LF-Z and MP2162AGQH-Z are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Moisture sensitivity level is 1 (Unlimited) for both devices.

Q: Why is the MP2119DQ-LF-Z marked "Not For New Designs"?

A: This designation indicates the device has been superseded by newer alternatives in the manufacturer's product portfolio. The MP2162AGQH-Z represents the active replacement with enhanced specifications and ongoing production support.