MP1531DQ-LF-Z

Overview

The MP1531DQ-LF-Z is a low-power, three-output step-up switching regulator designed for TFT LCD bias applications. It operates from an input voltage range of 2.7 V to 5.5 V and provides adjustable output voltages up to 22 V. The device integrates a 500 mA power switch and functions at a fixed switching frequency of 250 kHz. It features a low quiescent current of 1.2 mA and supports operation within a temperature range of -40°C to +85°C. The component is housed in a compact 16-pin QFN package with an exposed pad.

Feature Summary

• Integrates three independent boost converters for simultaneous TFT bias generation
• Utilizes current-mode control architecture for stable regulation
• Includes internal power switch rated for 500 mA load current
• Supports adjustable output voltage configuration via external resistors

Applications

• TFT LCD panel bias supply circuits
• Portable electronic display backlighting systems
• Multi-rail power management for mobile devices

Procurement Notes

Verify the specific suffix and marking code against the manufacturer's official datasheet to ensure correct pinout and electrical specifications. Confirm RoHS compliance status and environmental declarations prior to integration. Check for obsolete or not recommended for new design (NRND) status updates directly from Monolithic Power Systems documentation before finalizing procurement plans.

Selection Notes

Select this component when designing power supplies for TFT LCD panels requiring multiple bias rails from a single low-voltage source. Ensure the input voltage range matches the system battery or rail characteristics. Verify that the required output currents do not exceed the integrated switch limits. Consider thermal performance requirements given the QFN-16 package constraints for high-density layouts.

Part Context

This part belongs to the MP1531 series of low-power step-up regulators manufactured by Monolithic Power Systems. It is specifically engineered for display applications, distinguishing itself from general-purpose converters by its optimized multi-output topology. The series focuses on minimizing board space while providing necessary voltage levels for liquid crystal driver ICs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Monolithic Power Systems technical support for direct replacements or pin-compatible alternatives.