MP8128GQ-Z

Overview

The MP8128GQ-Z is a switching regulator from Monolithic Power Systems designed for LNB power regulation. It features an I2C interface and supports DiSEqC 2.x functions. The device operates with a boost topology, delivering up to 1 A output current at a maximum voltage of 40 V. It functions within a switching frequency of 440 kHz and withstands temperatures between -40°C and +125°C. Packaged in a QFN-20 format, it integrates control logic for satellite receiver applications.

Feature Summary

• Integrates I2C interface for digital control and configuration
• Supports DiSEqC 2.x protocol for satellite signal modulation
• Utilizes boost topology for efficient LNB power supply generation

Applications

• Satellite signal receiver top box designs
• LNB power regulation circuits
• Switching regulator systems requiring DiSEqC compliance

Procurement Notes

Verify the specific suffix 'Z' indicates lead-free status per MPS standards. Confirm the QFN-20 package dimensions match your PCB footprint requirements. Ensure the I2C address configuration aligns with your system bus architecture before finalizing integration.

Selection Notes

Select this component when designing satellite receivers requiring integrated DiSEqC 2.x handling. The boost topology suits input voltages lower than the required 40 V LNB supply. Verify thermal management capabilities for the QFN-20 package under continuous 1 A load conditions.

Part Context

This part belongs to the MP8128 series of specialized power regulators. It complements other MP812x variants by offering specific DiSEqC support. The QFN-20 package provides a compact solution for space-constrained satellite communication hardware designs.

Replacement Considerations

MP8128GQ-P is a verified alternative within the same series. Both share identical electrical specifications and functionality. The primary distinction lies in packaging or environmental compliance details rather than performance characteristics.