MP8124GD-P

Overview

The MP8124GD-P is a switching voltage regulator from Monolithic Power Systems designed for LNB power supply applications. It operates with an input voltage range of 8 V to 14 V and provides a single regulated output at 40 V. The device features a fixed switching frequency of 440 kHz and includes shutdown functionality. It is housed in a QFN-14 package (14-VFQFN, 2x3 mm) suitable for surface mount installation. The component supports a load regulation of 25 mV and has a quiescent current of 12 mA. It functions within a junction temperature range of -40°C to +125°C.

Feature Summary

• Integrated synchronous buck converter topology optimized for low noise satellite receiver applications
• Fixed internal switching frequency eliminates external timing components
• Dedicated shutdown pin enables system power management and standby modes

Applications

• Satellite signal receiver set-top box designs
• Low Noise Block downconverter (LNB) power supplies
• Voltage regulation for satellite communication equipment

Procurement Notes

Verify the specific suffix GD-P against official MPS documentation to confirm package dimensions and tape-and-reel specifications. Ensure compatibility with RoHS3 standards if required by your manufacturing process. Cross-reference the 14-QFN footprint with your PCB library to guarantee accurate solder mask and paste stencil definitions before finalizing procurement orders.

Selection Notes

Select this component when designing power stages for satellite receivers requiring a stable 40 V rail from an 8-14 V source. The fixed 440 kHz frequency simplifies filter design compared to programmable alternatives. Consider the thermal performance of the QFN-14 package relative to your expected load current and ambient operating conditions to ensure reliable operation within the specified temperature range.

Part Context

This part belongs to the MP8124 family of specialized regulators manufactured by Monolithic Power Systems. These devices are engineered specifically for the demanding requirements of satellite television infrastructure. The series focuses on providing clean, regulated power to sensitive analog front-end components while maintaining efficiency in compact form factors typical of modern consumer electronics.

Replacement Considerations

Public confirmed substitute part numbers: MP8124GD-Z.