MP1518DG-LF-Z

LED Driver IC Overview

The MP1518DG-LF-Z is a boost converter IC from Monolithic Power Systems designed to drive up to six series-connected white LEDs from a single lithium-ion cell. It operates with an input voltage range of 2.5 V to 6 V and delivers a switch current of 350 mA. The device features a fixed switching frequency of 1.3 MHz and supports PWM dimming. It utilizes a low feedback voltage of 104 mV to enhance efficiency. The component is housed in an 8-pin QFN (2 mm x 2 mm) package and functions within a junction temperature range of -40°C to +125°C.

LED Driver IC Feature Summary

• Integrates a power MOSFET for driving multiple series white LEDs
• Supports PWM dimming control for brightness adjustment
• Includes open LED protection via OV pin monitoring
• Features soft-start capability to limit inrush current

LED Driver IC Applications

• Mobile phone backlighting systems
• Portable electronic device illumination
• Single-cell battery powered LED arrays

LED Driver IC Procurement Notes

Verify the specific suffix DG against the manufacturer's datasheet to confirm the 8-QFN package variant. Ensure the LF designation aligns with RoHS compliance requirements for your assembly process. Cross-reference the part number with authorized distributors to confirm current availability and lead times, as supply chain conditions may vary.

LED Driver IC Selection Notes

Select this component when designing circuits requiring high efficiency for driving multiple series LEDs from a single cell source. The integrated MOSFET reduces external component count compared to discrete solutions. Consider the 1.3 MHz switching frequency for balancing EMI performance and passive component size. Verify that the load current requirements do not exceed the internal switch limits under all operating conditions.

LED Driver IC Part Context

This part belongs to the MP1518 family of LED drivers. Variants such as MP1518DJ offer alternative packaging options like TSOT23-6. The MP1518 series is distinct from other MPS regulators like the MP1591 buck converter. It is specifically engineered for white LED applications rather than general-purpose power regulation.

LED Driver IC Replacement Considerations

Direct substitutes include MP1518DJ-LF-Z and MP1518DJE-LF-Z. These variants share the same electrical functionality but differ in package type or thermal characteristics. Verify pin compatibility before substitution.